CN106877832A

CN106877832A - Antenna load matching process and device, communication terminal

Info

Publication number: CN106877832A
Application number: CN201710076470.XA
Authority: CN
Inventors: 刘江; 王国涛
Original assignee: Hisense Mobile Communications Technology Co Ltd
Current assignee: Hisense Mobile Communications Technology Co Ltd
Priority date: 2017-02-13
Filing date: 2017-02-13
Publication date: 2017-06-20

Abstract

The present invention discloses a kind of antenna load matching process and device, communication terminal, belongs to the communications field.Communication terminal includes wave filter and antenna load coalignment, and antenna load coalignment includes：Processing unit, impedance matching circuit and load acquiring unit, the input of impedance matching circuit are connected with the output end of wave filter, load acquiring unit, and the antenna environment for obtaining communication terminal is loaded；Processing unit, for being loaded according to antenna environment, inquires about default load and the corresponding relation of matching impedance, and object matching impedance is determined according to Query Result, and the impedance of impedance matching circuit is set into object matching impedance.The present invention solves the problems, such as that the applicability of communication terminal is poor, improves the applicability of communication terminal.The present invention is matched for the antenna load of communication terminal.

Description

Antenna load matching process and device, communication terminal

Technical field

The present invention relates to the communications field, more particularly to a kind of antenna load matching process and device, communication terminal.

Background technology

With the development of the communication technology, the communication terminal such as mobile phone, panel computer is more and more universal.Lead in communication terminal Often including antenna, wave filter (or duplexer) and match circuit etc., when the impedance of match circuit is matched with antenna load, communication The S11 parameter curves of the wave filter (or duplexer) of terminal have preferable convergence, the better performances of communication terminal.Wherein, Same antenna antenna load difference (that is to say that antenna load is influenceed by antenna local environment) in different environments, therefore day Linear load is also called antenna environment load.

In order to ensure the convergence of the S11 parameter curves of wave filter, it usually needs the impedance to match circuit is adjusted, To cause impedance and the antenna environment load matched of match circuit.At present in the R＆D process of communication terminal, technical staff can To set antenna environment load for 50 ohm, the then impedance to match circuit is adjusted until the S11 parameters of wave filter are bent Line is restrained, and the impedance of match circuit is defined as optimal impedance when the S11 parameter curves of wave filter are restrained, based on the optimal resistance Anti- manufacture communication terminal simultaneously comes into operation, wherein, the impedance of the match circuit of the communication terminal that manufacture is obtained is the optimal impedance.

Current optimal impedance only can be with 50 ohm of antenna environment load matched, and it only ensure that antenna environment is born Carry for 50 ohm when wave filter S11 parameter curves convergence, when antenna environment load change when, the S11 of wave filter The convergence of parameter curve is deteriorated, and communication terminal is during use, and antenna environment load is ever-changing, therefore, antenna The wave filter Optimum Matching that environmental loads is debugged when being 50 ohm, does not ensure that the S11 parameter curves of wave filter in any day Under thread environment load, preferable convergence can be kept.So, the applicability of communication terminal is poor.

The content of the invention

In order to the applicability for solving the problems, such as communication terminal is poor, the present invention provides a kind of antenna load matching process and dress Put, communication terminal.The technical scheme is as follows：

A kind of first aspect, there is provided antenna load coalignment, for communication terminal, the communication terminal includes wave filter With the antenna load coalignment, the antenna load coalignment includes：Processing unit, impedance matching circuit and load are obtained Unit is taken, the input of the impedance matching circuit is connected with the output end of the wave filter,

The load acquiring unit, the antenna environment for obtaining communication terminal is loaded；

The processing unit, for being loaded according to the antenna environment, inquires about default load corresponding with matching impedance Relation, object matching impedance is determined according to Query Result, and the impedance of the impedance matching circuit is set into the object matching Impedance.

A kind of second aspect, there is provided antenna load matching process, for communication terminal, the communication terminal includes wave filter With the antenna load coalignment described in first aspect, the antenna load coalignment includes：Processing unit, impedance matching electricity Road and load acquiring unit, methods described include：

The load acquiring unit obtains the antenna environment load of communication terminal；

The processing unit is loaded according to the antenna environment, inquires about default antenna load pass corresponding with matching impedance System；

The processing unit determines object matching impedance according to Query Result；

The impedance of the impedance matching circuit is set to the object matching impedance by the processing unit.

The third aspect, there is provided a kind of communication terminal, the communication terminal includes：Antenna described in wave filter and first aspect Load matching device.

The beneficial effect brought of technical scheme that the present invention is provided is：

Antenna load matching process and device, communication terminal that the present invention is provided, due to the input of impedance matching circuit It is connected with the output end of wave filter, load acquiring unit can obtain the antenna environment load of communication terminal, and processing unit can Loaded according to antenna environment, inquire about the corresponding relation of default load and matching impedance and object matching is determined according to Query Result Impedance, object matching impedance is set to by the impedance of impedance matching circuit, therefore, processing unit can be loaded according to antenna environment The impedance of impedance matching circuit is adjusted, the impedance of impedance matching circuit is matched with antenna load, it is ensured that the filtering of communication terminal The S11 parameter curves of device convergence in different environments, improves the applicability of communication terminal.

It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary, this can not be limited Invention.

Brief description of the drawings

Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings Accompanying drawing.

Fig. 1 is a kind of structural representation of communication terminal that each embodiment of the invention is related to；

Fig. 2 is a kind of block diagram of antenna load coalignment provided in an embodiment of the present invention；

Fig. 3 is a kind of block diagram for loading acquiring unit provided in an embodiment of the present invention；

Fig. 4 is a kind of schematic diagram of signal coupling module provided in an embodiment of the present invention；

Fig. 5 is a kind of structural representation of impedance matching circuit provided in an embodiment of the present invention；

Fig. 6 is the structural representation of another impedance matching circuit provided in an embodiment of the present invention；

Fig. 7 is the structural representation of another impedance matching circuit provided in an embodiment of the present invention；

Fig. 8 is a kind of equivalent circuit diagram of the impedance matching circuit shown in Fig. 5；

Fig. 9 is another equivalent circuit diagram of the impedance matching circuit shown in Fig. 5；

Figure 10 is another equivalent circuit diagram of the impedance matching circuit shown in Fig. 5；

Figure 11 is another equivalent circuit diagram of the impedance matching circuit shown in Fig. 5；

Figure 12 is a kind of S11 parametric plots provided in an embodiment of the present invention；

Figure 13 is a kind of S11 parametric plots that correlation technique is provided；

Figure 14 is another S11 parametric plots provided in an embodiment of the present invention；

Figure 15 is a kind of method flow diagram of antenna load matching process provided in an embodiment of the present invention.

Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows and meets implementation of the invention Example, and be used to explain principle of the invention together with specification.

Specific embodiment

In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into One step ground is described in detail, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole implementation Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made All other embodiment, belongs to the scope of protection of the invention.

In the R＆D process of communication terminal, generally only in antenna environment load for 50 ohm ideally to communicating eventually The convergence of the S11 parameter curves of the wave filter (or duplexer) at end is debugged, and this method can ensure antenna environment Load for 50 ohm when wave filter S11 parameter curves convergence.But, communication terminal is in the ring residing for actually used process Border is Protean, and the antenna environment load of communication terminal is also real-time change.Therefore, the above method is merely able to ensure day When thread environment load is 50 ohm, the convergence of the S11 parameter curves of wave filter, it is impossible to ensure to be loaded in other antenna environments Under, the convergence of the S11 parameter curves of wave filter, this will cause in the case where other antenna environments are loaded, the index of communication terminal Deteriorate.Specifically, when the convergence of the S11 parameter curves of wave filter is deteriorated, the insertion loss of the physical path of communication terminal Increase, and then cause the receiving sensitivity of communication terminal to deteriorate, the power amplifier (English of communication terminal：Power Amplifier；Referred to as：PA power output increase), the power consumption of communication terminal increases.Meanwhile, the S11 parameter curves of wave filter Convergence be deteriorated also result in PA adjacent channel leakage ratio (English：Adjacent Channel Leakage Ratio；Letter Claim：ACLR) index, power gain index etc. deteriorate, and PA power gains are deteriorated can cause the increase of PA circuits operating current, and communication is eventually The power consumption at end is increased, and on the premise of battery capacity is certain, standby time and the duration of call of communication terminal will shorten；PA's ACLR indexs deteriorate, and will have a strong impact on the user capacity of base station cell where communication terminal, cause local resource to waste.

Fig. 1 is refer to, a kind of structural representation of the communication terminal being related to it illustrates each embodiment of the invention, this leads to Letter terminal can be the terminals such as mobile phone, panel computer.Referring to Fig. 1, the communication terminal includes：Central processing unit, transceiver, power Amplifier, wave filter (or duplexer), impedance matching circuit, TX/RX (Chinese：Transmitting/receive；English：Transport/ Receive) switch, power coupler, coupler switch, variable impedance, memory, peripheral circuit, sensor unit and antenna Deng.

Wherein, memory be used for data storage, the data be such as, but not limited to terminal recognition code, calibration parameter, load and Mapping table of matching impedance etc.；Peripheral circuit can include liquid crystal display (English：Liquid Crystal Display；Referred to as：LCD) circuit (such as array base palte horizontal drive circuit etc.), USB (English：Universal Serial Bus；Referred to as：USB) power supply circuit of circuit, communication terminal etc.；Sensor unit can include range sensor, pressure Force snesor, temperature sensor etc., are respectively used to detecting distance, pressure and temperature etc..

As shown in figure 1, coupler switch and power coupler connection, and coupler switch has two earth terminals, center Processor, transceiver, power amplifier, wave filter, impedance matching circuit (input of impedance matching circuit and wave filter it is defeated Go out end connection), TX/RX switches, power coupler and variable impedance be sequentially connected, variable impedance (is not marked by antenna opening in Fig. 1 Go out) be connected with antenna, impedance matching circuit, coupler switch, memory, peripheral circuit and sensor unit respectively with centre Reason device connection, central processing unit can be adjusted to the impedance of impedance matching circuit, can also be switched by coupler and controlled Power coupler, and the data stored in memory can be read, the detection of Control peripheral circuit and acquisition sensor unit Sensing data.

