CN104272584B - A kind of Linc Power Amplifier Combining Circuits - Google Patents
A kind of Linc Power Amplifier Combining Circuits Download PDFInfo
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- CN104272584B CN104272584B CN201380004307.2A CN201380004307A CN104272584B CN 104272584 B CN104272584 B CN 104272584B CN 201380004307 A CN201380004307 A CN 201380004307A CN 104272584 B CN104272584 B CN 104272584B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0294—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers using vector summing of two or more constant amplitude phase-modulated signals
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High frequency amplifiers, e.g. radio frequency amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
- H03F3/245—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages with semiconductor devices only
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/204—A hybrid coupler being used at the output of an amplifier circuit
Abstract
The embodiment of the present invention provides a kind of Linc Power Amplifier Combining Circuits, and load balance factor can be utilized to improve the efficiency of power amplifier, and flexible design, there is single electric bridge isolation end.The Linc Power Amplifier Combining Circuits include Outphasing modulator, the first power amplifier, the second power amplifier, the first adjustment circuit, the second adjustment circuit, mixed electrical bridge combiner, output circuit, passive microwave circuit；Wherein, first power amplifier and second power amplifier are connected between two output ends of the Outphasing modulator and first adjustment circuit, second adjustment circuit, first adjustment circuit and second adjustment circuit are also connected with two inputs of mixed electrical bridge combiner respectively, and the output circuit and the passive microwave circuit in-phase output end respectively with the mixed electrical bridge combiner, out-phase output end are connected.The present invention is applied to wireless communication field.
Description
Technical field
The present invention relates to wireless communication field, more particularly to a kind of Linc Power Amplifier Combining Circuits.
Background technology
Linc power amplifiers are the signals that amplitude all the way and phase are changed over time, and are decomposed into the signal of two-way constant amplitude out-phase,
Respectively through a kind of power amplifier that power amplifier is combined.The Linc power amplifiers make full use of the amplifier can expeditiously to put
The characteristics of big constant envelope signal, the high efficiency of overall power amplifier is reached using efficient path combining method.
Linc power amplifiers are included using the Linc power amplifier technologies of Chireix combiners (out-phase combiner) and using matching
The Linc power amplifier technologies of hybird electric bridges (mixed electrical bridge).In the prior art, using the Linc power amplifier technologies of Chireix combiners
More detailed description in Fig. 1 is incited somebody to action, it is in Outphasing modulator by envelope-modulated bandpass sinIt is decomposed into the constant of two out-phase
Envelope signal s1And s2, they are applied to power amplifier, and the output of power amplifier is combined in hybrid devices,
So as to recover envelope-modulated waveform.Output signal s after amplificationoutOutput amplitude be signal s1And s2Between phase shift result,
When the signals are in phase, Amplitude maxima is obtained, and when anti-phase, obtains amplitude min value.Mixture construction is compensated by using
Reactance network replaces impedance load, is able to expand to efficient region including relatively low output power stage, thus keeps higher
Efficiency.But in the path combining method, the design of output combinational network is limited by more, the electrical length limitation of microstrip line
In certain numerical value, the flexibility of design is have impact on；And because without single electric bridge isolation end so that cannot be to being lost in signal
The part matched somebody with somebody carries out coupling sampling to use digital enhancement technique.
In the prior art, such as schemed using the circuit block diagram of the Linc power amplifier technologies of the hybird electric bridges (mixed electrical bridge) of matching
Shown in 2, the technology is with the distinctive points of the Linc power amplifier technologies of the use Chireix combiners shown in Fig. 1, two in Fig. 2
The constant envelope signals s of out-phase1And s2After being respectively applied to power amplifier A, B, respectively through circuit A and the tune of circuit B
System, is then exported by mixed electrical bridge combiner, and A, B are exported with the signal of phase through oversampling circuit C, and the signal of the non-same phase of A, B is then passed through
Isolation end 4 is crossed to consume in load.Although the method has single electric bridge isolation end, but due to being only simple combining, nothing
Method using load balance factor improve two-way power amplifier efficiency, have more power dissipation isolation end load on.
The content of the invention
The embodiment of the present invention provides a kind of Linc Power Amplifier Combining Circuits, and load balance factor can be utilized to improve the efficiency of power amplifier,
And, there is single electric bridge isolation end in flexible design so that can to the part of mismatch in signal carry out coupling sampling so that
Use digital enhancement technique.
To reach above-mentioned purpose, the embodiment of the present invention is adopted the following technical scheme that：
A kind of first aspect, there is provided Linc Power Amplifier Combining Circuits, the Linc Power Amplifier Combining Circuits include Outphasing modulator,
First power amplifier, the second power amplifier, the first adjustment circuit, the second adjustment circuit, mixed electrical bridge combiner, output electricity
Road, passive microwave circuit；
Wherein, first power amplifier and second power amplifier are connected to the Outphasing modulator
Between two output ends and first adjustment circuit, second adjustment circuit, first adjustment circuit and described second
Adjustment circuit is also connected with two inputs of mixed electrical bridge combiner respectively, the output circuit and the passive microwave circuit
In-phase output end respectively with the mixed electrical bridge combiner, out-phase output end are connected；
First adjustment circuit, second adjustment circuit, the output circuit coordinate with the passive microwave circuit
Effect, to cause that the amplitude of output signal of first power amplifier and second power amplifier is less than first threshold
When, there is new efficiency extreme point.
