CN108880576A - A kind of adjusting method of mobile terminal and antenna matching network - Google Patents
A kind of adjusting method of mobile terminal and antenna matching network Download PDFInfo
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- CN108880576A CN108880576A CN201810799768.8A CN201810799768A CN108880576A CN 108880576 A CN108880576 A CN 108880576A CN 201810799768 A CN201810799768 A CN 201810799768A CN 108880576 A CN108880576 A CN 108880576A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
- H04B7/0608—Antenna selection according to transmission parameters
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Abstract
The invention proposes a kind of mobile terminal and the adjusting methods of antenna matching network.The mobile terminal includes：Antenna；Antenna matching network module is connect with the antenna, and the antenna matching network module includes the first tunable capacitor, the second tunable capacitor and fixed inductance；Directional coupler is connect with the antenna matching network module and RF transceiver, and the radiofrequency signal for reflecting the antenna matching network module is distributed to the RF transceiver；Antenna switch module, the antenna switch module are set between the directional coupler and the RF transceiver；Base band is connect with the RF transceiver, and is connect by the first control line with first tunable capacitor, is connect by the second control line with second tunable capacitor.Mobile terminal proposed by the present invention adjusts the antenna matching network of current frequency range with realizing real-time intelligent, to achieve the purpose that reduce antenna matching network mismatch, improve antenna performance.
Description
Technical field
The present invention relates to terminal antenna technical field, in particular to a kind of mobile terminal and antenna matching network
Adjusting method.
Background technique
Currently, the mobile terminal with metal back cover using more and more common, antenna is as being used for setting for receiving and transmitting signal
It is standby, the specific region of metal back cover is usually designed as to a part of mobile terminal antenna, however user is mobile in normal use
A part that antenna area may be sheltered from when terminal unintentionally, causes the unstable of antenna signal strength.For example, user exists
During voice communication or hand-held mobile terminal play game, the hand of user often holds mobile terminal and shelters from antenna field
Domain, not only affects the field shape of aerial radiation, but also in palm contacts and when block metallic region, the S parameter of antenna
It can change.And since area, position or the dynamics that user holds the region of mobile terminal metal are different, the S ginseng of antenna
Number can also change therewith, and the acute variation of antenna S parameter can cause the unstability of antenna performance, reduce user experience.
In the related technology, the adjustable matching scheme of mobile terminal is the S parameter according to currently used frequency range and its antenna, right
Each tunable capacitor debugs out the value of one group of fixation, and the information of this group of fixed value is write base band.However, in the related technology
Adjustable matching network scheme has the following disadvantages：For current working frequency, the value that base band is written to adjustable matching network is
Fixed, but during actual use, since user holds region and the dynamics difference of the metal back cover of mobile terminal, antenna
S parameter can change, the performance of antenna can further deteriorate.Therefore, a kind of mobile terminal and antenna match how to be designed
The adjusting method of network still keeps stable working condition to become urgently to be resolved to realize even if the antenna area antenna that is blocked
The technical issues of.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, one aspect of the present invention is to propose a kind of mobile terminal.
Another aspect of the present invention is to propose a kind of adjusting method of antenna matching network.
In view of this, according to an aspect of the present invention, it proposes a kind of mobile terminals, including：Antenna；Antenna match net
Network module, connect with antenna, and antenna matching network module includes the first tunable capacitor, the second tunable capacitor and fixed inductance；It is fixed
It to coupler, is connect with antenna matching network module and RF transceiver, the radio frequency for reflecting antenna matching network module
Signal is distributed to RF transceiver；Antenna switch module, antenna switch module be set to directional coupler and RF transceiver it
Between；Base band is connect with RF transceiver, and is connect by the first control line with the first tunable capacitor, and the second control line is passed through
It is connect with the second tunable capacitor.
