CN106357223A - Power amplifier circuit and load impedance modulating method thereof - Google Patents
Power amplifier circuit and load impedance modulating method thereof Download PDFInfo
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- CN106357223A CN106357223A CN201510424380.6A CN201510424380A CN106357223A CN 106357223 A CN106357223 A CN 106357223A CN 201510424380 A CN201510424380 A CN 201510424380A CN 106357223 A CN106357223 A CN 106357223A
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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
- H03F1/04—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers
- H03F1/06—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers to raise the efficiency of amplifying modulated radio frequency waves; to raise the efficiency of amplifiers acting also as modulators
- H03F1/07—Doherty-type amplifiers
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Abstract
The invention provides a power amplifier circuit and a load impedance modulating method thereof. The power amplifier circuit comprises a main power amplification circuit and an auxiliary power amplification circuit. The main power amplification circuit is used for amplifying power signals on a main circuit. The auxiliary power amplification circuit serves as an auxiliary circuit of the main power amplification circuit and is used for amplifying power signals on the auxiliary circuit. The main power amplification circuit and the auxiliary power amplification circuit are connected to a combination output point through an adjusting line arranged in the main power amplification circuit, the combination output point is a parallel connection intersection of the main power amplification circuit and the auxiliary power amplification circuit, and the adjusting line is used for matching load impedance for a main circuit power amplifier tube in the main power amplification circuit. According to the power amplifier circuit and the load impedance modulating method thereof, the technical problem that in the correlation technique, when broadband of a power amplifier circuit is considered, the debugging process of a TLLM power amplifier is difficult to simplify is solved, and then the technical effect that debugging of the TLLM power amplifier can be simplified while good broadband performance of an original framework is kept is achieved.
Description
Technical field
The present invention relates to amplifying circuit field, in particular to a kind of power amplifier and its load impedance modulator approach.
Background technology
At present, in order to improve the availability of frequency spectrum, communication system is all using linearity modulation technique.Due to power amplifier (with
It is referred to as down power amplifier) radiofrequency signal that processes is all to have the envelope variation signal of peak-to-average force ratio, in order to ensure radiofrequency signal
The linearity, power amplifier needs to be operated in rollback power rating.
At present, doherty is the high efficiency power amplifier design technology being widely adopted, its raising efficiency using be load resistance
Anti- modulation principle, i.e. high-power signal (hereinafter referred to as big signal) and during low-power level signal (hereinafter referred to as small-signal),
Load impedance is different.
As shown in figure 1, in traditional tllm doherty power amplifier, in order to realize load impedance modulation, main road work(
The outfan of rate amplifying circuit can include the first adjustment line 102 ', the outfan of bypass power amplification circuit can include
The outfan of two adjustment lines 104 ' and doherty power amplifier can include output λ/4 impedance transformation line 106 ', and totally 3
Section transmission line.Wherein, because output λ/4 impedance transformation line 106 ' has narrower frequency characteristic, limit doherty
The overall broadband of power amplifier.
In the related, there is provided no transmission line load modulation (transformer-less load-modulated, referred to as
Tllm) framework.As shown in Fig. 2 for the bandwidth lifting doherty power amplifier, in traditional tllm framework
In deleted first adjustment line 102 ' as shown in Figure 1, the second adjustment line 104 ' and output λ/4 impedance transformation line simultaneously
106’.But this tllm framework haves the shortcomings that realizability difference and debugging difficulty are high.
As seen from Figure 1, after two-way power amplifier pipe is respectively through modulating network, need at a point (i.e. combining output point)
It is combined, traditional doherty power amplifier is all the position that combining output point is positioned close to peak road (bypass)
Put, main road (main road) modulation circuit to be then connected to a point by the first adjustment line 102 '.