In the first possible implementation, with reference in a first aspect, the passive microwave circuit is specifically included：
Microstrip line (wherein, the electrical length of the microstrip line by the new efficiency extreme point position, and described first
Adjustment circuit determines with second adjustment circuit；
The passive microwave circuit is connected with the out-phase output end of the mixed electrical bridge circuit device and specifically includes：
The microstrip line is connected with the out-phase output end of the mixed electrical bridge circuit.
In second possible implementation, with reference to the first possible implementation, the microstrip line is also grounded.
In the third possible implementation, with reference to the first possible implementation, the Linc power amplifiers combining electricity
Road also includes first resistor；
The microstrip line is also connected with the first resistor, and the first resistor is also grounded, wherein, the first resistor
Resistance is more than Second Threshold, to cause that the microstrip line is approximately opened a way.
In the 4th kind of possible implementation, with reference to first aspect or the first possible implementation, the Linc
Power Amplifier Combining Circuit also includes coupling sample circuit, digital domain circuits；
Wherein, the digital domain circuits include the Outphasing modulator, and the coupling sample circuit is connected to the mixing
Between the out-phase output end of electric bridge combiner and the digital domain circuits, the output end of the digital domain circuits is respectively with described
One power amplifier, second power amplifier are connected；
The coupling sample circuit, for detecting the out-phase combing signal in the Linc Power Amplifier Combining Circuits；
The digital domain circuits, for the out-phase combing signal collected according to the coupling sample circuit, to defeated
The signal for entering first power amplifier and second power amplifier does numeral pretreatment, to cause to reach digital enhancing
Effect.
In the 5th kind of possible implementation, with reference to the 4th kind of possible implementation, the coupling sample circuit bag
Include second resistance；
Wherein, the second resistance is used to adjust voltage, the proportioning of electric current for entering the coupling sample circuit.
In the 6th kind of possible implementation, according to the 4th kind of possible implementation or the 5th kind of possible realization side
Formula, the digital domain circuits are described to input for the out-phase combing signal collected according to the coupling sample circuit
The signal of the first power amplifier and second power amplifier does numeral pretreatment, to cause that reaching digital enhancement effect has
Body includes：
According to the out-phase combing signal that the coupling sample circuit is collected, the Linc Power Amplifier Combining Circuits are adjusted
The amplitude decomposed of input signal or angle, to cause the input of first power amplifier and second power amplifier
Signal changes, to reach digital enhancement effect.
In the 7th kind of possible implementation, according to the 4th kind of possible implementation or the 5th kind of possible realization side
Formula, the digital domain circuits are described to input for the out-phase combing signal collected according to the coupling sample circuit
The signal of the first power amplifier and second power amplifier does numeral pretreatment, to cause that reaching digital enhancement effect has
Body includes：
According to the out-phase combing signal that the coupling sample circuit is collected, the Linc Power Amplifier Combining Circuits are adjusted
Input signal, to cause that the input signal of first power amplifier and second power amplifier changes, with
Reach digital enhancement effect.
The embodiment of the present invention provides a kind of Linc Power Amplifier Combining Circuits, and the Linc Power Amplifier Combining Circuits include Chireix modulation
It is device, the first power amplifier, the second power amplifier, the first adjustment circuit, the second adjustment circuit, mixed electrical bridge combiner, defeated
Go out circuit, passive microwave circuit；Wherein, first power amplifier and second power amplifier are connected to described
Between two output ends and first adjustment circuit, second adjustment circuit of Outphasing modulator, the first adjustment electricity
Road and second adjustment circuit are also connected with two inputs of mixed electrical bridge combiner respectively, the output circuit and described
Passive microwave circuit in-phase output end respectively with the mixed electrical bridge combiner, out-phase output end are connected.
Mixed electrical bridge combiner is used for description based on above-described embodiment, the present invention non-isolated of Linc class power amplifiers first
Combining, is matched somebody with somebody by first adjustment circuit, second adjustment circuit, the output circuit with the passive microwave circuit
Cooperation is used so that load balance factor can be utilized to improve the efficiency of two-way power amplifier, you can make first power amplifier and described
Second power amplifier is operated in high efficiency state, while in the Linc Power Amplifier Combining Circuits, first adjustment circuit, institute
State the second adjustment circuit, the output circuit and the passive microwave circuit flexible design, and the Linc Power Amplifier Combining Circuits
In there is single electric bridge isolation end so that can to the part of mismatch in signal carry out coupling sampling with using numeral enhancing skill
Art.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the circuit block diagram of the typical Linc power amplifier technologies for using out-phase combiner in the prior art；
Fig. 2 is the circuit block diagram of the Linc power amplifier technologies of the typical hybird electric bridges for using matching in the prior art；
Fig. 3 is a kind of Linc Power Amplifier Combining Circuits provided in an embodiment of the present invention；
Fig. 4 is a kind of specific design figure of Linc Power Amplifier Combining Circuits provided in an embodiment of the present invention；
Fig. 5 is the specific design figure of another Linc Power Amplifier Combining Circuits provided in an embodiment of the present invention；
Fig. 6 is the specific design figure of another Linc Power Amplifier Combining Circuits provided in an embodiment of the present invention；
Fig. 7 is a kind of simulation result schematic diagram provided in an embodiment of the present invention；
Fig. 8 is another simulation result schematic diagram provided in an embodiment of the present invention；
Fig. 9 is another simulation result schematic diagram provided in an embodiment of the present invention；
Figure 10 is another Linc Power Amplifier Combining Circuit provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1 is typical in the prior art using the Linc power amplifier technologies of out-phase combiner (that is, Chireix combiners)
Circuit block diagram.Signal sinOutphasing modulator 110 is connected to via input 105, the Outphasing modulator 110 includes two outputs
End 115 and 116.sinSignal strength expression be respectively be located at output end 115 and 116 on two output signal s1And s2Between
Phase difference.As shown in figure 1, each output end is connected respectively to power amplifier 120 and 130.The generation of power amplifier 120 and 130
Any kind of B classes unbalanced amplifier of table.Therefore, in Outphasing modulator 110, from envelope-modulated bandpass waveform sinDecomposite
Two constant envelope signals s of out-phase1And s2.The output of power amplifier is entered in Chireix types output combinational network 150
Row combines to form the linear signal of amplification.The phase difference of the out-of-phase signal of these constant amplitudes determines by Outphasing modulator 110,
So that the result of vector sum that must be from them produces output signal soutExpectation amplitude.
