WO2018120240A1 - 一种调整电磁波辐射参数的装置、方法以及存储介质 - Google Patents

一种调整电磁波辐射参数的装置、方法以及存储介质 Download PDF

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Publication number
WO2018120240A1
WO2018120240A1 PCT/CN2016/113989 CN2016113989W WO2018120240A1 WO 2018120240 A1 WO2018120240 A1 WO 2018120240A1 CN 2016113989 W CN2016113989 W CN 2016113989W WO 2018120240 A1 WO2018120240 A1 WO 2018120240A1
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WIPO (PCT)
Prior art keywords
antenna
mobile terminal
electromagnetic wave
waveform signal
radiation intensity
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PCT/CN2016/113989
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English (en)
French (fr)
Inventor
黄海
杨江涛
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华为技术有限公司
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Priority to PCT/CN2016/113989 priority Critical patent/WO2018120240A1/zh
Publication of WO2018120240A1 publication Critical patent/WO2018120240A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • Embodiments of the present invention relate to the field of mobile communications technologies, and in particular, to an apparatus, method, and storage medium for adjusting electromagnetic wave radiation parameters.
  • the electromagnetic absorption rate (SAR) indicator is used internationally to measure the energy absorbed by the human body in an electromagnetic wave exposure environment. Due to the widespread popularity of mobile terminals (such as mobile phones, tablets, etc.) in the world, in recent years, more and more national government departments, telecommunications regulatory agencies and other requirements to reduce SAR to an appropriate level. Many countries have enacted regulations to ensure the safety of electromagnetic radiation to the human body by limiting the upper limit of the SAR of mobile terminals. The maximum allowable absorption ratio of various antenna mobile terminals when interacting with the human body is clearly defined.
  • the common practice in the industry is to add a sensor pad and a capacitance detecting chip in the mobile terminal.
  • the sensor pad and the human body form a capacitance
  • the capacitance formed by the sensor pad and the human body is detected by a dedicated capacitance detecting chip, according to the detected
  • the capacitance determines the distance of the human body from the sensor pad.
  • the electromagnetic wave radiation amount of the mobile terminal is adjusted to reduce the SAR.
  • the embodiment of the invention provides a scheme for adjusting parameters of electromagnetic wave radiation, which simplifies the design scheme and reduces the design cost.
  • a mobile terminal comprising: a processor, a memory, an antenna; the memory is configured to store computer executable program code, the program code includes instructions; and the processor is configured to execute the The instruction is: transmitting a first waveform signal to the antenna; receiving a second waveform signal, wherein the second waveform signal is formed by the first waveform signal being reflected by the antenna; and adjusting the location according to the second waveform signal.
  • the electromagnetic radiation intensity and/or radiation direction of the mobile terminal By using the processor, the memory and the antenna component of the mobile terminal, the electromagnetic radiation intensity and/or the radiation direction of the mobile terminal can be adjusted without additional detection components, which simplifies the implementation scheme and reduces the design cost.
  • the processor adjusts an electromagnetic wave radiation intensity and/or a radiation direction of the mobile terminal according to the second waveform signal, and includes: the processor determines, according to the second waveform signal, For a time, the first time is a rising edge time of the second waveform signal; according to the first time, adjusting an electromagnetic wave radiation intensity and/or a radiation direction of the mobile terminal; and/or the processor is configured according to The second waveform signal determines a first capacitance, the first capacitance is a capacitance of the antenna relative to the ground; and according to the first capacitance, adjusting an electromagnetic wave radiation intensity and/or a radiation direction of the mobile terminal; and/ Or the processor determines a distance between the human body and the antenna according to the second waveform signal; and adjusts an electromagnetic wave radiation intensity and/or a radiation direction of the mobile terminal according to a distance between the human body and the antenna.
  • the processor may increase the mobile terminal The intensity of the electromagnetic radiation and/or the direction of the radiation is adjusted to improve the radio frequency performance of the mobile terminal.
  • the rising edge time of the second square wave signal and the capacitance of the antenna relative to the Emperor can reflect the distance between the antenna and the human body.
  • This design method adaptively adjusts the electromagnetic wave radiation of the mobile terminal according to the distance between the antenna and the human body. The amount, while taking into account when the human body is close to the antenna, reducing the impact of electromagnetic radiation on the human body, and When the human body is away from the antenna, the radio frequency performance of the mobile terminal is improved.
  • the first waveform signal is a rectangular wave, a sawtooth wave, a square wave, a triangular wave, or a sine wave signal.
  • the processor adjusts an electromagnetic wave radiation intensity and/or a radiation direction of the mobile terminal, including: the processor switches an operating state of the antenna, wherein: when the antenna is in an operating state When changing, the electromagnetic radiation intensity and/or radiation direction of the mobile terminal is different. By switching the working state of the antenna, it is possible to adjust the electromagnetic radiation intensity and/or the radiation direction of the mobile terminal.
  • the antenna includes a first antenna and a second antenna; and the processor switches an operating state of the antenna, including: the processor switches the antenna by the first antenna radiation Radiation for the second antenna; the electromagnetic radiation intensity of the second antenna is different from the electromagnetic radiation intensity of the first antenna; and/or the electromagnetic radiation direction of the second antenna and the electromagnetic radiation of the first antenna The direction is different.
  • the mobile terminal further includes an antenna matching circuit; the antenna matching circuit is connected to the antenna; the antenna matching circuit includes a first matching circuit and a second matching circuit;
  • the working state of the antenna includes: the processor switches the antenna matching circuit from the first matching circuit to the second matching circuit; and the electromagnetic wave radiation intensity when the antenna is connected to the second matching circuit And the electromagnetic wave radiation intensity when the first matching circuit is connected to the antenna is different; and/or the electromagnetic wave radiation direction when the antenna is connected to the second matching circuit, when the antenna is connected to the first matching circuit The electromagnetic wave radiation direction is different.
  • an antenna matching circuit that has a small radiation to the human body and the hearing aid device after being connected to the antenna is selected to reduce the influence of the electromagnetic wave radiation on the human body; when the human body is away from the antenna, the selection is made.
  • the antenna includes a main antenna, a switching device, and a reserved trace; the switching device is configured to control the main antenna to be connected or disconnected from the reserved trace; the processor Switching the working state of the antenna includes: the processor switching an operating state of the switching device, connecting the main antenna to the reserved trace to form a new antenna; and electromagnetic wave radiation intensity of the new antenna The electromagnetic radiation intensity of the main antenna is different; and/or the electromagnetic wave radiation direction of the new antenna is different from the electromagnetic wave radiation direction of the main antenna.
  • Switching between the main antenna or the new antenna through the switching device when the human body is close to the antenna, the antenna having less radiation to the human body and the hearing aid device is selected to reduce the influence of the electromagnetic radiation on the human body; when the human body is away from the antenna, the radio frequency performance is better.
  • Antenna to improve the RF performance of mobile terminals.
  • the mobile terminal further includes a power amplifier; the processor adjusting an electromagnetic radiation intensity of the mobile terminal, the processor comprising: adjusting a control voltage and/or a power voltage of the power amplifier Wherein: the electromagnetic wave radiation intensity of the mobile terminal is different when the control voltage and/or the power supply voltage of the power amplifier changes; and/or the processor adjusts a gain of the power amplifier, wherein: when the power When the gain of the amplifier changes, the electromagnetic wave radiation intensity of the mobile terminal is different.
  • the processor adjusts the electromagnetic wave radiation intensity of the mobile terminal according to the second waveform signal, and includes: the processor reduces the mobile terminal according to the second waveform signal An electromagnetic wave radiation intensity; and/or the processor increases an electromagnetic wave radiation intensity of the mobile terminal according to the second waveform signal. According to the distance between the antenna and the human body, the adaptability reduces or increases the electromagnetic radiation intensity of the mobile terminal.
  • the mobile terminal further includes a sensor; the sensor includes a proximity sensor, an ambient light sensor, and/or an accelerometer sensor; the processor receives sensing data sent by the sensor; The processor determines, according to the sensing data, that the mobile terminal transmits a first waveform signal to the antenna when the mobile terminal approaches the human body. This increases the distance between the antenna and the human body. Adjusting the accuracy of the electromagnetic wave radiation intensity of the mobile terminal, and further, when determining that the mobile terminal is not close to the human body according to the sensing data, the first waveform signal may not be sent to the antenna, thereby saving power consumption of the mobile terminal.
  • the mobile terminal further includes a positioning module, where the positioning module is configured to determine a location where the mobile terminal is located; and an upper limit of the SAR specified by the mobile terminal according to a national or regional regulation of the current location.
  • the value further determines the switching scheme of the antenna working state according to the upper limit value of the SAR, and/or the maximum transmitting power of the mobile phone.
  • a method for adjusting electromagnetic wave radiation parameters of a mobile terminal which is applied to a mobile terminal, the mobile terminal includes an antenna, and the method includes: the mobile terminal sends a first waveform signal to the antenna; a second waveform signal, wherein the first waveform signal is formed by the antenna reflection; and the electromagnetic wave radiation intensity and/or the radiation direction of the mobile terminal is adjusted according to the second waveform signal.
  • the implementation of the method and the beneficial effects of each possible mobile terminal according to the first aspect and the first aspect can be seen by the method and the beneficial effects of the method.
  • the possible implementation manners of the mobile terminal of the first aspect and the first aspect are not repeated herein.
  • an apparatus comprising: a sending unit, a receiving unit, and a processing unit: the sending unit is configured to send a first waveform signal to an antenna; and the receiving unit is configured to receive a second waveform signal, The second waveform signal is formed by the first waveform signal being reflected by the antenna; and the processing unit is configured to adjust an electromagnetic wave radiation intensity and/or a radiation direction of the device according to the second waveform signal.
  • a storage medium being a non-transitory computer readable storage medium, the non-volatile computer readable storage medium storing at least one program, each of the The program includes instructions that, when executed by a mobile terminal having a processor, an antenna, cause the mobile terminal to perform the various possible method designs of the second and second aspects described above.
  • the solution provided by the embodiment of the invention simplifies the implementation scheme of adjusting the electromagnetic radiation intensity and/or the radiation direction according to the distance between the antenna and the human body, and reduces the design cost.
  • FIG. 1 is a schematic diagram of a mobile terminal located near a human body
  • FIG. 2 is a block diagram showing a part of a structure of a mobile phone 100 according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a capacitance of an antenna to ground relative to a distance between an antenna and a human body according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram showing a variation of a rising edge time of a second waveform according to an antenna and a human body in an embodiment of the present invention
  • FIG. 5 is a functional structural diagram of a mobile phone 100 according to an embodiment of the present invention.
  • FIG. 6 is a graph of maximum transmit power and time of the mobile phone 100 according to an embodiment of the present invention.
  • FIG. 7 is a flowchart of a method for adjusting electromagnetic radiation intensity and/or radiation direction of a mobile phone according to an embodiment of the present invention
  • FIG. 8 is a structural diagram of a device according to an embodiment of the present invention.
  • the transmission power of the mobile terminal is adjusted according to the detected distance, and the current industry detection method for detecting the distance between the human body and the mobile terminal needs to add a dedicated detection chip to increase the design cost, and Increase the layout area of the PCB.
  • the embodiment of the present invention sends a first waveform signal to an antenna through a mobile terminal, and receives a second waveform signal, the second wave.
  • the shape signal is formed by the first waveform signal being reflected by the antenna; and the electromagnetic wave radiation parameter of the mobile terminal is adjusted according to the second waveform signal, specifically, adjusting the electromagnetic wave radiation intensity and/or the radiation direction of the mobile terminal.
  • the second waveform signal can reflect the distance between the human body and the mobile terminal.
  • the electromagnetic wave radiation intensity of the mobile terminal is reduced according to the second waveform signal and/or the radiation direction is adjusted to reduce the influence of the electromagnetic wave radiation of the mobile terminal on the human body. Maintaining the adjusted electromagnetic wave radiation parameter until the second waveform signal reflects that the distance between the human body and the mobile terminal is greater than the distance threshold, increasing the electromagnetic wave radiation intensity of the mobile terminal according to the second waveform signal and/or adjusting the radiation direction to improve the mobile terminal RF performance.
  • the solution of the embodiment of the present invention can solve the problem of the prior art, that is, the electromagnetic wave radiation parameter of the mobile terminal can be adjusted without adding a dedicated detection chip, thereby reducing the SAR when the human body approaches the mobile terminal, and when the human body is away from the mobile terminal. Improve the radio performance of the mobile terminal.
  • SAR is the electromagnetic wave absorption ratio or specific absorption rate. It is the electromagnetic wave energy absorption ratio of mobile terminals or wireless products. Since various organs of the human body are conductive media, electromagnetic energy is absorbed and dissipated. SAR is the electromagnetic power absorbed by human tissue per unit mass, which can measure the influence of electromagnetic energy of mobile terminal products on the human body. The unit of SAR is W/Kg (Watt/kg). The larger the SAR, the greater the influence of the electromagnetic energy of the mobile terminal product on the human body; otherwise, the smaller the impact.
  • the mobile terminal illustrated in FIG. 1 When the mobile terminal is close to the human body, for example, the mobile terminal illustrated in FIG. 1 is located on the right side of the user's head, on the left side of the head, in one hand, and in both hands, the electromagnetic energy generated by the mobile terminal is absorbed by the human head and the human hand.
  • the mobile terminal may be a portable mobile terminal such as a mobile phone, or may be a mobile device such as a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), a car computer, or the like.
  • Communication device for communication functions For convenience of description, the embodiment of the present invention uses a mobile phone as an example for exemplary description.
  • FIG. 2 is a block diagram showing a partial structure of a mobile phone 100 according to an embodiment of the present invention.
  • the mobile phone 100 can include a housing 105 (shown in FIG. 1), a display screen 140, a memory 120, a processor 180, an antenna 104, a radio frequency circuit 110, a positioning module 195, a sensor 150, and other input devices 130, I. /O subsystem 170, audio circuit 160, power supply 190, and the like.
  • the structure of the handset shown in Figure 2 does not constitute a limitation to the handset, it may include more or fewer components than illustrated, or some components may be combined, or some components may be split, or different components may be arranged.
  • the handset 100 can have a housing 105.
  • An antenna for processing wireless communication can be housed within the housing 105.
  • Housing 105 which may also be referred to as a housing, may be formed from any suitable material. These include plastic, glass, ceramic, metal, or other suitable materials, or a combination of these materials.
  • portions of the housing 105 or housing 105 may be formed of a dielectric or other low conductivity material; thereby not interfering with the operation of the conductive antenna elements located adjacent the housing 105.
