CN106487337A - A kind of multi-channel Doherty amplifier - Google Patents
A kind of multi-channel Doherty amplifier Download PDFInfo
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- CN106487337A CN106487337A CN201510542798.7A CN201510542798A CN106487337A CN 106487337 A CN106487337 A CN 106487337A CN 201510542798 A CN201510542798 A CN 201510542798A CN 106487337 A CN106487337 A CN 106487337A
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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
Abstract
The invention discloses a kind of multi-channel Doherty amplifier, including main road, first peak road collection and the second peak Lu Ji, described first peak road collection comprises NGe Feng road, and N is more than or equal to 2, and described second peak Lu Ji comprises N ' Ge Feng road, and N ' is more than or equal to 1；Described amplifier has input network, and described input network connects described amplifier in the first input end of described main road and described first peak road collection and described second peak road the respective input concentrating each peak road；Described amplifier has output network, and in described output network, described amplifier main road is first combined with described first peak road collection, form the first combining point, then it is combined with described second peak Lu Ji again, forms the second combining point, described second combining point is connected with described amplifier out.The efficiency that the multi-channel Doherty amplifier that the present invention provides solves multichannel pmultiple amplifier in prior art has, between two efficiency peak points, the technical problem being decreased obviously in high rollback.
Description
Technical field
The present invention relates to electronic device field, more particularly, to a kind of multi-channel Doherty amplifier.
Background technology
The base station system of modern wireless communication networks need to consume big energy when transmitting a signal to user terminal,
So the efficiency of system is increasingly taken seriously, especially as the power amplifier of base station system end, its
The height of energy consumption is the key of base station energy consumption height.In order to more efficiently utilize frequency spectrum resource, current base station
Widely used OFDM (Orthogonal Frequency Division Multiplexing：Orthogonal frequency division multiplexing
With), WCDMA (Wideband Code Division Multiple Access：WCDMA) contour
Peak-to-average force ratio modulation system it is desirable to power amplifier normal work under conditions of high peak-to-average power ratio, put by therefore power
Big device not only will meet linear index requirement, simultaneously need to reaching higher work efficiency.
Its efficient dynamic range of the symmetrical Doherty of traditional two-way is 6dB, for having more high peak-to-average power ratio
Signal, it puies forward efficient performance is limited.In order to improve the efficiency of Doherty further, permissible
Using unsymmetric structure and many line structures.Although unsymmetric structure can expand high efficiency scope, its effect
Rate significantly decreases between two peak points.So in wireless communication field general using both can expanding
Efficiency range, and because there being multiple efficiency peak points, there are many line structures of higher efficiency.But, return high
When moving back, the efficiency of traditional many line structures and the many line structures of Novel has in two peak points and is decreased obviously.
Traditional multichannel pmultiple amplifier includes a main road and multiple peak road, and its each peak road is independent and main
Road is combined., shown in Fig. 1 is the principle of traditional multichannel pmultiple amplifier taking traditional No. three amplifiers as a example
Figure, Fig. 2 is the efficiency curve diagram of traditional three road amplifier operation, it can be seen that traditional three tunnels are put
Three efficiency peak points are had, between peak point, efficiency curve has efficiency pit during big device work.This effect
Rate pit has had a strong impact on the lifting of traditional multichannel Doherty power amplifier efficiency when high score is all than signal.
Content of the invention
The main technical problem to be solved in the present invention is to provide one kind in high rollback, two efficiency peak points
Between do not have a multichannel pmultiple amplifier being decreased obviously, solve traditional many line structures and Novel in prior art many
The efficiency of line structure can significantly decrease between two efficiency peak points in high rollback technical problem.
For solving above-mentioned technical problem, the present invention provides a kind of multi-channel Doherty amplifier, described multichannel
Doherty amplifier includes main road, first peak road collection and the second peak Lu Ji, and described first peak road collection comprises N number of
Peak road, N is more than or equal to 2, and described second peak Lu Ji comprises N ' Ge Feng road, and N ' is more than or equal to 1；Described put
Big utensil has input network, and described amplifier in is connected to the first of described main road by described input network
Input and described first peak road collection and described second peak road concentrate the respective input on each peak road；Described
Amplifier has output network, in described output network, described amplifier main road first with described first peak road
Collection is combined, and forms the first combining point, is then combined with described second peak Lu Ji again, forms second
Combining point, described second combining point is connected with described amplifier out.