As shown in figure 1, power amplifier 120,130 is connected to output combinational network 150, the network 150 includes thering is electricity
The two-way transmission line 140,145 of gas length lambda/4 and impedance R, in frequency band wherein λ residing when representing that power amplifier works
The wavelength of frequency of heart, R is to provide the selected output impedance of the power amplifier of maximum power efficiency.Additionally, the network includes two
Individual compensating reactance.That is capacitor C125 and inductor L135, they are used to expand to efficient region including relatively low output
Level.The transmission line is attached in tie point 160, and output end 165 is by the output signal soutFrom tie point 160
It is transmitted to load RL170.Load R after conversionLThe 170 optimum load parallel connections for being equal to institute's power amplifier, i.e. RL=R/2.
Not only be reinserted into amplitude modulation(PAM) in signal by the output combinational network in Fig. 1, and it is also provided to respectfully presenting
To the dynamic adjustment of the impedance of each power amplifier (out-phase).This out-phase of impedance adjusts and causes to pass through each active equipment
DC power reduce with the reduction of the output amplitude after combination, thus output signal amplitude in certain smaller value
When nearby, power amplifier can also keep greater efficiency.
Embodiment one,
The embodiment of the present invention provides a kind of Linc Power Amplifier Combining Circuits 300, specific as shown in figure 3, the Linc power amplifiers are closed
Road circuit 300 includes Outphasing modulator 301, the first power amplifier 302, the second power amplifier 303, the first adjustment circuit
304th, the second adjustment circuit 305, mixed electrical bridge combiner 306, output circuit 307, passive microwave circuit 308.
Wherein, first power amplifier 302 and second power amplifier 303 are connected to the out-phase and adjust
Between two output ends and first adjustment circuit 304, second adjustment circuit 305 of device processed 301, first adjustment
Circuit 304 and second adjustment circuit 305 are also connected with two inputs of the mixed electrical bridge combiner 306 respectively, institute
State output circuit 307 and the passive microwave circuit 308 in-phase output end respectively with the mixed electrical bridge combiner 306, different
Phase output terminal is connected.
First adjustment circuit 304, second adjustment circuit 305, the output circuit 307 and the passive microwave
The mating reaction of circuit 308, to cause the output signal of first power amplifier 302 and second power amplifier 303
Amplitude be less than first threshold when, there is new efficiency extreme point.
Specifically, as shown in figure 3, signal sin via the Outphasing modulator 301 input be input into, sinSignal it is strong
Degree is expressed as two output signal s respectively positioned at the output end of Outphasing modulator 3011And s2Between phase difference.As signal s1With
s2Respectively through first power amplifier 302, the amplification of second power amplifier 303, then respectively through described
After one adjustment circuit 304, the phase adjustment of second adjustment circuit 305 and impedance matching, then enter respectively through 1 end and 2 ends
Enter the mixed electrical bridge combiner 306, by after the combining of the mixed electrical bridge combiner 306, the Linc power amplifiers combining is electric
In-phase signal in road is exported by the output circuit 307, and due to the presence of passive microwave circuit 308, the letter of non-same phase
Number then partly or entirely it is reflected back at non-isolated end 3 so that adjusted in the passive microwave circuit 308 and described first
Under circuit 304, second adjustment circuit 305, the mating reaction of the output circuit 307, first power amplifier 302
When amplitude with the output signal of second power amplifier 303 is less than first threshold, there is new efficiency extreme point, you can
Make first power amplifier and second power amplifier output signal amplitude certain smaller value it is neighbouring when,
Power amplifier can also keep greater efficiency.
