CN114665256A - Antenna structure, mobile terminal and frequency band switching method - Google Patents
Antenna structure, mobile terminal and frequency band switching method Download PDFInfo
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- H—ELECTRICITY
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- H—ELECTRICITY
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- H01Q—ANTENNAS, i.e. RADIO AERIALS
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Abstract
The embodiment of the application provides an antenna structure, a mobile terminal and a frequency band switching method, and relates to the technical field of antennas. The first radiator and the second radiator of the antenna structure are arranged at intervals, one end of a feed-in end is connected to one end of the first radiator, the other end of the feed-in end is used for being connected with a first feed-in source, one end of a grounding end is connected to the first radiator, the other end of the grounding end is grounded through a first switching circuit, one end of a connecting end is connected to the second radiator, and the other end of the connecting end is grounded through a second switching circuit or connected to a second feed-in source; the first switching circuit and the second switching circuit are used for controlling the coupling and the isolation of the first radiator and the second radiator, so that the antenna structure can serve as two antennas to radiate signals of different feed sources, the number of the antennas is increased on the premise that the area of the antennas is not increased, even if part of the antennas are influenced by hand holding, the influenced antennas can be replaced by the antenna structure, and further the communication quality is stabilized.
Description
Technical Field
The present application relates to the field of antenna technologies, and in particular, to an antenna structure, a mobile terminal, and a frequency band switching method.
Background
At present, the frequency bands supported by the commercially available mobile phones are more, the number of antennas is also increased, and the antennas are distributed at each corner of the mobile phones. When a user holds a mobile phone, the problem of communication quality degradation caused by signal deterioration due to partial antenna influence by hand holding is easily caused.
Disclosure of Invention
In view of the above, an object of the present application is to provide an antenna structure, a mobile terminal and a frequency band switching method, so as to solve the above problems.
In order to achieve the above purpose, the embodiments of the present application employ the following technical solutions:
in a first aspect, an embodiment of the present application provides an antenna structure, where the antenna structure includes a first radiator, a second radiator, a feed-in terminal, a ground terminal, a connection terminal, a first switching circuit, and a second switching circuit, where the first radiator and the second radiator are disposed at an interval, one end of the feed-in terminal is connected to one end of the first radiator, the other end of the feed-in terminal is used to connect to a first feed-in source, one end of the ground terminal is connected to the first radiator, the other end of the ground terminal is grounded through the first switching circuit, one end of the connection terminal is connected to the second radiator, and the other end of the connection terminal is grounded through the second switching circuit or connected to a second feed-in source;
when the first switching circuit is switched to a first matching state and the second switching circuit is switched to a first state so as to enable the connecting end to be grounded, the feed-in end feeds in current from the first feed-in source to the first radiator so as to excite radiation signals of a first frequency band, a second frequency band and a third frequency band, and the second radiator obtains the current from the first radiator in a coupling mode so as to excite radiation signals of a fourth frequency band;
when the first switching circuit is switched to a second matching state and the second switching circuit is switched to a second state so that the connecting end is connected to the second feed-in source, the feed-in end feeds in the current to the first radiator to excite radiation signals of a second frequency band, a third frequency band and a fourth frequency band, and the connecting end feeds in the current from the second feed-in source to the second radiator to excite radiation signals of the fourth frequency band.
In an optional embodiment, the first switching circuit includes a first switch, the first switch includes a first fixed contact and a plurality of first movable contacts, the first fixed contact is connected to the other end of the ground terminal, and each of the first movable contacts is grounded through a different capacitance or inductance;
when the first switching circuit is switched to a first matching state, the first switching switch is used for generating different resonant frequencies through different connection modes of the first fixed contact and the plurality of first movable contacts;
when the first switching circuit is switched to a second matching state, the first switching switch is used for generating a state that the grounding end is grounded with zero ohm resistance by connecting the first fixed contact with at least one of the plurality of first movable contacts.
In an alternative embodiment, the second switching circuit includes a second switch, and the second switch includes a second fixed contact and two second movable contacts, the second fixed contact is connected to the other end of the connection end, one of the second movable contacts is grounded through a capacitor or an inductor, and the other second movable contact is connected to the second feed-in power supply.
In an optional implementation manner, the first radiator includes a first radiation portion, a second radiation portion, and a third radiation portion, the first radiation portion, the second radiation portion, and the third radiation portion are sequentially connected, one end of the feed terminal is connected to a connection portion of the first radiation portion and the second radiation portion, and one end of the ground terminal is connected to a connection portion of the second radiation portion and the third radiation portion;
when the first switching circuit is switched to a first matching state and the second switching circuit is switched to a first state so as to ground the connection terminal, the electroforming of the first radiation part flows to excite the radiation signal of the third frequency band, the electroforming of the second radiation part and the third radiation part flows to excite the radiation signal of the first frequency band, and the electroforming of the second radiation part and the third radiation part is coupled to the second radiation body so as to excite the radiation signal of the fourth frequency band;
when the first switching circuit is switched to a second matching state and the second switching circuit is switched to a second state so that the connection terminal is connected to the second feed-in source, the first feed-in source flows along the first radiation portion to excite the radiation signal of the fourth frequency band, and the current flows through the second radiation portion and the ground terminal to excite the radiation signal of the third frequency band and the second frequency band.
