CN107332519A - A kind of broadband Doherty power amplifier and its implementation that combiner is exported based on modified - Google Patents
A kind of broadband Doherty power amplifier and its implementation that combiner is exported based on modified Download PDFInfo
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- CN107332519A CN107332519A CN201710550390.3A CN201710550390A CN107332519A CN 107332519 A CN107332519 A CN 107332519A CN 201710550390 A CN201710550390 A CN 201710550390A CN 107332519 A CN107332519 A CN 107332519A
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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
- H03F1/0288—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers
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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
- H03F1/42—Modifications of amplifiers to extend the bandwidth
- H03F1/48—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers
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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
- H03F1/56—Modifications of input or output impedances, not otherwise provided for
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- 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
- H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
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- 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
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/211—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/36—Indexing scheme relating to amplifiers the amplifier comprising means for increasing the bandwidth
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- H—ELECTRICITY
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- H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
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Abstract
The present invention provides a kind of broadband Doherty power amplifier and its implementation that combiner is exported based on modified, using novel load modulating network, including the first impedance modified line T1, the second impedance modified line T2 and the 3rd impedance modified line T3, first impedance modified line T1 is 50 Europe quarter-wave impedance modified lines, second impedance modified line T2 is 35 Europe quarter-wave impedance modified lines, and the 3rd impedance modified line T3 is the wavelength impedance modified line of 50 Europe 1/2nd；The first impedance modified line T1 of output termination of carrier power amplifying circuit one end, the first impedance modified line T1 other end is connected with the output end of peak power amplifying circuit and exported power combiner to load by the second impedance modified line T2 again, the 3rd impedance modified line T3 of parallel connection at combining point.Relative to prior art, the present invention reduces the phenomenon that load impedance drifts about with frequency shift (FS), effectively raises the bandwidth of Doherty power amplifier by the parallel connection wavelength transmission line T3 of 50 Europe 1/2nd at combining.
Description
Technical field
The present invention relates to radio-frequency communication technical field, more particularly to a kind of broadband that combiner is exported based on modified
Doherty power amplifier and its implementation.
Background technology
With the fast development of Modern Communication System, it is proposed that many new communication standards, spectrum efficiency is improved, peak-to-average force ratio
(PAPR) improve.In recent years, these new communication standards are disposed and run on a wide frequency band.In light of this situation, communicate
Power amplifier (PA) in base station is estimated will to handle wide bandwidth (BW) and high peak-to-average power ratio (PAPR) simultaneously, with improve flexibility with
Performance.Therefore, how to design can take into account high linearity and efficient radio-frequency power amplifier turn into limit its industry should
One of key issue.Doherty power amplifier is because can high efficiency amplifier modulated signal and cost is relatively low and turn into current
Radio communication uses the dominant form of power amplifier.Traditional two-way Doherty power amplifier Doherty power is put
The technology of big device most critical is exactly active load traction technique.Two transistors are considered as two desired electricals in its topological structure
Stream source, according to Kirchhoff's law, can change another road impedance value of circuit by changing the current value of current source all the way, from
And realize the modulation effect to load impedance.This causes Doherty power amplifier can be with the size dynamic of foundation input voltage
The size of output end impedance value is modulated, so that Doherty power amplifier can reach saturation state in advance, rollback is improved
The efficiency of point.
But with the fast development of the communication technology, frequency resource also seems further deficient, and multiple work frequencies can be covered simultaneously
The wide-band communication system of section and compatible various protocols standard has become the development priority of wireless technology.Accordingly, broadband
Doherty amplifiers have become the study hotspot of academic and industrial quarters in recent years.
The factor of bandwidth is limited in Doherty power amplifier structure to be had a lot, and such as power splitter, compensating line, load are adjusted
The effect of all restricted bandwidth such as network processed.In the prior art, generally use following to improve the bandwidth of Doherty amplifiers
Method：(1) with the Europe of net mate structure substitution combining end 35, quarter-wave transmission line.By reducing the end resistance of transmission line two
Anti- conversion ratio increases bandwidth.It will be apparent that circuit structure is greatly increased using net mate structure, meanwhile, its impedance transformation ratio is not
It can significantly improve, bandwidth increase is limited.(2) tried one's best using double impedance matching methods and shorten major-minor power amplifier reference-junction compensation line length
Degree.By shortening the length of compensating line, reduce influence of the compensating line to frequency shift (FS) to expand bandwidth.But, double impedance matchings
Method amount of calculation is very big, and the effect for actually improving bandwidth is unsatisfactory, especially with the increase of bandwidth, frequently can lead to
There is entire gain reduction, the problems such as efficiency declines in Doherty power amplifier.