In mobile terminal provided by the invention, antenna is connected with antenna matching network module, and directional coupler is by antenna
The reflected radiofrequency signal of matching network module is coupled to power on RF transceiver and detects, and is denoted as reflection power (P2),
The radiofrequency signal that antenna emits is coupled to power on RF transceiver and detected by antenna switch module, is denoted as transmission power
(P1), it and by this group of data is sent to coupled base band, when user holds the metal shell of mobile terminal, antenna
S parameter will change, and it is an important parameter in microwave transmission that wherein S parameter, which is scattering parameter,.Preset one rationally
Threshold values S0, when the ratio of P2 and P1 be greater than S0 when, base band real-time intelligent by the first control line adjust the first tunable capacitor
Capacitance size, and by the second control line adjust the second tunable capacitor capacitance size.Even if user is in normal use
Holding mobile terminal shelters from a part of metal shell antenna area in the process or hand-held dynamics causes the S parameter of antenna
It influences, mobile terminal can make amendment to the capacitance of tunable capacitor, adjust to real-time intelligent according to the difference for holding situation
The antenna matching network of current frequency range, to achieve the purpose that reduce antenna matching network mismatch, improve antenna performance.
Above-mentioned mobile terminal according to the present invention, can also have following technical characteristic：
In the above-mentioned technical solutions, it is preferable that fixed inductance includes that the first fixed inductance, the second fixed inductance and third are fixed
Inductance；First fixed inductance and the first tunable capacitor are series between antenna and directional coupler；One end of second fixed inductance
It is connect with the first tunable capacitor and directional coupler, the other end of the second fixed inductance is connect with one end of the second tunable capacitor；
The other end of second tunable capacitor is grounded；Third fixed inductance one end is connect with the first fixed inductance and antenna, the fixed electricity of third
The other end of sense is grounded.
In the technical scheme, the first fixed inductance, the first tunable capacitor, the second fixed inductance, the second tunable capacitor and
Third fixed inductance is interconnected to constitute antenna matching network module, and antenna matching network inside modules resistance is on-fixed electricity
Resistance, but adjustable resistance, and then the adjustment of antenna matching network can be realized for sending out antenna by the adjustment of resistance
The radiofrequency signal penetrated be coupled to RF transceiver power detection, in this way can in real time, be accurately obtained various use habits
User during normal use mobile terminal antenna emit radiofrequency signal transmission power (P1), further realize
Judge the signal strength of radiofrequency signal.
In any of the above-described technical solution, it is preferable that antenna switch module, including：Single pole multiple throw, with radio-frequency receiving-transmitting
Device connection；Inner couplings device, connect with directional coupler and RF transceiver, the radiofrequency signal for emitting antenna distribute to
RF transceiver.
In the technical scheme, it is set to the single pole multiple throw connect between RF transceiver and inner couplings device and is used as control
The electronic device of circuit processed can connect different branches and control the outbound course of electric current；Inner couplings device can be by antenna
The radiofrequency signal emitted is coupled on RF transceiver in real time, so that RF transceiver carries out power detection, further
Realize the antenna matching network for adjusting current frequency range.
In any of the above-described technical solution, it is preferable that further include：Power amplifier is connect with RF transceiver.
In the technical scheme, the radiofrequency signal and antenna matching network that RF transceiver emits antenna are reflected
The detection of radiofrequency signal power, is denoted as transmission power (P1) and reflection power (P2) respectively, is received using power amplifier to radio frequency
The transmission power (P1) and reflection power (P2) that hair device detects carry out analog signal amplification, convenient for further identifying, analyzing
With the processing signal.
In any of the above-described technical solution, it is preferable that further include：Filter and duplexer, filter are in parallel with duplexer
Between single pole multiple throw and power amplifier.
In the technical scheme, it be free to select to connect or disconnect filter and duplexer by single pole multiple throw
The respective branch between inner couplings device, filter can be to the transmission powers (P1) and reflection function amplified through power amplifier
The frequency point of specific frequency or the frequency other than the frequency point are effectively filtered out in rate (P2), obtain the power supply letter an of specific frequency
Both number, or the power supply signal after a specific frequency is eliminated, outputting and inputting for signal can be isolated by duplexer, guarantee
It can work normally simultaneously.