In a second aspect, an embodiment of the present application further provides a mobile terminal, where the mobile terminal includes a controller, an antenna module, a switch module, and the antenna structure according to any of the foregoing embodiments, the controller is electrically connected to the switch module, the first switching circuit, and the second switching circuit, respectively, the connection end is connected to the second feed-in source through the second switching circuit and the switch module, and the antenna module is connected to the second feed-in source through the switch module;
the controller is used for acquiring a current working frequency band;
the controller is further configured to control the switch module to switch the state, control the first switching circuit to switch to a second matching state, and control the second switching circuit to switch to the second state when it is detected that the antenna module is held and the current working frequency band matches a preset frequency band, so that the connection end feeds in current from the second feed-in source to the second radiator.
In an optional implementation manner, the antenna module includes a first antenna and a second antenna, and the second feed source includes a first sub-feed source and a second sub-feed source;
the controller is configured to control the switch module to switch to a first switch state, control the first switching circuit to switch to a second matching state, and control the second switching circuit to switch to a second state when it is detected that the first antenna is held and the current working frequency band matches a preset frequency band, so that the connection end feeds in current from the first sub feed-in source to the second radiator, and the second sub feed-in source feeds in current to the second antenna;
the controller is further configured to control the switch module to switch to a second switch state, control the first switching circuit to switch to a second matching state, and control the second switching circuit to switch to a second state when it is detected that the second antenna is held and the current working frequency band matches a preset frequency band, so that the connection end feeds in current from the second sub feed-in source to the second radiator, and the first sub feed-in source feeds in current to the first antenna.
In an optional implementation manner, the switch module includes two signal input terminals and three signal output terminals, one of the signal input terminals is connected to the first sub-feeding source, the other signal input terminal is connected to the second sub-feeding source, and the three signal output terminals are respectively connected to the first antenna, the second antenna, and the second switching circuit.
In an optional embodiment, the mobile terminal further includes a sensor module, and the sensor module is electrically connected to the controller;
the controller is used for acquiring the output signal of the sensor module, and when the change rate of the output signal is greater than or equal to a preset threshold value, the antenna module is determined to be held.
In an optional implementation manner, the mobile terminal further includes an antenna carrier, the first antenna and the second antenna are respectively located at two sides of one end of the antenna carrier, and the antenna structure is disposed at the other end of the antenna carrier.
In a third aspect, an embodiment of the present application further provides a frequency band switching method, which is applied to a mobile terminal in any of the foregoing embodiments, where the frequency band switching method includes:
acquiring a current working frequency band;
when it is detected that the antenna module is held and the current working frequency band is matched with a preset frequency band, controlling the switch module to switch to the second matching state, and controlling the first switching circuit to switch to the second matching state, so that the connecting end feeds in current from the second feed-in source to the second radiator.
The antenna structure provided by the embodiment of the application comprises a first radiator, a second radiator, a feed-in end, a grounding end, a connecting end, a first switching circuit and a second switching circuit, wherein the first radiator and the second radiator are arranged at intervals; by arranging the first switching circuit and the second switching circuit and controlling the coupling and the isolation of the first radiator and the second radiator through the first switching circuit and the second switching circuit, the antenna structure can serve as two antennas to radiate signals of different feed sources, namely the number of the antennas is increased on the premise of not increasing the area of the antennas, and even if part of the antennas are influenced by holding, the influenced antennas can be replaced through the antenna structure, and further the communication quality is stabilized.
The mobile terminal and the frequency band switching method provided by the embodiment of the application include a controller, an antenna module, a switch module and an antenna structure of any one of the above embodiments, wherein the controller is electrically connected with the switch module, the first switching circuit and the second switching circuit respectively, the connection end is connected to a second feed-in source through the second switching circuit and the switch module, the controller is used for obtaining a current working frequency band, and the controller is further used for controlling the switching state of the switch module, controlling the first switching circuit to be switched to a second matching state and controlling the second switching circuit to be switched to the second state when the antenna module is detected to be held and the current working frequency band is matched with a preset frequency band, so that the connection end is enabled to feed in source current to the second radiator from the second feed-in source. Because when detecting that the antenna module is held, can make second irradiator radiation second feed-in source through the state of control switch module, first switching circuit and second switching circuit to under the condition that does not increase the antenna area, improve the poor problem of signal that the antenna module is held and leads to through multiplexing antenna structure, give better use experience of user.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 shows a schematic diagram of antenna distribution of a mobile phone in the prior art.