However, during due to actual design pcb, by device and match circuit size limitation, two-way power amplifier pipe is interval one
Set a distance is placed, as shown in Fig. 2 in the case of all not adjusting line on the two-way modulation circuit of tllm framework,
It is difficult to two-way modulation circuit is connected to a point (i.e. combining output point) simultaneously.And if connected by y type, need pay
Go out to increase the cost of arrangement space.Obviously, in miniature requirement higher and higher today, this layout is unfavorable for that product is real
Existing.Although, traditional tllm framework can also copy traditional doherty to retain the first adjustment line, now the first adjustment
The characteristic impedance of line will bring up to 2z0 (i.e. combining output point impedance can improve twice).With the symmetrical doherty of two-way it is
Example, the characteristic impedance of the first adjustment line will be changed into 100 ω, taking the ro4350 sheet material as 30mil for the dielectric thickness as a example,
Corresponding live width only has 0.34mm.Adjustment line live width attenuates and through-current capability can be led to reduce, and also implies that and can carry
Output ability reduces.And remove the first adjustment line in tradition tllm framework and also there is a problem of that the debugging of main road is difficult,
Because a modulation circuit will take into account the modulation of two kinds of impedance states simultaneously, need the number of times repeatedly modulated will be very in practice
Many.
In addition, the main road design process of traditional doherty power amplifier and debugging process are as follows:
First do high power load modulation during 0db rollback, as shown in Figure 1, first by the maximum power point of main road power tube
Corresponding load impedance zopt modulates 50 ω；Then come to rollback xdb point by the first adjustment line 102 ' again
The corresponding load impedance of low-power point is modulated, by adjusting the length of the first adjustment line 102 ', by main road power tube
Best efficiency point corresponding impedance zmod modulates 25 ω.The load impedance choosing corresponding a point during peak power is used as
The characteristic impedance of the first adjustment line 102 ' is it is ensured that will not be corrupted to the modulation condition of zopt in zmod modulated process.
In traditional tllm framework, if eliminating the output λ of the impact bandwidth with frequency characteristic as shown in Figure 1
/ 4 impedance transformation line 106 ', but still retain the first adjustment line 102 ', and follow traditional doherty main road mentality of designing,
Its modulated process is: first zopt is modulated to 100 ω, then by adjusting the first adjustment line that characteristic impedance is 100 ω
102 ' length is realizing the conversion of zmod to 50 ω.The characteristic impedance of the first adjustment line 102 ' improves, corresponding
It is that live width attenuates, it will the output ability of impact power amplifier.In order to evade this problem, select in traditional tllm
First is adjusted line 102 ', the second adjustment line 104 ' and output λ/4 impedance transformation line 106 ' are together removed, using according to
To complete the modulation of two kinds of impedance states of zopt and zmod by match circuit simultaneously, to lead to the difficult connection of two-way match circuit
To a point (i.e. combining output point), substantially do not possess realizability.
For above-mentioned problem, effective solution is not yet proposed at present.
Content of the invention
The invention provides a kind of power amplifier and its load impedance modulator approach, at least to solve taking into account in correlation technique
It is difficult to simplify the technical problem of the debugging process of tllm power amplifier during the broadband of power amplifier.
According to an aspect of the invention, it is provided a kind of power amplifier, comprising: main road power amplification circuit, it is used for putting
Power signal on big main circuit；Bypass power amplification circuit, as the auxiliary circuit of above-mentioned main road power amplification circuit,
For amplifying the power signal on auxiliary circuit, wherein, above-mentioned main road power amplification circuit is by being arranged on above-mentioned main road work(
Adjustment line in rate amplifying circuit, is connected to combining output point, above-mentioned combining output point with above-mentioned bypass power amplification circuit
For the joint in parallel of above-mentioned main road power amplification circuit and above-mentioned bypass power amplification circuit, above-mentioned adjustment line be used for for
State the main road power tube matched load impedance in main road power amplification circuit.
Further, above-mentioned main road power amplification circuit includes: above-mentioned main road power tube, main road match circuit and above-mentioned tune
Whole line, wherein, the outfan of above-mentioned main road power tube connects to the input of above-mentioned main road match circuit, above-mentioned main road
The outfan on distribution road connects to the input of above-mentioned adjustment line, and the outfan of above-mentioned adjustment line connects to above-mentioned combining output
Point；Above-mentioned bypass power amplification circuit includes: bypass power tube and bypass match circuit, the output of above-mentioned bypass power tube
End connects to above-mentioned bypass match circuit input, and above-mentioned bypass match circuit outfan connects to above-mentioned combining output point.