According to another aspect of the present invention, a kind of adjusting method of antenna matching network is proposed, for such as above-mentioned
The adjusting method of one mobile terminal, antenna matching network includes：Obtain the transmission power of antenna；Obtain antenna matching network
Reflection power；Calculate the ratio of reflection power and transmission power；According to ratio, antenna matching network is adjusted.
The adjusting method of antenna matching network provided by the invention, by the transmitting function for obtaining mobile terminal antenna in real time
Rate (P1), and the reflected reflection power of antenna matching network (P2) is obtained, in this way, when user holds the gold of mobile terminal
When belonging to shell, due to palm block the antenna area of metal shell area or position and holding dynamics intensity it is different, meeting
The S parameter of antenna is influenced in varying degrees, and transmission power (P1) and reflection power (P2) can also change correspondingly, according to reflection power
(P2) with the ratio of transmission power (P1), antenna matching network is adjusted, user is overcome during normal use, due to hand
The problem of palm shelters from antenna area to influence the S parameter of antenna, and then caused antenna performance deteriorates, to improve day
Stability, the signal strength of line work.
The adjusting method of above-mentioned antenna matching network according to the present invention, can also have following technical characteristic：Above-mentioned
In technical solution, it is preferable that the step of obtaining the transmission power of antenna specifically includes：Obtain the first radio frequency letter of antenna transmitting
Number；Detect the transmission power of the first radiofrequency signal.
In the technical scheme, the signal of antenna transmitting is got in real time as the first radiofrequency signal, and detection has obtained
The watt level of the first radiofrequency signal arrived is denoted as transmission power (P1), by judging that the size of tranmitting frequency (P1) can be quasi-
Really analyze the power of antenna transmitting signal.
In any of the above-described technical solution, it is preferable that the step of obtaining the reflection power of antenna matching network, it is specific to wrap
It includes：Obtain the second radiofrequency signal of antenna matching network reflection；Detect the reflection power of the second radiofrequency signal.
In the technical scheme, the signal of antenna matching network reflection is obtained in real time as the second radiofrequency signal, detection
The watt level of the second radiofrequency signal got is denoted as reflection power (P2), by the size for judging reflection power (P2)
It can accurately analyze the power of antenna-reflected signal.
In any of the above-described technical solution, it is preferable that according to ratio, the step of adjusting antenna matching network, specifically include：
Judge whether ratio is greater than given threshold；When ratio is greater than given threshold, antenna matching network mismatch is determined；Adjust antenna
The capacitance of the tunable capacitor of distribution network, until ratio is less than given threshold.
In the technical scheme, by obtaining the transmission power (P1) of mobile terminal antenna, and acquisition antenna in real time
The reflected reflection power of matching network (P2) determines the ratio of reflection power (P2) Yu transmission power (P1), can pass through
The mode of preset threshold S0 characterizes antenna matching network mismatch, antenna when this ratio is greater than preset reasonable threshold values S0
Performance into deterioration, will affect user experience, then adjust the capacitance of the tunable capacitor of antenna matching network, until this
Ratio is less than reservation threshold S0, in this way, can adjust to real-time intelligent current frequency range according to antenna area practical capped situation
Antenna matching network, achieve the purpose that improve antenna performance.
In any of the above-described technical solution, it is preferable that further include：When ratio is less than given threshold, antenna match is determined
The non-mismatch of network, is not handled.
In the technical scheme, judge the ratio and setting threshold values S0 relationship of transmission power (P1) and reflection power (P2)
Another situation, i.e., when the ratio is less than setting threshold values S0, the non-mismatch of antenna matching network, the quality of antenna performance is can
In the range of receiving, and then the flexibility of method is increased, meets the demand of the user of different use habits.
Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention
Recognize.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, wherein：
Fig. 1 shows the electrical block diagram of the mobile terminal of one embodiment of the present of invention；
Fig. 2 shows the flow diagrams of the adjusting method of the antenna matching network of one embodiment of the invention；
Fig. 3 shows the flow diagram of the adjusting method of the antenna matching network of second embodiment of the invention；
Fig. 4 shows the flow diagram of the adjusting method of the antenna matching network of third embodiment of the invention.