In an embodiment of the present invention, in described output network, first output and described the of described main road
It is provided with first matching impedance between 1 combining point；Between described first combining point and described second combining point
It is provided with second matching impedance.
In an embodiment of the present invention, described first peak road collection is specially：Described first peak road is concentrated except the
Outside one peak road, other all peaks roads are combined with the first peak road of described first peak road collection respectively.
In an embodiment of the present invention, described first peak road is concentrated, and described first peak road is concentrated and removed first peak
Outside road, other all peaks roads are combined with the first peak road of described first peak road collection respectively and form N-1
Combining point, is both provided with before each combining point drawing impedance.
In an embodiment of the present invention, described second peak road collection is specially：Described second peak road is concentrated except the
Outside one peak road, other all peaks roads are combined with the first peak road of described second peak road collection respectively.
In an embodiment of the present invention, described second peak road is concentrated, and described second peak road is concentrated and removed first peak
Outside road, other all peaks roads are combined and form N ' -1 with the first peak road of described second peak road collection respectively
Individual combining point, is both provided with before each combining point drawing impedance.
In an embodiment of the present invention, N is more than or equal to N '.
In an embodiment of the present invention, the amplifier operation of described main road is in AB class state or B class state.
In an embodiment of the present invention, each peak road of the second peak road collection described in described first peak Lu Jiyu
Amplifier operation is in C class state.
In an embodiment of the present invention, when N is equal to 2, N ' and is equal to 1, the of described first peak road collection
One peak road is combined with the second peak road of described first peak road collection, forms the 3rd combining point；Described input net
The first impedance comprising in network to be mated with described main road is carried out with the second peak road of described first peak road collection
The second impedance mated and the 3rd impedance mated with the first peak road of described second peak road concentration；Described
Described in output network, first peak road is concentrated and is provided with one between the output on first peak road and described 3rd combining point
4th impedance, is provided with the 5th impedance between described 3rd combining point and described first combining point；Described
Two peaks road are concentrated and are provided with the 6th impedance and the 7th impedance between the output on first peak road and described second combining point.
The invention has the beneficial effects as follows：
The present invention provide multi-channel Doherty amplifier pass through using allow first peak road collection each peak road advanced
Row combining, then with main road combining, is finally connected to main road by after each peak road combining of the second Ge Feng road collection
On combining mode, improve efficiency in efficiency high rollback between two peak points for the amplifier so that effect
Rate no obvious pit in more than rollback 6dB.
Brief description
Fig. 1 is the schematic diagram of traditional multi-channel Doherty amplifier；
Fig. 2 is the efficiency curve diagram of traditional multi-channel Doherty amplifier work；
Fig. 3 is a kind of schematic diagram of multi-channel Doherty amplifier of the present invention；
Fig. 4 is a kind of schematic diagram of four road Doherty amplifiers of the present invention；
Fig. 5 is a kind of a kind of schematic diagram of specific embodiment of four road Doherty amplifiers of the present invention；
Fig. 6 is a kind of impedance plot of four road Doherty amplifier operation of the present invention；
Fig. 7 is a kind of efficiency curve diagram of four road Doherty amplifier operation of the present invention.
Specific embodiment
Combine accompanying drawing below by specific embodiment the present invention is described in further detail.
In order to solve the high rollback of efficiency of amplitude of traditional many line structures and the many line structures of Novel in prior art
When the problem that is decreased obviously in two peak points, the present invention provides a kind of multi-channel Doherty amplifier, refer to
Fig. 3：
The multi-channel Doherty amplifier of the present invention includes a main road 301, a first peak road collection 302 and
Individual second peak road collection 303.First peak road collection comprises NGe Feng road, and the second peak Lu Ji comprises N ' Ge Feng road, and
N is more than or equal to 2, N ' and is more than or equal to 1；Preferably, N is more than or equal to N '.Multichannel Doherty that the present invention provides
Amplifier also comprises to input network 312 and output network 313；Amplifier is inputted 308 points by input network 312
It is not connected to main input, the input of first peak road collection and the second peak road collection input；In output network 313,
The output of amplifier main road is first combined with the output of first peak road collection, formation the first combining point 304, then again with
Second peak road collection output is combined, and forms the second combining point 305, and output network 313 realizes the second combining point
Connection with amplifier output 309.