Further, above-mentioned bypass power amplification circuit also includes: input k λ impedance transformation line, connects to above-mentioned bypass
The input of power tube, for for the above-mentioned bypass power tube matched load impedance in above-mentioned bypass power amplification circuit.
Further, above-mentioned bypass power amplification circuit is one or more of.
Further, above-mentioned adjustment line is microstrip transmission line.
Further, above-mentioned microstrip transmission line includes: co-planar waveguide and staged microstrip transmission line.
Further, the impedance of above-mentioned combining output point is 50 ω.
Further, the characteristic impedance of above-mentioned adjustment line is 50 ω.
Further, above-mentioned power amplifier also includes: power divider, is respectively connecting to above-mentioned master by branch input point
Road power amplification circuit and above-mentioned bypass power amplification circuit, for for above-mentioned main road power amplification circuit and above-mentioned bypass work(
Rate amplifying circuit distributes corresponding power signal.
According to a further aspect in the invention, there is provided the load impedance modulator approach of a kind of power amplifier, comprising: to arbitrary
The rollback power points of the main road power amplification circuit in the above-mentioned power amplifier of item and bypass power amplification circuit is corresponding negative
Carry impedance to be modulated；High-power to the main road power amplification circuit in above-mentioned power amplifier and bypass power amplification circuit
The corresponding load impedance of point is modulated.
Further, above-mentioned power amplifier includes: tllm doherty power amplifier.
By the present invention, using main road power amplification circuit, for amplifying the power signal on main circuit；Bypass power is put
Big circuit, as the auxiliary circuit of main road power amplification circuit, for amplifying the power signal on auxiliary circuit, wherein,
Main road power amplification circuit, by the adjustment line being arranged in main road power amplification circuit, is connected with bypass power amplification circuit
In combining output point, combining output point is the joint in parallel of main road power amplification circuit and bypass power amplification circuit, adjusts
Whole line is used for as the main road power tube matched load impedance in main road power amplification circuit, solves in correlation technique and is taking into account
It is difficult to simplify the technical problem of the debugging process of tllm power amplifier during the broadband of power amplifier, and then reach former in holding
While having framework broadband performance good, the technique effect of the debugging of tllm power amplifier can also be simplified.
Brief description
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, the present invention
Schematic description and description be used for explaining the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is a kind of circuit diagram of the power amplifier according to correlation technique；
Fig. 2 is the circuit diagram of another kind of power amplifier according to correlation technique；
Fig. 3 is the circuit diagram of power amplifier according to embodiments of the present invention；And
Fig. 4 is the flow chart of the load impedance modulator approach of power amplifier according to embodiments of the present invention.
Specific embodiment
To describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that in the feelings do not conflicted
Under condition, the embodiment in the application and the feature in embodiment can be mutually combined.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, " second "
Etc. being for distinguishing similar object, without for describing specific order or precedence.
Embodiment 1
Provide a kind of power amplifier in the present embodiment.
Fig. 3 is the circuit diagram of power amplifier according to embodiments of the present invention, as shown in figure 3, this circuit includes: main road work(
Rate amplifying circuit 10, for amplifying the power signal on main circuit；Bypass power amplification circuit 20, as main road power
The auxiliary circuit of amplifying circuit 10, for amplifying the power signal on auxiliary circuit, wherein, main road power amplification circuit
10, by the adjustment line 102 being arranged in main road power amplification circuit 10, are connected to conjunction with bypass power amplification circuit 20
Road output point a, combining output point a cross for the parallel connection of main road power amplification circuit 10 and bypass power amplification circuit 20
Point, adjustment line 102 is used for as the main road power tube 104 matched load impedance in main road power amplification circuit 10.
Wherein, during practical application, when the power signal of input is small-signal, bypass power amplification circuit 20 is in out
Line state, main road power amplification circuit 10 works independently；When the power signal of input is big signal, bypass power is put
Big circuit 20 is in channel status, and main road power amplification circuit 10 and bypass power amplification circuit 20 work simultaneously.For
During main road power tube 104 matched load impedance in main road power amplification circuit 10, need the biography of adjustment adjustment line 102
Defeated line length.