It should be noted that antenna load coalignment provided in an embodiment of the present invention mainly includes above-mentioned center treatment Device, transceiver, impedance matching circuit, power coupler and coupler switch, antenna load matching provided in an embodiment of the present invention Method is mainly performed by antenna load coalignment, central processing unit, transceiver, impedance matching circuit, power coupler and coupling The concrete structure of the devices such as clutch switch and effect may be referred to following embodiments, and the concrete structure of remaining device and effect can be with With reference to prior art.

Fig. 2 is refer to, it illustrates a kind of block diagram of antenna load coalignment 20 provided in an embodiment of the present invention, the day Linear load coalignment 20 can be used for communication terminal (not shown in Fig. 2), and communication terminal can include wave filter (in Fig. 2 not Show) and antenna load coalignment 20.Referring to Fig. 2, the antenna load coalignment 20 includes：Processing unit 21, impedance With circuit 22 and load acquiring unit 23, the input (not shown in Fig. 2) of impedance matching circuit 22 and the output end of wave filter (not shown in Fig. 2) connection.

Load acquiring unit 23, the antenna environment for obtaining communication terminal is loaded；

Processing unit 21, for being loaded according to antenna environment, inquires about the corresponding relation of default load and matching impedance, root Determine object matching impedance according to Query Result, the impedance of impedance matching circuit 22 is set to object matching impedance.

In sum, antenna load coalignment provided in an embodiment of the present invention, due to the input of impedance matching circuit It is connected with the output end of wave filter, load acquiring unit can obtain the antenna environment load of communication terminal, and processing unit can Loaded according to antenna environment, inquire about the corresponding relation of default load and matching impedance and object matching is determined according to Query Result Impedance, object matching impedance is set to by the impedance of impedance matching circuit, therefore, processing unit can be loaded according to antenna environment The impedance of impedance matching circuit is adjusted, the impedance of impedance matching circuit is matched with antenna load, it is ensured that the filtering of communication terminal The S11 parameter curves of device convergence in different environments, improves the applicability of communication terminal.

Further, Fig. 3 is refer to, it illustrates the block diagram of load acquiring unit 23 provided in an embodiment of the present invention, ginseng See Fig. 3, load acquiring unit 23 includes：Signal transmitting and receiving module 231 and signal coupling module 232,

Signal transmitting and receiving module 231, for being input into transmission signal to signal coupling module 232；

Signal coupling module 232, for obtaining transmitting coupled signal and reflection coupling signal, and to signal transmitting and receiving module 231 input transmitting coupled signal and reflection coupling signals, transmitting coupled signal is the coupled signal of transmission signal, reflection coupling letter Number for transmission signal reflected signal coupled signal；

Signal transmitting and receiving module 231, is additionally operable to, according to transmitting coupled signal and reflection coupling signal, calculate antenna environment and bear Carry.

Wherein, signal transmitting and receiving module 231 can include the transceiver shown in Fig. 1, and signal coupling module 232 can include figure Power coupler shown in 1 and coupler switch, transceiver can by power amplifier, wave filter, impedance matching circuit, TX/RX is switched and is input into transmission signal to power coupler, so as to signal transmitting and receiving module 231 is input into signal coupling module 232 send out Penetrate signal.Wherein, after transceiver launches transmission signal, power amplifier, wave filter etc. can be to the transmission signal at Manage and finally enter power coupler.The concrete structure of transceiver may be referred to prior art, the structure of signal coupling module 232 Figure can be as shown in Figure 4.

Referring to Fig. 4, signal coupling module 232 includes that power coupler and coupler are switched, and power coupler has port 1st, port 2, port 3 and port 4 totally four ports, coupler switch includes single-pole double-throw switch (SPDT) SW₁With single-pole double-throw switch (SPDT) SW₂, The port 1 of power coupler can be connected with the TX/RX switches shown in Fig. 1, and port 2 can connect with the variable impedance shown in Fig. 1 Connect, port 3 can be with single-pole double-throw switch (SPDT) SW₁Moved end a₁Connection, port 4 can be with single-pole double-throw switch (SPDT) SW₂Moved end a₂Even Connect, single-pole double-throw switch (SPDT) SW₁The first not moved end b₁With single-pole double-throw switch (SPDT) SW₂The first not moved end b₂Can respectively with signal Transceiver module 231 (transceiver shown in Fig. 1) is connected, single-pole double-throw switch (SPDT) SW₁The second not moved end c₁And single-pole double-throw switch (SPDT) SW₂The second not moved end c₂It is grounded respectively, the control end L of coupler switch₂₀₁Can be with processing unit (center as shown in Figure 1 Processor) connection, the control end L switched by coupler by processing unit₂₀₁The state of control coupler switch.Wherein, couple The control end L of device switch₂₀₁Single-pole double-throw switch (SPDT) SW can specifically be included₁Control end (not shown in Fig. 4) and single-pole double throw open Close SW₂Control end (not shown in Fig. 4), processing unit pass through single-pole double-throw switch (SPDT) SW₁Control end and single-pole double-throw switch (SPDT) SW₂Control end control single-pole double-throw switch (SPDT) SW₁With single-pole double-throw switch (SPDT) SW₂, so as to control the state that coupler is switched.

In embodiments of the present invention, coupler switch includes first state and the second state, as single-pole double-throw switch (SPDT) SW₁'s Moved end a₁With single-pole double-throw switch (SPDT) SW₁The second not moved end c₁Connection, and single-pole double-throw switch (SPDT) SW₂Moved end a₂Opened with single-pole double throw Close SW₂The first not moved end b₂During connection, the port 3 of power coupler is grounded, port 4 and the signal transmitting and receiving mould of power coupler Block (transceiver shown in Fig. 1) is connected, and now, the port 3 of power coupler is isolation end, and the port 4 of power coupler is coupling Output end is closed, coupler switch is in first state；As single-pole double-throw switch (SPDT) SW₁Moved end a₁With single-pole double-throw switch (SPDT) SW₁ One not moved end b₁Connection, and single-pole double-throw switch (SPDT) SW₂Moved end a₂With single-pole double-throw switch (SPDT) SW₂The second not moved end c₂During connection, The port 4 of power coupler is grounded, and the port 3 of power coupler is connected with signal transmitting and receiving module (transceiver shown in Fig. 1), this When, the port 4 of power coupler is isolation end, and the port 3 of power coupler is coupled output, and coupler switch is in second State.Wherein it is possible to by processing unit by controlling single-pole double-throw switch (SPDT) SW₁With single-pole double-throw switch (SPDT) SW₂To control coupler Switch switches between the first state and a second state, so that the coupled output of power coupler is in port 3 and port 4 Between switch.

In embodiments of the present invention, Fig. 1 to Fig. 4 is refer to, during communication terminal works, signal transmitting and receiving module The transmission signal S of 231 (transceivers as shown in Figure 1) transmitting_inSequentially pass through power amplifier, wave filter, impedance matching circuit With TX/RX switch input signals coupling module 232, and the input power coupler of port 1 for passing through power coupler, via power To the antenna of communication terminal, antenna is by transmission signal S for port 2 (port 2 the be straight-through output end) output of coupler_inIt is radiated week In confining space.But, in the process, being influenceed by antenna local environment, antenna environment loads the impedance with communication terminal Impedance with circuit is had differences, and the difference is changed with the conversion of antenna local environment, and this species diversity can cause From the transmission signal S that the port 2 of power coupler exports_inIn can not be completely by aerial radiation to surrounding space, there is a part Transmission signal is reflected back power coupler by the port 2 of power coupler, and the signal being reflected back is properly termed as reflection letter Number S_reflect.And communication terminal receive signal during, the antenna of communication terminal can receive useful letter from surrounding space Number and be input to power coupler, the useful signal of input power coupler is properly termed as receiving signal S_receive。

In embodiments of the present invention, load acquiring unit 23 obtain the process of antenna environment load can specifically can be as Under：In the course of work of communication terminal, processing unit 21 (central processing unit in such as Fig. 1) control coupler switch periods Switch between the first state and a second state, when the control coupler switch of processing unit 21 is in first state, power coupling The port 3 of clutch is isolation end, and port 4 is coupled output, and power coupler is to the transmission signal S that is input into from port 1_inCarry out Coupling obtains transmitting coupled signal S_co-in, and from port 4 by transmission signal S_inExport signal transmitting and receiving module 231；When treatment is single When unit 21 controls coupler switch in the second state, the port 4 of power coupler is isolation end, and port 3 is coupled output, Power coupler is to the reflected signal S that is input into from port 3_reflectWith reception signal S_receiveCouple and obtain reflection coupling letter Number S_co-re, and from port 3 by reflection coupling signal S_co-reExport signal transmitting and receiving module 231, the basis of signal transmitting and receiving module 231 The transmitting coupled signal S for receiving_co-inWith reflection coupling signal S_co-reCarry out computing, it is possible to obtain antenna environment load, should Antenna environment load is the antenna load that antenna changes with external environment condition.

It should be noted that signal is coupled power coupler and signal transmitting and receiving module 231 is coupled according to transmitting Signal S_co-inWith reflection coupling signal S_co-reWhat calculating antenna environment was loaded implements process can refer to prior art, The embodiment of the present invention will not be repeated here.Also, it should be noted that in embodiments of the present invention, reflection coupling signal S_co-reIt is actual On be power coupler to reflected signal S_reflectWith reception signal S_receiveCombining signal carry out coupling what is obtained, but due to Reflected signal S_reflectIntensity be far longer than reception signal S_receiveIntensity so that in coupled signal calculating process can neglect Slightly receive signal S_receive, the intensity of coupled signal can only have by reflected signal S_reflectDetermine, therefore, will be to reflected signal S_reflectWith reception signal S_receiveThe coupled signal referred to as reflection coupling signal S that obtains of combining signal_co-re, present invention implementation Example is not construed as limiting to this.