Fig. 2 shows a schematic structural diagram of an antenna structure provided in an embodiment of the present application.
Fig. 3 shows a further structural schematic diagram of the antenna structure provided in the embodiment of the present application.
Fig. 4 shows a current path diagram of the antenna structure provided by the embodiment of the present application when the antenna structure is in the first mode.
Fig. 5 shows a current path diagram of the antenna structure provided by the embodiment of the present application when the antenna structure is in the second mode.
Fig. 6 and 7 show reflection loss and radiation efficiency, respectively, of the antenna structure when the antenna structure is in the first mode.
Fig. 8 and 9 show reflection loss and radiation efficiency of the first radiator, respectively, when the antenna structure is in the second mode.
Fig. 10 and 11 show reflection loss and radiation efficiency, respectively, of the second radiator when the antenna structure is in the second mode.
Fig. 12 shows the reflection loss and the antenna isolation of the first radiator and the second radiator when the antenna structure is in the second mode.
Fig. 13 shows the antenna radiation patterns of the first radiator and the second radiator when the antenna structure is in the second mode.
Fig. 14 shows a block diagram of a circuit structure of a mobile terminal according to an embodiment of the present application.
Fig. 15 is a schematic structural diagram of a mobile terminal when a switch module provided in an embodiment of the present application is switched to a first switch state.
Fig. 16 is a schematic structural diagram of the mobile terminal when the switch module switches to the second switch state according to the embodiment of the present application.
Fig. 17 shows a flowchart of a frequency band switching method according to an embodiment of the present application.
Icon: 100-an antenna structure; 110-a first radiator; 112-a first radiating portion; 114-a second radiating portion; 116-a third radiating portion; 120-a second radiator; 130-a feed-in terminal; 140-ground; 150-a connection end; 160-a first switching circuit; 170-a second switching circuit; 200-a mobile terminal; 210-a controller; 220-a switch module; 230-an antenna module; 232-a first antenna; 234-second antenna.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It will also be noted that when an element is referred to as being "electrically connected" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "electrically connected" to another element, it can be connected by contact, e.g., by wires, or by contactless connection, e.g., by contactless coupling.
As shown in fig. 1, a mobile phone typically includes 4 antennas and is distributed at four corners of the antennas. The four antennas are ANT1, ANT2, ANT3 and ANT 4. However, when the mobile phone operates in an LTE (Long Term Evolution) network or a 5G NR (New Radio, New air interface) 4x4MIMO (multiple-in multiple-out) mode, the performance of one or two antennas may be affected by the hand-holding.
For example, when a user holds a mobile phone in the manner shown in fig. 1, the signal of one antenna, ANT4, will be affected, which results in a deterioration of 4 × 4MIMO downlink throughput and an impact on user experience.
Therefore, the present embodiment provides an antenna structure 100, a mobile terminal 200 and a frequency band switching method, which are used for increasing the number of antennas without increasing the area of the antennas, so as to improve the signal quality when the antennas are held.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments and features of the embodiments described below can be combined with each other without conflict.
Please refer to fig. 2, which is a schematic structural diagram of an antenna structure 100 according to an embodiment of the present application, which can be applied to a mobile terminal 200, such as a mobile phone, for transmitting and receiving radio waves to transmit and exchange wireless signals.
The antenna structure 100 includes a first radiator 110, a second radiator 120, a feeding terminal 130, a ground terminal 140, a connection terminal 150, a first switching circuit 160, and a second switching circuit 170, where the first radiator 110 and the second radiator 120 are disposed at an interval, one end of the feeding terminal 130 is connected to one end of the first radiator 110, the other end of the feeding terminal 130 is used to connect to a first feeding source SIGNAL1, one end of the ground terminal 140 is connected to the first radiator 110, the other end of the ground terminal 140 is grounded through the first switching circuit 160, one end of the connection terminal 150 is connected to a second radiation source SIGNAL, and the other end of the connection terminal 150 is grounded through the second switching circuit 170 or connected to a second feeding source SIGNAL 2.
The first radiator 110 is configured to receive a SIGNAL or a current excitation radiation SIGNAL fed according to a first feeding source SIGNAL 1. It should be noted that the first radiator 110 may be an integrally formed metal sheet, or may be a Laser Direct Structuring (LDS) antenna, and for convenience of describing the structure, the first radiator 110 is divided into a plurality of radiating portions for illustration. Referring to fig. 3, the first radiator 110 includes a first radiation portion 112, a second radiation portion 114, and a third radiation portion 116, and the first radiation portion 112, the second radiation portion 114, and the third radiation portion 116 are sequentially connected, one end of a feed terminal 130 is connected to a connection portion of the first radiation portion 112 and the second radiation portion 114, one end of a ground terminal 140 is connected to a connection portion of the second radiation portion 114 and the third radiation portion 116, and the third radiation portion 116 and the second radiator 120 are disposed at an interval.