Because the present invention is only provided with adjustment line 102 in main road power amplification circuit 10, and eliminate bypass power and put
Corresponding adjustment line in big circuit 20, and output λ/4 with frequency characteristic after eliminating combining output point a
Impedance transformation line, therefore, not only eliminates the impact of their bandwidth to amplifying circuit, and simplifies the tune of power amplifier
Examination flow process, has reached the technique effect of high realizability.
Wherein, compared with traditional doherty power amplifier as shown in Figure 2, present invention can ensure that bandwidth is not subject to shadow
That rings it is critical only that no output λ/4 impedance transformation line, is not affected by frequency characteristic, inherits in tllm framework and remove output
The advantage to widen coupling bandwidth for the λ/4 impedance transformation line；And the characteristic impedance adjusting line 102 still maintains 50 ω,
This as the characteristic impedance in traditional doherty power amplifier, therefore, the output energy of power amplifier in the present invention
Power is identical with the output ability of traditional doherty power amplifier；And, compared with traditional tllm power amplifier,
How the key that the present invention has high realizability has been that one section of adjustment line 102, specifically, due to the adjustment line adding
102, the main (i.e. main road power amplification circuit 10) in power amplifier of the present invention and peak (i.e. bypass power amplification electricity
Road 20) two-way can be easy to be bound on combining output point, therefore, have high realizability.
By the present invention, using main road power amplification circuit, for amplifying the power signal on main circuit；Bypass power is put
Big circuit, as the auxiliary circuit of main road power amplification circuit, for amplifying the power signal on auxiliary circuit, wherein,
Main road power amplification circuit, by the adjustment line being arranged in main road power amplification circuit, is connected with bypass power amplification circuit
In combining output point, combining output point is the joint in parallel of main road power amplification circuit and bypass power amplification circuit, adjusts
Whole line is used for as the main road power tube matched load impedance in main road power amplification circuit, solves in correlation technique and is taking into account
It is difficult to simplify the technical problem of the debugging process of tllm power amplifier during the broadband of power amplifier, and then reach former in holding
While having framework broadband performance good, the technique effect of the debugging of tllm power amplifier can also be simplified.
Alternatively, as shown in figure 3, above-mentioned main road power amplification circuit 10 may include that main road power tube 104, main road
Match circuit 106 and adjustment line 102, wherein, the outfan of main road power tube 104 connects to main road match circuit 106
Input, the outfan of main road match circuit 106 connects to the input of adjustment line 102, the output of adjustment line 102
End connects to combining output point a；Above-mentioned bypass power amplification circuit 20 may include that bypass power tube 204 and bypass
Match circuit 206, the outfan of bypass power tube 204 connects to bypass match circuit 206 input, bypass coupling electricity
Road 206 outfan connects to combining output point a.
Alternatively, as shown in figure 3, above-mentioned bypass power amplification circuit 20 can also include: input k λ impedance transformation line
202, connect to the input of bypass power tube 204, for for the bypass power tube 204 in bypass power amplification circuit 20
Matched load impedance.Wherein, k is the proportionality coefficient of λ wavelength, and such as its value can be 1/4.Input k λ impedance transformation line
202 can be used for, when inputting small-signal, turning off bypass power amplification circuit 20.In addition, input k λ impedance transformation line
202 can be also used for making the phase place of bypass power amplification circuit 20 and main road power amplification circuit 10 to it.
Alternatively, bypass power amplification circuit can be one or more of.In other words, the present invention does not limit to and applies two
In the circuit of road, can be applicable in the power amplifier framework of more than various two-way or two-way.Alternatively, above-mentioned adjustment line is permissible
For microstrip transmission line.Still optionally further, microstrip transmission line includes: co-planar waveguide and staged microstrip transmission line.Optional
Ground, as shown in figure 3, the impedance of combining output point is 50 ω.Alternatively, as shown in figure 3, adjusting the characteristic impedance of line
For 50 ω.Its adjustable extent is typically between 25 ω～50 ω.This power amplifier is suitable to wide bandwidth applications, can widely answer
For in various doherty power amplifiers.