Therefore, the present invention proposes a kind of new bear for drawbacks described above present in Doherty power amplifier at this stage
Modulated structure is carried, for realizing to Doherty power amplifier bandwidth broadning.
The content of the invention
In view of this, it is an object of the invention to provide a kind of broadband Doherty work(that combiner is exported based on modified
Rate amplifier and its implementation, by improving the load modulation network of traditional Doherty power amplifier, reduce load impedance
Offset with caused by incoming frequency change, improve the bandwidth of Doherty power amplifier.
In order to overcome the defect of prior art, the present invention uses following technical scheme：
It is a kind of based on modified export combiner broadband Doherty power amplifier, its topological structure mainly include etc.
Divide power splitter, carrier power amplifying circuit, peak power amplifying circuit and novel load modulating network；Wherein, decile work(point
Device is used to by input power export respectively after decile to amplify electricity to the carrier power amplifying circuit and the peak power
Road, the novel load modulating network includes the first impedance modified line T1, the second impedance modified line T2 and the 3rd impedance modified line T3, described
First impedance modified line T1 is 50 Europe quarter-wave impedance modified lines, and the second impedance modified line T2 is 35 Europe quarter-waves
Long impedance modified line, the 3rd impedance modified line T3 is the wavelength impedance modified line of 50 Europe 1/2nd；The carrier power amplifying circuit
Output termination the first impedance modified line T1 one end, the other end of the first impedance modified line T1 puts with the peak power
The output end of big circuit is connected and exports power combiner to load by the second impedance modified line T2 again, at combining point
The 3rd impedance modified line T3 in parallel；
The carrier power amplifying circuit includes the carrier wave input matching circuit, Carrier Power Amplifier, load being sequentially connected in series
Ripple output matching circuit and carrier power amplifier reference-junction compensation line；The peak power amplifying circuit includes 50 Ou Si being sequentially connected in series
/ mono- wavelength phases delay line, peak value input matching circuit, peak power amplifier, peak value output matching circuit, its peak work
Put reference-junction compensation line；The Carrier Power Amplifier is AB power-like amplifiers, and the peak power amplifier is C class power
Amplifier.
Preferably, output impedance of the Carrier Power Amplifier when low-power is inputted is 100 Europe, and in high input work
Load impedance is 50 Europe during rate.
Preferably, output impedance of the peak power amplifier when low-power is inputted is infinity, and in height input
Load impedance is 50 Europe during power.
Preferably, the Carrier Power Amplifier and the peak power amplifier are realized using transistor.
The invention also discloses a kind of realization side for the broadband Doherty power amplifier that combiner is exported based on modified
Method, comprises the following steps：
The AB power-like amplifiers of a standard are debugged, as Carrier Power Amplifier, while adjusting reference-junction compensation line
Length causes output impedance of the Carrier Power Amplifier when low-power is inputted to be 100 Europe, and Carrier Power Amplifier is defeated in height
Load impedance is 50 Europe when entering power；
The C power-like amplifiers of a standard are debugged, as peak power amplifier, while adjusting peak power amplifier
The compensation line length of output end so that output impedance of the peak power amplifier when low-power is inputted is infinity so that peak
It is 50 Europe to be worth power amplifier load impedance in high input power；
Novel load modulating network is designed, the novel load modulating network includes the first impedance modified line T1, the second impedance
Modified line T2 and the 3rd impedance modified line T3, the first impedance modified line T1 is 50 Europe quarter-wave impedance modified lines, described second
Impedance modified line T2 is 35 Europe quarter-wave impedance modified lines, and the 3rd impedance modified line T3 is the wavelength impedance of 50 Europe 1/2nd
Modified line；Output termination the first impedance modified line T1 of carrier power amplifying circuit one end, the first impedance modified line
The T1 other end is connected with the output end of the peak power amplifying circuit and power combiner is passed through into second impedance again
Modified line T2 is exported to load, the 3rd impedance modified line T3 in parallel at combining point；
The carrier power amplifier debugged, peak value power amplifier, power splitter and novel load modulating network are combined composition bandwidth
Doherty power amplifier.