Wherein, processing unit 21 can include the central processing unit shown in Fig. 1, can be stored in the memory shown in Fig. 1 Load and the corresponding relation of matching impedance, processing unit 21 can read load pass corresponding with matching impedance from memory System, after load acquiring unit 23 gets antenna environment load, can process single to the transmission antenna environmental loads of processing unit 21 Unit 21 determines that object matching hinders according to the load of antenna environment load query and the corresponding relation of matching impedance according to Query Result It is anti-；Or, processing unit 21 can store the corresponding relation of load and matching impedance, and load acquiring unit 23 gets antenna loop After the load of border, can be loaded according to antenna environment load query to the transmission antenna environmental loads of processing unit 21, processing unit 21 With the corresponding relation of matching impedance, object matching impedance is determined according to Query Result.Wherein, close corresponding with matching impedance is loaded System is specifically as follows the characterization table of load-matching impedance, and each in this feature table loads corresponding matching impedance can be with Set by theoretical calculation, empirical value, characterize various methods acquisitions such as table calibration system, the embodiment of the present invention is not limited this It is fixed.

Alternatively, processing unit 21, are used for：When in corresponding relation exist and the antenna environment corresponding matching impedance of load When, object matching impedance will be defined as with the corresponding matching impedance of antenna environment load；When in corresponding relation do not exist and antenna During the corresponding matching impedance of environmental loads, default initial matching impedance is defined as object matching impedance.Implement in the present invention In example, initial matching impedance can be set in load and the corresponding relation of matching impedance, the initial matching impedance and fixed antenna Environmental loads (such as 50 ohm) is matched, corresponding with antenna environment load when existing in corresponding relation of the load with matching impedance During matching impedance, processing unit 21 can be inquired and the antenna environment corresponding matching impedance of load, now, the general of processing unit 21 It is defined as object matching impedance with the corresponding matching impedance of antenna environment load, in the corresponding relation with matching impedance is loaded not During in the presence of loading corresponding matching impedance with antenna environment, processing unit 21 cannot be inquired and load corresponding with antenna environment With impedance, now, initial matching impedance can be defined as object matching impedance by processing unit 21.

Alternatively, processing unit 21, are additionally operable to determine the match-type of object matching impedance, according to object matching impedance Match-type, object matching impedance is set to by the impedance of impedance matching circuit.Wherein, match-type is used to indicate object matching The connection in series-parallel type of impedance, for example, match-type can be shunt capacitance-series capacitance type, shunt capacitance-series inductance class Type, shunt inductance-series capacitance type, shunt capacitance-series capacitance type, shunt capacitance-series capacitance-shunt capacitance class Type, shunt capacitance-series inductance-shunt inductance type etc., the embodiment of the present invention is not construed as limiting to this.In the embodiment of the present invention In, load can also store match-type, the query load of processing unit 21 and matching impedance with the corresponding relation of matching impedance Corresponding relation can be obtained by the match-type of object matching impedance.Illustratively, load and the corresponding relation of matching impedance can be with It is as shown in table 1 below：

Table 1

Wherein, Z₀Can be default contexts load (such as 50 ohm), L₁₁And C₂₁Can be initial matching impedance, this is initial Matching impedance is corresponding with default contexts load, and the match-type of the initial matching impedance is shunt inductance-shunt capacitance type. Assuming that the antenna environment load that load acquiring unit 23 gets is Z₃, processing unit 21 is according to antenna environment load Z₃Inquiry table 1 Shown corresponding relation, it is Z that can obtain with antenna environment load₃Corresponding matching impedance is L₁₂+L₁₃And L₂₁, and L₁₂+L₁₃For Parallel impedance, L₂₁It is series impedance, therefore, processing unit 21 is by L₁₂+L₁₃And L₂₁It is defined as object matching impedance, the target Match-type with impedance can be shunt inductance-series inductance type.Again illustratively, it is assumed that load acquiring unit 23 gets Antenna environment load be Z_N+1, then processing unit 21 is according to antenna environment load Z_N+1Corresponding relation shown in inquiry table 1, it is impossible to Inquire and load Z with antenna environment_N+1Corresponding matching impedance, then processing unit 21 is by initial matching impedance L₁₁And C₂₁It is defined as Object matching impedance, the embodiment of the present invention is not construed as limiting to this.

It should be noted that what above-mentioned table 1 was merely exemplary, in practical application, load close corresponding with matching impedance Can be with the SOT state of termination of recording communication terminal, now in system, the corresponding relation of the query load of processing unit 21 and matching impedance, The SOT state of termination of communication terminal can also be obtained.Illustratively, the load can also be such as table 2 below institute with the corresponding relation of matching impedance Show：

Table 2

It should be noted that the embodiment of the present invention is obtained with by signal transmitting and receiving module 231 and signal coupling module 232 Illustrated as a example by antenna environment load, in practical application, can also obtain logical by the sensor unit in communication terminal Believe the SOT state of termination of terminal, then the corresponding relation according to table 2, determine that antenna environment is loaded, sensor unit obtains logical Believe that the process of the SOT state of termination of terminal may be referred to prior art, the embodiment of the present invention will not be repeated here.

Alternatively, Fig. 5 is refer to, the structure it illustrates a kind of impedance matching circuit 22 provided in an embodiment of the present invention is shown It is intended to, referring to Fig. 5, the impedance matching circuit 22 can be L-type impedance matching circuit, and the impedance matching circuit 22 includes：First The series control circuit 222 of adjustment circuit in parallel 221 and first, one end (not marked in Fig. 5) of the first adjustment circuit 221 in parallel and One end (not marked in Fig. 5) of first series control circuit 222 respectively with the input SL of impedance matching circuit 22₁Connection, the The other end (not marked in Fig. 5) of connection adjustment circuit 221 is grounded in the lump, and the other end of the first series control circuit 222 is (in Fig. 5 Do not mark) with the output end SL of impedance matching circuit 22₂Connection.Wherein, the input SL of impedance matching circuit 22₁Can be with filter Output end (not shown in Fig. 5) connection of ripple device (not shown in Fig. 5).

Further, as shown in figure 5, the first adjustment circuit 221 in parallel includes：First single-pole double-throw switch (SPDT) SW₂₁, first electricity Hold array C₁(do not marked in Fig. 5) with the first electric inductance array, the first capacitor array C₁Capacitance and the first electric inductance array inductance Value can be adjusted.First capacitor array C₁Concrete structure may be referred to prior art, as shown in figure 5, the first electric inductance array Including：First SP3T switch SW₃₁, the second SP3T switch SW₃₂And three the first inductance being sequentially connected in series, should be according to Three the first inductance of secondary series connection can include the first inductance L₁₁, the first inductance L₁₂With the first inductance L₁₃, the first inductance L₁₁, One inductance L₁₂With the first inductance L₁₃Head and the tail are sequentially connected.First single-pole double-throw switch (SPDT) SW₂₁Moved end a₂₁With impedance matching circuit 22 Input SL₁Connection, the first not moved end b₂₁With the first SP3T switch SW₃₁Moved end a₃₁Connection, the second not moved end c₂₁With First capacitor array C₁First end (not marked in Fig. 5) connection；First SP3T switch SW₃₁Three not moved end respectively with Three first ends of the first inductance (not marked in Fig. 5) connect one to one, specifically, the first SP3T switch SW₃₁ One not moved end b₃₁With the first inductance L₁₁First end connection, the first SP3T switch SW₃₁The second not moved end c₃₁With the first electricity Sense L₁₂First end connection, the first SP3T switch SW₃₁The 3rd not moved end d₃₁With the first inductance L₁₃First end connection； Second SP3T switch SW₃₂Three not moved end respectively with a pair of three second ends (not marked in Fig. 5) of the first inductance Should connect, specifically, the second SP3T switch SW₃₂The first not moved end b₃₂With the first inductance L₁₁The second end connection, second SP3T switch SW₃₂The second not moved end c₃₂With the first inductance L₁₂The second end connection, the second SP3T switch SW₃₂'s 3rd not moved end d₃₂With the first inductance L₁₃The second end connection.As shown in figure 5, the second SP3T switch SW₃₂Moved end a₃₂With First capacitor array C₁The second end (not marked in Fig. 5) be grounded respectively.

Further, as shown in figure 5, the second series control circuit 222 includes：Second single-pole double-throw switch (SPDT) SW₂₂, second electricity Hold array C₂(do not marked in Fig. 5) with the second electric inductance array, the second capacitor array C₂Capacitance and the second electric inductance array inductance Value can be adjusted.Second capacitor array C₂Concrete structure may be referred to prior art, as shown in figure 5, the second electric inductance array Including：3rd SP3T switch SW₃₃, the 4th SP3T switch SW₃₄And three the second inductance being sequentially connected in series, should be according to Three the second inductance of secondary series connection can include the second inductance L₂₁, the second inductance L₂₂With the second inductance L₂₃, the second inductance L₂₁, Two inductance L₂₂With the second inductance L₂₃Head and the tail are sequentially connected.Second single-pole double-throw switch (SPDT) SW₂₂Moved end a₂₂With impedance matching circuit 22 Input SL₁Connection, the first not moved end b₂₂With the 3rd SP3T switch SW₃₃Moved end a₃₃Connection, the second not moved end c₂₂With Second capacitor array C₂First end (not marked in Fig. 5) connection；3rd SP3T switch SW₃₃Three not moved end respectively with Three first ends of the second inductance (not marked in Fig. 5) connect one to one, specifically, the 3rd SP3T switch SW₃₃ One not moved end b₃₃With the second inductance L₂₁First end connection, the 3rd SP3T switch SW₃₃The second not moved end c₃₃With the second electricity Sense L₂₂First end connection, the 3rd SP3T switch SW₃₃The 3rd not moved end d₃₃With the second inductance L₂₃First end connection； 4th SP3T switch SW₃₄Three not moved end respectively with a pair of three second ends (not marked in Fig. 5) of the second inductance Should connect, specifically, the 4th SP3T switch SW₃₄The first not moved end b₃₄With the second inductance L₂₁The second end connection, the 4th SP3T switch SW₃₄The second not moved end c₃₄With the second inductance L₂₂The second end connection, the 4th SP3T switch SW₃₄'s 3rd not moved end d₃₄With the second inductance L₂₃The second end connection；As shown in figure 5, the 4th SP3T switch SW₃₄Moved end a₃₄With Second capacitor array C₂The second end (not marked in Fig. 5) respectively with the output end SL of impedance matching circuit 22₂Connection.