Alternatively, as shown in figure 3, above-mentioned power amplifier can also include: power divider 30, by branch input point
It is respectively connecting to main road power amplification circuit 10 and bypass power amplification circuit 20, for for main road power amplification circuit 10
Distribute corresponding power signal with bypass power amplification circuit 20.In symmetrical power amplifier, main and auxiliary road can be uniform
Distribution power signal；In asymmetric power amplifier, main and auxiliary road can be according to special ratios distribution power signal.
The implementation of the embodiment of the present invention is simple, not only solves power amplifier, the power amplifier electricity of such as traditional tllm framework
The problem of road realizability difference.
Embodiment 2
According to a further aspect in the invention, there is provided a kind of load impedance modulator approach of power amplifier.
Fig. 4 is the flow chart of the load impedance modulator approach of power amplifier according to embodiments of the present invention, as shown in figure 4,
The method comprises the following steps:
Step s402, is carried out to the corresponding load impedance of rollback power points of the main road power amplification circuit in power amplifier
Modulation.It is possible to further to the main road power amplification in the power amplifier described in any one of embodiment 1 embodiment
The corresponding load impedance of rollback power points of circuit and bypass power amplification circuit is modulated.
Step s404 is right to the high-power point of the main road power amplification circuit in power amplifier and bypass power amplification circuit
The load impedance answered is modulated.
The load impedance modulation step of the present embodiment during enforcement, can be executed using backout method, that is, first carry out step
S402, then execution step s404.
Alternatively, above-mentioned power amplifier includes: symmetrically or non-symmetrically tllm doherty power amplifier framework.Wherein,
The characteristic impedance of the adjustment line in power amplifier can be 50 ω.
Below in conjunction with Fig. 3, and the embodiment of the present invention is elaborated by specific embodiment:
With traditional doherty power amplifier when carrying out load impedance modulation, first mate high-power point (@0db) load resistance
The matching order that anti-zopt mates rollback power points (@xdb) load impedance zmod again is compared, and inventive embodiments adopt
Backward coupling, i.e. first mate rollback power points load impedance zmod, then mate high-power load impedance zopt.
Wherein, the load impedance modulated process of traditional doherty power amplifier is schematically as follows:
Wherein, the load impedance modulated process of the power amplifier () of the present invention is illustrated such as taking doherty power amplifier as a example
Under:
That is, the backward coupling of the embodiment of the present invention: first carry out rollback power points impedance matching, by the output of power amplifier
Distribution road is realizing the impedance matching of zmod to 50 ω；Complete peak power by adjusting the line length of adjustment line 102 again
Point impedance mates to realize the impedance matching of zopt to 100 ω.The load resistance of the rollback power points at output combining point a
Resist for 50 ω, the characteristic impedance of therefore adjustment line ensures that 50 ω.
Closely bound up with the impedance matching condition of rollback power points, the traditional zmod of the efficiency index of doherty power amplifier
Impedance matching, due to needing to realize by adjusting the change of line length, needs to experience high impedance conversion ratio (as in (2)
Shown), therefore limit efficiency bandwidth.And zmod impedance matching is directly to match 50 ω in the embodiment of the present invention
(as shown in (3)), impedance transformation ratio substantially reduces, and is conducive to reaching high efficient design target.
In addition, realize zmod and zopt impedance matching step by step, and later step does not affect the coupling of previous step
Journey, enormously simplify debugging process.Compared with the debugging process of traditional doherty power amplifier, the present invention not only ensures
Identical power output capacity, improves bandwidth, and is conducive to lifting whole efficiency.
Present invention can apply in more than various two-way or two-way doherty power amplifier framework symmetrically or non-symmetrically,
As a example two-way doherty power amplifier framework shown in by Fig. 3 for the here, describe embodiment of the present invention in detail as follows:
S2, determines the impedance reconnaissance of zopt and zmod.It is non-right to be determined according to the papr papr of signal
Title ratio, according to the relative standing-wave ratio of asymmetric two impedances of ratio-dependent, finally determines zopt on waiting standing-wave ratio circle
Value with zmod.