It is provided with an impedance 306 between the output of main road amplifier and the first combining point 304, when first peak road
Collect 302 in running order when, impedance 306 is used for forming draw to the load impedance of main road 301,
The load impedance making main road 301 reduces；Similarly, in the second combining point 305 and the first combining point 304
Between be provided with an impedance 307, when the second peak road collection 303 is in running order, it is right that impedance 307 is used for
The load impedance of main road 301 forms draw so that the load impedance of main road 301 reduces.
For the combining mode of first peak road collection 302 and the second peak road collection 303, make into one here in conjunction with Fig. 1
The explanation of step, in the middle of first peak road collection 302, other peak roads in addition to first peak road are all in order one by one
It is combined with first peak road, before the combining point that each is combined with other peak roads on first peak road
One traction impedance being used for the load impedance on first peak road is drawn will be set.Likewise, second
The combining mode of peak road collection 303 is identical with the combining mode of first peak road collection 302, repeats no more here.
In input network 312, it is provided with for phase equilibrium between amplifier input 308 and main input
Input impedance 310, the phase shift of input impedance 310 is * 90 ° of (N-2)；First peak road is concentrated and is removed first peak
Beyond road, each peak road other input and are also equipped between the amplifier of corresponding peak road putting down for phase place
The input impedance of weighing apparatus, and the input on the phase shift of the input impedance on each peak road next the peak road more adjacent than it
Impedance is little 90 °；The input impedance set-up mode of the second peak road collection is similar with the input impedance of first peak road collection,
Second peak road is concentrated, the input on next also adjacent than it peak road of the phase shift of the input impedance on each peak road
Impedance is little 90 °, and except for the difference that, the first peak road of the second peak road collection inputs to be had between its corresponding amplifier
There is the input impedance that phase shift is 90 °, so, accordingly, in putting of the first peak road of the second peak road collection
After big device, an extra matching impedance 311 can be set, the phase shift of matching impedance is 90 °.
When N is equal to 2, N ' and is equal to 1, one kind four road Doherty amplifier providing for the present invention.Please
With reference to Fig. 4-5, Carrier road is as the main road of four road Doherty amplifiers；Peak1 road and Peak2 road
Liang Gefeng road for first peak road collection；Peak3 road is as the second peak Lu Ji of four road Doherty amplifiers；Its
In, Peak1 road and Peak2 road are first combined, then with the combining of Carrier road, last Peak3 combining
It is combined with main road again.
In order that four road Doherty amplifiers obtain higher work efficiency, Carrier road amplifier operation
In AB class state or B class state, other Peak road amplifier operation are in C class state.In the present embodiment,
Preferably, in AB class state, 3 Peak road amplifier operation are in C class shape for Carrier road amplifier operation
State.
Refer to Fig. 4, input network includes shunt 409, shunt 409 is used for distribution in amplifier input
The power of the input signal receiving at 401 to Carrier road amplifier 403, Peak1 road amplifier 404,
Peak2 road amplifier 405 and Peak3 road amplifier 406.
The input network 402 of Fig. 4 includes：Amplifier input 401 is defeated with Carrier road amplifier 403
Impedance 410 between entering；Amplifier inputs the impedance 411 between the input of 401 and Peak2 road amplifiers 405；
And input the impedance 412 between the input of 401 and Peak3 road amplifiers 406 in amplifier.
The output network 407 of Fig. 4 includes：Export with amplifier in the output of Carrier road amplifier 403
Impedance 413 and the impedance 414 of arranged in series is included between 408；Peak1 road amplifier 404 output with
The impedance 415 of arranged in series and impedance 416 between first combining point；Output in Peak3 road amplifier 406
The impedance 417 of arranged in series and impedance 418 and the second combining point between.