Wherein, in the impedance matching circuit 22 shown in Fig. 5, the control end of all of single-pole double-throw switch (SPDT), all of electricity The control end of the control end and all of SP3T switch of holding array is connected with processing unit (not shown in Fig. 5) respectively.Tool Body ground, as shown in figure 5, the first single-pole double-throw switch (SPDT) SW₂₁Control end CL₂₁, the second single-pole double-throw switch (SPDT) SW₂₂Control end CL₂₂, the first capacitor array C₁Control end (not shown in Fig. 5) and the second capacitor array C₂Control end (not shown in Fig. 5) It is connected with processing unit respectively, the first SP3T switch SW₃₁Control end CL₃₁₁And CL₃₁₂It is connected with processing unit respectively, the Two SP3T switch SW₃₂Control end CL₃₂₁And CL₃₂₂It is connected with processing unit respectively, the 3rd SP3T switch SW₃₃'s Control end CL₃₃₁And CL₃₃₂It is connected with processing unit respectively, the 4th SP3T switch SW₃₄Control end CL₃₄₁And CL₃₄₂Respectively It is connected with processing unit.

Alternatively, Fig. 6 is refer to, it illustrates the structure of another impedance matching circuit 22 provided in an embodiment of the present invention Schematic diagram, referring to Fig. 6, the impedance matching circuit 22 can be π type impedance matching circuits, and the impedance matching circuit 22 includes：The Two adjustment circuits 223 in parallel, the second series control circuit 224 and the 3rd adjustment circuit 225 in parallel, the second adjustment circuit in parallel 223 one end (not marked in Fig. 6) and one end (not marked in Fig. 6) of the second series control circuit 224 respectively with impedance matching The input SL of circuit 22₁Connection, one end (not marked in Fig. 6) of the 3rd adjustment circuit 225 in parallel and the second series connection adjustment electricity Road 224 the other end (not marked in Fig. 6) connection respectively with the output end SL of impedance matching circuit 22₂Connection, the second simultaneously joint debugging The other end (not marked in Fig. 6) of the other end (not marked in Fig. 6) of whole circuit 223 and the 3rd adjustment circuit 225 in parallel is respectively Ground connection.Wherein, the input SL of impedance matching circuit 22₁Can be with the output end of wave filter (not shown in Fig. 6) (in Fig. 6 not Show) connection.

Further, as shown in fig. 6, the second adjustment circuit 223 in parallel includes：First single-pole double-throw switch (SPDT) SW₂₁, first electricity Hold array C₁(do not marked in Fig. 6) with the first electric inductance array, the first capacitor array C₁Capacitance and the first electric inductance array inductance Value can be adjusted.First capacitor array C₁Concrete structure may be referred to prior art, as shown in fig. 6, the first electric inductance array Including：First SP3T switch SW₃₁, the second SP3T switch SW₃₂And three the first inductance being sequentially connected in series, should be according to Three the first inductance of secondary series connection can include the first inductance L₁₁, the first inductance L₁₂With the first inductance L₁₃, the first inductance L₁₁, One inductance L₁₂With the first inductance L₁₃Head and the tail are sequentially connected.First single-pole double-throw switch (SPDT) SW₂₁Moved end a₂₁With impedance matching circuit 22 Input SL₁Connection, the first not moved end b₂₁With the first SP3T switch SW₃₁Moved end a₃₁Connection, the second not moved end c₂₁With First capacitor array C₁First end (not marked in Fig. 6) connection；First SP3T switch SW₃₁Three not moved end respectively with Three first ends of the first inductance (not marked in Fig. 6) connect one to one, specifically, the first SP3T switch SW₃₁ One not moved end b₃₁With the first inductance L₁₁First end connection, the first SP3T switch SW₃₁The second not moved end c₃₁With the first electricity Sense L₁₂First end connection, the first SP3T switch SW₃₁The 3rd not moved end d₃₁With the first inductance L₁₃First end connection； Second SP3T switch SW₃₂Three not moved end respectively with a pair of three second ends (not marked in Fig. 6) of the first inductance Should connect, specifically, the second SP3T switch SW₃₂The first not moved end b₃₂With the first inductance L₁₁The second end connection, second SP3T switch SW₃₂The second not moved end c₃₂With the first inductance L₁₂The second end connection, the second SP3T switch SW₃₂'s 3rd not moved end d₃₂With the first inductance L₁₃The second end connection；As shown in fig. 6, the second SP3T switch SW₃₂Moved end a₃₂With First capacitor array C₁The second end (not marked in Fig. 6) be grounded respectively.

Further, as shown in fig. 6, the second series control circuit 224 includes：Second single-pole double-throw switch (SPDT) SW₂₂, second electricity Hold array C₂(do not marked in Fig. 6) with the second electric inductance array, the second capacitor array C₂Capacitance and the second electric inductance array inductance Value can be adjusted.Second capacitor array C₂Concrete structure may be referred to prior art, as shown in fig. 6, the second electric inductance array Including：3rd SP3T switch SW₃₃, the 4th SP3T switch SW₃₄And three the second inductance being sequentially connected in series, should be according to Three the second inductance of secondary series connection can include the second inductance L₂₁, the second inductance L₂₂With the second inductance L₂₃, the second inductance L₂₁, Two inductance L₂₂With the second inductance L₂₃Head and the tail are sequentially connected.Second single-pole double-throw switch (SPDT) SW₂₂Moved end a₂₂With impedance matching circuit 22 Input SL₁Connection, the first not moved end b₂₂With the 3rd SP3T switch SW₃₃Moved end a₃₃Connection, the second not moved end c₂₂With Second capacitor array C₂First end (not marked in Fig. 6) connection；3rd SP3T switch SW₃₃Three not moved end respectively with Three first ends of the second inductance (not marked in Fig. 6) connect one to one, specifically, the 3rd SP3T switch SW₃₃ One not moved end b₃₃With the second inductance L₂₁First end connection, the 3rd SP3T switch SW₃₃The second not moved end c₃₃With the second electricity Sense L₂₂First end connection, the 3rd SP3T switch SW₃₃The 3rd not moved end d₃₃With the second inductance L₂₃First end connection； 4th SP3T switch SW₃₄Three not moved end respectively with a pair of three second ends (not marked in Fig. 6) of the second inductance Should connect, specifically, the 4th SP3T switch SW₃₄The first not moved end b₃₄With the second inductance L₂₁The second end connection, the 4th SP3T switch SW₃₄The second not moved end c₃₄With the second inductance L₂₂The second end connection, the 4th SP3T switch SW₃₄'s 3rd not moved end d₃₄With the second inductance L₂₃The second end connection；As shown in fig. 6, the 4th SP3T switch SW₃₄Moved end a₃₄With Second capacitor array C₂The second end (not marked in Fig. 6) respectively with the output end SL of impedance matching circuit 22₂Connection.

Further, as shown in fig. 6, the 3rd adjustment circuit 225 in parallel includes：3rd single-pole double-throw switch (SPDT) SW₂₃, the 3rd electricity Hold array C₃With the 3rd electric inductance array (not marked in Fig. 6), the 3rd capacitor array C₃Capacitance and the 3rd electric inductance array inductance Value can be adjusted.3rd capacitor array C₃Concrete structure may be referred to prior art, as shown in fig. 6, the 3rd electric inductance array Including：5th SP3T switch SW₃₃, the 6th SP3T switch SW₃₆And three the 3rd inductance being sequentially connected in series, should be according to Three the 3rd inductance of secondary series connection can include the 3rd inductance L₃₁, the 3rd inductance L₃₂With the 3rd inductance L₃₃, the 3rd inductance L₃₁, Three inductance L₃₂With the 3rd inductance L₃₃Head and the tail are sequentially connected.3rd single-pole double-throw switch (SPDT) SW₂₃Moved end a₂₃With impedance matching circuit 22 Output end SL₂Connection, the first not moved end b₂₂With the 5th SP3T switch SW₃₅Moved end a₃₅Connection, the second not moved end c₂₃With 3rd capacitor array C₃First end (not marked in Fig. 6) connection；5th SP3T switch SW₃₅Three not moved end respectively with The first end (not marked in Fig. 6) of three the 3rd inductance connects one to one, specifically, the 5th SP3T switch SW₃₅ One not moved end b₃₅With the 3rd inductance L₃₁First end connection, the 5th SP3T switch SW₃₅The second not moved end c₃₅With the 3rd electricity Sense L₃₂First end connection, the 5th SP3T switch SW₃₅The 3rd not moved end d₃₅With the 3rd inductance L₃₃First end connection； 6th SP3T switch SW₃₆Three not moved end respectively with a pair of three second ends (not marked in Fig. 6) of the 3rd inductance Should connect, specifically, the 6th SP3T switch SW₃₆The first not moved end b₃₆With the 3rd inductance L₃₁The second end connection, the 6th SP3T switch SW₃₆The second not moved end c₃₆With the 3rd inductance L₃₂The second end connection, the 6th SP3T switch SW₃₆'s 3rd not moved end d₃₆With the 3rd inductance L₃₃The second end connection；As shown in fig. 6, the 6th SP3T switch SW₃₆Moved end a₃₆With 3rd capacitor array C₃The second end (not marked in Fig. 6) be grounded respectively.