  • the housing 105 or portions of the housing 105 may also be formed from a conductive material, such as a metal. Where the housing 105 is formed from a metal component, one or more metal components can be used as part of the antenna in the handset 100.
  • the display screen 140 can be used to display information input by the user or information provided to the user as well as various menus of the mobile phone 100, and can also accept user input.
  • the specific display screen 140 may include a display panel 141 and a touch panel 142.
  • the display panel 141 can be configured by using an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode), or the like.
  • the touch panel 142 also referred to as a touch screen, a touch sensitive screen, etc., can collect contact or non-contact operations on or near the user (such as the user using any suitable object such as a finger, a stylus, or the like on or near the touch panel 142).
  • the operation in the vicinity of the touch panel 142 may also include a somatosensory operation; the operation includes a single-point control operation, a multi-point control operation, and the like, and drives the corresponding connection device according to a preset program.
  • the touch panel 142 may include two parts: a touch detection device and a touch controller. Wherein, the touch detection device detects the touch orientation and posture of the user, and detects a signal brought by the touch operation, and transmits a signal to the touch controller; the touch controller receives the touch information from the touch detection device, and converts the signal into a processor. The processed information is sent to the processor 180 and can receive commands from the processor 180 and execute them.
  • the touch panel 142 can be implemented by using various types such as resistive, capacitive, infrared, and surface acoustic waves, and the touch panel 142 can be implemented by any technology developed in the future.
  • the touch panel 142 can cover the display panel 141, and the user can display the content according to the display panel 141 (the display content includes, but is not limited to, a soft keyboard, a virtual mouse, a virtual button, an icon, etc.) on the display panel 141. Operation is performed on or near the covered touch panel 142.
  • the touch panel 142 After detecting the operation thereon or nearby, the touch panel 142 transmits to the processor 180 through the I/O subsystem 170 to determine user input, and then the processor 180 according to the user The input provides a corresponding visual output on display panel 141 via I/O subsystem 170.
  • the touch panel 142 and the display panel 141 are used as two separate components to implement the input and input functions of the mobile phone 100 in FIG. 1, in some embodiments, the touch panel 142 may be integrated with the display panel 141. The input and output functions of the mobile phone 100 are implemented.
  • the handset 100 can also include a memory 120 for storing computer executable program code, the program code including instructions.
  • the processor 180 executes various functional applications and data processing of the mobile phone 100 by executing instructions stored in the memory 120.
  • the memory 120 may mainly include a storage program area and a storage data area.
  • the storage program area can store an operating system, an application required for at least one function (such as a sound playing function, an image playing function, etc.).
  • the storage data area can store data (such as audio data, phone book, etc.) created according to the use of the mobile phone 100.
  • memory 120 can include high speed random access memory, and can also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
  • the handset 100 can also include a processor 180.
  • the processor 180 is a control center of the mobile phone 100. Connect the various parts of the entire phone with a variety of interfaces and lines. The various functions and processing data of the handset 100 are performed by running or executing software programs and/or modules stored in the memory 120, as well as recalling data stored in the memory 120, thereby providing overall monitoring of the handset.
  • processor 180 may include one or more processing units.
  • the processor 180 can integrate an application processor, a modem processor, a baseband module, a power management chip, a memory, a codec, and the like. Among them, the application processor mainly deals with operating systems, user interfaces, applications, and the like.
  • the modem processor primarily handles wireless communications.
  • the above modem processor may not be integrated into the processor 180.
  • the Internet Protocol, Wireless Local Area Network Protocol (e.g., IEEE 702.11), 3G, 4G, 5G communication protocols, etc., can be implemented using the processor 180 and the memory 120.
  • the handset 100 can also include an antenna 104 for transmitting and receiving radio frequency signals.
  • the antenna 104 can be located anywhere in the handset 100. The position of the antenna illustrated in the embodiment of the present invention is merely exemplary. Bright. Cell phone 100 can have one or more antennas. Each antenna in handset 100 can be used to cover a single or multiple communication bands.
  • the handset 100 also includes a radio frequency circuit 110. Used to receive and send signals during sending or receiving information or during a call. For example, after receiving the downlink information of the base station, it is sent to the processor 180 for processing. In addition, the uplink data is transmitted to the base station.
  • the radio frequency circuit 110 includes at least one power amplifier 109, a transceiver 108, a coupler, an LNA (Low Noise Amplifier), a duplexer, and the like.
  • the radio frequency circuit 110 can also communicate with the network and other devices through wireless communication.
  • the wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA (Code Division Multiple Access). , Code Division Multiple Access), WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution), e-mail, SMS (Short Messaging Service), and the like.
  • the handset 100 can also include a power amplifier 109 for amplifying the radio frequency signals to be transmitted by the handset 100.
  • Power amplifier 109 can be implemented using one or more gain stages in one or more integrated circuits, as shown in FIG. It will be appreciated that there may be a plurality of power amplifiers 109, each associated with a communication band or a group of communication bands. To simplify the description, FIG. 2 is schematically illustrated by a single power amplifier 109 symbol.
  • the mobile phone 100 may further include a positioning module 195.
  • the positioning module is configured to detect the position, orientation, and the like of the mobile phone 100. Detection of the location or orientation of the handset 100 can be performed using various positioning services, such as Global Positioning System (GPS), Assisted GPS (A-GPS), cellular based on registered cellular telephones. Telephone base station triangulation or trilateration, Galileo positioning system, or other positioning or location services or technologies.
  • Various hardware, software, and combinations thereof can be used to detect the location or orientation of the handset 100, such as GPS units, accelerometers, and other orientation and motion detection services or technologies in the handset 100.
  • the handset 100 can also include a sensor 150, which can include a proximity sensor, an ambient light sensor, an accelerometer sensor, and the like.
  • the ambient light sensor can adjust the brightness of the display panel 141 according to the brightness of the ambient light
  • the proximity sensor can close the display panel 141 and/or the backlight when the mobile phone 100 moves to the ear.
  • Proximity sensors can include, for example, light emitting diodes (LEDs) and associated photodetectors, such as photodiodes.
  • the light emitting diode may be an infrared light emitting diode, and the infrared light 11 is emitted outward through the light emitting diode (as shown in FIG. 5).
  • Photodiodes are used to detect infrared reflected light 12 from nearby objects (see Figure 5). When sufficient reflected light is detected, it can be determined that there is an object in the vicinity of the mobile phone 100. When insufficient reflected light is detected, it can be determined that there is no object near the mobile phone 100.
  • the ambient light sensor can be a photodiode or other light sensor capable of detecting incoming light 13 (as in Figure 5).
  • Ambient light sensors can operate in the visible and/or infrared spectrum. When the ambient light sensor is not obscured by the object, the ambient light sensor will typically receive more light 13 than when the ambient light sensor is blocked by the object, so ambient light sensors can be used to generate proximity data. This data can be used alone or in combination with proximity data from other sensors so that the handset 100 can more accurately determine if there are objects near the handset.
  • Accelerometer sensors detect the magnitude of acceleration in all directions (typically three axes). The magnitude and direction of gravity can be detected when the handset 100 is stationary.
  • the accelerometer sensor can be used to identify the gesture of the phone (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tap).
  • An accelerometer can be used to determine if the handset 100 is in motion (possibly held by the user), or if the handset 100 is being held by the user such that its left or right edge is facing down, or if the handset 100 is being placed horizontally on the desktop. If it is determined that the handset 100 is horizontal and stationary, it can be determined that the handset 100 is less likely to be held. This data can be combined with data from proximity sensors and other data to assist in determining whether the readings obtained from other sensors in the handset 100 are accurate.
  • the mobile phone 100 can process signals from a plurality of sensor devices (eg, proximity sensors, ambient light sensors, etc.) in parallel, determine whether there is an object in the vicinity of the mobile phone 100, and improve the accuracy of determining the distance between the mobile phone 100 and the object.
  • sensor devices eg, proximity sensors, ambient light sensors, etc.
  • sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and the like that can be configured in the mobile phone 100 will not be described herein.
  • Other input devices 130 can be used to receive input numeric or character information, as well as generate key signal inputs related to user settings and function controls of the handset 100.
  • other input devices 130 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, joysticks, and light mice (the light mouse is not sensitive to display visual output).
  • function keys such as volume control buttons, switch buttons, etc.
  • trackballs mice, joysticks, and light mice (the light mouse is not sensitive to display visual output).
  • Other input devices 130 are coupled to other input device controllers 171 of I/O subsystem 170 for signal interaction with processor 180 under the control of other device input controllers 171.
  • the audio circuit 160, the speaker 161, and the microphone 162 can provide an audio interface between the user and the handset 100.
  • the audio circuit 160 can transmit the converted audio data to the speaker 161 for conversion to the sound signal output by the speaker 161.
  • the microphone 162 converts the collected sound signal into a signal, which is received by the audio circuit 160 and then converted into audio data, and then the audio data is output to the radio frequency circuit 110 for transmission to, for example, another mobile phone, or the audio data is output to the memory. 120 for further processing.
  • the I/O subsystem 170 is used to control external devices for input and output, and may include other device input controllers 171, sensor controllers 172, and display controllers 173.
  • one or more other input control device controllers 171 receive signals from other input devices 130 and/or send signals to other input devices 130.
  • Other input devices 130 may include physical buttons (press buttons, rocker buttons, etc.) , dial, slide switch, joystick, click wheel, light mouse (light mouse is a touch-sensitive surface that does not display visual output, or an extension of a touch-sensitive surface formed by a touch screen). It is worth noting that other input control device controllers 171 can be connected to any one or more of the above devices.
  • Display controller 173 in I/O subsystem 170 receives signals from display 140 and/or transmits signals to display 140. After the display 140 detects the user input, the display controller 173 converts the detected user input into an interaction with the user interface object displayed on the display screen 140, ie, implements human-computer interaction. Sensor controller 172 can receive signals from one or more sensors 150 and/or send signals to one or more sensors 150.
  • the handset 100 also includes a power source 190 (such as a battery) that powers the various components.
  • a power source 190 such as a battery
  • the power source can be logically coupled to the processor 180 through the power management system to manage functions such as charging, discharging, and power consumption through the power management system.
  • the mobile phone 100 may further include a camera, a Bluetooth module, and the like, and details are not described herein.
  • the antenna 104 When the handset 100 is in proximity to the human body, the antenna 104 will be close to the human body, so it is likely to emit radio frequency signals in the vicinity of the human body. In order to ensure the safety of the electromagnetic radiation emitted by the antenna 104 to the human body, when it is determined that the mobile phone 100 is in the vicinity of the human body, the mobile phone 100 can adjust the electromagnetic wave radiation parameters, such as reducing the electromagnetic wave radiation intensity of the mobile phone and/or adjusting the radiation direction of the electromagnetic wave to reduce the electromagnetic wave radiation. The impact on the human body.
  • the mobile phone 100 can adjust the electromagnetic wave radiation parameters, for example, increase the electromagnetic wave radiation intensity of the mobile phone and/or adjust the radiation direction of the electromagnetic wave to improve the radio frequency performance of the mobile phone 100.
  • the antenna of the mobile phone 100 Since the antenna of the mobile phone 100 has a capacitance relative to the ground, when the human body approaches the antenna of the mobile phone 100, the capacitance of the antenna relative to the earth increases. The change in the capacitance of the antenna relative to the earth can reflect the change in distance between the human body and the antenna. When the distance from the human body to the antenna is from far to near, the capacitance of the antenna relative to the earth gradually becomes larger. As shown in FIG. 3, C1 is greater than C1.
  • the embodiment of the present invention may send a first waveform signal to the antenna through the processor 180 of the mobile phone 100, and receive a second waveform signal, where the second waveform signal is formed by the first waveform signal being reflected by the antenna, according to the second waveform.
  • the signal adjusts the electromagnetic wave radiation parameters of the mobile phone 100.
  • the first waveform signal may be a waveform signal such as a rectangular wave, a sawtooth wave, a square wave, a triangular wave, or a sine wave.
  • the processor sends a square wave signal to the antenna as an example, as shown in FIG. 4 .
  • the first square wave signal is reflected by the antenna to form a second square wave signal, and the antenna transmits the second square wave signal to the vicinity Processor.
  • the rising edge of the second square wave signal is more gentle with respect to the rising edge of the first square wave signal.
  • the capacitance of the antenna relative to the earth is inversely proportional to the distance between the human body and the antenna, that is, the smaller the distance between the human body and the antenna, the larger the capacitance of the antenna relative to the earth; the larger the distance between the human body and the antenna, the larger the antenna The smaller the capacitance of the earth.
  • the larger the capacity of the antenna C1 relative to the earth the more gentle the rising edge of the second square wave signal. That is: the more energy the capacitor absorbs, the longer the charging time. As indicated by the dashed line in Fig. 4, t1 ⁇ t2.
  • T1 is a relatively long distance between the human body and the antenna, that is, an example of charging time of the antenna relative to the capacitance of the earth when the capacitance of the antenna relative to the earth is small.
  • T2 is an example of the distance between the human body and the antenna, that is, an example of the charging time of the antenna relative to the capacitance of the earth when the capacitance of the antenna relative to the earth is large.
  • the processor can adjust the electromagnetic wave radiation parameters of the mobile phone 100 according to the second square wave signal, for example, adjusting the electromagnetic wave radiation intensity and/or the radiation direction of the mobile phone 100. Regarding how the processor adjusts the electromagnetic wave radiation parameters of the mobile phone 100 according to the second square wave signal, it will be described in detail later.
  • the capacitance of the antenna relative to the earth is inversely proportional to the distance between the human body and the antenna. That is, the smaller the distance between the human body and the antenna, the larger the capacitance of the antenna relative to the earth; the larger the distance between the human body and the antenna, the smaller the capacitance of the antenna relative to the earth.
  • the finite number of experiments or calculations obtain the correspondence between the capacitance of the antenna relative to the earth and the charging time of the capacitor, and/or the correspondence between the capacitance of the antenna relative to the earth and the distance between the human body and the antenna, and/or the charging time of the capacitor.
  • Correspondence with the distance between the human body and the antenna is as shown in Table 1.
  • the above correspondence may be stored in the memory 120 in advance. For example, when determining the charging time of the antenna relative to the capacitance of the earth, and/or the capacitance of the antenna relative to the earth, the distance between the human body and the antenna can be determined by looking up the correspondence stored in the memory 120.
  • the capacitance of the antenna relative to the earth may be determined according to the rising edge time of the second square wave signal
  • the human body may be determined according to the rising edge time of the second square wave signal and/or the capacitance of the antenna relative to the earth.
  • the distance between the antennas and vice versa Therefore, the rising edge time of the second square wave signal, and/or the capacitance of the antenna relative to the earth, can indirectly reflect the distance between the human body and the antenna, and vice versa.