In a kind of specific embodiment of four road Doherty amplifiers, Fig. 4 is inputted the shunt in network
Realized by three bonders, each impedance in corresponding input network can carry out new coupling, such as Fig. 5
Shown：Amplifier inputs the power of 501 receives input signals, and three-dB coupler 502,504 and 506 is defeated
Enter the 4 tunnel input signals that are divided into of signal, the isolation end of three bonders connect respectively the load 503 in 50 Europe,
505 and 507.It is connected 1/4 ripple in 50 Europe between the straight-through end of bonder 506 and Carrier road input
Long line 508, is connected 1/4 wavelength line in 50 Europe between the coupled end of bonder 506 and Peak1 road input
509, it is connected 1/4 wavelength line 510 in 50 Europe between the straight-through end of bonder 504 and Peak2 road input,
For compensating phase place.The output of Carrier road amplifier 511 and amplifier export two ends of connecting between 521
1/4 wavelength impedance change line 515 and 518, its characteristic impedance is respectively 38 Europe and 13.1 Europe；Peak1 road
Two ends 1/4 wavelength impedance of connecting between the output of amplifier 512 and the first combining point changes line 516 and 517,
Its characteristic impedance is respectively 46 Europe and 18.5 Europe；The output of Peak2 road amplifier 513 is connected to impedance 516
And between 517.Series connection two ends 1/4 between the output of Peak3 road amplifier 514 and amplifier output 521
Wavelength impedance changes line 519 and 520, and its characteristic impedance is 13.1 Europe.
Four road Doherty amplifier operation can divide four-stage：
First stage：During weak signal, three Peak road power amplifiers are all not turned on, in the first combining point 523
With assume "off" state at the second combining point 525, only Carrier road amplifier 511 is to load 522
There is provided electric current, its load is not towed, and the load of Carrier road amplifier 511 is through impedance 515 and impedance
518 are transformed to high resistant so that Carrier road amplifier 511 voltage saturation point shifts to an earlier date, when exporting same power
Efficiency improve.Increase Carrier road with input signal reaches maximum power output, Carrier road electricity
Pressure reaches saturation, and now Doherty amplifier reaches first efficiency peak point；
Second stage：During small-signal, Peak2 road amplifier 513 and Peak3 road amplifier 514 are not turned on,
Assume "off" state at the second combining point 525 and the 3rd combining point 524 respectively.With input power
Increase, Peak1 road starts output current.Due to exporting the effect of network, the load impedance on Carrier road
It is pulled, the load impedance on Carrier road and Peak1 road all reduces.Due to Peak2 road exist so that
This draw strengthens, as long as therefore suitably increasing input signal, Peak1 road reaches maximum power output, this
When Doherty amplifier reach second efficiency peak point；
Phase III：During msp signal, Peak3 road amplifier 514 is not turned on, at the second combining point 525
Assume "off" state.With the increase of input power, Peak2 road starts output current, Carrier road
It is pulled further with the load impedance of Peak1, until Carrier road, electric current reaches saturation, Carrier
Road load impedance is reduced to minimum, and the load impedance of Peak1 and Peak2 all reduces.Peak2 road reaches maximum
Power output, now Doherty amplifier reach the 3rd efficiency peak point；
Fourth stage：During big signal, Peak3 road amplifier 514 starts output current, Peak1 and Peak2
Load impedance be pulled, the load impedance of Peak1 and Peak2 continues to reduce, and Carrier seriously satisfies on road
With.Peak3 road amplifier 514 reaches maximum power output, and now Doherty amplifier reaches the 4th effect
Rate peak point.
Refer to the impedance plot of four road Doherty amplifier operation, as shown in fig. 6, wherein Carrier,
Peak1, Peak2, Peak3 represent Carrier road, Peak1 road, Peak2 road and Peak3 road respectively
Load impedance change curve.From fig. 6, it can be seen that when three Peak road power amplifiers are all not turned on,
The load on Carrier road is not towed；When Peak1 road starts output current, the load on Carrier road
Impedance is pulled, and the load impedance on Carrier road and Peak1 road all reduces；When Peak2 road starts to export
During electric current, the load impedance of Carrier road and Peak1 is pulled further, and when Carrier road, electric current reaches
During to saturation, its load impedance is reduced to minimum；When Peak3 road starts output current, Carrier road
Load impedance remains unchanged substantially, and the load impedance of Peak1 and Peak2 is in the trend continuing to reduce, until
It is reduced to minimum.
