CN106877832A - Antenna load matching process and device, communication terminal - Google Patents
Antenna load matching process and device, communication terminal Download PDFInfo
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- CN106877832A CN106877832A CN201710076470.XA CN201710076470A CN106877832A CN 106877832 A CN106877832 A CN 106877832A CN 201710076470 A CN201710076470 A CN 201710076470A CN 106877832 A CN106877832 A CN 106877832A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
- H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
- H03H2/006—Transmitter or amplifier output circuits
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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
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) transmittinginSequentially 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 couplerinIt 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 exportsinIn 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 Sreflect.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 Sreceive。
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 1inCarry out
Coupling obtains transmitting coupled signal Sco-in, and from port 4 by transmission signal SinExport 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 3reflectWith reception signal SreceiveCouple and obtain reflection coupling letter
Number Sco-re, and from port 3 by reflection coupling signal Sco-reExport signal transmitting and receiving module 231, the basis of signal transmitting and receiving module 231
The transmitting coupled signal S for receivingco-inWith reflection coupling signal Sco-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 Sco-inWith reflection coupling signal Sco-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 Sco-reIt is actual
On be power coupler to reflected signal SreflectWith reception signal SreceiveCombining signal carry out coupling what is obtained, but due to
Reflected signal SreflectIntensity be far longer than reception signal SreceiveIntensity so that in coupled signal calculating process can neglect
Slightly receive signal Sreceive, the intensity of coupled signal can only have by reflected signal SreflectDetermine, therefore, will be to reflected signal
SreflectWith reception signal SreceiveThe coupled signal referred to as reflection coupling signal S that obtains of combining signalco-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 ZN+1, then processing unit 21 is according to antenna environment load ZN+1Corresponding relation shown in inquiry table 1, it is impossible to
Inquire and load Z with antenna environmentN+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.
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.
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.
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.
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 (11)
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 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 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;
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;
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;
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.
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;
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.
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 load acquiring unit obtains the antenna environment load of communication terminal;
The processing unit is loaded according to the antenna environment, inquires about the corresponding relation of default antenna load and matching impedance;
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.
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.
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