Similarly, the second radiator 120 is configured to receive a SIGNAL according to the current excitation radiation SIGNAL coupled by the first radiator 110 or the current excitation radiation SIGNAL fed by the second feeding source SIGNAL 2. In addition, the second radiator 120 may be an integrally formed metal sheet, or may be an LDS antenna.
One end of the feeding terminal 130 is electrically connected to the first radiating portion 112, and the other end of the feeding terminal 130 is used for connecting to a first feeding source SIGNAL 1. In an alternative embodiment, the feeding end 130 may be a metal dome.
One end of the ground terminal 140 is connected to the first radiator 110, and the other end of the ground terminal 140 is grounded through the first switching circuit 160. Specifically, as shown in fig. 3, one end of the ground terminal 140 is connected to the connection portion of the second radiation portion 114 and the third radiation portion 116. In an alternative embodiment, the ground terminal 140 may be a metal spring.
One end of the connection terminal 150 is connected to the second radiator 120, and the other end of the connection terminal 150 is grounded or connected to the second feed source SIGNAL2 through the second switching circuit 170. In an alternative embodiment, the connecting end 150 may be a metal spring.
With reference to fig. 3, the first switching circuit 160 includes a first switch, which includes a first fixed contact and a plurality of first movable contacts, the first fixed contact is connected to the other end of the ground terminal 140, and each of the first movable contacts is grounded through a different capacitor or inductor.
In the embodiment of the present application, the first switching circuit 160 includes two matching states. When the first switching circuit 160 is switched to the first matching state, the first switching switch is configured to generate different resonant frequencies through different connection modes of the first fixed contact and the plurality of first movable contacts; it should be noted that when the first switching circuit 160 is switched to the first matching state, the first radiator 110 and the second radiator 120 are in a coupling state, and the current on the first radiator 110 can be coupled to the second radiator 120.
When the first switching circuit 160 is switched to the second matching state, the first switching switch is configured to generate a zero ohm resistance ground state of the ground terminal 140 by connecting the first stationary contact with at least one of the plurality of first movable contacts; it should be noted that, when the first switching circuit 160 is switched to the second matching state, the first radiator 110 and the second radiator 120 are in an isolated state, and the current on the first radiator 110 cannot be coupled to the second radiator 120.
The second switching circuit 170 includes a second switch, which includes a second fixed contact and two second movable contacts, the second fixed contact is connected to the other end of the connection terminal 150, one of the second movable contacts is grounded through a capacitor or an inductor, and the other second movable contact is connected to a second feed SIGNAL 2.
In the embodiment of the present application, the second switching circuit 170 includes two states. When the second switch is in the first state, the second fixed contact is connected to one of the second movable contacts (the second movable contact connected to the capacitor or the inductor), and the connection terminal 150 may be grounded through the second switch; when the second switch is in the second switching state, the second fixed contact is connected to another second movable contact (the second movable contact connected to the second feed source SIGNAL 2), the connection terminal 150 may be connected to the second feed source SIGNAL2, and the second feed source SIGNAL2 may feed current from the connection terminal 150 to the second radiator 120.
Therefore, according to the states of the first switch and the second switch, the antenna structure 100 can have the first mode and the second mode, and the radiation frequency bands of the antenna structure 100 in the first mode and the second mode are different.
When the antenna structure 100 is in the first mode, the first switching circuit 160 is switched to the first matching state and the second switching circuit 170 is switched to the first state, so that the connection terminal 150 is grounded. At this time, the feeding terminal 130 feeds current from the first feeding source SIGNAL1 to the first radiator 110 to excite radiation SIGNALs of the first frequency band, the second frequency band and the third frequency band, and the second radiator 120 obtains current from the first radiator 110 by coupling, so as to excite radiation SIGNALs of the fourth frequency band.
When the antenna structure 100 is in the second mode, the first switching circuit 160 is switched to the second matching state and the second switching circuit 170 is switched to the second state, so that the connection terminal 150 is connected to the second feed-in source SIGNAL 2. At this time, the feeding terminal 130 feeds a current to the first radiator 110 to excite the radiation SIGNALs of the second frequency band, the third frequency band and the fourth frequency band, and the connection terminal 150 feeds a current from the second feeding source SIGNAL2 to the second radiator 120 to excite the radiation SIGNALs of the fourth frequency band.
The first frequency band, the second frequency band, the third frequency band and the fourth frequency band are sequentially increased and respectively include a Low Band (LB), a Middle Band (MB), a High Band (HB) and an Ultra High Band (UHB). In an alternative embodiment, the first frequency band may be a frequency band lower than 1 Ghz; the middle frequency band can be 1 GHz-2.2 GHz; the high frequency band can be 2.2 GHz-2.7 GHz; the ultrahigh frequency band can be a frequency band of 2.7 GHz-3.8 GHz.