Wherein, the corresponding relationship in Fig. 1 between appended drawing reference and component is：
12 antennas, 14 antenna matching network modules, 1,402 first tunable capacitors, 1,404 second tunable capacitors, 16 directional couples
Device, 18 RF transceivers, 20 antenna switch modules, 22 base band, 24 first control lines, 26 second control lines, 1,406 first is fixed
Inductance, 1,408 second fixed inductances, 1410 third fixed inductances, 202 single pole multiple throws, 204 inner couplings devices, 28 power
Amplifier, 30 filters, 32 duplexers.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not limited to following public affairs
The limitation for the specific embodiment opened.
The embodiment of first aspect present invention proposes that a kind of mobile terminal, Fig. 1 show one embodiment of the present of invention
The electrical block diagram of mobile terminal.Wherein, which includes：
Antenna 12；
Antenna matching network module 14 is connect with antenna 12, antenna matching network module 14 include the first tunable capacitor 1402,
Second tunable capacitor 1404 and fixed inductance；
Directional coupler 16 is connect with antenna matching network module 14 and RF transceiver 18, is used for antenna matching network mould
The radiofrequency signal that block 14 reflects is distributed to RF transceiver 18；
Antenna switch module 20, antenna switch module 20 are set between directional coupler 16 and RF transceiver 18；
Base band 22 is connect with RF transceiver 18, and is connect by the first control line 24 with the first tunable capacitor 1402, is led to
The second control line 26 is crossed to connect with the second tunable capacitor 1404.
In mobile terminal provided by the invention, antenna 12 is connected with antenna matching network module 14, directional coupler 16
The reflected radiofrequency signal of antenna matching network module 14 is coupled to power on RF transceiver 18 to detect, is denoted as reflection
The radiofrequency signal that antenna 12 emits is coupled to power on RF transceiver 18 and detected by power (P2), antenna switch module 20,
It is denoted as transmission power (P1), and this group of data is sent to coupled base band 22, when user holds the gold of mobile terminal
When belonging to shell, the S parameter of antenna 12 will change, and it is an important ginseng in microwave transmission that wherein S parameter, which is scattering parameter,
Number.A reasonable threshold values S0 is preset, when the ratio of P2 and P1 is greater than S0, passes through the first control to 22 real-time intelligent of base band
Line 24 adjusts the capacitance size of the first tunable capacitor 1402, and adjusts the second tunable capacitor 1404 by the second control line 26
Capacitance size.Even if user holds a part that mobile terminal shelters from metal shell antenna area during normal use
Or hand-held dynamics impacts the S parameter of antenna, mobile terminal can be according to the difference for holding situation, to tunable capacitor
Capacitance makes amendment, adjusts to real-time intelligent the antenna matching network of current frequency range, reduces antenna matching network mistake to reach
Match, improve the purpose of antenna performance.
In one embodiment of the invention, it is preferable that fixed inductance includes the fixed electricity of the first fixed inductance 1406, second
Sense 1408 and third fixed inductance 1410；First fixed inductance 1406 and the first tunable capacitor 1402 are series at antenna 12 and orientation
Between coupler 16；One end of second fixed inductance 1408 is connect with the first tunable capacitor 1402 and directional coupler 16, and second
The other end of fixed inductance 1408 is connect with one end of the second tunable capacitor 1404；Another termination of second tunable capacitor 1404
Ground；1410 one end of third fixed inductance is connect with the first fixed inductance 1406 and antenna 12, third fixed inductance 1410 it is another
End ground connection.
In this embodiment, the first fixed inductance 1406, the first tunable capacitor 1402, the second fixed inductance 1408, second
Tunable capacitor 1404 and third fixed inductance 1410 are interconnected to constitute antenna matching network module 14, antenna matching network module
Internal resistance is on-fixed resistance, but adjustable resistance, and then can realize antenna matching network by the adjustment of resistance
Adjustment.
In one embodiment of the invention, it is preferable that antenna switch module 20, including：Single pole multiple throw 202, with
RF transceiver 18 connects；Inner couplings device 204 is connect with directional coupler 16 and RF transceiver 18, is used for antenna 12
The radiofrequency signal of transmitting is distributed to RF transceiver 18.