It should be noted that in the Linc power amplifier technologies of the existing mixed electrical bridge using matching, because only in power
There is an efficiency extreme point when amplitude of amplifier output signal is certain value near maximum amplitude value, so the power
In addition to the efficiency of amplifier corresponding power amplifier when the output amplitude point near amplitude peak point is higher, output amplitude is smaller
The efficiency of the corresponding power amplifier of point is typically relatively low.And in the present invention, by the passive microwave circuit 308, the output circuit 307
Under first adjustment circuit 304, the mating reaction of second adjustment circuit 305, can cause that first power is put
When the amplitude of the output signal of big device 302 and second power amplifier 303 is less than first threshold, there is new efficiency extreme value
Point.And then, because there is new efficiency extreme point, in the new efficiency extreme point and the amplitude peak point vicinity
Efficiency extreme point between there is the region of greater efficiency so that first power amplifier 302 and second work(
Rate amplifier 303 output signal amplitude certain smaller value it is neighbouring when, power amplifier can also keep greater efficiency.
Wherein, described " being less than first threshold " is to ensure also have new effect when the amplitude of output signal is smaller
Rate extreme point, the embodiment of the present invention is not especially limited to the first threshold.
It should be noted that " new efficiency extreme point " is only theoretical formulation, side circuit is due to quality factor
Etc. reason, may not exist the extreme point, and only exist the efficiency extreme point of amplitude peak vicinity.But can generally deposit
In one " convex " of the efficiency curve caused by " new efficiency extreme point " or " arching upward " so that efficiency is interior in a big way
Higher than the common design for not having " new efficiency extreme point ".
A kind of Linc Power Amplifier Combining Circuits 300 described in the embodiment of the present invention, first by Hybrid combiner (mixing
Electric bridge combiner) for Linc class power amplifiers non-isolated combining, by first adjustment circuit, second adjustment circuit,
With the passive microwave circuit, the mating reaction of the output circuit so that load balance factor can be utilized to improve two-way power amplifier
Efficiency, you can make first power amplifier and second power amplifier in the amplitude of output signal in certain smaller value
It is neighbouring when, power amplifier can also keep greater efficiency.Simultaneously in the Linc Power Amplifier Combining Circuits, first adjustment circuit, institute
State the second adjustment circuit, the output circuit and the passive microwave circuit flexible design, and the Linc Power Amplifier Combining Circuits
In there is single electric bridge isolation end so that can to the part of mismatch in signal carry out coupling sampling with using numeral enhancing skill
Art.
Particularly, the passive microwave circuit 308 can specifically include：Microstrip line, wherein the electrical length of the microstrip line
Determined with second adjustment circuit by the new efficiency extreme point, and first adjustment circuit.
The passive microwave circuit is connected with the out-phase output end of mixed electrical bridge combiner can specifically be included：
The microstrip line is connected with the out-phase output end of mixed electrical bridge combiner.
Wherein, the microstrip line can be open circuit, it is also possible to be grounded, the embodiment of the present invention is not especially limited to this.
It should be noted that first adjustment circuit, second adjustment circuit, the design of the output circuit are also outstanding
For important, but the method for designing of these circuits refers to the A of circuit in the prior art as shown in Figure 2, circuit B, circuit C and sets
Meter method, the embodiment of the present invention is repeated no more to this.
Specifically, as shown in figure 4, exemplary here provide a kind of specific design figure of Linc Power Amplifier Combining Circuits, its
In, first adjustment circuit 304 is made up of microstrip line A and electric capacity C, and second adjustment circuit 305 is by microstrip line B and inductance
L is constituted, and the passive microwave circuit 308 is made up of microstrip line D, wherein, the microstrip line D open circuits are the microstrip line A, described
Microstrip line B, the electrical length of the microstrip line D are respectively the δ of δ, λ/4+ δ, k* λ/2+ λ/4), wherein, 0≤δ≤λ/4, k=0 (1 (2
(3 ....
In Linc Power Amplifier Combining Circuits as shown in Figure 4, first adjustment circuit 304, second adjustment circuit
305th, the output circuit 307 and the mating reaction of the passive microwave circuit 308 so that the He of the first power amplifier 302
When the amplitude of the output signal of second power amplifier 303 is less than first threshold, there is new efficiency extreme point, you can with
So that the amplitude in first power amplifier 302 and the output signal of second power amplifier 303 is smaller at certain
Value it is neighbouring when, power amplifier can also keep greater efficiency.
Optionally, as shown in figure 5, the embodiment of the present invention gives a kind of specific design side of Linc Power Amplifier Combining Circuits
Case, wherein, first adjustment circuit 304 is made up of microstrip line A and electric capacity C, and second adjustment circuit 305 is by microstrip line B
Constituted with inductance L, the passive microwave circuit 308 is made up of microstrip line D+ first resistors R1, wherein, the first resistor R1's
One end is connected with microstrip line D, and other end ground connection, the first resistor is more than Second Threshold, to cause that the microstrip line is approximately opened
Road.
Wherein, the microstrip line A, the microstrip line B, the electrical length of the microstrip line D are respectively δ, λ/4+ δ, k* λ/2+
The δ of λ/4), wherein, 0≤δ≤λ/4, k=0 (1 (2 (3 ....
It should be noted that the Second Threshold is to ensure that the microstrip line can after the first resistor is grounded
Approximately to open a way, the size to the Second Threshold is not especially limited.
The Linc Power Amplifier Combining Circuits shown in Linc Power Amplifier Combining Circuits and Fig. 5 shown in Fig. 4 are only in microstrip line open circuit
Implementation on it is different, the embodiment of the present invention is just repeated no more to the Linc Power Amplifier Combining Circuits shown in described Fig. 5, tool
Body refers to the description of the Linc Power Amplifier Combining Circuits shown in Fig. 4.