Specifically, please refer to fig. 4, which is a current path diagram of the antenna structure 100 in the first mode. When the antenna structure 100 is in the first mode, the feeding terminal 130 feeds a current from the first feeding source SIGNAL1, the current is fed into the first radiator 110, flows along the first radiation portion 112 to excite a radiation SIGNAL in the third frequency band, flows along the second radiation portion 114 to the ground terminal 140 to excite a radiation SIGNAL in the second frequency band, flows along the second radiation portion 114 to the third radiation portion 116 to excite a radiation SIGNAL in the first frequency band, and flows along the second radiator 120 to excite a radiation SIGNAL in the fourth frequency band after being coupled to the second radiator 120.
Fig. 5 is a current path diagram of the antenna structure 100 in the second mode. When the antenna structure 100 is in the second mode, the feeding terminal 130 feeds a current from the first feeding source SIGNAL1, and after the current is fed into the first radiator 110, the current flows along the first radiation portion 112 to excite the radiation SIGNAL of the fourth frequency band, and flows along the second radiation portion 114 to the ground terminal 140 to excite the radiation SIGNALs of the second frequency band and the third frequency band; the connection terminal 150 feeds a current from the second feeding source SIGNAL2, and the current flows along the second radiator 120 to excite the radiation SIGNAL of the fourth frequency band.
Referring to fig. 6 and 7, the reflection Loss (Return Loss) and the radiation Efficiency (Efficiency) of the antenna structure 100 when the antenna structure 100 is in the first mode are shown. Referring to fig. 8 and 9, the reflection loss and the radiation efficiency of the first radiator 110 are respectively shown when the antenna structure 100 is in the second mode; referring to fig. 10 and 11, the reflection loss and the radiation efficiency of the second radiator 120 when the antenna structure 100 is in the second mode are shown respectively (in the drawing, the first radiator 110 is ANT1, and the second radiator 120 is ANT 1'). It can be seen that when the antenna structure 100 is in the first mode, the low frequency band, the middle frequency band, the high frequency band, and the ultrahigh frequency band have lower reflection loss and higher radiation efficiency; while the antenna structure 100 is in the second mode, the first radiator 110 has lower reflection loss and higher radiation efficiency in the middle frequency band, the high frequency band and the ultrahigh frequency band, and the second radiator 120 has lower reflection loss and higher radiation efficiency only in the ultrahigh frequency band. Put another way, the radiation frequency bands of the antenna structure 100 in the first mode and the second mode are different.
Referring to fig. 12, the reflection loss and the antenna isolation of the first radiator 110 and the second radiator 120 are shown when the antenna structure 100 is in the second mode. Where S1,1 is the reflection loss of the second radiator 120, S3,3 is the reflection loss of the first radiator 110, and S2,1 is the antenna isolation between the first radiator 110 and the second radiator 120. It can be seen that, in the ultra high frequency band, the isolation between the first radiator 110 and the second radiator 120 is high, and the coupling degree between the first radiator 110 and the second radiator 120 is low.
Referring to fig. 13, the antenna radiation patterns of the first radiator 110 and the second radiator 120 are shown when the antenna structure 100 is in the second mode. It can be seen that the first radiator 110 and the second radiator 120 have a large difference in radiation patterns, i.e., different radiation directions.
It can be understood that, in the antenna structure 100 provided in the embodiment of the present application, the first switching circuit 160 and the second switching circuit 170 are disposed, and the first switching circuit 160 and the second switching circuit 170 control the coupling and the isolation between the first radiator 110 and the second radiator 120, so that the antenna structure 100 can serve as two antennas to radiate signals of different feeding sources, that is, the number of antennas is increased on the premise of not increasing the area of the antennas, and even if some antennas are affected by hand holding, the affected antennas can be replaced by the antenna structure 100, thereby stabilizing the communication quality.
Fig. 14 is a block diagram of a circuit structure of a mobile terminal 200 according to an embodiment of the present disclosure. The mobile terminal 200 includes a controller 210, an antenna module 230, a switch module 220, and the antenna structure 100 (as shown in fig. 2) in the above-mentioned embodiment, wherein the controller 210 is electrically connected to the switch module 220, the first switching circuit 160 and the second switching circuit 170, the connection terminal 150 is connected to the second feeding source SIGNAL2 through the second switching circuit 170 and the switch module 220, and the antenna module 230 is connected to the second feeding source SIGNAL2 through the switch module 220.
The controller 210 is configured to obtain a current operating frequency band.
It should be noted that the mobile terminal 200 may interact with the base station to obtain the frequency band information issued by the base station. Accordingly, the controller 210 may determine the current operating frequency band of the mobile terminal 200 through the frequency band information.