S4, realizes the impedance matching of zmod to 50 ω by match circuit.Using smith circle diagram or ads etc.
Zmod impedance is transformed to 50 ω by staged microstrip transmission line and shunt capacitance combination by emulation tool.
S6, realizes the impedance matching of zopt.The characteristic impedance of adjustment line 102 is 50 ω, changes adjustment line 102
Length, can make zopt impedance transform on the target impedance of needs, 100 ω in such as symmetrical doherty.
S8, finally completes the design carrying out remaining circuit.Remaining circuit is similar with traditional doherty method for designing, here
Repeat no more.
The implementation of the present invention is simple, not only solves the problems, such as that traditional tllm framework realizability is poor, main road
The backward coupling of impedance matching makes rollback power points coupling bandwidth be widened on the contrary, is more beneficial for doherty whole efficiency
Lifting.
In addition, the present invention inherits removes output λ/4 impedance transformation line in tllm framework to widen the advantage of coupling bandwidth,
By the backout using rollback power points and high-power point impedance coupling so that characteristic impedance is the adjustment line of 50 ω
102 are added, and while the beneficial effect brought is to maintain traditional tllm broadband character, possesses and can apply completely
Realizability in side circuit.While realizing zmod impedance matching, significantly reducing of impedance transformation ratio, help
In the efficiency lifting doherty power amplifier further.
Through the above description of the embodiments, those skilled in the art can be understood that according to above-described embodiment
Method can realize by the mode of software plus necessary general hardware platform naturally it is also possible to pass through hardware, but a lot
In the case of the former is more preferably embodiment.Based on such understanding, technical scheme is substantially in other words to existing
Have what technology contributed partly can embody in the form of software product, this computer software product is stored in one
In storage medium (as rom/ram, magnetic disc, CD), including some instructions with so that a station terminal equipment (can
To be mobile phone, computer, server, or the network equipment etc.) method described in execution each embodiment of the present invention.
Embodiments of the invention additionally provide a kind of storage medium.Alternatively, in the present embodiment, above-mentioned storage medium can
To be arranged to store for executing the program code of following steps:
S10, is modulated to the corresponding load impedance of rollback power points of the main road power amplification circuit in power amplifier；
S12, corresponding negative to the high-power point of the main road power amplification circuit in power amplifier and bypass power amplification circuit
Carry impedance to be modulated.
Alternatively, in the present embodiment, above-mentioned storage medium can include but is not limited to: u disk, read only memory (rom,
Read-only memory), random access memory (ram, random access memory), portable hard drive,
Magnetic disc or CD etc. are various can be with the medium of store program codes.
Alternatively, the specific example in the present embodiment may be referred to showing described in above-described embodiment and optional embodiment
Example, the present embodiment will not be described here.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the technology of this area
For personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any
Modification, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (11)
1. a kind of power amplifier is it is characterised in that include:
Main road power amplification circuit, for amplifying the power signal on main circuit；
Bypass power amplification circuit, as the auxiliary circuit of described main road power amplification circuit, for amplifying auxiliary electricity
Power signal on road,
Wherein, described main road power amplification circuit is by being arranged on the adjustment line in described main road power amplification circuit,
It is connected to combining output point with described bypass power amplification circuit, described combining output point is described main road power amplification
Circuit and the joint in parallel of described bypass power amplification circuit, described adjustment line is used for as described main road power amplification
Main road power tube matched load impedance in circuit.
2. circuit according to claim 1 it is characterised in that
Described main road power amplification circuit includes: described main road power tube, main road match circuit and described adjustment line,
Wherein, the outfan of described main road power tube connects to the input of described main road match circuit, described main road coupling
The outfan of circuit connects to the input of described adjustment line, and the outfan of described adjustment line connects defeated to described combining
Go out a little；
Described bypass power amplification circuit includes: bypass power tube and bypass match circuit, described bypass power tube
Outfan connects to described bypass match circuit input, and described bypass match circuit outfan connects to described combining
Output point.
3. circuit according to claim 2 is it is characterised in that described bypass power amplification circuit also includes: input k
λ impedance transformation line, connects to the input of described bypass power tube, for in described bypass power amplification circuit
Described bypass power tube matched load impedance.