  • the mobile phone 100 can reduce the electromagnetic radiation intensity of the mobile phone 100 and/or adjust the radiation direction away from the human body to reduce the influence of the electromagnetic wave radiation of the mobile phone 100 on the human body; and maintain the reduced electromagnetic radiation intensity of the mobile phone 100 and/or The adjusted radiation direction until the rising edge time of the second square wave signal is less than the preset rising edge time, and/or the capacitance of the antenna relative to the earth is less than the preset capacitance, and/or the distance between the antenna and the human body is greater than the pre- When the distance is set, the mobile phone 100 can increase the electromagnetic radiation intensity of the mobile phone 100 and/or adjust the radiation direction to improve the radio frequency performance of the mobile phone 100; Maintaining the increased electromagnetic radiation intensity of the mobile phone 100 and
  • the rising edge time of the second square wave signal (the charging time of the antenna relative to the capacitance of the earth) can be compared with the preset rising edge time (preset charging time) to determine the rising edge time of the second square wave signal (the antenna is relative to the antenna)
  • the charging time of the earth's capacitor is greater or less than the preset rising edge time.
  • the rising edge time of the second square wave signal is greater than the preset rising edge time, it is reflected that the distance between the human body and the antenna is less than the preset distance.
  • the rising edge time of the second square wave signal is less than the preset rising edge time, it is reflected that the distance between the human body and the antenna is greater than the preset distance.
  • the capacitance of the antenna relative to the ground can be compared with a preset capacitance to determine whether the capacitance of the antenna relative to the ground is greater than or less than a predetermined capacitance.
  • a preset capacitance When the capacitance of the antenna relative to the earth is greater than the preset capacitance, it is reflected that the distance between the human body and the antenna is less than the preset distance.
  • the capacitance of the antenna relative to the ground is less than the preset capacitance, it is reflected that the distance between the human body and the antenna is greater than the preset distance.
  • the distance between the antenna and the human body can be compared with a preset distance to determine whether the distance between the antenna and the human body is greater than or less than a preset distance.
  • the processor for transmitting the first waveform signal to the antenna and receiving the second waveform signal in the embodiment of the present invention may be an application processor, a touch screen controller, and other microprocessors, which are not specifically limited in this embodiment of the present invention.
  • the frequency of the radio frequency signal is high.
  • a low pass filter may be provided between the processor and the antenna for blocking The high frequency signal is reflected by the antenna to the processor, allowing the lower frequency first square wave signal and the second party The wave signal passes.
  • An antistatic protection device (not shown), such as a TVS antistatic tube, may also be provided between the processor and the antenna to prevent electromagnetic signals introduced by the antenna from damaging the processor.
  • the embodiment of the present invention can adjust the electromagnetic radiation intensity and/or the radiation direction of the mobile phone 100 by switching the working state of the antenna and/or adjusting the maximum transmission power of the mobile phone 100 according to the second square wave signal determined by the above embodiment.
  • the following describes how to adjust the electromagnetic radiation intensity and/or radiation direction of the mobile phone 100 by switching the working state of the antenna:
  • the antenna can include a first antenna and a second antenna.
  • Switching the operational state of the antenna includes switching the antenna from the first antenna radiation to the second antenna radiation to effect adjustment of electromagnetic wave radiation intensity and/or radiation direction of the handset 100.
  • the electromagnetic wave radiation intensity of the second antenna is different from the electromagnetic wave radiation intensity of the first antenna; and/or the electromagnetic wave radiation direction of the second antenna is different from the electromagnetic wave radiation direction of the first antenna.
  • the electromagnetic radiation intensity of the second antenna is smaller than the electromagnetic radiation intensity of the first antenna, and/or the radiation direction of the second antenna is farther from the human body than the radiation direction of the first antenna, that is, the second antenna is opposite to the first antenna. It has less radiation to the human body and hearing aid equipment.
  • the first antenna may be an omnidirectional radiation antenna whose radiation direction is omnidirectional.
  • the second antenna may be a unidirectional radiating antenna, and the radiation direction is farther away from the human body.
  • the second antenna has less radiation to the human body and the hearing aid device.
  • the working state of the antenna is switched according to the second square wave signal, including: when the rising edge time of the second square wave signal is greater than a preset rising edge time, and/or the capacitance of the antenna relative to the earth
  • the antenna is switched from the first antenna radiation to the second antenna radiation, thereby reducing the electromagnetic radiation intensity of the mobile phone 100 and / Or adjust the direction of electromagnetic radiation of the mobile phone 100 to reduce the impact of the electromagnetic wave radiation of the mobile phone 100 on the human body.
  • the use is maintained.
  • the two antennas radiate until the rising edge time of the second square wave signal is less than the preset rising edge time, and/or the capacitance of the antenna relative to the earth is less than the preset capacitance, and/or the distance between the antenna and the human body is greater than the preset distance
  • the antenna is switched from the second antenna radiation to the first antenna radiation to increase the electromagnetic radiation intensity of the mobile phone 100 and/or to adjust the radiation direction to improve the radio frequency performance of the mobile phone 100.
  • the antenna is switched from the first antenna radiation to the second antenna radiation, and thus is repeated, and details are not described herein again.
  • the mobile phone 100 may further include an antenna matching circuit; the antenna matching circuit is connected to the antenna; and the antenna matching circuit may include a first matching circuit and a second matching circuit.
  • Switching the working state of the antenna includes switching the antenna matching circuit from the first matching circuit to the second matching circuit to adjust the electromagnetic wave radiation intensity and/or the radiation direction of the mobile phone 100.
  • the electromagnetic wave radiation intensity when the antenna is connected to the second matching circuit is different from the electromagnetic wave radiation intensity when the antenna is connected to the first matching circuit; and/or the electromagnetic wave radiation direction when the antenna is connected to the second matching circuit, and the first matching circuit is connected to the antenna The electromagnetic wave radiation direction is different.
  • the electromagnetic radiation intensity when the antenna is connected to the second matching circuit is smaller than the electromagnetic radiation intensity when the antenna is connected to the first matching circuit, and/or the antenna is connected to the second matching circuit and the antenna is connected to the first matching circuit, and the radiation direction is more Keep away from the human body. That is, the antenna is connected to the second matching circuit, and has less radiation to the human body and the hearing aid device than when the antenna is connected to the first matching circuit.
  • switching the working state of the antenna according to the second square wave signal further includes: when the rising edge time of the second square wave signal is greater than a preset rising edge time, and/or the antenna relative to the earth
  • the antenna matching circuit is switched from the first matching circuit to the second matching circuit, thereby reducing the electromagnetic radiation intensity and/or adjustment of the mobile phone 100.
  • the electromagnetic wave radiation direction of the mobile phone 100 is to reduce the influence of the electromagnetic wave radiation of the mobile phone 100 on the human body.
  • the antenna matching circuit is switched from the second matching circuit to the first matching circuit to increase the electromagnetic wave radiation of the mobile phone 100.
  • the intensity and/or the direction of the radiation is adjusted to enhance the radio frequency performance of the handset 100.
  • the first matching circuit After the second matching circuit is switched to the first matching circuit, the first matching circuit is maintained until the rising edge time of the second square wave signal is greater than the preset rising edge time, and/or the capacitance of the antenna relative to the ground is greater than the preset capacitance And when the distance between the antenna and the human body is less than the preset distance, the antenna matching circuit is switched from the first matching circuit to the second matching circuit, and thus is repeated, and details are not described herein again.
  • the antenna comprises a main antenna, a switching device and a reserved trace; and the switching device is configured to control the main antenna to be connected or disconnected from the reserved trace.
  • Switching the working state of the antenna includes switching the working state of the switching device to connect or disconnect the main antenna with the reserved line to adjust the electromagnetic wave radiation intensity and/or the radiation direction of the mobile phone 100.
  • the main antenna is connected with the reserved trace, a new antenna is formed; the electromagnetic radiation intensity of the new antenna is different from the electromagnetic radiation intensity of the main antenna; and/or the electromagnetic radiation direction of the new antenna is different from the electromagnetic radiation direction of the main antenna.
  • the electromagnetic radiation intensity of the new antenna is smaller than the electromagnetic radiation intensity of the main antenna, and/or the radiation direction of the new antenna is farther from the human body than the radiation direction of the main antenna, that is, the new antenna is compared with the main antenna to the human body and Hearing aid devices have less radiation.
  • the main antenna may be an omnidirectional radiation antenna whose radiation directivity is omnidirectional; the new antenna may be a unidirectional radiation antenna, and the radiation direction is farther away from the human body.
  • the new antenna has less radiation to the human body and hearing aid devices than the main antenna.
  • switching the working state of the antenna according to the second square wave signal further includes: when the rising edge time of the second square wave signal is greater than a preset rising edge time, and/or the antenna relative to the earth When the capacitance is greater than the preset capacitance, and/or the distance between the antenna and the human body is less than the preset distance, the working state of the switching device is switched, so that the main antenna is connected with the reserved line to form a new antenna, and the new antenna is used for radiation reduction.
  • the electromagnetic wave radiation intensity of the mobile phone 100 and/or the electromagnetic wave radiation direction of the mobile phone 100 are adjusted to reduce the influence of the electromagnetic wave radiation of the mobile phone 100 on the human body.
  • the main antenna is connected to the reserved trace, and the new antenna is used to maintain the radiation after the new antenna is used until the rising edge time of the second square wave signal is less than the preset rising edge time, and/or the capacitance of the antenna relative to the ground is less than the preset capacitance. And/or when the distance between the antenna and the human body is greater than the preset distance, the working state of the switching device is switched, so that the main antenna and the pre- The retention line is disconnected, and the main antenna is used to increase the electromagnetic radiation intensity of the mobile phone 100 and/or adjust the radiation direction to improve the radio frequency performance of the mobile phone 100.
  • the main antenna radiation is maintained until the rising edge time of the second square wave signal is greater than the preset rising edge time, and/or the capacitance of the antenna relative to the ground is greater than the preset capacitance, and / Or when the distance between the antenna and the human body is less than the preset distance, the working state of the switching device is switched, and the main antenna is connected with the reserved trace to form a new antenna, and the new antenna is used for radiation, so repeated, and details are not described herein again.
  • the embodiment of the present invention can also adjust the electromagnetic wave radiation intensity and/or the radiation direction of the mobile phone 100 by adjusting the maximum transmit power of the mobile phone 100 according to the second square wave signal.
  • the following describes adjusting the electromagnetic radiation intensity of the mobile phone 100 by adjusting the maximum transmission power of the mobile phone 100:
  • the processor can control the gain of power amplifier 109 through a control path (eg, control path 20).
  • Control path 20 can be used to process analog and/or digital control signals.
  • the gain of the control power amplifier 109 can be controlled by controlling the magnitude of the control voltage and/or the supply voltage of the power amplifier 109. It is also possible to control the gain of the power amplifier 109 by turning on or off part of the gain stage in the power amplifier 109 to achieve adjustment of the electromagnetic radiation intensity of the handset 100.
  • the maximum transmit power of the mobile phone 100 is adjusted according to the second square wave signal, including: when the rising edge time of the second square wave signal is greater than a preset rising edge time, and/or the antenna is relative to the earth
  • the capacitance is greater than the preset capacitance, and/or the distance between the antenna and the human body is less than the preset distance, the control voltage and/or the power supply voltage of the power amplifier 109 is lowered, and/or the partial gain stage in the power amplifier 109 is turned off,
  • the electromagnetic radiation intensity of the mobile phone 100 is reduced to reduce the influence of the electromagnetic wave radiation of the mobile phone 100 on the human body.
  • the radio frequency signal transmitted by the mobile phone passes through the long-distance transmission path to reach the base station; when the mobile phone is blocked by buildings or other, the radio frequency signal must be reflected and refracted multiple times in the wireless shadow area. Attenuation of long-distance transmission; radio frequency signals are also interfered by other channels, such as: adjacent channel, co-channel interference, etc. Therefore, the transmission power of the mobile phone should be high enough to overcome the loss, reflection and refraction of the above-mentioned radio wave propagation path. Attenuation, as well as interference from other radio waves. At the same time, in order to reduce interference, radiation and power consumption of other devices, the transmission power of the mobile phone should be as low as possible.
  • the mobile phone needs to send enough RF power to ensure the communication quality.
  • the mobile phone transmits more power, the higher the electric field strength formed in the human body, the greater the RF radiation power absorbed by the human body, so the communication quality is guaranteed.
  • the smaller the mobile phone's transmission power the better.
  • Figure 6 a plot of maximum transmit power versus time is provided. Wherein, the ordinate is the maximum transmission power of the mobile phone 100, and the abscissa is time.
  • the mobile phone 100 detects that the rising edge time of the second square wave signal is less than the preset rising edge time, and/or the capacitance of the antenna relative to the earth is less than the preset capacitance, and/or the distance between the antenna and the human body is greater than the preset.
  • the maximum transmission power of the mobile phone 100 is P2.
  • the mobile phone 100 detects that the rising edge time of the second square wave signal is greater than the preset rising edge time, and/or the capacitance of the antenna relative to the earth is greater than the preset capacitance, and/or the distance between the antenna and the human body is less than the preset.
  • handset 100 reduces the maximum transmit power to P1 to ensure that the electromagnetic radiation emitted by antenna 104 is safe to the human body, although the cellular network may require higher transmit power during the t1 to t2 time period.
  • the mobile phone 100 detects that the rising edge time of the second square wave signal is less than the preset rising edge time, and/or the capacitance of the antenna relative to the earth is less than the preset capacitance, and/or the distance between the antenna and the human body is greater than the pre- With the distance set, the mobile phone 100 restores the maximum transmit power to P2.
  • mobile phone 100 again The rising edge time of the second square wave signal is detected to be greater than the preset rising edge time, and/or the capacitance of the antenna relative to the earth is greater than the preset capacitance, and/or the distance between the antenna and the human body is less than the preset distance, and the mobile phone 100 Reduce the maximum transmit power to P1. It should be noted that the mobile phone 100 can also reduce the output power in response to the adjustment command of the cellular base station (not shown in FIG. 6).
  • the current position of the mobile phone 100 may also be determined by considering the location module or the location data provided by the user.
  • the mobile phone 100 determines the upper limit value of the SAR specified by the national or regional regulations of the current location, and further determines the switching scheme of the antenna working state according to the upper limit value of the SAR, and/or the maximum transmitting power of the mobile phone 100. For example, when it is determined that the mobile phone 100 is located in a country where the SAR is relatively large, the maximum transmission power of the mobile phone 100 can be relatively large as compared with a country that allows the SAR to be relatively small. In this way, according to the regulations of the SAR of the country or region to which the mobile phone 100 is located, the electromagnetic radiation intensity and/or the radiation direction of the mobile phone 100 can be more specifically adjusted.