In this embodiment, it is set to the single pole multiple throw 202 connect between RF transceiver 18 and inner couplings device 204
As the electronic device of control circuit, different branches can also be connected and control the outbound course of electric current；Inner couplings device 204
The radiofrequency signal that antenna 12 is emitted can be coupled in real time on RF transceiver 18, so that RF transceiver 18 carries out function
Rate detection, further realizes the antenna matching network for adjusting current frequency range.
In one embodiment of the invention, it is preferable that further include：Power amplifier 28 is connect with RF transceiver 18.
In this embodiment, the radiofrequency signal and antenna matching network that RF transceiver 18 emits antenna 12 reflect
The detection of radiofrequency signal power, transmission power (P1) and reflection power (P2) are denoted as respectively, using power amplifier 28 to penetrating
The transmission power (P1) and reflection power (P2) that frequency transceiver 18 detects carry out analog signal amplification, convenient for further knowing
, the signal is not analyzed and handles.
In one embodiment of the invention, it is preferable that further include：Filter 30 and duplexer 32, filter 30 and double
Work device 32 is parallel between single pole multiple throw 202 and power amplifier 28.
In this embodiment it is possible to freely connect or disconnect filter 30 and double by the selection of single pole multiple throw 202
Respective branch between work device 32 and inner couplings device 204, filter 30 can be to the transmitting function amplified through power amplifier 28
The frequency point of specific frequency or the frequency other than the frequency point are effectively filtered out in rate (P1) and reflection power (P2), obtain a spy
Determine the power supply signal of frequency, or eliminate the power supply signal after a specific frequency, duplexer 32 can be by the input of signal and defeated
It is isolated out, guarantees that the two can work normally simultaneously.
The embodiment of second aspect of the present invention proposes a kind of adjusting method of antenna matching network, for such as any of the above-described
The mobile terminal of item, Fig. 2 shows the flow diagrams of the adjusting method of the antenna matching network of one embodiment of the present of invention.
Wherein, this method includes：
Step 202, the transmission power of antenna is obtained；
Step 204, the reflection power of antenna matching network is obtained；
Step 206, the ratio of reflection power and transmission power is calculated；
Step 208, according to ratio, antenna matching network is adjusted.
The adjusting method of antenna matching network provided by the invention, by the transmitting function for obtaining mobile terminal antenna in real time
Rate (P1), and the reflected reflection power of antenna matching network (P2) is obtained, in this way, when user holds the gold of mobile terminal
When belonging to shell, due to palm block the antenna area of metal shell area or position and holding dynamics intensity it is different, meeting
The S parameter of antenna is influenced in varying degrees, and transmission power (P1) and reflection power (P2) can also change correspondingly, according to reflection power
(P2) with the ratio of transmission power (P1), antenna matching network is adjusted, user is overcome during normal use, due to hand
The problem of palm shelters from antenna area to influence the S parameter of antenna, and then caused antenna performance deteriorates, to improve day
Stability, the signal strength of line work.
Fig. 3 shows the flow diagram of the adjusting method of the antenna matching network of second embodiment of the invention.Its
In, this method includes：
Step 302, the first radiofrequency signal of antenna transmitting is obtained；
Step 304, the transmission power of the first radiofrequency signal is detected；
Step 306, the second radiofrequency signal of antenna matching network reflection is obtained；
Step 308, the reflection power of the second radiofrequency signal is detected；
Step 310, the ratio of reflection power and transmission power is calculated；
Step 312, according to ratio, antenna matching network is adjusted.