Optionally, as shown in fig. 6, the embodiment of the present invention gives a kind of specific design side of Linc Power Amplifier Combining Circuits
Case, wherein, differed only in Linc Power Amplifier Combining Circuits shown in Fig. 4 in the Linc Power Amplifier Combining Circuits shown in Fig. 6,
In Linc Power Amplifier Combining Circuits shown in Fig. 6, passive microwave circuit 308 is specially microstrip line ground connection, equivalent to microstrip line short circuit.
And in the Linc Power Amplifier Combining Circuits shown in Fig. 4, passive microwave circuit 308 is specially microstrip line open circuit, certainly, because circuit sets
The change of meter, in the Linc Power Amplifier Combining Circuits shown in Fig. 6, microstrip line A, microstrip line B, the electrical length of microstrip line D also change
Become, respectively δ,、λ/4+δ,、k*λ/2+λ/4)δ,, wherein, 0≤δ,≤ λ/4, k=0 (1 (2 (3 ....
Wherein, first adjustment circuit 304, second adjustment circuit 305, the output circuit 307 and the nothing
The mating reaction of source microwave circuit 308 so that the output of first power amplifier 302 and second power amplifier 303
When the amplitude of signal is less than first threshold, there is new efficiency extreme point, you can to cause in first power amplifier 302
With the amplitude of the output signal of second power amplifier 303 certain smaller value it is neighbouring when, power amplifier can also keep higher
Efficiency.
It should be noted that the electrical length of microstrip line involved in Fig. 4, Fig. 5, Fig. 6 can be according to the new effect
The electrical length of microstrip line in the position of rate extreme point, and the first adjustment circuit and the second adjustment circuit, by circuit simulation with
And determine after realistic simulation, the embodiment of the present invention is not especially limited to this, only provides two kinds of Linc Power Amplifier Combining Circuits
Specific design scheme.
It should be noted that the circuit that Fig. 4, Fig. 5, Fig. 6 are given also has other equivalents, such as electric capacity C is with a certain
Microstrip line replacement of electrical length etc., the embodiment of the present invention is not especially limited to this, it is critical only that equivalent electrical length unanimously i.e.
Can.
For the description of above-described embodiment, the embodiment of the present invention it is exemplary provide three kinds of simulation results, respectively as Fig. 7,
Shown in Fig. 8, Fig. 9.Wherein,
Emulation one shown in Fig. 7 is the Linc work(using the hybird electric bridges for using matching in the prior art shown in Fig. 2
The phase that the circuit block diagram emulation of discharge technique draws) efficiency chart；
Emulation two shown in Fig. 8 emulates what is drawn for the Linc Power Amplifier Combining Circuits provided using the present invention shown in Fig. 3
Phase) efficiency chart；
Emulation three shown in Fig. 9 is that the design of inappropriate passive microwave circuit is finally emulated on the basis of emulation two
The phase for going out) efficiency chart.
These three emulation are illustrated respectively below：
Emulation one：Circuit block diagram with reference to shown in Fig. 2, first power amplifier and second power amplifier are adopted
With preferable B power-like amplifiers model；Benefit of the phase angle of two-way out-of-phase signal relative to the angle at composite signal phase angle
Angle is that (wherein, theta is scanned to 90 degree theta from 0 degree, as shown in fig. 7, when the out-phase output end reality of mixed electrical bridge combiner
When having showed good isolation matching, the output impedance of two-way power amplifier does not change with the change of theta, illustrates the negative of two-way power amplifier
Load is stable, will not be changed with the change of signal, and when theta gets over hour, the power wasted onto isolation end load is got over
Greatly.
It should be noted that the emulation is only a special case ideally, for actual power amplifier and its
The power amplifier of its type, reflection coefficient curve and efficiency curve may be incomplete same, but do not influence to isolate matching principle
With the generality of effect.
Emulation two：Circuit block diagram with reference to shown in Fig. 3, first power amplifier and second power amplifier are adopted
With preferable B power-like amplifiers model；Benefit of the phase angle of two-way out-of-phase signal relative to the angle at composite signal phase angle
Angle is that (wherein, theta is scanned to 90 degree theta from 0 degree, as shown in figure 8, when the out-phase output end reality of mixed electrical bridge combiner
When existing non-isolated is matched, the simulation result in left side shows, the output impedance of two-way power amplifier changes with the change of theta, one
Theta subtended angles corresponding impedance curve in part is more nearly the high efficiency region of preferable power amplifier (real axis and its near), illustrates two
The load of road power amplifier is unstable, and the simulation result on right side shows, when theta is near 20 degree, new efficiency occurs
Extreme point, theta be 20) value between 90 degree when, the efficiency of power amplifier is just constantly in 70% or so, and illustrate each other is negative
Carry draw and cause that power amplifier is operated in high efficiency state.
Equally, it is necessary to explanation is that the emulation is only a special case ideally, for actual power amplifier
And other types of power amplifier, reflection coefficient curve may be incomplete same, but does not influence Hybird non-isolated to match
And cause the principle of active load traction and the generality of effect.
By the contrast of the simulation result of the emulation two shown in the simulation result and Fig. 8 of the emulation one shown in Fig. 7, also intuitively
The Linc Power Amplifier Combining Circuits reflected in the embodiment of the present invention can utilize load balance factor improve power amplifier efficiency.