Wherein, in the impedance matching circuit 22 shown in Fig. 6, the control end of all of single-pole double-throw switch (SPDT), all of electricity The control end of the control end and all of SP3T switch of holding array is connected with processing unit (not shown in Fig. 5) respectively.Tool Body ground, as shown in fig. 6, the first single-pole double-throw switch (SPDT) SW₂₁Control end CL₂₁, the second single-pole double-throw switch (SPDT) SW₂₂Control end CL₂₂, the 3rd single-pole double-throw switch (SPDT) SW₂₃Control end CL₂₃, the first capacitor array C₁Control end (not shown in Fig. 6), second Capacitor array C₂Control end (not shown in Fig. 6) and the 3rd capacitor array C₃Control end (not shown in Fig. 6) respectively with treatment Unit is connected, the first SP3T switch SW₃₁Control end CL₃₁₁And CL₃₁₂It is connected with processing unit respectively, the second SP3T Switch SW₃₂Control end CL₃₂₁And CL₃₂₂It is connected with processing unit respectively, the 3rd SP3T switch SW₃₃Control end CL₃₃₁ And CL₃₃₂It is connected with processing unit respectively, the 4th SP3T switch SW₃₄Control end CL₃₄₁And CL₃₄₂Respectively with processing unit Connection, the 5th SP3T switch SW₃₅Control end CL₃₅₁And CL₃₅₂It is connected with processing unit respectively, the 6th SP3T switch SW₃₆Control end CL₃₆₁And CL₂₆₂It is connected with processing unit respectively.

Alternatively, Fig. 7 is refer to, it illustrates the structure of another impedance matching circuit 22 provided in an embodiment of the present invention Schematic diagram, referring to Fig. 7, the impedance matching circuit 22 can be T-shaped impedance matching circuit, and the impedance matching circuit 22 includes：The The series control circuit 228 of adjustment circuit 227 and the 4th in parallel of three series control circuit the 226, the 4th, the 3rd series control circuit 226 one end (not marked in Fig. 7) and the input SL of impedance matching circuit 22₁Connection, the 3rd series control circuit 226 it is another Adjustment in parallel with the 4th is electric respectively for one end (not marked in Fig. 7) of one end (not marked in Fig. 7) and the 4th series control circuit 228 One end (not marked in Fig. 7) connection on road 227, the other end (not marked in Fig. 7) ground connection of the 4th adjustment circuit 227 in parallel, the The other end (not marked in Fig. 7) of four series control circuits 228 and the output end SL of impedance matching circuit 22₂Connection.Wherein, hinder The input SL of anti-match circuit 22₁Can be connected with the output end (not shown in Fig. 7) of wave filter (not shown in Fig. 7).

Further, as shown in fig. 7, the 3rd series control circuit 226 includes：First single-pole double-throw switch (SPDT) SW₂₁, first electricity Hold array C₁(do not marked in Fig. 7) with the first electric inductance array, the first capacitor array C₁Capacitance and the first electric inductance array inductance Value can be adjusted.First capacitor array C₁Concrete structure may be referred to prior art, as shown in fig. 7, the first electric inductance array Including：First SP3T switch SW₃₁, the second SP3T switch SW₃₂And three the first inductance being sequentially connected in series, should be according to Three the first inductance of secondary series connection can include the first inductance L₁₁, the first inductance L₁₂With the first inductance L₁₃, the first inductance L₁₁, One inductance L₁₂With the first inductance L₁₃Head and the tail are sequentially connected.First single-pole double-throw switch (SPDT) SW₂₁Moved end a₂₁With impedance matching circuit 22 Input SL₁Connection, the first not moved end b₂₁With the first SP3T switch SW₃₁Moved end a₃₁Connection, the second not moved end c₂₁With First capacitor array C₁First end (not marked in Fig. 7) connection；First SP3T switch SW₃₁Three not moved end respectively with Three first ends of the first inductance (not marked in Fig. 7) connect one to one, specifically, the first SP3T switch SW₃₁ One not moved end b₃₁With the first inductance L₁₁First end connection, the first SP3T switch SW₃₁The second not moved end c₃₁With the first electricity Sense L₁₂First end connection, the first SP3T switch SW₃₁The 3rd not moved end d₃₁With the first inductance L₁₃First end connection； Second SP3T switch SW₃₂Three not moved end respectively with a pair of three second ends (not marked in Fig. 7) of the first inductance Should connect, specifically, the second SP3T switch SW₃₂The first not moved end b₃₂With the first inductance L₁₁The second end connection, second SP3T switch SW₃₂The second not moved end c₃₂With the first inductance L₁₂The second end connection, the second SP3T switch SW₃₂'s 3rd not moved end d₃₂With the first inductance L₁₃The second end connection；As shown in fig. 7, the moved end a of the second SP3T switch₃₂With One capacitor array C₁The second end (not marked in Fig. 7) be connected with first node A respectively.

Further, as shown in fig. 7, the 4th adjustment circuit 227 in parallel includes：Second single-pole double-throw switch (SPDT) SW₂₂, second electricity Hold array C₂(do not marked in Fig. 7) with the second electric inductance array, the second capacitor array C₂Capacitance and the second electric inductance array inductance Value can be adjusted.Second capacitor array C₂Concrete structure may be referred to prior art, as shown in fig. 7, the second electric inductance array Including：3rd SP3T switch SW₃₃, the 4th SP3T switch SW₃₄And three the second inductance being sequentially connected in series, should be according to Three the second inductance of secondary series connection can include the second inductance L₂₁, the second inductance L₂₂With the second inductance L₂₃, the second inductance L₂₁, Two inductance L₂₂With the second inductance L₂₃Head and the tail are sequentially connected.Second single-pole double-throw switch (SPDT) SW₂₂Moved end a₂₂It is connected with first node A, First not moved end b₂₂With the 3rd SP3T switch SW₃₃Moved end a₃₃Connection, the second not moved end c₂₂With the second capacitor array C₂'s First end (not marked in Fig. 7) is connected；3rd SP3T switch SW₃₃Three not moved end respectively with three the of the second inductance One end (not marked in Fig. 7) connects one to one, specifically, the 3rd SP3T switch SW₃₃The first not moved end b₃₃With second Inductance L₂₁First end connection, the 3rd SP3T switch SW₃₃The second not moved end c₃₃With the second inductance L₂₂First end connect Connect, the 3rd SP3T switch SW₃₃The 3rd not moved end d₃₃With the second inductance L₂₃First end connection；4th SP3T is opened Close SW₃₄Three not second end (in Fig. 7 do not mark) of the moved end respectively with three the second inductance connect one to one, specifically, 4th SP3T switch SW₃₄The first not moved end b₃₄With the second inductance L₂₁The second end connection, the 4th SP3T switch SW₃₄The second not moved end c₃₄With the second inductance L₂₂The second end connection, the 4th SP3T switch SW₃₄The 3rd not moved end d₃₄ With the second inductance L₂₃The second end connection；As shown in fig. 7, the 4th SP3T switch SW₃₄Moved end a₃₄With the second capacitor array C₂The second end (not marked in Fig. 7) be grounded respectively.

Further, as shown in fig. 7, the 4th series control circuit 228 includes：3rd single-pole double-throw switch (SPDT) SW₂₃, the 3rd electricity Hold array C₃With the 3rd electric inductance array (not marked in Fig. 7), the 3rd capacitor array C₃Capacitance and the 3rd electric inductance array inductance Value can be adjusted.3rd capacitor array C₃Concrete structure may be referred to prior art, as shown in fig. 7, the 3rd electric inductance array Including：5th SP3T switch SW₃₅, the 6th SP3T switch SW₃₆And three the 3rd inductance being sequentially connected in series, should be according to Three the 3rd inductance of secondary series connection can include the 3rd inductance L₃₁, the 3rd inductance L₃₂With the 3rd inductance L₃₃, the 3rd inductance L₃₁, Three inductance L₃₂With the 3rd inductance L₃₃Head and the tail are sequentially connected.3rd single-pole double-throw switch (SPDT) SW₂₃Moved end a₂₃It is connected with first node A, First not moved end b₂₃With the 5th SP3T switch SW₃₅Moved end a₃₅Connection, the second not moved end c₂₃With the 3rd capacitor array C₃'s First end (not marked in Fig. 7) is connected；5th SP3T switch SW₃₅Three not moved end respectively with three the of the 3rd inductance One end (not marked in Fig. 7) connects one to one, specifically, the 5th SP3T switch SW₃₅The first not moved end b₃₅With the 3rd Inductance L₃₁First end connection, the 5th SP3T switch SW₃₅The second not moved end c₃₅With the 3rd inductance L₃₂First end connect Connect, the 5th SP3T switch SW₃₅The 3rd not moved end d₃₅With the 3rd inductance L₃₃First end connection；6th SP3T is opened Close SW₃₆Three not second end (in Fig. 7 do not mark) of the moved end respectively with three the 3rd inductance connect one to one, specifically, 6th SP3T switch SW₃₆The first not moved end b₃₆With the 3rd inductance L₃₁The second end connection, the 6th SP3T switch SW₃₆The second not moved end c₃₆With the 3rd inductance L₃₂The second end connection, the 6th SP3T switch SW₃₆The 3rd not moved end d₃₆ With the 3rd inductance L₃₃The second end connection；As shown in fig. 7, the 6th SP3T switch SW₃₆Moved end a₃₆With the 3rd capacitor array C₃The second end (not marked in Fig. 7) respectively with the output end SL of impedance matching circuit 22₂Connection.