In this embodiment, by obtaining the transmission power (P1) of mobile terminal antenna, and acquisition antenna in real time
The reflected reflection power of distribution network (P2), in this way, when user holds the metal shell of mobile terminal, since palm blocks
The dynamics intensity of the area of the antenna area of metal shell or position and holding is different, can influence the S of antenna in varying degrees
Parameter, transmission power (P1) and reflection power (P2) can also change correspondingly, according to reflection power (P2) and transmission power (P1)
Ratio, adjust antenna matching network, overcome user during normal use, due to palm shelter from antenna area to
The S parameter of antenna is influenced, and then the problem of the deterioration of caused antenna performance, to improve the stability of Antenna Operation, signal
Intensity.The signal of antenna transmitting is got in real time as the first radiofrequency signal, detects the first radiofrequency signal got
Watt level is denoted as transmission power (P1), by judging that the size of tranmitting frequency (P1) can accurately analyze antenna transmitting
The power of signal.The signal of antenna matching network reflection is obtained in real time as the second radiofrequency signal, detects the got
The watt level of two radiofrequency signals is denoted as reflection power (P2), by judging that the size of reflection power (P2) can accurately divide
The power of antenna-reflected signal is precipitated.
Fig. 4 shows the flow diagram of the adjusting method of the antenna matching network of third embodiment of the invention.Its
In, this method includes：
Step 402, the first radiofrequency signal of antenna transmitting is obtained；
Step 404, the transmission power of the first radiofrequency signal is detected；
Step 406, the second radiofrequency signal of antenna matching network reflection is obtained；
Step 408, the reflection power of the second radiofrequency signal is detected；
Step 410, the ratio of reflection power and transmission power is calculated；
Step 412, judge whether ratio is greater than given threshold, if so, thening follow the steps 414, otherwise, then follow the steps 416；
Step 414, it determines antenna matching network mismatch, adjusts the capacitance of the tunable capacitor of antenna matching network, until ratio
Less than given threshold；
Step 416, it determines the non-mismatch of antenna matching network, does not handle.
In this embodiment, by obtaining the transmission power (P1) of mobile terminal antenna, and acquisition antenna in real time
The reflected reflection power of distribution network (P2), in this way, when user holds the metal shell of mobile terminal, since palm blocks
The dynamics intensity of the area of the antenna area of metal shell or position and holding is different, can influence the S of antenna in varying degrees
Parameter, transmission power (P1) and reflection power (P2) can also change correspondingly, according to reflection power (P2) and transmission power (P1)
Ratio, adjust antenna matching network, overcome user during normal use, due to palm shelter from antenna area to
The S parameter of antenna is influenced, and then the problem of the deterioration of caused antenna performance, to improve the stability of Antenna Operation, signal
Intensity.The signal of antenna transmitting is got in real time as the first radiofrequency signal, detects the first radiofrequency signal got
Watt level is denoted as transmission power (P1), by judging that the size of tranmitting frequency (P1) can accurately analyze antenna transmitting
The power of signal.The signal of antenna matching network reflection is obtained in real time as the second radiofrequency signal, detects the got
The watt level of two radiofrequency signals is denoted as reflection power (P2), by judging that the size of reflection power (P2) can accurately divide
The power of antenna-reflected signal is precipitated.
By obtaining the transmission power (P1) of mobile terminal antenna in real time, and obtains antenna matching network and reflect
Reflection power (P2), determine the ratio of reflection power (P2) Yu transmission power (P1), can by way of preset threshold S0,
When this ratio is greater than preset reasonable threshold values S0, antenna matching network mismatch is characterized, the performance of antenna, can shadow into deterioration
User experience is rung, then adjusts the capacitance of the tunable capacitor of antenna matching network, until this ratio is less than reservation threshold
S0, in this way, the antenna matching network of current frequency range can be adjusted to real-time intelligent according to the practical capped situation of antenna area,
Achieve the purpose that improve antenna performance.
Judge the ratio of transmission power (P1) and reflection power (P2) and another situation of setting threshold values S0 relationship,
I.e. the ratio be less than setting threshold values S0 when, the non-mismatch of antenna matching network, antenna performance quality within the acceptable range,
And then the flexibility of method is increased, meet the demand of the user of different use habits.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of mobile terminal, which is characterized in that including：
Antenna；
Antenna matching network module is connect with the antenna, and the antenna matching network module includes the first tunable capacitor, second
Tunable capacitor and fixed inductance；
Directional coupler is connect with the antenna matching network module and RF transceiver, is used for the antenna matching network
The radiofrequency signal of module reflection is distributed to the RF transceiver；
Antenna switch module, the antenna switch module are set between the directional coupler and the RF transceiver；
Base band is connect with the RF transceiver, and is connect with first tunable capacitor by the first control line, by the
Two control lines are connect with second tunable capacitor.