  • the mobile phone 100 can also use the sensor to determine whether there is an object near the mobile phone 100.
  • the step of transmitting the first waveform signal to the antenna is further performed.
  • the first waveform signal is sent to the antenna by the processor, and the second waveform signal is received.
  • the second waveform signal is formed by the first waveform signal being reflected by the antenna; and the electromagnetic wave radiation intensity of the mobile terminal is adjusted according to the second waveform signal. Or a radiation direction, wherein the characteristics of the second waveform signal may reflect the distance between the human body and the antenna of the mobile phone 100.
  • the embodiment of the invention simplifies the implementation of adjusting the electromagnetic wave radiation parameters of the mobile terminal.
  • an embodiment of the present invention provides a method for adjusting electromagnetic wave radiation parameters of a mobile terminal.
  • the embodiment of the present invention uses a mobile phone as an example for exemplary description.
  • the mobile terminal is used as an example of a mobile phone, and the method for adjusting the electromagnetic wave radiation parameters of the mobile terminal is introduced in detail, including:
  • the mobile phone 100 transmits a first waveform signal to the antenna (step 702), receives a second waveform signal (step 703), the second waveform signal is formed by the first waveform signal being reflected by the antenna, and adjusting the electromagnetic wave radiation of the mobile phone 100 according to the second waveform signal.
  • Parameters for example, adjusting the electromagnetic radiation intensity and/or radiation direction of the handset 100.
  • the senor may be used to detect whether there is an object near the mobile phone 100 (step 701). When it is detected that there is an object near the mobile phone 100, step 702 is performed.
  • the received second waveform signal is formed by the first waveform signal being reflected by the antenna.
  • the antenna of the mobile phone 100 has capacitance relative to the ground, when the first waveform signal passes through the antenna.
  • the capacitor charging effect so the rising edge of the second waveform signal is more gradual with respect to the rising edge of the first waveform signal.
  • the capacitance of the antenna relative to the earth becomes larger, and the rising edge time of the second waveform signal becomes longer. The closer the distance between the antenna of the mobile phone and the human body, the larger the capacitance of the antenna relative to the earth, and the longer the rising edge of the second waveform signal, which will not be described here.
  • step 704 refer to the rising edge time of the second square wave signal, and/or the capacitance of the antenna relative to the earth, and/or the distance between the antenna and the human body, by switching the working state of the antenna. And/or adjusting the maximum transmit power of the mobile phone to achieve an embodiment and a beneficial effect of reducing or increasing the intensity of the electromagnetic wave radiation and/or adjusting the radiation direction, based on the same inventive concept, which will not be repeated herein.
  • the 704A refer to the implementation manner of switching the antenna, and/or switching the antenna matching circuit, and/or switching the working state of the switching device, which is implemented in the foregoing embodiment, to implement an operation state of switching the antenna;
  • the embodiment described above implements an embodiment of adjusting the maximum transmit power of the handset by adjusting the control voltage and/or supply voltage of the power amplifier, and/or by adjusting the gain of the power amplifier.
  • the country or region where the mobile phone 100 is located may be determined, the upper limit value of the SAR specified by the regulations of the country or region may be determined, and the switching scheme of the working state of the antenna may be further determined according to the upper limit value of the SAR, and/or the mobile phone Maximum transmit power.
  • step 701 reference may be made to the embodiment and the beneficial effects of using a sensor (such as a proximity sensor, an ambient light sensor, an accelerometer sensor, etc.) to assist in determining whether there is an object in the vicinity of the mobile phone 100, which is described in the above embodiments. I won't go into details here.
  • a sensor such as a proximity sensor, an ambient light sensor, an accelerometer sensor, etc.
  • an embodiment of the present invention further provides an apparatus.
  • the apparatus includes a transmitting unit 801, a receiving unit 802, and a processing unit 803.
  • the sending unit 801 is configured to send a first waveform signal to an antenna.
  • the first waveform signal may be a rectangular wave, a sawtooth wave, a square wave, a triangular wave, or a sine wave signal.
  • the receiving unit 802 is configured to receive a second waveform signal, where the second waveform signal is formed by the first waveform signal being reflected by the antenna.
  • the second waveform signal is formed by the first waveform signal being reflected by the antenna.
  • the processing unit 803 is configured to adjust an electromagnetic wave radiation intensity and/or a radiation direction of the device according to the second waveform signal.
  • the beneficial effects of the processing unit refer to the rising edge time according to the second square wave signal introduced in the above embodiment, and/or the capacitance of the antenna relative to the earth, and/or the distance between the antenna and the human body.
  • Embodiments and advantageous effects of reducing or increasing the intensity of electromagnetic wave radiation and/or adjusting the radiation direction are realized by switching the operating state of the antenna and/or adjusting the maximum transmission power of the mobile phone. Based on the same inventive concept, details are not described herein again.
  • the processing unit 803 may further include a determining subunit 8031 and a processing subunit 8032.
  • Determining the implementation of the sub-unit 8031 and the beneficial effects can be referred to the embodiment of the above embodiment to determine the rising edge time according to the second waveform signal, and/or the capacitance of the antenna relative to the earth, and/or the distance between the antenna and the human body. And the beneficial effects are based on the same inventive concept, and are not described herein again.
  • Embodiments of the processing sub-unit 8032 and the beneficial effects can be adjusted according to the rising edge time, and/or the capacitance of the antenna relative to the earth, and/or the distance between the antenna and the human body, and/or the electromagnetic radiation intensity and/or
  • the embodiment of the radiation direction and the beneficial effects are based on the same inventive concept and will not be described herein.
  • the processing subunit may also include an antenna subunit 80321 and a power control subunit 80322.
  • the antenna sub-unit 80321 is configured to switch the working state of the antenna according to the rising edge time, and/or the capacitance of the antenna relative to the earth, and/or the distance between the antenna and the human body.
  • the rising edge time of the second square wave signal is greater than the preset rising edge time
  • the capacitance of the antenna relative to the ground is greater than the preset capacitance, and/or the antenna and the human body.