Emulation three：On the basis of above-mentioned emulation two, the design of the passive microwave circuit is carried out into certain change, from
The simulation result of Fig. 9 can see, the design of inappropriate passive microwave circuit so that the active load that non-isolated matching is produced
Draw and do not have obvious effect relative to the isolation matching of emulation one.
By the contrast of the simulation result of the emulation three shown in the simulation result and Fig. 9 of the emulation two shown in Fig. 8, also intuitively
The design for reflecting passive microwave circuit not necessarily cause efficient load-pulling effect, it is necessary to according to specific power amplification
The position of the high efficiency region of device, then designs first adjustment circuit 304, second adjustment circuit 305 and passive
The correspondence design of microwave circuit 308 and output circuit 307 so that active caused by the non-isolated matching of passive microwave circuit 308
First power amplifier 302 and second power amplifier 303 are drawn to efficient working condition by load balance factor.
Further, the Linc Power Amplifier Combining Circuits also include coupling sample circuit, digital domain circuits.
Wherein, the digital domain circuits are connected to the mixing comprising the Outphasing modulator, the coupling sample circuit
Between the out-phase output end of electric bridge combiner and the digital domain circuits, the output end of the digital domain circuits is respectively with described
One power amplifier, second power amplifier are connected.
The coupling sample circuit, for detecting the out-phase combing signal in the Linc Power Amplifier Combining Circuits.
The digital domain circuits, for the out-phase combing signal collected according to the coupling sample circuit, to defeated
The signal for entering first power amplifier and second power amplifier does numeral pretreatment, to cause to reach digital enhancing
Effect.
Specifically, as shown in Figure 10, the embodiment of the present invention also provides a kind of Linc Power Amplifier Combining Circuits 300, the Linc
Power Amplifier Combining Circuit 300 includes that Outphasing modulator 301, the first power amplifier 302, the second power amplifier 303, first are adjusted
Circuit 304, the second adjustment circuit 305, mixed electrical bridge combiner 306, output circuit 307, passive microwave circuit 308, coupling are adopted
Sample circuit 309, digital domain circuits 310.
Wherein, first power amplifier 302 and second power amplifier 303 are connected to the out-phase and adjust
Between two output ends and first adjustment circuit 304, second adjustment circuit 305 of device processed 301, first adjustment
Circuit 304 and second adjustment circuit 305 are also connected with two inputs of the mixed electrical bridge combiner 306 respectively, institute
State output circuit 307 and the passive microwave circuit 308 in-phase output end respectively with the mixed electrical bridge combiner 306, different
Phase output terminal is connected, and the coupling sample circuit 309 is connected to the digital domain circuits 310 with the mixed electrical bridge combiner
Between 306 out-phase output end, the output end of the digital domain circuits 310 respectively with first power amplifier 302, described
Second power amplifier 303 is connected.
Specifically, as shown in Figure 10, signal sinIt is input into via the input of the Outphasing modulator 301, sinSignal it is strong
Degree is expressed as two output signal s respectively positioned at the output end of the Outphasing modulator 3011And s2Between phase difference.Work as signal
s1And s2Respectively through first power amplifier 302, the amplification of second power amplifier 303, then respectively through described
After first adjustment circuit 304, the phase adjustment of second adjustment circuit 305 and impedance matching, then respectively through 1 end and 2 ends
Into the mixed electrical bridge combiner 306, by after the combining of the mixed electrical bridge combiner 306, the Linc power amplifiers combining
In-phase signal in circuit is exported by the output circuit 307, and due to the presence of the passive microwave circuit 308, it is non-same
The signal of phase is then partly or entirely reflected back at non-isolated end 3 so that in the passive microwave circuit 308 and described
Under one adjustment circuit 304, second adjustment circuit 305, the mating reaction of the output circuit 307, first power is put
When the amplitude of the output signal of big device 302 and second power amplifier 303 is less than first threshold, there is new efficiency extreme value
Point, you can make first power amplifier and second power amplifier in the amplitude of output signal in certain smaller value
When nearby, power amplifier can also keep greater efficiency.
Meanwhile, the coupling sample circuit 309 gathers two-way power amplifier in the Linc Power Amplifier Combining Circuits at non-isolated end 3
Out-phase combing signal, the out-phase combining letter that the digital domain circuits 310 are collected according to the coupling sample circuit 309
Number, the signal to being input into first power amplifier 302 and second power amplifier 303 does numeral pretreatment, so that
Digital enhancement effect must be reached.
It should be noted that the out-phase combing signal collected according to the coupling sample circuit 309, to defeated
The signal for entering first power amplifier 302 and second power amplifier 303 does numeral pretreatment and can specifically include：
According to the out-phase combing signal that the coupling sample circuit 309 is collected, the Linc power amplifiers combining is adjusted
Amplitude or angle that the input signal of circuit is decomposed, and then cause that first power amplifier 302 and second power are put
The input signal of big device 303 changes, and to reach digital enhancement effect, further improves the effect of the Power Amplifier Combining Circuit
Rate.For example：
If the out-phase combing signal collected according to the coupling sample circuit 309 analyzes the Linc power amplifiers combining
The angle that the input signal of circuit is decomposed is larger, then the Outphasing modulator 301 can reduce decomposition when signal decomposition is carried out
Amplitude or reduce the angle for decomposing, the embodiment of the present invention is not especially limited to this.