The controller 210 is further configured to control the switch module 220 to switch the state, control the first switching circuit 160 to switch to the second matching state, and control the second switching circuit 170 to switch to the second state when it is detected that the antenna module 230 is held and the current working frequency band matches the preset frequency band, so that the connection terminal 150 feeds the current from the second feeding source SIGNAL2 to the second radiator 120.
The operation scenes supported by the commercially available mobile phone comprise the following scenes: UHB, MB and UHB combinations, HB and UHB combinations, MB and UHB combinations, HB and UHB combinations, LB, MB and UHB combinations, and LB, HB and UHB combinations.
The inventor researches and discovers that the operation scene of the LB and UHB coexistence in each combination is only 3 of the LB and UHB combination, the LB, MB and UHB combination and the LB, HB and UHB combination, and the occupation ratio in all the combinations is about 33.3%. Therefore, in an alternative embodiment, LB may be used as the preset frequency band, so that when the mobile terminal 200 does not operate in an operation scenario where LB and UHB coexist, the reception performance of the UHB signal without LB signal may be improved by multiplexing the antenna structure 100.
In an alternative embodiment, the mobile terminal 200 further includes a sensor module, the sensor module is electrically connected to the controller 210, and the controller 210 is configured to obtain an output signal of the sensor module, and determine that the antenna module 230 is held when a change rate of the output signal is greater than or equal to a preset threshold.
In another alternative embodiment, the controller 210 may determine whether the antenna module 230 is held by determining the signal quality of the antenna module 230. Specifically, when the signal quality of the antenna module 230 is degraded, it can be determined that the antenna module 230 is held.
Please refer to fig. 15, which is a schematic structural diagram of a mobile terminal 200 according to an embodiment of the present application. The antenna module 230 includes a first antenna 232 and a second antenna 234, the second feed-in source SIGNAL2 includes a first sub-feed-in source SIGNAL2_1 and a second sub-feed-in source SIGNAL2_2, the switch module 220 includes two SIGNAL inputs and three SIGNAL outputs, one of the SIGNAL inputs is connected to the first sub-feed-in source SIGNAL2_1, the other SIGNAL input is connected to the second sub-feed-in source SIGNAL2_2, and the three SIGNAL outputs are respectively connected to the first antenna 232, the second antenna 234 and the second switching circuit 170.
The switch module 220 at least includes a first switch state, a second switch state, and a third switch state by combining the two signal input terminals and the three signal output terminals. When the switch module 220 is switched to the first switch state, the SIGNAL input terminal connected to the first sub-feed-in source SIGNAL2_1 is connected to the SIGNAL output terminal connected to the second switch circuit 170, and the SIGNAL input terminal connected to the second sub-feed-in source SIGNAL2_2 is connected to the SIGNAL output terminal connected to the second antenna 234 (as shown in fig. 15).
When the switch module 220 is switched to the second switch state, the SIGNAL input terminal connected to the first sub-feed-in source SIGNAL2_1 is connected to the SIGNAL output terminal connected to the first antenna 232, and the SIGNAL input terminal connected to the second sub-feed-in source SIGNAL2_2 is connected to the SIGNAL output terminal connected to the second switch circuit 170 (as shown in fig. 16).
When the switch module 220 is switched to the third switch state, the SIGNAL input terminal connected to the first sub-feed-in source SIGNAL2_1 is connected to the SIGNAL output terminal connected to the first antenna 232, and the SIGNAL input terminal connected to the second sub-feed-in source SIGNAL2_2 is connected to the SIGNAL output terminal connected to the second antenna 234. It can be understood that, when the mobile terminal 200 is in the normal operation mode, i.e. neither the first antenna 232 nor the second antenna 234 is held, the controller 210 controls the switch module 220 to switch to the third switch state.
The controller 210 is configured to control the switch module 220 to switch to the first switch state, control the first switching circuit 160 to switch to the second matching state, and control the second switching circuit 170 to switch to the second state when it is detected that the first antenna 232 is held and the current working frequency band matches the preset frequency band, so that the connection terminal 150 feeds a current from the first sub-feed source SIGNAL2_1 to the second radiator 120, and the second sub-feed source SIGNAL2_2 feeds a current to the second antenna 234. As can be understood, referring to fig. 15 and fig. 5, when it is detected that the first antenna 232 is held and the current operating frequency band matches the preset frequency band, the switch module 220 is controlled to switch to the first switch state, so that the first sub-feed source SIGNAL2_1 can be transmitted to the second switch circuit 170, and the second sub-feed source SIGNAL2_2 feeds current to the second antenna 234; meanwhile, the first switching circuit 160 is controlled to switch to the second matching state, and the second switching circuit 170 is controlled to switch to the second state, so that the first sub-feed source SIGNAL2_1 feeds current from the connection terminal 150 to the second radiator 120 through the second switching circuit 170, and thus, when the first antenna 232 is held, the first sub-feed source SIGNAL2_1 is radiated by the first antenna 232 and is changed into radiation by the second radiator 120, and SIGNAL quality is ensured.