  • the antenna When the distance between the distances is less than the preset distance, the antenna is switched from the first antenna radiation to the second antenna radiation; and/or the antenna matching circuit is switched from the first matching circuit to the second matching circuit; and/or the switching device is switched
  • the working state is such that the main antenna is connected to the reserved line; the electromagnetic radiation intensity of the mobile phone 100 is reduced and/or the electromagnetic wave radiation direction of the mobile phone 100 is adjusted to reduce the influence of the electromagnetic wave radiation of the mobile phone 100 on the human body.
  • the antenna is switched from the second antenna radiation to the first antenna radiation; and/or the antenna matching circuit is switched from the second matching circuit to the first matching circuit; and/or the switching device is operated.
  • the main antenna is disconnected from the reserved trace to increase the electromagnetic radiation intensity of the mobile phone 100 and/or adjust the radiation direction to improve the radio frequency performance of the mobile phone 100.
  • the antenna is switched from the first antenna radiation to the second antenna radiation; and/or the antenna matching circuit is switched from the first matching circuit to the second matching circuit; and/or the switching device is operated.
  • the main antenna is connected to the reserved line, and the details are not repeated here; based on the same inventive concept, details are not described herein again.
  • the power control sub-unit 80322 is configured to: adjust the maximum transmit power of the device according to the rising edge time, and/or the capacitance of the antenna relative to the earth, and/or the distance between the antenna and the human body, and implement the adjustment device.
  • the electromagnetic radiation intensity of the electromagnetic wave For the implementation of the power control sub-unit, refer to the embodiment of the invention, by adjusting the control voltage and/or the power supply voltage of the power amplifier, and/or adjusting the gain of the power amplifier, to implement an adjustment of the electromagnetic radiation intensity. I will not repeat them here.
  • the apparatus provided by the embodiment of the present invention may further include a determining unit 804, configured to determine whether an object is in proximity; when it is determined by the determining unit 804 that an object is approaching, the first waveform signal is sent to the antenna by the sending unit 801. .
  • a determining unit 804 configured to determine whether an object is in proximity; when it is determined by the determining unit 804 that an object is approaching, the first waveform signal is sent to the antenna by the sending unit 801. .
  • the determining unit 804 refer to the implementation of detecting the infrared reflected light, the ambient light, and/or the magnitude of the acceleration to detect whether an object is approaching the device, which is described in the above embodiment. .
  • the apparatus provided by the embodiment of the present invention may further include a positioning unit 805, configured to determine a location where the device is located, and the processing unit 803 performs an adjustment of the electromagnetic wave radiation intensity and/or the radiation direction according to the position determined by the positioning device, and the implementation manner.
  • a positioning unit 805 configured to determine a location where the device is located
  • the processing unit 803 performs an adjustment of the electromagnetic wave radiation intensity and/or the radiation direction according to the position determined by the positioning device, and the implementation manner.
  • the beneficial effects refer to the implementation manner and the beneficial effects of determining the location of the mobile phone 100 by using the positioning module, which are described in the foregoing embodiments, based on the same inventive concept, and details are not described herein again.
  • the capacitance may represent the capacitance of the mobile terminal antenna relative to the earth, and may also represent the capacitance value of the mobile terminal antenna relative to the earth.
  • FIG. Processing of these computer program instructions to a general purpose computer, a special purpose computer, an embedded processor, or other programmable data processing device To generate a machine such that instructions executed by a processor of a computer or other programmable data processing device generate functions for implementing the functions specified in one or more blocks of a flow or a flow diagram and a block diagram of a flowchart. Device.

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Abstract

一种移动终端，所述移动终端包括：处理器、存储器、天线；所述处理器用于执行存储在存储器中的指令，向所述天线发送第一波形信号，接收第二波形信号，所述第二波形信号为所述第一波形信号经所述天线反射形成，根据所述第二波形信号，调整移动终端的电磁波辐射强度和/或辐射方向。本发明实施例通过可以反映物体与移动终端之间距离的第二波形信号，调整移动终端的电磁波辐射强度和/或辐射方向，降低了设计成本。

Description

一种调整电磁波辐射参数的装置、方法以及存储介质 技术领域
本发明实施例涉及移动通讯技术领域，尤其涉及一种调整电磁波辐射参数的装置、方法以及存储介质。
背景技术
随着无线通信技术的飞速发展，移动终端得到广泛普及和应用。然而，由于在日常应用场景中，移动终端所辐射的电磁波对人体健康的影响越来越受到大家的关注。
通常，在国际上采用电磁波能量吸收比(Specific Absorption Rate，SAR)指标来衡量电磁波暴露环境下人体吸收的能量。由于移动终端(如；手机、平板电脑等)在世界范围内的广泛普及，近年来，越来越多的国家政府部门、电信法规机构等要求将SAR降低至合适的水平。许多国家制定了相应的法规，通过限定移动终端SAR的上限，确保电磁辐射对人体的安全。明确规定了各种天线移动终端在与人体的相互作用时最大允许的吸收比率。
业界常用做法为在移动终端内增加sensor pad和电容检测芯片，当有人体接近sensor pad时，sensor pad和人体形成电容，通过专用的电容检测芯片检测sensor pad和人体形成的电容，根据检测到的电容确定人体距sensor pad的距离，当距离满足预设条件时，调整移动终端的电磁波辐射量以降低SAR。
但是，采用上述方案，虽然实现了调整移动终端的电磁波辐射量，但需要额外增加sensor pad和电容检测芯片，不仅需要更大的位置空间，且导致更高的设计成本，也无法满足移动终端小型化，轻薄化的需求。
发明内容
本发明实施例提供一种调整电磁波辐射参数的方案，简化了设计方案，降低了设计成本。
第一方面，提供一种移动终端，所述移动终端包括：处理器、存储器、天线；所述存储器用于存储计算机可执行程序代码，所述程序代码包括指令；所述处理器用于执行所述指令，实现：向所述天线发送第一波形信号；接收第二波形信号，所述第二波形信号为所述第一波形信号经所述天线反射形成；根据所述第二波形信号，调整所述移动终端的电磁波辐射强度和/或辐射方向。利用移动终端的处理器、存储器和天线部件，不需要额外增加检测部件，就可以实现调整所述移动终端的电磁波辐射强度和/或辐射方向，简化了实现方案，降低了设计成本。
在一种可能的设计中，所述处理器根据所述第二波形信号，调整所述移动终端的电磁波辐射强度和/或辐射方向；包括：所述处理器根据所述第二波形信号确定第一时间，所述第一时间为所述第二波形信号的上升沿时间；根据所述第一时间，调整所述移动终端的电磁波辐射强度和/或辐射方向；和/或所述处理器根据所述第二波形信号确定第一电容，所述第一电容为所述天线相对于大地的电容；根据所述第一电容，调整所述移动终端的电磁波辐射强度和/或辐射方向；和/或所述处理器根据所述第二波形信号确定人体与所述天线之间距离；根据人体与所述天线之间的距离，调整所述移动终端的电磁波辐射强度和/或辐射方向。即：当第二波形信号的上升沿时间大于预设上升沿时间，和/或天线相对于大地的电容大于预设电容，和/或天线与人体之间的距离小于预设距离时，处理器可以降低移动终端的电磁波辐射强度和/或调整辐射方向远离人体，以降低移动终端的电磁波辐射对人体的影响；维持降低后的电磁波辐射强度和/或调整后的辐射方向，直至当第二方波信号的上升沿时间小于预设上升沿时间，和/或天线相对于大地的电容小于预设电容，和/或天线与人体之间的距离大于预设距离时，处理器可以增加移动终端的电磁波辐射强度和/或调整辐射方向，以提升移动终端的射频性能。第二方波信号的上升沿时间和天线相对于大帝的电容可以反映天线与人体之间的距离，这种设计方式实现了根据天线与人体之间的距离，适应性的调整移动终端的电磁波辐射量，同时兼顾当人体靠近天线时，降低电磁波辐射量对人体的影响，以及 当人体远离天线时，提升移动终端的射频性能。
在一种可能的设计中，所述第一波形信号为矩形波、锯齿波、方波、三角波、或正弦波信号。
在一种可能的设计中，所述处理器调整所述移动终端的电磁波辐射强度和/或辐射方向，包括：所述处理器切换所述天线的工作状态，其中：当所述天线的工作状态变化时，所述移动终端的电磁波辐射强度和/或辐射方向不同。通过切换天线的工作状态，实现了调整移动终端的电磁波辐射强度和/或辐射方向。
在一种可能的设计中，所述天线包括第一天线和第二天线；所述处理器切换所述天线的工作状态，包括：所述处理器将所述天线由所述第一天线辐射切换为所述第二天线辐射；所述第二天线的电磁波辐射强度与所述第一天线的电磁波辐射强度不同；和/或所述第二天线的电磁波辐射方向与所述第一天线的电磁波辐射方向不同。通过布置两个天线，当人体靠近天线时，选择对人体以及助听器设备具有较小的辐射的天线，降低电磁波辐射量对人体的影响；当人体远离天线时，选择射频性能较好的天线，以提升移动终端的射频性能。
在一种可能的设计中，所述移动终端还包括天线匹配电路；所述天线匹配电路与所述天线连接；所述天线匹配电路包括第一匹配电路和第二匹配电路；所述处理器切换所述天线的工作状态，包括：所述处理器将所述天线匹配电路由所述第一匹配电路切换为所述第二匹配电路；所述天线连接所述第二匹配电路时的电磁波辐射强度，与所述天线连接所述第一匹配电路时的电磁波辐射强度不同；和/或所述天线连接所述第二匹配电路时的电磁波辐射方向，与所述天线连接所述第一匹配电路时的电磁波辐射方向不同。通过布置两套天线匹配电路，当人体靠近天线时，选择与天线连接后对人体以及助听器设备具有较小的辐射的天线匹配电路，降低电磁波辐射量对人体的影响；当人体远离天线时，选择与天线连接后射频性能较好的天线匹配电路，以提升移动终端的射频性能。
在一种可能的设计中，所述天线包括主天线、开关器件以及预留走线；所述开关器件用于控制所述主天线与所述预留走线连接或断开；所述处理器切换所述天线的工作状态，包括：所述处理器切换所述开关器件的工作状态，使所述主天线与所述预留走线连接，构成新天线；所述新天线的电磁波辐射强度与所述主天线的电磁波辐射强度不同；和/或所述新天线的电磁波辐射方向与所述主天线的电磁波辐射方向不同。通过开关器件切换主天线或新天线，当人体靠近天线时，选择对人体以及助听器设备具有较小的辐射的天线，降低电磁波辐射量对人体的影响；当人体远离天线时，选择射频性能较好的天线，以提升移动终端的射频性能。
在一种可能的设计中，所述移动终端还包括功率放大器；所述处理器调整所述移动终端的电磁波辐射强度，包括：所述处理器调整所述功率放大器的控制电压和/或电源电压，其中：当所述功率放大器的控制电压和/或电源电压变化时，所述移动终端的电磁波辐射强度不同；和/或所述处理器调整所述功率放大器的增益，其中：当所述功率放大器的增益变化时，所述移动终端的电磁波辐射强度不同。当人体靠近天线时，调整所述功率放大器的控制电压和/或电源电压，和/或增加所述功率放大器的增益，以降低电磁波辐射量对人体的影响；当人体远离天线时，调整所述功率放大器的控制电压和/或电源电压，和/或降低所述功率放大器的增益，以提升移动终端的射频性能。