Wherein, in the impedance matching circuit 22 shown in Fig. 7, the control end of all of single-pole double-throw switch (SPDT), all of electricity The control end of the control end and all of SP3T switch of holding array is connected with processing unit (not shown in Fig. 7) respectively.Tool Body ground, as shown in fig. 7, the first single-pole double-throw switch (SPDT) SW₂₁Control end CL₂₁, the second single-pole double-throw switch (SPDT) SW₂₂Control end CL₂₂, the 3rd single-pole double-throw switch (SPDT) SW₂₃Control end CL₂₃, the first capacitor array C₁Control end (not shown in Fig. 7), second Capacitor array C₂Control end (not shown in Fig. 7) and the 3rd capacitor array C₃Control end (not shown in Fig. 7) respectively with treatment Unit is connected, the first SP3T switch SW₃₁Control end CL₃₁₁And CL₃₁₂It is connected with processing unit respectively, the second SP3T Switch SW₃₂Control end CL₃₂₁And CL₃₂₂It is connected with processing unit respectively, the 3rd SP3T switch SW₃₃Control end CL₃₃₁ And CL₃₃₂It is connected with processing unit respectively, the 4th SP3T switch SW₃₄Control end CL₃₄₁And CL₃₄₂Respectively with processing unit Connection, the 5th SP3T switch SW₃₅Control end CL₃₅₁And CL₃₅₂It is connected with processing unit respectively, the 6th SP3T switch SW₃₆Control end CL₃₆₁And CL₃₆₂It is connected with processing unit respectively.

It should be noted that it will be appreciated by those skilled in the art that, the impedance matching circuit shown in above-mentioned Fig. 5 to Fig. 7 is Arranged side by side, in practical application, communication terminal includes any shown impedance matching circuits of above-mentioned Fig. 5 to Fig. 7, and the present invention is real Example is applied in order to be made a distinction to adjustment circuit, switch, inductance etc., the description of first, second, third, etc. is employed, this first, 2nd, the third just for the sake of distinguishing, and does not indicate that sequencing.Also, it should be noted that right shown in above-mentioned Tables 1 and 2 The impedance for going for adjusting the impedance matching circuit 22 shown in Fig. 5 should be related to, when impedance matching circuit is the resistance shown in Fig. 6 During anti-match circuit 22, the parallel connection shown in above-mentioned Tables 1 and 2 can be able to be the second series connection for the second parallel connection, series connection, and should The inductance and electric capacity of corresponding 3rd parallel connection can be increased in Tables 1 and 2；When impedance matching circuit is the impedance shown in Fig. 7 During match circuit 22, the parallel connection shown in above-mentioned Tables 1 and 2 can be the 3rd series connection for the 4th parallel connection, series connection, and this can To increase the inductance and electric capacity of corresponding 4th series connection in Tables 1 and 2, the embodiment of the present invention will not be repeated here.The present invention Embodiment is illustrated by taking the impedance matching circuit 22 shown in Fig. 5 as an example come the principle to impedance matching circuit.It is specific as follows：

In communication terminal, as shown in figure 5, the input SL of impedance matching circuit 22₁Can be with the wave filter shown in Fig. 1 Output end connection, the output end SL of impedance matching circuit 22₂Can be connected with the TX/RX switches shown in Fig. 1.Impedance matching electricity The course of work of the capacitor array on road 22 may be referred to prior art, here with the first SP3T switch SW₃₁, the second hilted broadsword three Throw switch SW₃₂And the first inductance L being sequentially connected in series₁₁, the first inductance L₁₂With the first inductance L₁₃Composition the first electric inductance array be Example is illustrated come the course of work of the electric inductance array to impedance matching circuit 22：As the first SP3T switch SW₃₁Moved end a₃₁With the first SP3T switch SW₃₁The first not moved end b₃₁Connection, and the second SP3T switch SW₃₂Moved end a₃₂With Two SP3T switch SW₃₂The first not moved end b₃₂During connection, the inductance value of the first electric inductance array is L₁₁；When the first hilted broadsword three Throw switch SW₃₁Moved end a₃₁With the first SP3T switch SW₃₁The first not moved end b₃₁Connection, and the second SP3T switch SW₃₂Moved end a₃₂With the second SP3T switch SW₃₂The second not moved end c₃₂During connection, the inductance value of the first electric inductance array is L₁₁+L₁₂；As the first SP3T switch SW₃₁Moved end a₃₁With the first SP3T switch SW₃₁The first not moved end b₃₁Connection, And the second SP3T switch SW₃₂Moved end a₃₂With the second SP3T switch SW₃₂The 3rd not moved end d₃₂During connection, first The inductance value of electric inductance array is L₁₁+L₁₂+L₁₃；As the first SP3T switch SW₃₁Moved end a₃₁With the first SP3T switch SW₃₁The second not moved end c₃₁Connection, and the second SP3T switch SW₃₂Moved end a₃₂With the second SP3T switch SW₃₂'s Second not moved end c₃₂During connection, the inductance value of the first electric inductance array is L₁₂；As the first SP3T switch SW₃₁Moved end a₃₁With First SP3T switch SW₃₁The second not moved end c₃₁Connection, and the second SP3T switch SW₃₂Moved end a₃₂It is single with second The throw switch SW of knife three₃₂The 3rd not moved end d₃₂During connection, the inductance value of the first electric inductance array is L₁₂+L₁₃；When the first SP3T Switch SW₃₁Moved end a₃₁With the first SP3T switch SW₃₁The 3rd not moved end d₃₁Connection and the second SP3T switch SW₃₂ Moved end a₃₂With the second SP3T switch SW₃₂The 3rd not moved end d₃₂During connection, the inductance value of the first electric inductance array is L₁₃； As the first SP3T switch SW₃₁Moved end a₃₁With the first SP3T switch SW₃₁The second not moved end c₃₁Connection, and second SP3T switch SW₃₂Moved end a₃₂With the second SP3T switch SW₃₂The first not moved end b₃₂During connection, or, when first SP3T switch SW₃₁Moved end a₃₁With the first SP3T switch SW₃₁The 3rd not moved end d₃₁Connection, and the second hilted broadsword three Throw switch SW₃₂Moved end a₃₂With the second SP3T switch SW₃₂The second not moved end c₃₂During connection, the electricity of the first electric inductance array Inductance value is 0, according to circuit structure and the conductive situation of electric inductance array, when electric inductance array is located in adjustment circuit in parallel, electricity Inductance value is that 0 inductance state is forbidden, such as, due to Fig. 5 in the first electric inductance array be located at the first adjustment circuit 221 in parallel In, therefore, inductance value is that 0 inductance state is forbidden for the first electric inductance array in Fig. 5.According to in Fig. 5 The description of the first electric inductance array understands that in embodiments of the present invention, the first electric inductance array in Fig. 5 can realize six kinds of inductance values State, that is to say, the first electric inductance array in Fig. 5 can realize six kinds of adjustment of inductance value, and six kinds of inductance values are respectively： L₁₁、L₁₂、L₁₃、L₁₁+L₁₂、L₁₂+L₁₃And L₁₁+L₁₂+L₁₃, similarly, the second electric inductance array in Fig. 5 (is located at series control circuit In) seven kinds of adjustment of inductance value can be realized, seven kinds of inductance values are respectively：L₂₁、L₂₂、L₂₃、L₂₁+L₂₂、L₂₂+L₂₃、L₂₁+L₂₂+ L₂₃With 0.

In embodiments of the present invention, as shown in figure 5, can be by the first single-pole double-throw switch (SPDT) of impedance matching circuit 22 SW₂₁With the first single-pole double-throw switch (SPDT) SW₂₂To adjust the match-type of impedance matching circuit 22.Specifically, when the first single-pole double throw Switch SW₂₁Moved end a₂₁With the first single-pole double-throw switch (SPDT) SW₂₁The first not moved end b₂₁Connection, and the second single-pole double-throw switch (SPDT) SW₂₂Moved end a₂₂With the second single-pole double-throw switch (SPDT) SW₂₂The first not moved end b₂₂During connection, the matching class of impedance matching circuit 22 Type is shunt inductance-series inductance type, and the equivalent circuit diagram of impedance matching circuit 22 is as shown in Figure 8.When the first single-pole double throw Switch SW₂₁Moved end a₂₁With the first single-pole double-throw switch (SPDT) SW₂₁The first not moved end b₂₁Connection, and the second single-pole double-throw switch (SPDT) SW₂₂Moved end a₂₂With the second single-pole double-throw switch (SPDT) SW₂₂The second not moved end c₂₂During connection, the matching class of impedance matching circuit 22 Type is shunt inductance-series capacitance type, and the equivalent circuit diagram of impedance matching circuit 22 is as shown in Figure 9.When the first single-pole double throw Switch SW₂₁Moved end a₂₁With the first single-pole double-throw switch (SPDT) SW₂₁The second not moved end c₂₁Connection, and the second single-pole double-throw switch (SPDT) SW₂₂Moved end a₂₂With the second single-pole double-throw switch (SPDT) SW₂₂The first not moved end b₂₂During connection, the matching class of impedance matching circuit 22 Type is shunt capacitance-series inductance type, and the equivalent circuit diagram of impedance matching circuit 22 is as shown in Figure 10.When the first single-pole double throw Switch SW₂₁Moved end a₂₁With the first single-pole double-throw switch (SPDT) SW₂₁The second not moved end c₂₁Connection, and the second single-pole double-throw switch (SPDT) SW₂₂Moved end a₂₂With the second single-pole double-throw switch (SPDT) SW₂₂The second not moved end c₂₂During connection, the matching class of impedance matching circuit 22 Type is shunt capacitance-series capacitance type, and the equivalent circuit diagram of impedance matching circuit 22 is as shown in figure 11.