Relative to prior art, the present invention passes through the load modulation network of the traditional Doherty power amplifier of improvement, increase
The load impedance of main power amplifier under low input power state, improves the high efficiency back-off scope of Doherty power amplifiers.
Brief description of the drawings
Fig. 1 tradition Doherty power amplifier load modulation network schematic diagrames.
Doherty power amplifier novel load modulating network schematic diagram in Fig. 2 present invention.
Fig. 3 is that a kind of structure for the broadband Doherty power amplifier that combiner is exported based on modified is shown in the present invention
It is intended to.
Fig. 4 (a) high powers input major-minor power amplifier output end impedance real part deflection graph.
Fig. 4 (b) high powers input major-minor power amplifier output end imaginary impedance deflection graph.
Fig. 4 (c) low-power inputs main power amplifier output end resistance shift figure.
Embodiment
The following is specific embodiment of the invention and with reference to accompanying drawing, technical scheme is further described,
But the present invention is not limited to these embodiments.
The defect existed for existing Doherty power amplifier technology, applicant is to Doherty work(in the prior art
The structure of rate amplifier is conducted in-depth research, it is found by the applicant that during traditional Doherty power amplifier work, only when defeated
When entering signal and reaching " critical " state, peak amplifier is just started working.With the increase of input power, carrier amplifier
" effective " load impedance shifts to Z opt by 2Z opt gradual changes, and " effective " load impedance of peak amplifier then has ∞ gradual changes to Z
Opt (Z opt are the optimal impedance value of transistor).But load modulation network design is designed based on single frequency, if
Timing only considers the input-output characteristic of single frequency, therefore when the off-center frequency of working frequency, corresponding modulation impedance is also
Optimal value can be offset, the decay of amplifier performance is caused, it is suppressed that the bandwidth of amplifier, has been difficult to meet current radio communication
The requirement of system.
Referring to Fig. 1, traditional Doherty load modulation network structural representation is shown.For traditional Doherty
The working condition of power amplifier can be divided into three regions：Low-power, middle power and high power.When low-power input state
When, only carrier power amplifier is in work, and peak value power amplifier output is in high-impedance state.As input signal increases, only work as input
When signal reaches the cut-in voltage of peak value power amplifier, peak value power amplifier is just begun to turn on.And put with the increase carrier wave of input signal
" effective " load impedance of big device shifts to Z opt by 2Z opt gradual changes, and " effective " load impedance of peak amplifier then has ∞
Gradual change is to Z opt (Z opt be the optimal impedance value of transistor).But output matching network design is set based on single frequency
Meter, the input-output characteristic of single frequency need to be only considered during design, therefore when the off-center frequency of working frequency, it is corresponding to adjust
Impedance processed can also offset optimal value, cause the decay of amplifier performance, it is suppressed that the bandwidth of amplifier.
Based on classical transmission line theory, it can calculate and obtain load impedance and normalized frequencyPass
System.For traditional load modulation network, impedance of the carrier amplifier at back-off point, ZCL can be by equation below meter
Calculate：
As can be seen from the above equation, when power amplifier incoming frequency off-center frequency, ZCL real parts can be produced with the change of frequency
Skew, diminishes gradually, and this will produce strong influence to amplifier whole efficiency.Inhibit amplifier bandwidth.
As the above analysis, in load modulation network, if it is possible to suppress drift of the load impedance with frequency, also can
Enough improve the bandwidth of Doherty amplifiers.
Referring to Fig. 2, novel load modulating network structural representation proposed by the present invention is shown, by being closed in major-minor power amplifier
Terminal parallel connection microstrip line, can suppress to main power amplifier output end because frequency shift (FS) produces complex impedance, so as to limit main power amplifier
Export the drift phenomenon of terminal impedance.
As shown in Figure 2, novel load modulating network structure is by main one section of 50 Europe of power amplifier output end, quarter-wave impedance
50 Europe in parallel at transformation line T1, combining point, 1/2nd wavelength transmission line T3, and combining end 35 Europe of series connection, quarter-wave
Long impedance modified line T2 is constituted.