Or
The out-phase combing signal collected according to the coupling sample circuit 309, to being input into first work(
The signal of rate amplifier 302 and second power amplifier 303 does numeral pretreatment can also specifically be included：
According to the out-phase combing signal that the coupling sample circuit 309 is collected, the Linc power amplifiers combining is adjusted
The input signal of circuit, and then cause the input signal of first power amplifier 302 and second power amplifier 303
Change, to reach digital enhancement effect, further improve the efficiency of the Power Amplifier Combining Circuit.For example：
If the out-phase combing signal collected according to the coupling sample circuit 309 analyzes the Linc power amplifiers combining
The angle that the input signal of circuit is decomposed is larger, then can reduce the phase of the input signal of the Linc Power Amplifier Combining Circuits
Angle.
It should be noted that above-mentioned is only exemplary to provide two kinds and collected according to the coupling sample circuit 309
The out-phase combing signal, the signal to being input into first power amplifier 302 and second power amplifier 303 does number
The method of word pretreatment, the specific design of the different digital domain circuits 310 of this two methods correspondence, of course, it is also possible in the presence of it
The out-phase combing signal that it is collected according to the coupling sample circuit 309, to being input into first power amplifier 302
The method for doing numeral pretreatment with the signal of second power amplifier 303, corresponds to the specific of corresponding digital domain circuits 310
Design, the embodiment of the present invention is repeated no more to this, only illustrates the digital domain circuits 310 for according to the coupling sample circuit
The out-phase combing signal for collecting, the signal to being input into first power amplifier and second power amplifier does
Numeral pretreatment, to cause to reach digital enhancement effect.
Specifically, the coupling sample circuit includes second resistance, wherein, the second resistance is used to adjust described in
The voltage of coupling sample circuit, the proportioning of electric current.
It is of course also possible to adjusted by other circuit designs match somebody with somebody into the voltage of the coupling sample circuit, electric current
Than the embodiment of the present invention is not especially limited to this.
It should be noted that the description of the above-mentioned embodiment based on preferable class-b amplifier, is equally applicable to actual B classes
Or the design of non-class-b amplifier.
The embodiment of the present invention provides a kind of Linc Power Amplifier Combining Circuits, and the Linc Power Amplifier Combining Circuits include Chireix modulation
It is device, the first power amplifier, the second power amplifier, the first adjustment circuit, the second adjustment circuit, mixed electrical bridge combiner, defeated
Go out circuit, passive microwave circuit；Wherein, first power amplifier and second power amplifier are connected to described
Between two output ends and first adjustment circuit, second adjustment circuit of Outphasing modulator, the first adjustment electricity
Road and second adjustment circuit are also connected with two inputs of mixed electrical bridge combiner respectively, the output circuit and described
Passive microwave circuit in-phase output end respectively with the mixed electrical bridge combiner, out-phase output end are connected.
Mixed electrical bridge combiner is used for description based on above-described embodiment, the present invention non-isolated of Linc class power amplifiers first
Combining, is matched somebody with somebody by first adjustment circuit, second adjustment circuit, the output circuit with the passive microwave circuit
Cooperation is used so that load balance factor can be utilized to improve the efficiency of two-way power amplifier, you can make first power amplifier and described
Second power amplifier output signal amplitude certain smaller value it is neighbouring when, power amplifier can also keep greater efficiency, while
In the Linc Power Amplifier Combining Circuits, first adjustment circuit, second adjustment circuit, the output circuit and the nothing
Flexibly, and there is single electric bridge isolation end in source microwave circuits so that can be to letter in the Linc Power Amplifier Combining Circuits
The part of mismatch carries out coupling sampling to use digital enhancement technique in number.
Claims (7)
1. a kind of Linc Power Amplifier Combining Circuits, it is characterised in that：
The Linc Power Amplifier Combining Circuits include Outphasing modulator, the first power amplifier, the second power amplifier, the first adjustment
Circuit, the second adjustment circuit, mixed electrical bridge combiner, output circuit, passive microwave circuit, coupling sample circuit and numeric field electricity
Road；
Wherein, first power amplifier and second power amplifier are connected to two of the Outphasing modulator
Between output end and first adjustment circuit, second adjustment circuit, first adjustment circuit and described second is adjusted
Circuit is also connected with two inputs of mixed electrical bridge combiner respectively, and the output circuit and the passive microwave circuit are distinguished
In-phase output end, out-phase output end with the mixed electrical bridge combiner are connected；
First adjustment circuit, second adjustment circuit, the output circuit and the passive microwave circuit mating reaction,
During causing that the amplitude of the output signal of first power amplifier and second power amplifier is less than first threshold, deposit
In new efficiency extreme point；
The digital domain circuits include the Outphasing modulator, and the coupling sample circuit is connected to the mixed electrical bridge combiner
Out-phase output end and the digital domain circuits between, the output end of the digital domain circuits respectively with first power amplification
Device, second power amplifier are connected；
The coupling sample circuit, for detecting the out-phase combing signal in the Linc Power Amplifier Combining Circuits；
The digital domain circuits, for the out-phase combing signal collected according to the coupling sample circuit, to input institute
The signal for stating the first power amplifier and second power amplifier does numeral pretreatment, to cause to reach numeral enhancing effect
Really.