In embodiments of the present invention, processing unit 21 determines the match-type of object matching impedance and object matching impedance Afterwards, the impedance of impedance matching circuit 22 can be set to by object matching impedance according to the match-type of object matching impedance.Show Example ground, the impedance matching circuit 22 shown in impedance matching circuit as Fig. 5, and with object matching impedance as L₁₂+L₁₃And L₂₁, mesh The match-type of matching impedance is marked for, to illustrating, processing unit 21 can basis as a example by sensing-series inductance type in parallel Sensing-series inductance type in parallel, by the first single-pole double-throw switch (SPDT) SW₂₁Control end CL₂₁Control the first single-pole double-throw switch (SPDT) SW₂₁Moved end a₂₁With the first single-pole double-throw switch (SPDT) SW₂₁The first not moved end b₂₁Connection, by the first SP3T switch SW₃₁ Control end CL₃₁₁And CL₃₁₂Control the first SP3T switch SW₃₁Moved end a₃₁With the first SP3T switch SW₃₁Second Not moved end c₃₁Connection, by the second SP3T switch SW₃₂Control end CL₃₂₁And CL₃₂₂Control the second SP3T switch SW₃₂Moved end a₃₂With the second SP3T switch SW₃₂The 3rd not moved end d₃₂Connection, now, shunt inductance is L₁₂+L₁₃；Together When, processing unit 21 can be by the second single-pole double-throw switch (SPDT) SW₂₂Control end CL₂₂Control the second single-pole double-throw switch (SPDT) SW₂₂'s Moved end a₂₂With the second single-pole double-throw switch (SPDT) SW₂₂The first not moved end b₂₁Connection, by the 3rd SP3T switch SW₃₃Control End CL₃₃₁And CL₃₃₂Control the 3rd SP3T switch SW₃₃Moved end a₃₃With the 3rd SP3T switch SW₃₃The first not moved end b₃₃Connection, by the 4th SP3T switch SW₃₄Control end CL₃₄₁And CL₃₄₂Control the 4th SP3T switch SW₃₄It is dynamic End a₃₄With the 4th SP3T switch SW₃₄The first not moved end b₃₄Connection, now, series inductance is L₂₁.So far, processing unit The impedance adjustment of impedance matching circuit 22 is object matching impedance by 21.

It should be noted that the embodiment of the present invention is illustrated by taking the L-type impedance matching circuit shown in Fig. 5 as an example, The principle of the π type impedance matching circuits shown in Fig. 6 and adjustment process, the principle of the T-shaped impedance matching circuit shown in Fig. 7 and Adjustment process can refer to the associated description of Fig. 5, and the embodiment of the present invention will not be repeated here.

In embodiments of the present invention, communication terminal acquiescence is in free space state, and communication terminal is in free space During state, the antenna environment load of communication terminal is dead load, and the dead load is usually 50 ohm, now, matching impedance The impedance of circuit is initial matching impedance, and by taking the matching impedance circuit 22 shown in Fig. 5 as an example, initial matching impedance is specifically as follows Shunt inductance L₁₁, series capacitance C₂₁.During communication terminal works, load acquiring unit 23 can in real time obtain antenna Environmental loads, and to the transmission antenna environmental loads of processing unit 21, then, processing unit 21 sends according to load acquiring unit 23 Antenna environment load, (load can be negative with the corresponding relation of matching impedance to the corresponding relation of query load and matching impedance Load-matching impedance characterize table), determine matching impedance circuit 22 this antenna environment load under, optimal object matching impedance, And the impedance of matching impedance circuit 22 is set to the object matching impedance, it is ensured that the S11 parameters of the wave filter of communication terminal are bent Line has good convergence under the load of this antenna environment, solves due to wave filter caused by antenna environment load change The problem that the convergence of S11 parameter curves is deteriorated.By this measure the S11 parameter curves of wave filter can be ensured in various antennas Good convergence can be kept under environmental loads, and then is ensured in the case where various antenna environments are loaded, communication terminal can keep Good reception index and launching target.

The embodiment of the present invention is entered to the constringent effect of the S11 parameter curves of wave filter with reference to Figure 12 to Figure 14 Row explanation.Specifically, when communication terminal is in free space state, the antenna environment load of communication terminal can be 50 ohm, The impedance of impedance matching circuit is initial matching impedance, impedance matching circuit acquiescence matching, and the impedance of impedance matching circuit can be with It is shunt inductance L₁₁, series capacitance C₂₁, now, the S11 parameter curves of wave filter are as shown in figure 12, referring to Figure 12, S11 parameters The circle that curve is located at Smith chart center and surrounds is smaller, and now, S11 parameter curves are preferably converged in Smith chart At 50 ohm of the heart, the better astringency of S11 parameter curves.When antenna environment load change turns to Z₁When, from above-mentioned table 2, this When communication terminal be in hand holding state, if the now impedance of impedance matching circuit still be initial matching impedance, the S11 of wave filter Parameter curve can be as shown in figure 13, and referring to Figure 13, the circle that S11 parameter curves are surrounded is larger, and now, S11 parameter curves cannot Converge at 50 ohm of the center of Smith chart, the convergence of S11 parameter curves is poor, such case can cause communication terminal Reception index and the severe exacerbation such as launching target.And in embodiments of the present invention, load acquiring unit can in real time obtain day Thread environment is loaded, and is Z when load acquiring unit gets antenna environment load₁When, processing unit can with query load with match The corresponding relation (such as the corresponding relation shown in table 1 or table 2) of impedance, obtains antenna environment load Z₁Corresponding matching impedance, And the matching impedance is defined as object matching impedance, the object matching impedance is optimal matching impedance, according to table 1 or table 2 Understand, object matching impedance is shunt capacitance C₁₁With series inductance L₂₁+L₂₂, processing unit adjusts the impedance of impedance matching circuit Whole is shunt capacitance C₁₁With series inductance L₂₁+L₂₂, it is ensured that the S11 parameter curves of wave filter load Z in antenna environment₁Under have Good convergence, now, the S11 parameter curves of wave filter can be as shown in figure 14, and referring to Figure 14, S11 parameter curves are located at The Smith chart center and circle for surrounding is smaller, now, S11 parameter curves preferably converge on 50 ohm of Smith chart center Place, the better astringency of S11 parameter curves.The embodiment of the present invention is by according to antenna environment adjustment of load impedance matching circuit Impedance, weakens constringent influence of the change of antenna environment load on the S11 parameter curves of wave filter, solves due to day Thread environment loads the problem that the convergence of the S11 parameter curves of the caused wave filter that changes is deteriorated, and improves communication terminal Reception index and launching target.

Antenna load coalignment provided in an embodiment of the present invention ensure that wave filter under different antennae environmental loads The convergence of S11 parameter curves, it is to avoid the index of communication terminal deteriorates, and then avoid being led by the index of communication terminal deteriorates A series of generation of the unfavorable conditions for causing.

Antenna load coalignment provided in an embodiment of the present invention can apply to method hereafter, in the embodiment of the present invention Antenna load matching process and manufacturing theory may refer to the description in hereafter each embodiment.

Figure 15 is refer to, it illustrates a kind of method flow of antenna load matching process provided in an embodiment of the present invention Figure, the antenna load matching process can be used for communication terminal, and communication terminal can be born including the antenna shown in wave filter and Fig. 2 Coalignment 20 is carried, as shown in Fig. 2 antenna load coalignment 20 includes processing unit 21, impedance matching circuit 22 and load Acquiring unit 23.Referring to Figure 15, the antenna load matching process can include：

Step 1501, load acquiring unit obtain the antenna environment load of communication terminal.

Step 1502, processing unit are loaded according to antenna environment, inquire about default antenna load corresponding with matching impedance Relation.

Step 1503, processing unit determine object matching impedance according to Query Result.

The impedance of impedance matching circuit is set to object matching impedance by step 1504, processing unit.

In sum, antenna load matching process provided in an embodiment of the present invention, due to the input of impedance matching circuit It is connected with the output end of wave filter, load acquiring unit can obtain the antenna environment load of communication terminal, and processing unit can Loaded according to antenna environment, inquire about the corresponding relation of default load and matching impedance and object matching is determined according to Query Result Impedance, object matching impedance is set to by the impedance of impedance matching circuit, therefore, processing unit can be loaded according to antenna environment The impedance of impedance matching circuit is adjusted, the impedance of impedance matching circuit is matched with antenna load, it is ensured that the filtering of communication terminal The S11 parameter curves of device convergence in different environments, improves the applicability of communication terminal.

Wherein, load acquiring unit can include signal transmitting and receiving module and signal coupling module, and signal transmitting and receiving module is specific Can be transceiver, signal coupling module can specifically include that power coupler and coupler are switched, in step 1501, can be with Transmitting coupled signal and reflection coupling signal are obtained by signal coupling module, by signal transmitting and receiving module according to transmitting coupling letter Number and reflection coupling signal of change antenna environment load.

Alternatively, processing unit can be born according to the antenna environment load query obtained in step 1501 in step 1502 Carry with the corresponding relation of matching impedance, for example, processing unit inquires about above-mentioned table 1 or the corresponding relation shown in table 2.Wherein, load With the characterization table that the corresponding relation of matching impedance is specifically as follows load-matching impedance, each load in this feature table Corresponding matching impedance can be set by theoretical calculation, empirical value, characterize various methods acquisitions such as table calibration system, this hair Bright embodiment is not construed as limiting to this.

Alternatively, initial matching impedance can be set in load and the corresponding relation of matching impedance, locates in step 1503 Reason unit can determine object matching impedance according to Query Result, specifically, be deposited when in corresponding relation of the load with matching impedance When corresponding matching impedance is loaded with antenna environment, processing unit can will be corresponding with antenna environment load according to Query Result Matching impedance be defined as object matching impedance, when not existing in load with the corresponding relation of matching impedance and antenna environment load During corresponding matching impedance, processing unit can will be defined as object matching impedance according to Query Result with initial matching impedance.

Alternatively, the impedance of impedance matching circuit can be set to object matching resistance by processing unit in step 1504 It is anti-.Specifically, processing unit can determine the match-type of object matching impedance, and according to the matching class of object matching impedance Type, object matching impedance is set to by the impedance of impedance matching circuit.Wherein, match-type is used to indicate object matching impedance Connection in series-parallel type, for example, match-type can for shunt capacitance-series capacitance type, shunt capacitance-series inductance type and Connection inductance-series capacitance type, shunt capacitance-series capacitance type, shunt capacitance-series capacitance-shunt capacitance type, parallel connection Electric capacity-series inductance-shunt inductance type etc..In embodiments of the present invention, load and the corresponding relation of matching impedance can be with Storage match-type, processing unit query load can be obtained by matching for object matching impedance with the corresponding relation of matching impedance Type, concrete implementation process may be referred to said apparatus embodiment, will not be repeated here.