Load impedance Z CL1 are during amplifier small-power in similar Such analysis, Fig. 2：
If Λ=ZLZT, Δ=ZL+ZT, Ω=Λ Δs,
Then ZCL real part can be expressed as：
ZCL1 real parts similar with ZCL can also be expressed as:
Make Re [ZCL1]=Re [ZCL] ξ, then
I.e.:
Know ZL=35 Europe, ZT1=ZT=50 Europe by above-mentioned, be able to can be drawn according to above formula, when frequency input signal is inclined
During from central value, ξ>1.In other words, novel load modulating network proposed by the present invention can effectively suppress load impedance with defeated
Enter signal frequency shift and shift phenomenon.
In order to solve the defect of above-mentioned traditional Doherty, the application uses above-mentioned novel load modulating network
Realize broadband Doherty power amplifier.
Referring to Fig. 3, a kind of broadband Doherty power amplifier that combiner is exported based on modified of the present invention is shown
Structured flowchart, its topological structure mainly includes decile power splitter, carrier power amplifying circuit, peak power amplifying circuit, compensation
Line and novel load modulating network, wherein, decile power splitter is used to by input power export respectively after decile to give carrier wave work(
Rate amplifying circuit and peak power amplifying circuit, the Europe quarter-wave impedance of output termination 50 of carrier power amplifying circuit become
Line T1, and be connected with the output end of peak power amplifying circuit by power combiner again by 35 Europe quarter-wave impedances changes
Line T2 is exported to load.The parallel connection wavelength transmission line T3 of 50 Europe 1/2nd at combining point.
Due to the parallel connection wavelength transmission line T3 of 50 Europe 1/2nd at combining point, load impedance is reduced with frequency shift (FS)
The phenomenon of drift, effectively raises the bandwidth of Doherty power amplifier.
The carrier power amplifying circuit includes the carrier wave input matching circuit, Carrier Power Amplifier, load being sequentially connected in series
Ripple output matching circuit, carrier power amplifier reference-junction compensation line；The peak power amplifying circuit includes 50 Ou Si being sequentially connected in series
/ mono- wavelength phases delay line, peak value input matching circuit, peak power amplifier, peak value output matching circuit, its peak work
Put reference-junction compensation line；The novel load modulating network is by one section of 50 Europe quarter-wave impedance transformation line T1, combining point
Locate the wavelength transmission line T3 of 50 Europe 1/2nd in parallel, and combining end 35 Europe quarter-wave impedance modified line T2 of series connection are constituted；
The Carrier Power Amplifier is AB power-like amplifiers, and the peak power amplifier is C power-like amplifiers；The peak value
Power amplifier load impedance is 50 Europe.
In a preferred embodiment, described Carrier Power Amplifier and peak power amplifier combining point in parallel 50
The wavelength transmission line T3 of Europe 1/2nd.
In a preferred embodiment, the Carrier Power Amplifier and the peak power amplifier use crystal
Pipe is realized.
The specific design process that the present invention exports the broadband Doherty power amplifier of combiner based on modified is as follows：
A kind of broadband Doherty power amplifier that combiner is exported based on modified of the present invention, it is real as follows
It is existing：
Step one：Suitable transistor is chosen according to design requirement, its offset parameter and stability is determined.
Step 2：The AB power-like amplifiers of a standard are debugged, as Carrier Power Amplifier, while adjusting output end
Compensating line length causes output impedance of the carrier amplifier when low-power is inputted to be 100 Europe, and carrier power amplifier is in high input work
Load impedance is 50 Europe during rate；
Step 3：The C power-like amplifiers of a standard are debugged, peak power amplifier is used as.Its peak work is adjusted simultaneously
The compensation line length of rate amplifier output end so that output impedance of the peak amplifier when low-power is inputted is infinity, is made
It is 50 Europe to obtain load impedance when its peak work is placed on high input power；
Step 4：Design novel load modulating network as shown in Figure 2；
Step 5：The carrier power amplifier debugged, peak value power amplifier, power splitter and novel load modulating network are combined structure
Into a kind of Doherty power amplifier for improving work(bandwidth.
Compared with the prior art, the present invention uses a kind of novel load modulating network, reduces load impedance with frequency shift (FS)
And the phenomenon drifted about, effectively raise the bandwidth of Doherty power amplifier.