在一种可能的设计中，所述处理器根据所述第二波形信号，调整所述移动终端的电磁波辐射强度；包括：所述处理器根据所述第二波形信号，降低所述移动终端的电磁波辐射强度；和/或，所述处理器根据所述第二波形信号，增加所述移动终端的电磁波辐射强度。根据天线与人体的距离，适应性的降低或增加移动终端的电磁波辐射强度。
在一种可能的设计中，所述移动终端还包括传感器；所述传感器包括接近传感器、环境光传感器、和/或加速计传感器；所述处理器接收所处传感器发送的传感数据；当所述处理器根据所述传感数据确定所述移动终端接近人体时，向所述天线发送第一波形信号。这样提升了根据天线与人体之间距离 调整移动终端的电磁波辐射强度的准确性，此外，当根据所述传感数据确定移动终端未接近人体时，可以不向天线发送第一波形信号，节省了移动终端的功耗。
在一种可能的设计中，所述移动终端还包括定位模块，所述定位模块用于确定所述移动终端所处的位置；移动终端根据当前位置所属国家或地区法规所规定的SAR的上限值，进一步根据SAR的上限值，确定天线工作状态的切换方案，和/或手机的最大发射功率。这样，根据移动终端所处位置所属的国家或地区的法规对SAR的规定，可以更有针对性的调整移动终端的电磁波辐射强度和/或辐射方向。
第二方面，提供一种调整移动终端的电磁波辐射参数的方法，应用于移动终端，所述移动终端包括天线，所述方法包括：所述移动终端向所述天线发送第一波形信号；接收第二波形信号，所述第二波形信号为所述第一波形信号经所述天线反射形成；根据所述第二波形信号，调整所述移动终端的电磁波辐射强度和/或辐射方向。基于同一发明构思，由于该方法解决问题的原理以及有益效果可以参见上述第一方面和第一方面的各可能的移动终端的实施方式以及所带来的有益效果，因此该方法的实施可以参见上述第一方面和第一方面的移动终端各可能的实施方式，重复之处不再赘述。
第三方面，提供一种装置，所述装置包括发送单元、接收单元和处理单元：所述发送单元，用于向天线发送第一波形信号；所述接收单元，用于接收第二波形信号，所述第二波形信号为所述第一波形信号经所述天线反射形成；所述处理单元，用于根据所述第二波形信号，调整所述装置的电磁波辐射强度和/或辐射方向。基于同一发明构思，由于该装置解决问题的原理以及有益效果可以参见上述第一方面和第一方面的各可能的移动终端的实施方式以及所带来的有益效果，因此该装置的实施可以参见上述第一方面和第一方面的各可能的移动终端的实施方式，重复之处不再赘述。
第四方面，提供一种存储介质，所述存储介质为非易失性计算机可读存储介质，所述非易失性计算机可读存储介质存储有至少一个程序，每个所述 程序包括指令，所述指令当被具有处理器、天线的移动终端执行时使所述移动终端执行上述第二方面和第二方面的各可能的方法设计。
本发明实施例提供的方案，简化了根据天线与人体之间的距离，调整电磁波辐射强度和/或辐射方向的实现方案，降低了设计成本。
附图说明
图1为移动终端位于人体附近的示意图；
图2为本发明实施例中手机100的部分结构框图；
图3为本发明实施例中天线对地的电容相对于天线与人体距离变化的示意图；
图4为本发明实施例中第二波形上升沿时间随天线与人体距离变化的示意图；
图5为本发明实施例中手机100的功能结构图；
图6为本发明实施例中手机100的最大发射功率与时间的曲线图；
图7为本发明实施例提供的调整手机的电磁波辐射强度和/或辐射方向的方法流程图；
图8为本发明实施例提供的装置结构图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行详细地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。
鉴于当前业界需要检测人体与移动终端之间距离，根据检测到的距离调整移动终端的发射功率，且当前业界检测人体与移动终端之间距离的方案需要增加专用的检测芯片，增加设计成本，且增加PCB的布板面积。本发明实施例通过移动终端向天线发送第一波形信号；接收第二波形信号，所述第二波 形信号为所述第一波形信号经所述天线反射形成；根据所述第二波形信号，调整所述移动终端的电磁波辐射参数，具体为调整移动终端的电磁波辐射强度和/或辐射方向。第二波形信号可以反映人体与移动终端的距离。当第二波形信号反映人体与移动终端的距离小于距离阈值时，根据第二波形信号降低移动终端的电磁波辐射强度和/或调整辐射方向，以降低移动终端的电磁波辐射对人体的影响。维持调整后的电磁波辐射参数，直至当第二波形信号反映人体与移动终端的距离大于距离阈值时，根据第二波形信号增加移动终端的电磁波辐射强度和/或调整辐射方向，以提升移动终端的射频性能。因此本发明实施例的方案能够解决现有技术的问题，即无需增加专用的检测芯片，即可调整所述移动终端的电磁波辐射参数，实现当人体接近移动终端时降低SAR，当人体远离移动终端时提升移动终端的射频性能。
SAR为电磁波吸收比值或比吸收率。是移动终端或无线产品的电磁波能量吸收比值。由于人体各种器官均为导电介质，因此会吸收和耗散电磁能量。SAR为单位质量的人体组织吸收的电磁功率，可以衡量移动终端产品电磁能量对人体的影响。SAR的单位是W/Kg(瓦/公斤)。SAR越大，表示移动终端产品电磁能量对人体的影响越大；反之则影响越小。
当移动终端接近人体，如：图1示意的移动终端位于用户头部右侧、头部左侧、单手握、双手握时，会通过人体头部以及人手吸收移动终端产生的电磁能量。
本发明实施例适用于移动终端。在一些实施例中，该移动终端可以是例如手机的便携式移动终端，也可以是平板电脑、PDA(Personal Digital Assistant，个人数字助理)、POS(Point of Sales，销售终端)、车载电脑等具有移动通信功能的通信装置。为了便于说明，本发明实施例以手机为例进行示例性说明。
图2示出的是本发明实施例提供的手机100的部分结构的框图。参考图2，手机100可以包括壳体105(如图1所示)、显示屏140、存储器120、处理器180、天线104、射频电路110、定位模块195、传感器150、其他输入设备130、I/O子***170、音频电路160、电源190、等部件。本领域技术人员可以理解， 图2中示出的手机结构并不构成对手机的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。
手机100可以具有壳体105。用于处理无线通信的天线可被容纳在壳体105内。壳体105，也可被称为机壳，可由任意适合的材料形成。包括塑料、玻璃、陶瓷、金属、或其它适合材料、或这些材料的组合。在一些实施方式中，壳体105或壳体105的若干部分可由电介质或其它低导电性材料形成；从而不会干扰位于壳体105附近的导电天线元件的工作。壳体105或壳体105的若干部分还可由导电材料(例如金属)形成。由金属元件形成壳体105的情况，一个或多个金属元件可被用作手机100中的天线的一部分。
显示屏140可用于显示由用户输入的信息或提供给用户的信息以及手机100的各种菜单，还可以接受用户输入。具体的显示屏140可包括显示面板141，以及触控面板142。其中显示面板141可以采用LCD(Liquid Crystal Display，液晶显示器)、OLED(Organic Light-Emitting Diode，有机发光二极管)等形式来配置显示面板141。触控面板142，也称为触摸屏、触敏屏等，可收集用户在其上或附近的接触或者非接触操作(比如用户使用手指、触笔等任何适合的物体或附近在触控面板142上或在触控面板142附近的操作，也可以包括体感操作；该操作包括单点控制操作、多点控制操作等操作类型。)，并根据预先设定的程式驱动相应的连接装置。可选的，触控面板142可包括触摸检测装置和触摸控制器两个部分。其中，触摸检测装置检测用户的触摸方位、姿势，并检测触摸操作带来的信号，将信号传送给触摸控制器；触摸控制器从触摸检测装置上接收触摸信息，并将它转换成处理器能够处理的信息，再送给处理器180，并能接收处理器180发来的命令并加以执行。此外，可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触控面板142，也可以采用未来发展的任何技术实现触控面板142。进一步的，触控面板142可覆盖显示面板141，用户可以根据显示面板141显示的内容(该显示内容包括但不限于，软键盘、虚拟鼠标、虚拟按键、图标等等)，在显示面板141上 覆盖的触控面板142上或者附近进行操作，触控面板142检测到在其上或附近的操作后，通过I/O子***170传送给处理器180以确定用户输入，随后处理器180根据用户输入通过I/O子***170在显示面板141上提供相应的视觉输出。虽然在图1中，触控面板142与显示面板141是作为两个独立的部件来实现手机100的输入和输入功能，但是在某些实施例中，可以将触控面板142与显示面板141集成而实现手机100的输入和输出功能。
手机100还可以包括存储器120，用于存储计算机可执行程序代码，所述程序代码包括指令。处理器180通过运行存储在存储器120的指令，从而执行手机100的各种功能应用以及数据处理。存储器120可主要包括存储程序区和存储数据区。其中，存储程序区可存储操作***、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等。存储数据区可存储根据手机100的使用所创建的数据(比如音频数据、电话本等)等。此外，存储器120可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
手机100还可以包括处理器180。处理器180是手机100的控制中心。利用各种接口和线路连接整个手机的各个部分。通过运行或执行存储在存储器120内的软件程序和/或模块，以及调用存储在存储器120内的数据，执行手机100的各种功能和处理数据，从而对手机进行整体监控。可选的，处理器180可包括一个或多个处理单元。处理器180可集成应用处理器、调制解调处理器，基带模块、功率管理芯片、存储器、编解码器等。其中，应用处理器主要处理操作***、用户界面和应用程序等。调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器180中。可以使用处理器180和存储器120实现互联网协议、无线局域网协议(例如，IEEE702.11)、3G、4G、5G通信协议等。
手机100还可以包括天线104，用于发射、接收射频信号。天线104可以位于手机100中的任意位置。本发明实施例示意的天线的位置仅是示例性说 明。手机100可以具有一个或多个天线。手机100中的每个天线可用于覆盖单个或多个通信频带。
手机100还包括射频电路110。用于在收发信息或通话过程中，信号的接收和发送。例如，接收基站的下行信息后，发送给处理器180处理。另外，将上行的数据发送给基站。通常，射频电路110包括至少一个功率放大器109、收发器108、耦合器、LNA(Low Noise Amplifier，低噪声放大器)、双工器等。此外，射频电路110还可以通过无线通信与网络和其他设备通信。所述无线通信可以使用任一通信标准或协议，包括但不限于GSM(Global System of Mobile communication，全球移动通讯***)、GPRS(General Packet Radio Service，通用分组无线服务)、CDMA(Code Division Multiple Access，码分多址)、WCDMA(Wideband Code Division Multiple Access，宽带码分多址)、LTE(Long Term Evolution，长期演进)、电子邮件、SMS(Short Messaging Service，短消息服务)等。
手机100还可以包括功率放大器109，功率放大器用于放大要由手机100发射的射频信号。可以使用一个或多个集成电路中的一个或多个增益级来实现功率放大器109，如图2所示。可以理解的，可以有多个功率放大器109，每个功率放大器109与一个通信频带或一组通信频带相关联。为简化说明，图2以单个功率放大器109符号示意说明。
可选的，手机100还可以包括定位模块195。定位模块用于检测手机100的位置、方位等。手机100的位置或方位的检测可使用各种定位服务来执行，例如全球定位***(Global Positioning System，GPS)、辅助式GPS(Assisted GPS，A-GPS)、基于对已注册蜂窝式电话的蜂窝式电话基站三角测量或三边测量、伽利略定位***，或其它定位或位置服务或技术。可使用各种硬件、软件及其组合来检测手机100的位置或方位，例如GPS单元、加速计以及手机100中的其它定向和移动检测服务或技术。
手机100还可以包括传感器150，可以包括接近传感器、环境光传感器、加速计传感器等。其中，环境光传感器可根据环境光线的明暗来调节显示面板141的亮度，接近传感器可在手机100移动到耳边时，关闭显示面板141和/或背光。
接近传感器可以包括例如发光二极管(LED)和相关联的光检测器，例如光电二极管。发光二极管可以是红外发光二极管，通过发光二极管向外发射红外光11(如图5)。使用光电二极管检测来自附近物体的红外反射光12(如图5)。当检测到充分的反射光时，可以确定手机100附近有物体。当检测到不充分的反射光时，可以确定手机100附近没有物体。
环境光传感器可以是能够检测进入光13(如图5)的光电二极管或其它光传感器。环境光传感器可以工作于可见光谱和/或红外光谱。当环境光传感器未被物体遮挡，相对于当环境光传感器被物体遮挡时，环境光传感器一般将接收到更多的光13，因此可以使用环境光传感器产生接近性数据。该数据可以单独使用或与其它传感器的接近性数据结合使用，以便手机100更准确的确定手机附近有没有物体。
加速计传感器可检测各个方向上(一般为三轴)加速度的大小。当手机100静止时可检测出重力的大小及方向。加速计传感器可用于识别手机姿态的应用(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等。可以使用加速度计确定手机100是否在运动(可能被用户拿着)，或手机100是否正被用户握着，从而其左边缘或右边缘面朝下，或手机100是否正水平放置在桌面上。如果确定手机100是水平并且是静止的，可以确定手机100不太可能被握持。该数据可以与来自接近传感器的数据和其它数据组合，以辅助确定从手机100中的其它传感器获得的读数是否准确。
手机100可以并行处理来自多个传感器设备(例如，接近传感器、环境光传感器等)的信号，确定手机100附近是否有物体，提升了确定手机100与物体之间距离的准确性。
至于手机100还可配置的陀螺仪、气压计、湿度计、温度计、红外线传感器等其他传感器，在此不再赘述。
其他输入设备130可用于接收输入的数字或字符信息，以及产生与手机100的用户设置以及功能控制有关的键信号输入。具体地，其他输入设备130可包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆、光鼠(光鼠是不显示可视输出的触摸敏感表面，或者是由触摸屏形成的触摸敏感表面的延伸)等中的一种或多种。其他输入设备130与I/O子***170的其他输入设备控制器171相连接，在其他设备输入控制器171的控制下与处理器180进行信号交互。
音频电路160、扬声器161，麦克风162可提供用户与手机100之间的音频接口。音频电路160可将接收到的音频数据转换后的信号，传输到扬声器161，由扬声器161转换为声音信号输出。另一方面，麦克风162将收集的声音信号转换为信号，由音频电路160接收后转换为音频数据，再将音频数据输出至射频电路110以发送给比如另一手机，或者将音频数据输出至存储器120以便进一步处理。
I/O子***170用来控制输入输出的外部设备，可以包括其他设备输入控制器171、传感器控制器172、显示控制器173。可选的，一个或多个其他输入控制设备控制器171从其他输入设备130接收信号和/或者向其他输入设备130发送信号，其他输入设备130可以包括物理按钮(按压按钮、摇臂按钮等)、拨号盘、滑动开关、操纵杆、点击滚轮、光鼠(光鼠是不显示可视输出的触摸敏感表面，或者是由触摸屏形成的触摸敏感表面的延伸)。值得说明的是，其他输入控制设备控制器171可以与任一个或者多个上述设备连接。所述I/O子***170中的显示控制器173从显示屏140接收信号和/或者向显示屏140发送信号。显示屏140检测到用户输入后，显示控制器173将检测到的用户输入转换为与显示在显示屏140上的用户界面对象的交互，即实现人机交互。 传感器控制器172可以从一个或者多个传感器150接收信号和/或者向一个或者多个传感器150发送信号。
手机100还包括给各个部件供电的电源190(比如电池)。优选的，电源可以通过电源管理***与处理器180逻辑相连，从而通过电源管理***实现管理充电、放电、以及功耗等功能。
尽管未示出，手机100还可以包括摄像头、蓝牙模块等，在此不再赘述。
当手机100接近人体时，天线104将接近人体，因此很可能在人体附近发射射频信号。为了确保天线104发射的电磁辐射对人体的安全，当确定手机100处于人体附近时，手机100可以调整电磁波辐射参数，例如降低手机的电磁波辐射强度和/或调整电磁波的辐射方向，以降低电磁波辐射对人体的影响。当确定手机100远离人体时，手机100可以调整电磁波辐射参数，例如增加手机的电磁波辐射强度和/或调整电磁波的辐射方向，以提升手机100的射频性能。
由于手机100的天线相对于大地存在电容，当人体接近手机100天线时，天线相对于大地的电容会增大。天线相对于大地的电容的变化，可以反映人体与天线之间的距离变化。当人体相对天线的距离从远到近时，天线相对于大地的电容逐渐变大，如图3示意，C1大于C1。
本发明实施例可以通过手机100的处理器180向天线发送第一波形信号；接收第二波形信号，所述第二波形信号为所述第一波形信号经所述天线反射形成，根据第二波形信号，调整手机100的电磁波辐射参数。