4. circuit according to claim 2 is it is characterised in that described bypass power amplification circuit is one or more of.
5. circuit according to claim 2 is it is characterised in that described adjustment line is microstrip transmission line.
6. circuit according to claim 5 is it is characterised in that described microstrip transmission line includes: co-planar waveguide and ladder
Formula microstrip transmission line.
7. circuit according to claim 1 is it is characterised in that the impedance of described combining output point is 50 ω.
8. circuit according to claim 1 is it is characterised in that the characteristic impedance of described adjustment line is 50 ω.
9. circuit according to claim 1 is it is characterised in that described power amplifier also includes: power divider, leads to
Cross branch input point and be respectively connecting to described main road power amplification circuit and described bypass power amplification circuit, for for
Described main road power amplification circuit and described bypass power amplification circuit distribute corresponding power signal.
10. a kind of load impedance modulator approach of power amplifier is it is characterised in that include:
To the main road power amplification circuit in the power amplifier any one of claim 1 to 9 and bypass power
The corresponding load impedance of rollback power points of amplifying circuit is modulated；
Corresponding with the high-power point of bypass power amplification circuit to the main road power amplification circuit in described power amplifier
Load impedance be modulated.
11. methods according to claim 10 are it is characterised in that described power amplifier includes: tllm doherty work(
Electric discharge road.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510424380.6A CN106357223A (en) | 2015-07-17 | 2015-07-17 | Power amplifier circuit and load impedance modulating method thereof |
| PCT/CN2016/078974 WO2016180130A1 (en) | 2015-07-17 | 2016-04-11 | Power amplifier circuit and method for modulating load impedance thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510424380.6A CN106357223A (en) | 2015-07-17 | 2015-07-17 | Power amplifier circuit and load impedance modulating method thereof |
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| CN106357223A true CN106357223A (en) | 2017-01-25 |
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| CN108336975A (en) * | 2018-01-05 | 2018-07-27 | 中兴通讯股份有限公司 | Out-phase power amplifier and its realization export matched method and apparatus, power amplifier branch |
| WO2021051232A1 (en) * | 2019-09-16 | 2021-03-25 | 华为技术有限公司 | Power amplifier circuit, transmitter and network device |
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| CN115441843A (en) * | 2021-06-02 | 2022-12-06 | 中兴通讯股份有限公司 | Power amplifier, signal processing method, transmitter and base station device |
| CN116090385B (en) * | 2023-03-31 | 2023-06-16 | 南京米乐为微电子科技有限公司 | Matching network design method and device |
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| EP2608400B1 (en) * | 2011-12-20 | 2014-08-13 | Nxp B.V. | N way Doherty amplifier |
| CN104393843A (en) * | 2014-12-19 | 2015-03-04 | 夏景 | Doherty power amplifier adopting multistage auxiliary circuit amplifier |
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- 2015-07-17 CN CN201510424380.6A patent/CN106357223A/en not_active Withdrawn
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| CN1400742A (en) * | 2001-06-08 | 2003-03-05 | Trw公司 | Microwave power amplifier |
| KR20110035431A (en) * | 2009-09-30 | 2011-04-06 | 주식회사 피플웍스 | Power amplifier mixing bias |
| CN104604125A (en) * | 2012-06-21 | 2015-05-06 | 爱立信（中国）通信有限公司(中国) | Doherty amplifier |
| WO2015029462A1 (en) * | 2013-08-28 | 2015-03-05 | 株式会社東芝 | Power amplification device and control method for power amplification device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336975A (en) * | 2018-01-05 | 2018-07-27 | 中兴通讯股份有限公司 | Out-phase power amplifier and its realization export matched method and apparatus, power amplifier branch |
| CN108336975B (en) * | 2018-01-05 | 2022-02-22 | 中兴通讯股份有限公司 | Out-of-phase power amplifier, method and device for realizing output matching of out-of-phase power amplifier and power amplifier branch |
| WO2021051232A1 (en) * | 2019-09-16 | 2021-03-25 | 华为技术有限公司 | Power amplifier circuit, transmitter and network device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016180130A1 (en) | 2016-11-17 |
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