The controller 210 is further configured to control the switch module 220 to switch to the second switch state when it is detected that the second antenna 234 is held and the current working frequency band matches the preset frequency band, so that the connection terminal 150 feeds the current from the second sub-feed-in source SIGNAL2_2 to the second radiator 120, and the first sub-feed-in source SIGNAL2_1 feeds the current to the first antenna 232.
As can be understood from fig. 16 and fig. 5, when it is detected that the second antenna 234 is held and the current operating frequency band matches the preset frequency band, the switch module 220 is controlled to switch to the second switch state, so that the second sub-feed-in source SIGNAL2_2 can be transmitted to the second switch circuit 170, and the first sub-feed-in source SIGNAL2_1 feeds current into the first antenna 232; meanwhile, the first switching circuit 160 is controlled to switch to the second matching state, and the second switching circuit 170 is controlled to switch to the second state, so that the second sub-feed source SIGNAL2_2 feeds current from the connection terminal 150 to the second radiator 120 through the second switching circuit 170, and thus, when the second antenna 234 is held, the second sub-feed source SIGNAL2_2 is radiated by the second antenna 234 to be radiated by the second radiator 120, and the SIGNAL quality is ensured.
It should be noted that the sensor module may include a first sensor and a second sensor, and the controller 210 is electrically connected to both the first sensor and the second sensor, wherein the controller 210 is configured to acquire a first output signal of the first sensor and a second output signal of the second sensor, determine that the first antenna 232 is held when a change rate of the first output signal is greater than or equal to a preset threshold, and determine that the second antenna 234 is held when a change rate of the second output signal is greater than or equal to a preset threshold. It should be noted that whether the first antenna 232 and the second antenna 234 are held or not may also be determined by the signal quality of the first antenna 232 and the second antenna 234, which is not described herein again.
In an alternative embodiment, the mobile terminal 200 further includes an antenna carrier, the first antenna 232 and the second antenna 234 are respectively disposed at two sides of one end of the antenna carrier, and the antenna structure 100 is disposed at the other end of the antenna carrier.
The embodiment of the present application further provides a frequency band switching method, which is applied to the mobile terminal 200 in the foregoing embodiment. Please refer to fig. 17, which is a flowchart of a frequency band switching method according to an embodiment of the present disclosure. The frequency band switching method comprises the following steps:
s501, obtaining a current working frequency range.
S502, when it is detected that the antenna module 230 is held and the current working frequency band matches the preset frequency band, the switch module 220 is controlled to switch the state, the first switching circuit 160 is controlled to switch to the second matching state, and the second switching circuit 170 is controlled to switch to the second state, so that the connection terminal 150 feeds the current from the second feeding source SIGNAL2 to the second radiator 120.
Therefore, the mobile terminal and the frequency band switching method provided in the embodiment of the present application include a controller, an antenna module, a switch module, and an antenna structure according to any of the foregoing embodiments, where the controller is electrically connected to the switch module, the first switching circuit, and the second switching circuit, respectively, and the connection end is connected to a second feed-in source through the second switching circuit and the switch module, and the controller is configured to obtain a current working frequency band, and when it is detected that the antenna module is held and the current working frequency band matches a preset frequency band, control a switching state of the switch module, control the first switching circuit to switch to a second matching state, and control the second switching circuit to switch to a second state, so that the connection end is fed in current from the second feed-in source to the second radiator. Because when detecting that the antenna module is held, can make second irradiator radiation second feed-in source through the state of control switch module, first switching circuit and second switching circuit to under the condition that does not increase the antenna area, improve the poor problem of signal that the antenna module is held and leads to through multiplexing antenna structure, give better use experience of user.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An antenna structure is characterized in that the antenna structure comprises a first radiator, a second radiator, a feed-in end, a ground end, a connecting end, a first switching circuit and a second switching circuit, wherein the first radiator and the second radiator are arranged at intervals;
when the first switching circuit is switched to a first matching state and the second switching circuit is switched to a first state so as to enable the connecting end to be grounded, the feed-in end feeds in current from the first feed-in source to the first radiator so as to excite radiation signals of a first frequency band, a second frequency band and a third frequency band, and the second radiator obtains the current from the first radiator in a coupling mode so as to excite radiation signals of a fourth frequency band;
when the first switching circuit is switched to a second matching state and the second switching circuit is switched to a second state so that the connecting end is connected to the second feed-in source, the feed-in end feeds in the current to the first radiator to excite radiation signals of a second frequency band, a third frequency band and a fourth frequency band, and the connecting end feeds in the current from the second feed-in source to the second radiator to excite radiation signals of the fourth frequency band.