2. mobile terminal according to claim 1, which is characterized in that the fixed inductance includes the first fixed inductance, the
Two fixed inductances and third fixed inductance；
First fixed inductance and first tunable capacitor are series between the antenna and the directional coupler；
One end of second fixed inductance is connect with first tunable capacitor and the directional coupler, and described second is fixed
The other end of inductance is connect with one end of second tunable capacitor；
The other end of second tunable capacitor is grounded；
Third fixed inductance one end is connect with first fixed inductance and the antenna, the third fixed inductance it is another
One end ground connection.
3. mobile terminal according to claim 1, which is characterized in that the antenna switch module, including：
Single pole multiple throw is connect with the RF transceiver；
Inner couplings device is connect with the directional coupler and the RF transceiver, the radio frequency for emitting the antenna
Signal is distributed to the RF transceiver.
4. mobile terminal according to claim 3, which is characterized in that further include：
Power amplifier is connect with the RF transceiver.
5. mobile terminal according to claim 4, which is characterized in that further include：
Filter and duplexer, the filter and the duplexer are parallel to the single pole multiple throw and the power amplification
Between device.
6. a kind of adjusting method of antenna matching network, for the mobile terminal as described in any one of claims 1 to 5,
It is characterized in that, the adjusting method of the antenna matching network includes：
Obtain the transmission power of the antenna；Obtain the reflection power of the antenna matching network；
Calculate the ratio of the reflection power Yu the transmission power；
According to the ratio, the antenna matching network is adjusted.
7. the adjusting method of antenna matching network according to claim 6, which is characterized in that the acquisition antenna
The step of transmission power, specifically includes：
Obtain the first radiofrequency signal of the antenna transmitting；
Detect the transmission power of first radiofrequency signal.
8. the adjusting method of antenna matching network according to claim 6, which is characterized in that described to obtain the antenna
It the step of reflection power of distribution network, specifically includes：
Obtain the second radiofrequency signal of the antenna matching network reflection；
Detect the reflection power of second radiofrequency signal.
9. the adjusting method of the antenna matching network according to any one of claim 6 to 8, which is characterized in that described
According to the ratio, the step of adjusting the antenna matching network, specifically include：
Judge whether the ratio is greater than given threshold；
When the ratio is greater than the given threshold, the antenna matching network mismatch is determined；
The capacitance of the tunable capacitor of the antenna matching network is adjusted, until the ratio is less than the given threshold.
10. the adjusting method of antenna matching network according to claim 9, which is characterized in that further include：
When the ratio is less than the given threshold, determines the non-mismatch of the antenna matching network, do not handle.
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| CN201810799768.8A CN108880576A (en) | 2018-07-20 | 2018-07-20 | A kind of adjusting method of mobile terminal and antenna matching network |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109474731A (en) * | 2018-12-22 | 2019-03-15 | Oppo（重庆）智能科技有限公司 | Radio frequency adjustment method and Related product |
| WO2020216180A1 (en) * | 2019-04-25 | 2020-10-29 | 维沃移动通信有限公司 | Power detection circuit and terminal |
| WO2021056879A1 (en) * | 2019-09-23 | 2021-04-01 | 广州慧智微电子有限公司 | Radio-frequency front-end architecture |
-
2018
- 2018-07-20 CN CN201810799768.8A patent/CN108880576A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109474731A (en) * | 2018-12-22 | 2019-03-15 | Oppo（重庆）智能科技有限公司 | Radio frequency adjustment method and Related product |
| WO2020216180A1 (en) * | 2019-04-25 | 2020-10-29 | 维沃移动通信有限公司 | Power detection circuit and terminal |
| WO2021056879A1 (en) * | 2019-09-23 | 2021-04-01 | 广州慧智微电子有限公司 | Radio-frequency front-end architecture |
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Application publication date: 20181123 |