Fig. 4 (a), 4 (b), 4 (c) are, according to two kinds of different load modulation networks in Fig. 1, Fig. 2, to be imitated with ADS2011
The main amplifier of two kinds of different schemes Imitatings of true comparison is negative in saturation point (high-power) and rollback point (small-power) place
Carry variation relation of the real imaginary part of impedance with frequency.Wherein, (a) is represented under high power input condition, and major-minor power amplifier exports end resistance
Anti- real part changes and offset the curve map of optimum impedance real part with incoming frequency；(b) represent under high power input condition, it is major-minor
Power amplifier output end imaginary impedance changes with incoming frequency and offsets optimum impedance imaginary part curve map；(c) represent in low-power input
In the case of, major-minor power amplifier output terminal impedance changes with incoming frequency and offsets optimum impedance curve map.From analog result, pass
Doherty power amplifiers load impedance of uniting changes cheap phenomenon than more serious with frequency, and bandwidth is used typically in 400MHz or so
Novel load impedance modulation network load impedance proposed by the present invention is relatively steady in 1GHz bandwidth ranges, and this is effectively inhibited
The phenomenon that load impedance offsets and drifted about with incoming frequency.Doherty power amplifiers bandwidth can be improved more than one times.Carry significantly
The high bandwidth of Doherty power amplifier.
The explanation of above example is only intended to the method and its core concept for helping to understand the present invention.It should be pointed out that pair
, under the premise without departing from the principles of the invention, can also be to present invention progress for those skilled in the art
Some improvement and modification, these are improved and modification is also fallen into the protection domain of the claims in the present invention.To these embodiments
A variety of modifications are it will be apparent that General Principle defined herein can be for those skilled in the art
Realized in other embodiments in the case of not departing from the spirit or scope of the present invention.Therefore, the present invention is not intended to be limited to
These embodiments shown in the application, and be to fit to consistent with features of novelty with principle disclosed in the present application most wide
Scope.
Claims (5)
1. a kind of broadband Doherty power amplifier that combiner is exported based on modified, it is characterised in that its topological structure master
To include decile power splitter, carrier power amplifying circuit, peak power amplifying circuit and novel load modulating network；Wherein,
Decile power splitter is used to export respectively to the carrier power amplifying circuit and its peak work after input power is carried out into decile
Rate amplifying circuit, the novel load modulating network includes the first impedance modified line T1, the second impedance modified line T2 and the 3rd impedance becomes
Line T3, the first impedance modified line T1 are 50 Europe quarter-wave impedance modified lines, and the second impedance modified line T2 is 35 Ou Si
/ mono- wavelength impedance modified line, the 3rd impedance modified line T3 is the wavelength impedance modified line of 50 Europe 1/2nd；The carrier power
Output termination the first impedance modified line T1 of amplifying circuit one end, the other end and the peak of the first impedance modified line T1
The output end of value power amplification circuit is connected and exports power combiner to load by the second impedance modified line T2 again,
The 3rd impedance modified line T3 in parallel at combining point；
Carrier wave input matching circuit, Carrier Power Amplifier, the carrier wave that the carrier power amplifying circuit includes being sequentially connected in series are defeated
Go out match circuit and carrier power amplifier reference-junction compensation line；The peak power amplifying circuit include be sequentially connected in series 50 Ou Si/
One wavelength phases delay line, peak value input matching circuit, peak power amplifier, peak value output matching circuit, peak value power amplifier are defeated
Go out end compensating line；The Carrier Power Amplifier is AB power-like amplifiers, and the peak power amplifier is C class power amplifications
Device.
2. the broadband Doherty power amplifier according to claim 1 that combiner is exported based on modified, its feature is existed
In, output impedance of the Carrier Power Amplifier when low-power is inputted be 100 Europe, and the load impedance in high input power
For 50 Europe.
3. the broadband Doherty power amplifier according to claim 1 or 2 that combiner is exported based on modified, it is special
Levy and be, output impedance of the peak power amplifier when low-power is inputted is infinity, and born in high input power
Load impedance is 50 Europe.
4. a kind of broadband Doherty power amplifier that combiner is exported based on modified according to claim 3, it is special
Levy and be, the Carrier Power Amplifier and the peak power amplifier are realized using transistor.