2. Linc Power Amplifier Combining Circuits according to claim 1, it is characterised in that the passive microwave circuit is specifically wrapped
Include：
Microstrip line, wherein, the electrical length of the microstrip line by the new efficiency extreme point position, and first adjustment
Circuit determines with second adjustment circuit；
The passive microwave circuit is connected with the out-phase output end of the mixed electrical bridge circuit device and specifically includes：
The microstrip line is connected with the out-phase output end of the mixed electrical bridge circuit.
3. Linc Power Amplifier Combining Circuits according to claim 2, it is characterised in that the microstrip line is also grounded.
4. Linc Power Amplifier Combining Circuits according to claim 2, it is characterised in that the Linc Power Amplifier Combining Circuits are also wrapped
Include first resistor；
The microstrip line is also connected with the first resistor, and the first resistor is also grounded, wherein, the resistance of the first resistor
More than Second Threshold, to cause that the microstrip line is approximately opened a way.
5. Linc Power Amplifier Combining Circuits according to claim any one of 1-4, it is characterised in that the coupling sample circuit
Including second resistance；
Wherein, the second resistance is used to adjust voltage, the proportioning of electric current for entering the coupling sample circuit.
6. Linc Power Amplifier Combining Circuits according to claim 5, it is characterised in that the digital domain circuits, for basis
The out-phase combing signal that the coupling sample circuit is collected, to input first power amplifier and second work(
The signal of rate amplifier does numeral pretreatment, to cause that reaching digital enhancement effect specifically includes：
According to the out-phase combing signal that the coupling sample circuit is collected, the defeated of the Linc Power Amplifier Combining Circuits is adjusted
Enter the amplitude or angle of signal decomposition, to cause the input signal of first power amplifier and second power amplifier
Change, to reach digital enhancement effect.
7. Linc Power Amplifier Combining Circuits according to claim 5, it is characterised in that the digital domain circuits, for basis
The out-phase combing signal that the coupling sample circuit is collected, to input first power amplifier and second work(
The signal of rate amplifier does numeral pretreatment, to cause that reaching digital enhancement effect specifically includes：
According to the out-phase combing signal that the coupling sample circuit is collected, the defeated of the Linc Power Amplifier Combining Circuits is adjusted
Enter signal, to cause that the input signal of first power amplifier and second power amplifier changes, to reach
Digital enhancement effect.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2013/086437 WO2015062081A1 (en) | 2013-11-01 | 2013-11-01 | Linc power amplifier combiner circuit |
Publications (2)
| Publication Number | Publication Date |
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| CN104272584A CN104272584A (en) | 2015-01-07 |
| CN104272584B true CN104272584B (en) | 2017-06-20 |
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| CN109687828B (en) * | 2019-02-28 | 2023-12-19 | 清华大学 | Radio frequency power amplifier and base station |
| CN110011623A (en) * | 2019-03-28 | 2019-07-12 | 杭州电子科技大学温州研究院有限公司 | A kind of incorgruous power amplifier of dual band radio frequency |
| CN113131963A (en) * | 2019-12-31 | 2021-07-16 | 深圳市大富科技股份有限公司 | Compensation circuit and communication circuit |
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|---|---|---|---|---|
| US6054896A (en) * | 1998-12-17 | 2000-04-25 | Datum Telegraphic Inc. | Controller and associated methods for a linc linear power amplifier |
| US6710650B1 (en) * | 2002-09-30 | 2004-03-23 | Nortel Networks Limited | Amplifier switching |
| CN1833358A (en) * | 2003-03-28 | 2006-09-13 | 安德鲁公司 | Doherty amplifier with output mixing coupler |
| CN101427460A (en) * | 2006-04-21 | 2009-05-06 | 艾利森电话股份有限公司 | Output networks in combination with LINC technique |
| CN101729079A (en) * | 2008-10-13 | 2010-06-09 | 电子科技大学 | LINC transmitter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6930547B2 (en) * | 2002-08-09 | 2005-08-16 | Andrew Corporation | Linearizing LINC amplifiers using pre-distortion |
| US7313416B1 (en) * | 2004-09-01 | 2007-12-25 | Rockwell Collins, Inc. | Scalable power amplifier |
| CN101651459B (en) * | 2009-09-15 | 2013-02-13 | 电子科技大学 | High-efficiency linear LINC transmitter |
-
2013
- 2013-11-01 CN CN201380004307.2A patent/CN104272584B/en active Active
- 2013-11-01 WO PCT/CN2013/086437 patent/WO2015062081A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6054896A (en) * | 1998-12-17 | 2000-04-25 | Datum Telegraphic Inc. | Controller and associated methods for a linc linear power amplifier |
| US6710650B1 (en) * | 2002-09-30 | 2004-03-23 | Nortel Networks Limited | Amplifier switching |
| CN1833358A (en) * | 2003-03-28 | 2006-09-13 | 安德鲁公司 | Doherty amplifier with output mixing coupler |
| CN101427460A (en) * | 2006-04-21 | 2009-05-06 | 艾利森电话股份有限公司 | Output networks in combination with LINC technique |
| CN101729079A (en) * | 2008-10-13 | 2010-06-09 | 电子科技大学 | LINC transmitter |
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| CN104272584A (en) | 2015-01-07 |
| WO2015062081A1 (en) | 2015-05-07 |
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