其中，第一波形信号可以为矩形波、锯齿波、方波、三角波、或正弦波等波形信号。本发明实施例以处理器向天线发送方波信号为例，如图4所示。第一方波信号经天线反射形成第二方波信号，天线将第二方波信号发射至处 理器。当第一方波信号经天线时，由于天线相对于大地的电容吸收能量储能，即：电容充电效应，因此第二方波信号的上升沿相对于第一方波信号的上升沿更平缓，类似梯形，如图4虚线所示意的波形。天线相对于大地的电容与人体和天线之间的距离成反比，即：人体和天线之间的距离越小，天线相对于大地的电容越大；人体和天线之间的距离越大，天线相对于大地的电容越小。天线相对于大地的电容C1容量越大，第二方波信号的上升沿越平缓。即：电容所吸收的能量越多，充电时间越长。如图4虚线所示意的，t1＜t2。t1为人体和天线之间的距离相对远，即：天线相对于大地的电容较小时，天线相对于大地的电容的充电时间的示例。t2为人体和天线之间的距离相对近，即：天线相对于大地的电容较大时，天线相对于大地的电容的充电时间的示例。处理器可以根据第二方波信号，调整手机100的电磁波辐射参数，例如：调整手机100的电磁波辐射强度和/或辐射方向。关于处理器如何根据第二方波信号，调整手机100的电磁波辐射参数，后面章节将详细介绍。
假设处理器与天线之间的路径阻抗为R，天线相对于大地的电容为C1。如图4，利用R以及C1构成RC振荡电路。假设第一方波信号的振幅为Vin，电容充电后的电压为Vout；电容充电时间，即：第二方波信号的上升沿时间为t。根据指数关系Vout＝Vin×(1-e-t÷(R×C1))，假设当电容器上的电压达到最大值Vin×(1-1/e)，即0.63倍Vin时，t＝R×C，即：t为该电路的时间常数。由于路径阻抗R为固定值，本领域技术人员可以通过有限次仿真或测试获得阻抗R的值。处理器可以通过分析第二方波信号，确定第二方波信号的上升沿时间。即：电容充电时间t。因此根据t＝R×C1，可以通过第二方波信号的上升沿时间确定天线相对于大地的电容C1。
本领域技术人员可以理解的，天线相对于大地的电容与人体和天线之间的距离成反比。即：人体和天线之间的距离越小，天线相对于大地的电容越大；人体和天线之间的距离越大，天线相对于大地的电容越小。电容越大，电容充电时间越长；电容越小，电容充电时间越短。本领域技术人员可以通 过有限次实验或计算获得天线相对于大地的电容与电容的充电时间的对应关系，和/或天线相对于大地的电容与人体和天线之间的距离的对应关系，和/或电容的充电时间与人体和天线之间的距离的对应关系，如表1示意。以上对应关系可以预先存储在存储器120中。例如：当确定天线相对于大地的电容的充电时间，和/或天线相对于大地的电容后，可以通过查找存储在存储器120中的对应关系，确定人体和天线之间的距离。
Figure PCTCN2016113989-appb-000001
表1
在本发明实施例中，可以根据第二方波信号的上升沿时间确定天线相对于大地的电容，也可以根据第二方波信号的上升沿时间和/或天线相对于大地的电容确定人体与天线之间的距离，反之亦然。因此，第二方波信号的上升沿时间，和/或天线相对于大地的电容，可以间接反映人体与天线之间的距离，反之亦然。
作为一种可选的实施方式，当第二方波信号的上升沿时间大于预设上升沿时间，和/或天线相对于大地的电容大于预设电容，和/或天线与人体之间的距离小于预设距离时，手机100可以降低手机100的电磁波辐射强度和/或调整辐射方向远离人体，以降低手机100的电磁波辐射对人体的影响；维持降低后的手机100的电磁波辐射强度和/或调整后的辐射方向，直至当第二方波信号的上升沿时间小于预设上升沿时间，和/或天线相对于大地的电容小于预设电容，和/或天线与人体之间的距离大于预设距离时，手机100可以增加手机100的电磁波辐射强度和/或调整辐射方向，以提升手机100的射频性能； 维持增加后的手机100的电磁波辐射强度和/或调整后的辐射方向，直至当第二方波信号的上升沿时间大于预设上升沿时间，和/或天线相对于大地的电容大于预设电容，和/或天线与人体之间的距离小于预设距离时，手机100可以降低手机100的电磁波辐射强度和/或调整辐射方向远离人体，如此反复，在此不再赘述。需要说明的是，手机100可以还可以响应于蜂窝基站的调整命令调整电磁波辐射参数，本发明对此不作限制。
可以将第二方波信号的上升沿时间(天线相对于大地的电容的充电时间)与预设上升沿时间(预设充电时间)比较，确定第二方波信号的上升沿时间(天线相对于大地的电容的充电时间)大于或小于预设上升沿时间。当第二方波信号的上升沿时间大于预设上升沿时间时，反映的是人体与天线之间的距离小于预设距离。当第二方波信号的上升沿时间小于预设上升沿时间时，反映的是人体与天线之间的距离大于预设距离。
可以将天线相对于大地的电容与预设电容比较，确定天线相对于大地的电容大于或小于预设电容。当天线相对于大地的电容大于预设电容时，反映的是人体与天线之间的距离小于预设距离。当天线相对于大地的电容小于预设电容时，反映的是人体与天线之间的距离大于预设距离。
可以将天线与人体之间的距离与预设距离比较，确定天线与人体之间的距离大于或小于预设距离。
本发明实施例中用于向天线发射第一波形信号，接收第二波形信号的处理器可以为应用处理器、触摸屏控制器、以及其他微处理器，本发明实施例对此不做具体限定。
由于天线用于发射或接收射频信号，射频信号的频率较高。为了避免高频信号反射至处理器而干扰处理器确定天线相对于大地的电容，或天线与人体之间的距离的准确性，可以在处理器与天线之间设置低通滤波器，用于阻止高频信号由天线反射至处理器，允许频率较低的第一方波信号以及第二方 波信号通过。还可以在处理器与天线之间设置防静电保护器件(未示出)，例如；TVS防静电管，防止由天线引入的电磁信号损坏处理器。
本发明实施例可以根据以上实施例确定的第二方波信号，通过切换天线的工作状态，和/或调整手机100的最大发射功率，实现调整手机100的电磁波辐射强度和/或辐射方向。
以下介绍通过切换天线的工作状态实现调整手机100的电磁波辐射强度和/或辐射方向：
示例性的，天线可以包括第一天线和第二天线。切换天线的工作状态，包括将所述天线由所述第一天线辐射切换为所述第二天线辐射，以实现调整手机100的电磁波辐射强度和/或辐射方向。其中，第二天线的电磁波辐射强度与所述第一天线的电磁波辐射强度不同；和/或所述第二天线的电磁波辐射方向与所述第一天线的电磁波辐射方向不同。例如，第二天线的电磁波辐射强度比第一天线的电磁波辐射强度小，和/或第二天线的辐射方向相对于第一天线的辐射方向更远离人体，即：第二天线与第一天线相比，对人体以及助听器设备具有较小的辐射。示例性的，第一天线可以为全向辐射天线，其辐射方向是全向的。第二天线可以为单向辐射天线，辐射方向更远离人体。第二天线对人体以及助听器设备具有较小的辐射。
作为一种可选的实施方式，根据第二方波信号，切换天线的工作状态，包括：当第二方波信号的上升沿时间大于预设上升沿时间，和/或天线相对于大地的电容大于预设电容，和/或天线与人体之间的距离小于预设距离时，将所述天线由所述第一天线辐射切换为所述第二天线辐射，实现降低手机100的电磁波辐射强度和/或调整手机100的电磁波辐射方向，以降低手机100的电磁波辐射对人体的影响。由第一天线辐射切换为第二天线辐射之后维持使用第 二天线辐射，直至当第二方波信号的上升沿时间小于预设上升沿时间，和/或天线相对于大地的电容小于预设电容，和/或天线与人体之间的距离大于预设距离时，将所述天线由第二天线辐射切换为第一天线辐射，以增加手机100的电磁波辐射强度和/或调整辐射方向，以提升手机100的射频性能。由第二天线辐射切换为第一天线辐射之后维持使用第一天线辐射，直至当第二方波信号的上升沿时间大于预设上升沿时间，和/或天线相对于大地的电容大于预设电容，和/或天线与人体之间的距离小于预设距离时，将所述天线由所述第一天线辐射切换为所述第二天线辐射，如此反复，在此不再赘述。
可选的，手机100还可以包括天线匹配电路；天线匹配电路与天线连接；天线匹配电路可以包括第一匹配电路和第二匹配电路。切换天线的工作状态，包括将天线匹配电路由第一匹配电路切换为第二匹配电路，以实现调整手机100的电磁波辐射强度和/或辐射方向。其中，天线连接第二匹配电路时的电磁波辐射强度，与天线连接第一匹配电路时的电磁波辐射强度不同；和/或天线连接第二匹配电路时的电磁波辐射方向，与天线连接第一匹配电路时的电磁波辐射方向不同。例如：天线连接第二匹配电路时的电磁波辐射强度，比天线连接第一匹配电路时的电磁波辐射强度小，和/或天线连接第二匹配电路与天线连接第一匹配电路相比，辐射方向更远离人体。即：天线连接第二匹配电路，与天线连接第一匹配电路相比，对人体以及助听器设备具有较小的辐射。
作为一种可选的实施方式，根据第二方波信号，切换天线的工作状态，还包括：当第二方波信号的上升沿时间大于预设上升沿时间，和/或天线相对于大地的电容大于预设电容，和/或天线与人体之间的距离小于预设距离时，将天线匹配电路由第一匹配电路切换为第二匹配电路，实现降低手机100的电磁波辐射强度和/或调整手机100的电磁波辐射方向，以降低手机100的电磁波辐射对人体的影响。由第一匹配电路切换为第二匹配电路之后维持使用第二匹配电路，直至当第二方波信号的上升沿时间小于预设上升沿时间，和/或天 线相对于大地的电容小于预设电容，和/或天线与人体之间的距离大于预设距离时，将天线匹配电路由第二匹配电路切换为第一匹配电路，以增加手机100的电磁波辐射强度和/或调整辐射方向，以提升手机100的射频性能。由第二匹配电路切换为第一匹配电路之后维持使用第一匹配电路，直至当第二方波信号的上升沿时间大于预设上升沿时间，和/或天线相对于大地的电容大于预设电容，和/或天线与人体之间的距离小于预设距离时，将天线匹配电路由第一匹配电路切换为第二匹配电路，如此反复，在此不再赘述。
可选的，天线包括主天线、开关器件以及预留走线；开关器件用于控制所述主天线与所述预留走线连接或断开。切换所述天线的工作状态，包括切换开关器件的工作状态，使主天线与预留走线连接或断开，以实现调整手机100的电磁波辐射强度和/或辐射方向。当主天线与预留走线连接时，构成新天线；新天线的电磁波辐射强度与主天线的电磁波辐射强度不同；和/或新天线的电磁波辐射方向与主天线的电磁波辐射方向不同。例如：新天线的电磁波辐射强度比主天线的电磁波辐射强度小，和/或新天线的辐射方向与主天线的辐射方向比，更远离人体，即：新天线与主天线相比，对人体以及助听器设备具有较小的辐射。示例性的，主天线可以为全向辐射天线，其辐射方向性是全向的；新天线可以为单向辐射天线，辐射方向更远离人体。新天线与主天线相比，对人体以及助听器设备具有较小的辐射。
作为一种可选的实施方式，根据第二方波信号，切换天线的工作状态，还包括：当第二方波信号的上升沿时间大于预设上升沿时间，和/或天线相对于大地的电容大于预设电容，和/或天线与人体之间的距离小于预设距离时，切换开关器件的工作状态，使主天线与预留走线连接，构成新天线，使用新天线辐射，实现降低手机100的电磁波辐射强度和/或调整手机100的电磁波辐射方向，以降低手机100的电磁波辐射对人体的影响。主天线与预留走线连接，构成新天线之后维持使用新天线辐射，直至当第二方波信号的上升沿时间小于预设上升沿时间，和/或天线相对于大地的电容小于预设电容，和/或天线与人体之间的距离大于预设距离时，切换开关器件的工作状态，使主天线与预 留走线断开，使用主天线辐射，以增加手机100的电磁波辐射强度和/或调整辐射方向，以提升手机100的射频性能。主天线与预留走线断开之后维持使用主天线辐射，直至当第二方波信号的上升沿时间大于预设上升沿时间，和/或天线相对于大地的电容大于预设电容，和/或天线与人体之间的距离小于预设距离时，切换开关器件的工作状态，使主天线与预留走线连接，构成新天线，使用新天线辐射，如此反复，在此不再赘述。
本发明实施例还可以根据第二方波信号，通过调整手机100的最大发射功率，实现调整手机100的电磁波辐射强度和/或辐射方向。以下介绍通过调整手机100的最大发射功率调整手机100的电磁波辐射强度：
如图5所示，处理器可以通过控制路径(例如：控制路径20)控制功率放大器109的增益。控制路径20可用于处理模拟和/或数字控制信号。可以通过控制功率放大器109的控制电压和/或电源电压的大小，实现控制功率放大器109的增益。还可以通过打开或关闭功率放大器109中的部分增益级，实现控制功率放大器109的增益，以实现调整手机100的电磁波辐射强度。
作为一种可选的实施方式，根据第二方波信号，调整手机100的最大发射功率，包括：当第二方波信号的上升沿时间大于预设上升沿时间，和/或天线相对于大地的电容大于预设电容，和/或天线与人体之间的距离小于预设距离时，降低功率放大器109的控制电压和/或电源电压，和/或关闭功率放大器109中的部分增益级，实现降低手机100的电磁波辐射强度，以降低手机100的电磁波辐射对人体的影响。维持降低后的功率放大器109的控制电压和/或电源电压，和/或维持功率放大器109中的部分增益级的关闭状态，直至当第二方波信号的上升沿时间小于预设上升沿时间，和/或天线相对于大地的电容小于预设电容，和/或天线与人体之间的距离大于预设距离时，升高功率放大器109的控制电压和/或电源电压，和/或打开功率放大器109中的部分增益级，以提升手机100的 射频性能。维持升高后的功率放大器109的控制电压和/或电源电压，和/或维持功率放大器109中的部分增益级的开启状态，直至当第二方波信号的上升沿时间大于预设上升沿时间，和/或天线相对于大地的电容大于预设电容，和/或天线与人体之间的距离小于预设距离时，降低功率放大器109的控制电压和/或电源电压，和/或关闭功率放大器109中的部分增益级，如此反复，在此不再赘述。
当手机位于小区的远端时，手机所发射的射频信号要经过长距离传输路径到达基站；当手机被建筑物或其它遮挡，在无线阴影区内，射频信号必须经过多次的反射、折射及长距离传输的衰减；射频信号还要受其他信道的干扰，如：邻信道、同信道干扰等，因此，手机的发射功率要足够高，以克服上述无线电波传播路径的损耗，反射、折射的衰减，以及其他无线电波的干扰。同时为了减小对其他设备的干扰，辐射以及耗电量，手机的发射功率要尽可能低。因此，手机需要发出足够大的射频功率，以保证通信质量，同时，由于手机发射功率越大，在人体内形成的电场强度越高，人体吸收的射频辐射功率则越大，因此在保证通信质量的前提下，手机发射功率越小越好。如图6所示，提供了一种最大发射功率与时间的曲线图。其中，纵坐标为手机100的最大发射功率，横坐标为时间。t0时刻，手机100检测到第二方波信号的上升沿时间小于预设上升沿时间，和/或天线相对于大地的电容小于预设电容，和/或天线与人体之间的距离大于预设距离，手机100的最大发射功率为P2。t1时刻，手机100检测到第二方波信号的上升沿时间大于预设上升沿时间，和/或天线相对于大地的电容大于预设电容，和/或天线与人体之间的距离小于预设距离，手机100将最大发射功率降低到P1，以确保天线104发射的电磁辐射对人体的安全，尽管蜂窝网络在t1到t2时间段内可能需要更高的发射功率。在t2时刻，手机100检测到第二方波信号的上升沿时间小于预设上升沿时间，和/或天线相对于大地的电容小于预设电容，和/或天线与人体之间的距离大于预设距离，手机100将最大发射功率恢复至P2。t3时刻，手机100再 次检测到第二方波信号的上升沿时间大于预设上升沿时间，和/或天线相对于大地的电容大于预设电容，和/或天线与人体之间的距离小于预设距离，手机100将最大发射功率降低到P1。需要说明的是，手机100还可以响应于蜂窝基站的调整命令，减小输出功率(图6未示出)。
作为一种可选的实施方式，当调整手机100的电磁波辐射强度和/或辐射方向时，还可以考虑定位模块或用户提供的位置数据，确定手机100的当前位置。手机100确定当前位置所属国家或地区法规所规定的SAR的上限值，根据SAR的上限值，进一步确定天线工作状态的切换方案，和/或手机100的最大发射功率。例如：当确定手机100位于允许SAR相对较大的国家，与允许SAR相对较小的国家比，手机100的最大发射功率也可以相对大。这样，根据手机100所处位置所属的国家或地区的法规对SAR的规定，可以更有针对性的调整手机100的电磁波辐射强度和/或辐射方向。
可选的，手机100还可以利用传感器辅助确定手机100附近是否有物体。当确定手机100附近有物体时，进一步执行向天线发送第一波形信号的步骤。
本发明实施例通过处理器向天线发送第一波形信号，接收第二波形信号，第二波形信号为第一波形信号经天线反射形成；根据第二波形信号，调整移动终端的电磁波辐射强度和/或辐射方向，其中，第二波形信号的特征可以反映人体与手机100的天线之间的距离。本发明实施例简化了调整移动终端的电磁波辐射参数的实现方案。
如图7所示，本发明实施例提供了一种调整移动终端的电磁波辐射参数的方法。为了便于说明，本发明实施例以手机为例进行示例性说明。下面以移动终端为手机示例，详细介绍调整移动终端的电磁波辐射参数的方法，包括：
手机100向天线发送第一波形信号(步骤702)，接收第二波形信号(步骤703)，第二波形信号为第一波形信号经天线反射形成，根据第二波形信号，调整手机100的电磁波辐射参数(步骤704)，例如：调整手机100的电磁波辐射强度和/或辐射方向。
作为一种可行的实施方式，可以使用传感器辅助检测手机100附近是否有物体(步骤701)，当检测到手机100附近有物体时，再执行步骤702。
所接收的第二波形信号为第一波形信号经天线反射形成，第二波形信号的特征，可以参见上述实施例介绍的由于手机100的天线相对于大地存在电容，当第一波形信号经天线时，电容充电效应，因此第二波形信号的上升沿相对于第一波形信号的上升沿更平缓。当有手机天线接近人体时，天线相对于大地的电容变大，第二波形信号的上升沿时间变长。手机天线与人体的距离越近，天线相对于大地的电容则越大，第二波形信号的上升沿时间越长，此处不再赘述。
步骤704的实施方式可以参见上述实施例介绍的根据第二方波信号的上升沿时间，和/或天线相对于大地的电容，和/或天线与人体之间的距离，通过切换天线的工作状态，和/或调整手机的最大发射功率，实现降低或增加电磁波辐射强度和/或调整辐射方向的实施方式以及有益效果，基于同一发明构思，此处不再赘述。其中704A的实施方式可以参见上述实施例介绍的通过切换天线，和/或切换天线匹配电路，和/或切换开关器件的工作状态，实现切换天线的工作状态的实施方式；704B的实施方式可以参见上述实施例介绍的通过调整功率放大器的控制电压和/或电源电压，和/或通过调整功率放大器的增益，实现调整手机的最大发射功率的实施方式。
可选的，可以确定手机100所处的国家或地区，确定该国家或地区的法规所规定的SAR的上限值，进一步根据SAR的上限值确定天线工作状态的切换方案，和/或手机的最大发射功率。
步骤701的实施方式，可以参见上述实施例介绍的利用传感器(例如接近传感器、环境光传感器、加速计传感器等)辅助确定手机100附近是否有物体的实施方式以及有益效果，基于同一发明构思，此处不再赘述。