5. a kind of implementation method for the broadband Doherty power amplifier that combiner is exported based on modified, it is characterised in that bag
Include following steps：
The AB power-like amplifiers of a standard are debugged, as Carrier Power Amplifier, while adjusting reference-junction compensation line length
It is 100 Europe to cause output impedance of the Carrier Power Amplifier when low-power is inputted, and Carrier Power Amplifier is in high input work
Load impedance is 50 Europe during rate；
The C power-like amplifiers of a standard are debugged, as peak power amplifier, while adjusting the output of peak power amplifier
The compensation line length at end so that output impedance of the peak power amplifier when low-power is inputted is infinity so that its peak work
Rate amplifier load impedance in high input power is 50 Europe；
Novel load modulating network is designed, the novel load modulating network includes the first impedance modified line T1, the second impedance modified line
T2 and the 3rd impedance modified line T3, the first impedance modified line T1 is 50 Europe quarter-wave impedance modified lines, second impedance
Modified line T2 is 35 Europe quarter-wave impedance modified lines, and the 3rd impedance modified line T3 becomes for the wavelength impedance of 50 Europe 1/2nd
Line；Output termination the first impedance modified line T1 of carrier power amplifying circuit one end, the first impedance modified line T1
The other end be connected with the output end of the peak power amplifying circuit and by power combiner again by second impedance become
Line T2 is exported to load, the 3rd impedance modified line T3 in parallel at combining point；
The carrier power amplifier debugged, peak value power amplifier, power splitter and novel load modulating network are combined and constitute bandwidth
Doherty power amplifier.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108763640A (en) * | 2018-04-20 | 2018-11-06 | 杭州电子科技大学 | The Doherty power amplifier and its design method that high efficiency height retracts |
| CN108923760A (en) * | 2018-06-26 | 2018-11-30 | 杭州电子科技大学 | A kind of Central Symmetric Doherty power amplifier and its design method |
| CN109921750A (en) * | 2019-01-24 | 2019-06-21 | 杭州电子科技大学 | A kind of wideband power amplifer and its design method based on active load modulation |
| WO2019134702A1 (en) * | 2018-01-05 | 2019-07-11 | 中兴通讯股份有限公司 | Out-of-phase power amplifier and method and device for realizing output matching therefor and power amplifier branch |
| CN110266275A (en) * | 2019-07-23 | 2019-09-20 | 杭州电子科技大学富阳电子信息研究院有限公司 | A kind of broadband Doherty power amplifier of continuous inverse F class and the mixing of J class |
| CN111181496A (en) * | 2019-10-29 | 2020-05-19 | 恩智浦美国有限公司 | Doherty amplifier with complex combined load matching circuit |
| CN111641390A (en) * | 2020-06-15 | 2020-09-08 | 重庆邮电大学 | High-efficiency Doherty power amplifier based on T-PI type combiner network and design method |
| CN112636707A (en) * | 2020-12-28 | 2021-04-09 | 杭州电子科技大学 | Broadband out-phase power amplifier and design method thereof |
| CN114142203A (en) * | 2021-12-09 | 2022-03-04 | 清华大学 | Power synthesizer and equivalent circuit based on slot line-grounding coplanar waveguide structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110266275B (en) * | 2019-07-23 | 2024-05-14 | 杭州电子科技大学 | Broadband Doherty power amplifier with continuous inverse F-class and J-class mixing |
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| CN111641390A (en) * | 2020-06-15 | 2020-09-08 | 重庆邮电大学 | High-efficiency Doherty power amplifier based on T-PI type combiner network and design method |
| CN112636707A (en) * | 2020-12-28 | 2021-04-09 | 杭州电子科技大学 | Broadband out-phase power amplifier and design method thereof |
| CN112636707B (en) * | 2020-12-28 | 2024-02-09 | 杭州电子科技大学 | Broadband outphasing power amplifier and design method thereof |
| CN114142203A (en) * | 2021-12-09 | 2022-03-04 | 清华大学 | Power synthesizer and equivalent circuit based on slot line-grounding coplanar waveguide structure |
| CN114142203B (en) * | 2021-12-09 | 2023-06-30 | 清华大学 | Power synthesizer and equivalent circuit based on slot line-grounding coplanar waveguide structure |
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