2. The antenna structure according to claim 1, wherein the first switching circuit comprises a first switch including a first stationary contact and a plurality of first movable contacts, the first stationary contact being connected to the other end of the ground terminal, each of the first movable contacts being grounded through a different capacitance or inductance;
when the first switching circuit is switched to a first matching state, the first switching switch is used for generating different resonant frequencies through different connection modes of the first fixed contact and the plurality of first movable contacts;
when the first switching circuit is switched to a second matching state, the first switching switch is used for generating a state that the grounding end is grounded with zero ohm resistance by connecting the first fixed contact with at least one of the plurality of first movable contacts.
3. The antenna structure according to claim 1, wherein the second switching circuit comprises a second switch, the second switch comprises a second fixed contact and two second movable contacts, the second fixed contact is connected with the other end of the connection terminal, one of the second movable contacts is grounded through a capacitor or an inductor, and the other second movable contact is connected to the second feed source.
4. The antenna structure according to any one of claims 1 to 3, wherein the first radiator includes a first radiation portion, a second radiation portion, and a third radiation portion, the first radiation portion, the second radiation portion, and the third radiation portion are sequentially connected, one end of the feed terminal is connected to a connection portion of the first radiation portion and the second radiation portion, and one end of the ground terminal is connected to a connection portion of the second radiation portion and the third radiation portion;
when the first switching circuit is switched to a first matching state and the second switching circuit is switched to a first state so as to ground the connection terminal, the electroforming of the first radiation part flows to excite the radiation signal of the third frequency band, the electroforming of the second radiation part and the third radiation part flows to excite the radiation signal of the first frequency band, and the electroforming of the second radiation part and the third radiation part is coupled to the second radiation body so as to excite the radiation signal of the fourth frequency band;
when the first switching circuit is switched to a second matching state and the second switching circuit is switched to a second state so that the connection terminal is connected to the second feed-in source, the first feed-in source flows along the first radiation portion to excite the radiation signal of the fourth frequency band, and the current flows through the second radiation portion and the ground terminal to excite the radiation signal of the third frequency band and the second frequency band.
5. A mobile terminal, comprising a controller, an antenna module, a switch module, and the antenna structure according to any one of claims 1-4, wherein the controller is electrically connected to the switch module, the first switching circuit, and the second switching circuit, respectively, and the connection terminal is connected to the second feeding source through the second switching circuit and the switch module, and the antenna module is connected to the second feeding source through the switch module;
the controller is used for acquiring a current working frequency band;
the controller is further configured to control the switch module to switch the state, control the first switching circuit to switch to a second matching state, and control the second switching circuit to switch to the second state when it is detected that the antenna module is held and the current working frequency band matches a preset frequency band, so that the connection end feeds in current from the second feed-in source to the second radiator.
6. The mobile terminal of claim 5, wherein the antenna module comprises a first antenna and a second antenna, and the second feeding source comprises a first sub-feeding source and a second sub-feeding source;
the controller is configured to control the switch module to switch to a first switch state, control the first switching circuit to switch to a second matching state, and control the second switching circuit to switch to a second state when it is detected that the first antenna is held and the current working frequency band matches a preset frequency band, so that the connection end feeds in current from the first sub feed-in source to the second radiator, and the second sub feed-in source feeds in current to the second antenna;
the controller is further configured to control the switch module to switch to a second switch state, control the first switching circuit to switch to a second matching state, and control the second switching circuit to switch to a second state when it is detected that the second antenna is held and the current working frequency band matches a preset frequency band, so that the connection end feeds in current from the second sub feed-in source to the second radiator, and the first sub feed-in source feeds in current to the first antenna.
7. The mobile terminal of claim 6, wherein the switch module comprises two signal inputs and three signal outputs, one of the signal inputs is connected to the first sub-feeding source, the other signal input is connected to the second sub-feeding source, and the three signal outputs are respectively connected to the first antenna, the second antenna and the second switching circuit.
8. The mobile terminal of claim 6, further comprising a sensor module electrically connected to the controller;
the controller is used for acquiring the output signal of the sensor module, and when the change rate of the output signal is greater than or equal to a preset threshold value, the antenna module is determined to be held.
9. The mobile terminal according to any of claims 6-8, wherein the mobile terminal further comprises an antenna carrier, the first antenna and the second antenna are respectively located at two sides of one end of the antenna carrier, and the antenna structure is disposed at the other end of the antenna carrier.
10. A method for switching frequency band, applied to a mobile terminal according to any one of claims 5 to 9, the method comprising:
acquiring a current working frequency band;
when it is detected that the antenna module is held and the current working frequency band is matched with a preset frequency band, controlling the switch module to switch to the second matching state, and controlling the first switching circuit to switch to the second matching state, so that the connecting end feeds in current from the second feed-in source to the second radiator.
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