如图8所示，本发明实施例还提供一种装置。该装置包括：发送单元801、接收单元802、和处理单元803。
所述发送单元801，用于向天线发送第一波形信号。第一波形信号可以为矩形波、锯齿波、方波、三角波、或正弦波信号。
所述接收单元802，用于接收第二波形信号，所述第二波形信号为所述第一波形信号经所述天线反射形成。第二波形信号的特征，可以参见上述实施例介绍的由于手机100的天线相对于大地存在电容，当第一波形信号经天线时，电容充电效应，因此第二波形信号的上升沿相对于第一波形信号的上升沿更平缓。当手机天线接近人体时，天线相对于大地的电容变大，第二波形信号的上升沿时间变长。手机天线与人体的距离越近，天线相对于大地的电容则越大，第二波形信号的上升沿时间越长，此处不再赘述。
所述处理单元803，用于根据所述第二波形信号，调整所述装置的电磁波辐射强度和/或辐射方向。所述处理单元的实施方式以及有益效果可以参见上述实施例中介绍的根据第二方波信号的上升沿时间，和/或天线相对于大地的电容，和/或天线与人体之间的距离，通过切换天线的工作状态，和/或调整手机的最大发射功率，实现降低或增加电磁波辐射强度和/或调整辐射方向的实施方式以及有益效果，基于同一发明构思，此处不再赘述。
处理单元803还可以包括确定子单元8031和处理子单元8032。
确定子单元8031的实施方式以及有益效果可以参见上述实施例介绍的根据第二波形信号确定上升沿时间，和/或天线相对于大地的电容，和/或天线与人体之间的距离的实施方式以及有益效果，基于同一发明构思，此处不再赘述。
处理子单元8032的实施方式以及有益效果可以参见上述实施例介绍的根据上升沿时间，和/或天线相对于大地的电容，和/或天线与人体之间的距离，调整电磁波辐射强度和/或辐射方向的实施方式以及有益效果，基于同一发明构思，此处不再赘述。
处理子单元还可以包括天线子单元80321和功率控制子单元80322。
天线子单元80321，用于根据上升沿时间，和/或天线相对于大地的电容，和/或天线与人体之间的距离，切换天线的工作状态。天线子单元的实施方式可以参见上述实施例介绍的当第二方波信号的上升沿时间大于预设上升沿时间，和/或天线相对于大地的电容大于预设电容，和/或天线与人体之间的距离小于预设距离时，将天线由第一天线辐射切换为第二天线辐射；和/或将天线匹配电路由第一匹配电路切换为第二匹配电路；和/或切换开关器件的工作状态，使主天线与预留走线连接；实现降低手机100的电磁波辐射强度和/或调整手机100的电磁波辐射方向，以降低手机100的电磁波辐射对人体的影响。维持使用切换后的天线辐射，直至当第二方波信号的上升沿时间小于预设上升沿时间，和/或天线相对于大地的电容小于预设电容，和/或天线与人体之间的距离大于预设距离时，将天线由第二天线辐射切换为第一天线辐射；和/或将天线匹配电路由第二匹配电路切换为第一匹配电路；和/或切换开关器件的工作状态，使主天线与预留走线断开，以增加手机100的电磁波辐射强度和/或调整辐射方向，以提升手机100的射频性能。维持使用切换后的天线辐射，直至当第二方波信号的上升沿时间大于预设上升沿时间，和/或天线相对于大地的电容大于预设电容，和/或天线与人体之间的距离小于预设距离时，将天线由第一天线辐射切换为第二天线辐射；和/或将天线匹配电路由第一匹配电路切换为第二匹配电路；和/或切换开关器件的工作状态，使主天线与预留走线连接，如此反复，在此不再赘述；基于同一发明构思，此处不再赘述。
功率控制子单元80322，用于：根据上升沿时间，和/或天线相对于大地的电容，和/或天线与人体之间的距离，调整装置的最大发射功率，实现调整装 置的电磁波辐射强度。功率控制子单元的实施方式可以参见上述实施例介绍的通过调整功率放大器的控制电压和/或电源电压，和/或调整功率放大器的增益，实现调整电磁波辐射强度的实施方式，基于同一发明构思，此处不再赘述。
可选的，本发明实施例提供的装置还可以包括确定单元804，用于确定是否有物体接近；当通过所述确定单元804确定有物体接近时，通过发送单元801向天线发送第一波形信号。
确定单元804的实施方式可以参见本上述实施例介绍的通过检测红外反射光、环境光、和/或加速度大小等实现检测是否有物体接近装置的实施方式，基于同一发明构思，此处不再赘述。
可选的，本发明实施例提供的装置还可以包括定位单元805，用于确定装置所处的位置，处理单元803根据定位装置所确定的位置执行调整电磁波辐射强度和/或辐射方向，实施方式以及有益效果可以参见上述实施例介绍的通过定位模块确定手机100所处位置的实施方式以及有益效果，基于同一发明构思，此处不再赘述。
本发明的实施例中电容，既可表示移动终端天线相对于大地的电容，也可表示移动终端天线相对于大地的电容值。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤是可以通过程序来指令处理器完成，所述的程序可以存储于计算机可读存储介质中，所述存储介质是非短暂性(英文：non-transitory)介质，例如随机存取存储器，只读存储器，快闪存储器，硬盘，固态硬盘，磁带(英文：magnetic tape)，软盘(英文：floppy disk)，光盘(英文：optical disc)及其任意组合。
本发明是参照本发明实施例的方法和设备各自的流程图和方框图来描述的。应理解可由计算机程序指令实现流程图和方框图中的每一流程和方框、以及流程图和方框图中的流程和方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理 器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和方框图一个方框或多个方框中指定的功能的装置。

Claims (30)

  1. 一种移动终端，其特征在于，所述移动终端包括：处理器、存储器和天线；
    所述存储器用于存储计算机可执行程序代码，所述程序代码包括指令；
    所述处理器用于执行所述指令，实现：
    向所述天线发送第一波形信号；
    接收第二波形信号，所述第二波形信号为所述第一波形信号经所述天线反射形成；
    根据所述第二波形信号，调整所述移动终端的电磁波辐射强度和/或辐射方向。
  2. 如权利要求1所述的移动终端，其特征在于，所述处理器根据所述第二波形信号，调整所述移动终端的电磁波辐射强度和/或辐射方向；包括：
    所述处理器根据所述第二波形信号确定第一时间，所述第一时间为所述第二波形信号的上升沿时间；根据所述第一时间，调整所述移动终端的电磁波辐射强度和/或辐射方向；或
    所述处理器根据所述第二波形信号确定第一电容，所述第一电容为所述天线相对于大地的电容；根据所述第一电容，调整所述移动终端的电磁波辐射强度和/或辐射方向；或
    所述处理器根据所述第二波形信号确定物体与所述天线之间距离；根据所述物体与所述天线之间的距离，调整所述移动终端的电磁波辐射强度和/或辐射方向。
  3. 如权利要求1或2所述的移动终端，其特征在于，
    所述第一波形信号为矩形波、锯齿波、方波、三角波、或正弦波信号。
  4. 如权利要求1-3任一项所述的移动终端，其特征在于，所述调整所述移 动终端的电磁波辐射强度和/或辐射方向，包括：所述处理器切换所述天线的工作状态，其中：
    当所述天线的工作状态变化时，所述移动终端的电磁波辐射强度和/或辐射方向不同。
  5. 如权利要求4所述的移动终端，其特征在于，所述天线包括第一天线和第二天线；
    所述处理器切换所述天线的工作状态，包括：
    所述处理器将所述天线由所述第一天线辐射切换为所述第二天线辐射；
    所述第二天线的电磁波辐射强度与所述第一天线的电磁波辐射强度不同；和/或
    所述第二天线的电磁波辐射方向与所述第一天线的电磁波辐射方向不同。
  6. 如权利要求4所述的移动终端，其特征在于，所述移动终端还包括天线匹配电路；所述天线匹配电路与所述天线连接；所述天线匹配电路包括第一匹配电路和第二匹配电路；
    所述处理器切换所述天线的工作状态，包括：
    所述处理器将所述天线匹配电路由所述第一匹配电路切换为所述第二匹配电路；
    所述天线连接所述第二匹配电路时的电磁波辐射强度，与所述天线连接所述第一匹配电路时的电磁波辐射强度不同；和/或
    所述天线连接所述第二匹配电路时的电磁波辐射方向，与所述天线连接所述第一匹配电路时的电磁波辐射方向不同。
  7. 如权利要求4所述的移动终端，其特征在于，所述天线包括主天线、开关器件以及预留走线；所述开关器件用于控制所述主天线与所述预留走线 连接或断开；
    所述处理器切换所述天线的工作状态，包括：
    所述处理器切换所述开关器件的工作状态，使所述主天线与所述预留走线连接，构成新天线；
    所述新天线的电磁波辐射强度与所述主天线的电磁波辐射强度不同；和/或
    所述新天线的电磁波辐射方向与所述主天线的电磁波辐射方向不同。
  8. 如权利要求1所述的移动终端，其特征在于，所述移动终端还包括功率放大器；
    所述调整所述移动终端的电磁波辐射强度，包括：
    所述处理器调整所述功率放大器的控制电压和/或电源电压，其中：
    当所述功率放大器的控制电压和/或电源电压变化时，所述移动终端的电磁波辐射强度不同；和/或
    所述处理器调整所述功率放大器的增益，其中：
    当所述功率放大器的增益变化时，所述移动终端的电磁波辐射强度不同。
  9. 如权利要求1-8任一项所述的移动终端，其特征在于，所述处理器根据所述第二波形信号，调整所述移动终端的电磁波辐射强度；包括：
    所述处理器根据所述第二波形信号，降低所述移动终端的电磁波辐射强度；和/或，所述处理器根据所述第二波形信号，增加所述移动终端的电磁波辐射强度。
  10. 如权利要求1-9任一项所述的移动终端，其特征在于，所述移动终端还包括传感器；所述传感器包括接近传感器、环境光传感器、和/或加速计传感器；
    所述处理器接收所处传感器发送的传感数据；
    当所述处理器根据所述传感数据确定有物体接近所述移动终端时，向所述天线发送第一波形信号。
  11. 一种调整移动终端的电磁波辐射参数的方法，所述移动终端包括天线，所述方法包括：
    所述移动终端向所述天线发送第一波形信号；
    接收第二波形信号，所述第二波形信号为所述第一波形信号经所述天线反射形成；
    根据所述第二波形信号，调整所述移动终端的电磁波辐射强度和/或辐射方向。
  12. 如权利要求11所述的方法，其特征在于，所述根据所述第二波形信号，调整所述移动终端的电磁波辐射强度和/或辐射方向，包括：
    根据所述第二波形信号确定第一时间，所述第一时间为所述第二波形信号的上升沿时间；根据所述第一时间，调整所述移动终端的电磁波辐射强度和/或辐射方向；或
    根据所述第二波形信号确定第一电容，所述第一电容为所述天线相对于大地的电容；根据所述第一电容，调整所述移动终端的电磁波辐射强度和/或辐射方向；或
    根据所述第二波形信号确定物体与所述天线之间距离；根据所述物体与所述天线之间的距离，调整所述移动终端的电磁波辐射强度和/或辐射方向。
  13. 如权利要求11或12所述的方法，其特征在于，
    所述第一波形信号为矩形波、锯齿波、方波、三角波、或正弦波信号。
  14. 如权利要求11-13任一项所述的方法，其特征在于，所述调整所述移动终端的电磁波辐射强度和/或辐射方向，包括：切换所述天线的工作状态， 其中：
    当所述天线的工作状态变化时，所述移动终端的电磁波辐射强度和/或辐射方向不同。
  15. 如权利要求14所述的方法，其特征在于，所述天线包括第一天线和第二天线；
    所述切换所述天线的工作状态，包括：
    将所述天线由所述第一天线辐射切换为所述第二天线辐射；
    所述第二天线的电磁波辐射强度与所述第一天线的电磁波辐射强度不同；和/或
    所述第二天线的电磁波辐射方向与所述第一天线的电磁波辐射方向不同。
  16. 如权利要求14所述的方法，其特征在于，所述移动终端还包括天线匹配电路；所述天线匹配电路与所述天线连接；所述天线匹配电路包括第一匹配电路和第二匹配电路；
    所述切换所述天线的工作状态，包括：
    将所述天线匹配电路由所述第一匹配电路切换为所述第二匹配电路；
    所述天线连接所述第二匹配电路时的电磁波辐射强度，与所述天线连接所述第一匹配电路时电磁波辐射强度不同；和/或
    所述天线连接所述第二匹配电路时的电磁波辐射方向，与所述天线连接所述第一匹配电路时的电磁波辐射方向不同。
  17. 如权利要求14所述的方法，其特征在于，所述天线包括主天线、开关器件以及预留走线；所述开关器件用于控制所述主天线与所述预留走线连接或断开；
    所述切换所述天线的工作状态，包括：
    切换所述开关器件的工作状态，使所述主天线与所述预留走线连接，构成新的天线；
    所述新天线的电磁波辐射强度与所述主天线的电磁波辐射强度不同；和/或
    所述新天线的电磁波辐射方向与所述主天线的电磁波辐射方向不同。
  18. 如权利要求11-17任一项所述的方法，其特征在于，所述调整所述移动终端的电磁波辐射强度，包括：
    调整所述功率放大器的控制电压和/或电源电压，其中：
    当所述功率放大器的控制电压和/或电源电压变化，所述移动终端的电磁波辐射强度不同；和/或
    调整所述功率放大器的增益，其中：
    当所述功率放大器的增益变化时，所述移动终端的电磁波辐射强度不同。
  19. 如权利要求11-18任一项所述的方法，其特征在于，所述根据所述第二波形信号，调整所述移动终端的电磁波辐射强度；包括：
    根据所述第二波形信号，降低所述移动终端的电磁波辐射强度；和/或，根据所述第二波形信号，增加所述移动终端的电磁波辐射强度。
  20. 如权利要求11-19任一项所述的方法，其特征在于，所述方法还包括：
    确定是否有物体接近所述移动终端；
    当确定有物体接近所述移动终端时，所述移动终端向所述天线发送第一波形信号。
  21. 一种装置，其特征在于，所述装置包括发送单元、接收单元和处理单元：
    所述发送单元，用于向天线发送第一波形信号；
    所述接收单元，用于接收第二波形信号，所述第二波形信号为所述第一 波形信号经所述天线反射形成；
    所述处理单元，用于根据所述第二波形信号，调整所述装置的电磁波辐射强度和/或辐射方向。
  22. 如权利要求21所述的装置，其特征在于，所述处理单元包括确定子单元和处理子单元；
    所述确定子单元，用于：
    根据所述第二波形信号确定第一时间，所述第一时间为所述第二波形信号的上升沿时间；或
    根据所述第二波形信号确定第一电容，所述第一电容为所述天线相对于大地的电容；或
    根据所述第二波形信号确定物体与所述天线之间的距离；
    所述处理子单元，用于：
    根据所述第一时间，或根据所述第一电容，或根据所述物体与所述天线之间的距离；
    调整所述装置的电磁波辐射强度和/或辐射方向。
  23. 如权利要求21或22所述的装置，其特征在于，
    所述第一波形信号为矩形波、锯齿波、方波、三角波、或正弦波信号。
  24. 如权利要求22或23所述的装置，其特征在于，所述处理子单元，包括天线子单元；
    所述天线子单元，用于：
    根据所述第一时间，或根据所述第一电容，或根据所述物体与所述天线之间的距离；
    将所述天线由第一天线辐射切换为第二天线辐射；
    所述第二天线的电磁波辐射强度与所述第一天线的电磁波辐射强度不 同；和/或
    所述第二天线的电磁波辐射方向与所述第一天线的电磁波辐射方向不同。
  25. 如权利要求22或23所述的装置，其特征在于，所述处理子单元，包括天线子单元；
    所述天线子单元，用于：
    根据所述第一时间，或根据所述第一电容，或根据所述物体与所述天线之间的距离；
    将所述天线匹配电路由所述第一匹配电路切换为所述第二匹配电路；
    所述天线连接所述第二匹配电路时的电磁波辐射强度，与所述天线连接所述第一匹配电路时的电磁波辐射强度不同；和/或
    所述天线连接所述第二匹配电路时的电磁波辐射方向，与所述天线连接所述第一匹配电路时的电磁波辐射方向不同。
  26. 如权利要求22或23所述的装置，其特征在于，所述处理子单元，包括天线子单元；
    所述天线子单元，用于：
    根据所述第一时间，或根据所述第一电容，或根据所述物体与所述天线之间的距离；
    切换开关器件的工作状态，使主天线与预留走线连接，构成新天线；
    所述新天线的电磁波辐射强度与所述主天线的电磁波辐射强度不同；和/或
    所述新天线的电磁波辐射方向与所述主天线的电磁波辐射方向不同。
  27. 如权利要求22-26任一项所述的装置，其特征在于，所述处理子单元，包括功率控制子单元；
    所述功率控制子单元，用于：
    根据所述第一时间，或根据所述第一电容，或根据所述物体与所述天线之间的距离，调整功率放大器的控制电压和/或电源电压，其中：
    当所述功率放大器的控制电压和/或电源电压变化，所述装置的电磁波辐射强度不同；和/或
    根据所述第一时间，或根据所述第一电容，或根据所述物体与所述天线之间的距离，调整所述功率放大器的增益，其中：
    当所述功率放大器的增益变化时，所述装置的电磁波辐射强度不同。
  28. 如权利要求21-27任一项所述的装置，其特征在于，所述处理单元根据所述第二波形信号，调整所述装置的电磁波辐射强度和/或辐射方向，具体包括：
    所述处理单元根据所述第二波形信号，降低所述装置的电磁波辐射强度；和/或，根据所述第二波形信号，增加所述装置的电磁波辐射强度。
  29. 如权利要求21-28任一项所述的装置，其特征在于，所述装置还包括确定单元，
    所述确定单元，用于确定是否有物体接近所述装置；
    当所述确定单元确定有物体接近所述装置时，所述发送单元向所述天线发送第一波形信号。
  30. 一种存储介质，其特征在于，所述存储介质为非易失性计算机可读存储介质，所述非易失性计算机可读存储介质存储有至少一个程序，每个所述程序包括指令，所述指令当被具有处理器、天线的移动终端执行时使所述移动终端执行根据权利要求11-20任一项所述的调整所述移动终端的电磁波辐射参数的方法。
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