It should be noted that：Antenna load matching process provided in an embodiment of the present invention can mutually join with device embodiment Examine, the principle of the antenna load matching process that above-described embodiment is provided has been carried out in antenna load coalignment embodiment Describe in detail, it implements process and may be referred to device embodiment, repeats no more here.

The embodiment of the present invention additionally provides a kind of communication terminal, and the communication terminal can include wave filter and above-described embodiment Described in antenna load coalignment.Other structures in the communication terminal may be referred to shown in Fig. 1, the embodiment of the present invention Will not be repeated here.

One of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment can be by hardware To complete, it is also possible to instruct the hardware of correlation to complete by program, described program can be stored in a kind of computer-readable In storage medium, storage medium mentioned above can be read-only storage, disk or CD etc..

The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.

Claims

1. a kind of antenna load coalignment, it is characterised in that for communication terminal, the communication terminal includes wave filter and institute Antenna load coalignment is stated, the antenna load coalignment includes：Processing unit, impedance matching circuit and load obtain single Unit, the input of the impedance matching circuit is connected with the output end of the wave filter,

The processing unit, for being loaded according to the antenna environment, inquires about the corresponding relation of default load and matching impedance, Object matching impedance is determined according to Query Result, the impedance of the impedance matching circuit is set to the object matching impedance.

2. antenna load coalignment according to claim 1, it is characterised in that

The processing unit, is used for：

When existing in the corresponding relation with the antenna environment corresponding matching impedance of load, will be born with the antenna environment Carry corresponding matching impedance and be defined as the object matching impedance；

When not existing in the corresponding relation with the antenna environment corresponding matching impedance of load, by default initial matching Impedance is defined as the object matching impedance.

3. antenna load coalignment according to claim 1, it is characterised in that

The processing unit, is additionally operable to determine the match-type of the object matching impedance, according to the object matching impedance Match-type, the object matching impedance is set to by the impedance of the impedance matching circuit.

4. according to any described antenna load coalignment of claims 1 to 3, it is characterised in that

The impedance matching circuit includes：First adjustment circuit in parallel and the first series control circuit, the described first adjustment in parallel Input of the one end of one end of circuit and first series control circuit respectively with the impedance matching circuit is connected, described The other end ground connection of the first adjustment circuit in parallel, the other end and the impedance matching circuit of first series control circuit Output end is connected；

Or, the impedance matching circuit includes：Second adjustment circuit in parallel, the second series control circuit and the 3rd adjustment in parallel Circuit, one end of second adjustment circuit in parallel and one end of second series control circuit respectively with the impedance matching The input connection of circuit, the other end connection of one end and second series control circuit of the described 3rd adjustment circuit in parallel The output end with the impedance matching circuit is connected respectively, the other end of second adjustment circuit in parallel and described 3rd in parallel The other end of adjustment circuit is grounded respectively；

Or, the impedance matching circuit includes：3rd series control circuit, the 4th adjustment circuit in parallel and the 4th series connection adjustment Circuit, one end of the 3rd series control circuit is connected with the input of the impedance matching circuit, and the 3rd series connection is adjusted One end of the other end of whole circuit and the 4th series control circuit connects with one end of the 4th adjustment circuit in parallel respectively Connect, the other end ground connection of the 4th adjustment circuit in parallel, the other end of the 4th series control circuit and the impedance Output end connection with circuit.

5. antenna load coalignment according to claim 4, it is characterised in that

Described first adjustment circuit in parallel includes：First single-pole double-throw switch (SPDT), the first capacitor array and the first electric inductance array, it is described First electric inductance array includes：First SP3T switch, the second SP3T switch and three the first inductance being sequentially connected in series；

The moved end of first single-pole double-throw switch (SPDT) is connected with the input of the impedance matching circuit, first not moved end with it is described First SP3T switch moved end connection, second not moved end be connected with the first end of first capacitor array；Described first First end of the moved end respectively with three first inductance does not connect one to one three of SP3T switch, and described second is single Three of the throw switch of knife three do not connect one to one at the second end of the moved end respectively with three first inductance, second hilted broadsword Second end of the moved end of three throw switches and first capacitor array is grounded respectively；

Second series control circuit includes：Second single-pole double-throw switch (SPDT), the second capacitor array and the second electric inductance array, it is described Second electric inductance array includes：3rd SP3T switch, the 4th SP3T switch and three the second inductance being sequentially connected in series；

The moved end of second single-pole double-throw switch (SPDT) is connected with the input of the impedance matching circuit, first not moved end with it is described 3rd SP3T switch moved end connection, second not moved end be connected with the first end of second capacitor array；Described 3rd First end of the moved end respectively with three second inductance does not connect one to one three of SP3T switch, and the described 4th is single Three of the throw switch of knife three do not connect one to one at the second end of the moved end respectively with three second inductance, the 4th hilted broadsword Output end of second end of the moved end of three throw switches and second capacitor array respectively with the impedance matching circuit is connected；

Wherein, in the impedance matching circuit, the control end of all of single-pole double-throw switch (SPDT), the control of all of capacitor array The control end of end and all of SP3T switch is connected with the processing unit respectively.

6. antenna load coalignment according to claim 4, it is characterised in that

Described second adjustment circuit in parallel includes：First single-pole double-throw switch (SPDT), the first capacitor array and the first electric inductance array, it is described First electric inductance array includes：First SP3T switch, the second SP3T switch and three the first inductance being sequentially connected in series；

Described 3rd adjustment circuit in parallel includes：3rd single-pole double-throw switch (SPDT), the 3rd capacitor array and the 3rd electric inductance array, it is described 3rd electric inductance array includes：5th SP3T switch, the 6th SP3T switch and three the 3rd inductance being sequentially connected in series；

The moved end of the 3rd single-pole double-throw switch (SPDT) is connected with the output end of the impedance matching circuit, first not moved end with it is described 5th SP3T switch moved end connection, second not moved end be connected with the first end of the 3rd capacitor array；Described 5th First end of the moved end respectively with three the 3rd inductance does not connect one to one three of SP3T switch, and the described 6th is single Three of the throw switch of knife three do not connect one to one at the second end of the moved end respectively with three the 3rd inductance, the 6th hilted broadsword Second end of the moved end of three throw switches and the 3rd capacitor array is grounded respectively；

7. antenna load coalignment according to claim 4, it is characterised in that

3rd series control circuit includes：First single-pole double-throw switch (SPDT), the first capacitor array and the first electric inductance array, it is described First electric inductance array includes：First SP3T switch, the second SP3T switch and three the first inductance being sequentially connected in series；

The moved end of first single-pole double-throw switch (SPDT) is connected with the input of the impedance matching circuit, first not moved end with it is described First SP3T switch moved end connection, second not moved end be connected with the first end of first capacitor array；Described first First end of the moved end respectively with three first inductance does not connect one to one three of SP3T switch, and described second is single Three of the throw switch of knife three do not connect one to one at the second end of the moved end respectively with three first inductance, second hilted broadsword Second end of the moved end of three throw switches and first capacitor array is connected with first node respectively；

Described 4th adjustment circuit in parallel includes：Second single-pole double-throw switch (SPDT), the second capacitor array and the second electric inductance array, it is described Second electric inductance array includes：3rd SP3T switch, the 4th SP3T switch and three the second inductance being sequentially connected in series；

The moved end of second single-pole double-throw switch (SPDT) is connected with the first node, the first not moved end and the 3rd SP3T Switch moved end connection, second not moved end be connected with the first end of second capacitor array；3rd SP3T switch Three not first end of the moved end respectively with three second inductance connect one to one, the 4th SP3T switch Three not second end of the moved end respectively with three second inductance connect one to one, the 4th SP3T switch it is dynamic Second end of end and second capacitor array is grounded respectively；

4th series control circuit includes：3rd single-pole double-throw switch (SPDT), the 3rd capacitor array and the 3rd electric inductance array, it is described 3rd electric inductance array includes：5th SP3T switch, the 6th SP3T switch and three the 3rd inductance being sequentially connected in series；

The moved end of the 3rd single-pole double-throw switch (SPDT) is connected with the first node, the first not moved end and the 5th SP3T Switch moved end connection, second not moved end be connected with the first end of the 3rd capacitor array；5th SP3T switch Three not first end of the moved end respectively with three the 3rd inductance connect one to one, the 6th SP3T switch Three not second end of the moved end respectively with three the 3rd inductance connect one to one, the 6th SP3T switch it is dynamic Output end of second end of end and the 3rd capacitor array respectively with the impedance matching circuit is connected；

8. according to any described antenna load coalignment of claims 1 to 3, it is characterised in that the load acquiring unit Including：Signal transmitting and receiving module and signal coupling module,

The signal transmitting and receiving module, for being input into transmission signal to the signal coupling module；

The signal coupling module, for obtaining transmitting coupled signal and reflection coupling signal, and to the signal transmitting and receiving module Input transmitting coupled signal and the reflection coupling signal, the transmitting coupled signal is the coupling letter of the transmission signal Number, the reflection coupling signal is the coupled signal of the reflected signal of the transmission signal；

The signal transmitting and receiving module, is additionally operable to, according to transmitting coupled signal and the reflection coupling signal, calculate the day Thread environment is loaded.

9. a kind of antenna load matching process, it is characterised in that for communication terminal, the communication terminal includes wave filter and power Profit requires 1 to 8 any described antenna load coalignment, and the antenna load coalignment includes：Processing unit, impedance With circuit and load acquiring unit, methods described includes：

The processing unit is loaded according to the antenna environment, inquires about the corresponding relation of default antenna load and matching impedance；

10. method according to claim 9, it is characterised in that the processing unit is by the resistance of the impedance matching circuit It is anti-to be set to the object matching impedance, including：

The processing unit determines the match-type of the object matching impedance；

Be set to for the impedance of the impedance matching circuit according to the match-type of the object matching impedance by the processing unit The object matching impedance.

11. a kind of communication terminals, it is characterised in that the communication terminal includes：Wave filter and claim 1 to 8 are any described Antenna load coalignment.