The efficiency curve diagram of Tu7Wei tetra- road Doherty amplifier operation, this efficiency curve has four peak values
Point, the first peak point respectively at rollback 9.5dB, 6dB, 2.5dB and 0dB, at rollback 9.5dB
Efficiency curve and the 3rd peak point at rollback 2.5dB between does not have traditional multi-channel Doherty amplifier
Efficiency pit, has peak efficiency peak point during rollback 6dB.
By contrasting the efficiency curve of four road Doherty amplifiers of traditional No. three amplifiers and present invention offer
Figure, that is, contrast Fig. 7 and Fig. 2 is it can be seen that the multi-channel Doherty amplifier that the present invention provides can be effective
The efficiency of traditional many line structures and the many line structures of Novel two efficiency peaks in high rollback in solution prior art
Can be significantly decreased between value point technical problem.
Above content is to further describe it is impossible to recognize with reference to specific embodiment is made for the present invention
Determine the present invention be embodied as be confined to these explanations.Ordinary skill for the technical field of the invention
For personnel, without departing from the inventive concept of the premise, some simple deduction or replace can also be made,
Protection scope of the present invention all should be considered as belonging to.
Claims (10)
1. a kind of multi-channel Doherty amplifier is it is characterised in that described multi-channel Doherty amplifier bag
Include main road, first peak road collection and the second peak Lu Ji, described first peak road collection comprises NGe Feng road, and N is more than or equal to
2, described second peak Lu Ji comprises N ' Ge Feng road, and N ' is more than or equal to 1；Described amplifier has input network,
Described amplifier in is connected the first input end and described first to described main road by described input network
The respective input on each peak road is concentrated on peak road collection and described second peak road；Described amplifier has output network,
In described output network, described amplifier main road is first combined with described first peak road collection, forms first
Combining point, is then combined with described second peak Lu Ji again, forms the second combining point, described second combining
Point is connected with described amplifier out.
2. multi-channel Doherty amplifier as claimed in claim 1 is it is characterised in that described output net
In network, between the first output of described main road and described first combining point, it is provided with first matching impedance；Institute
State and be provided with second matching impedance between the first combining point and described second combining point.
3. multi-channel Doherty amplifier as claimed in claim 1 is it is characterised in that described first peak
Road collection is specially：Described first peak road is concentrated in addition to first peak road, and other all peaks roads are respectively with described first
The first peak road of peak road collection is combined.
4. multi-channel Doherty amplifier as claimed in claim 3 is it is characterised in that described first peak
Road is concentrated, and described first peak road is concentrated in addition to first peak road, other all peaks roads respectively with described first peak road
The first peak road of collection is combined and forms N-1 combining point, is both provided with drawing before each combining point
Impedance.
5. multi-channel Doherty amplifier as claimed in claim 1 is it is characterised in that described second peak
Road collection is specially：Described second peak road is concentrated in addition to first peak road, and other all peaks roads are respectively with described second
The first peak road of peak road collection is combined.
6. multi-channel Doherty amplifier as claimed in claim 5 is it is characterised in that described second peak
Road concentrate, described second peak road concentrate in addition to first peak road, other all peaks roads respectively with described second peak road
The first peak road of collection is combined and forms -1 combining point of N ', is both provided with leading before each combining point
Draw impedance.
7. the multi-channel Doherty amplifier as described in any one of claim 1-6 is it is characterised in that N
More than or equal to N '.
8. multi-channel Doherty amplifier as claimed in claim 7 is it is characterised in that described main road
Amplifier operation is in AB class state or B class state.
9. multi-channel Doherty amplifier as claimed in claim 7 is it is characterised in that described first peak
Described in Lu Jiyu, the amplifier operation on each peak road of the second peak road collection is in C class state.
10. multi-channel Doherty amplifier as claimed in claim 7 is equal to 2 it is characterised in that working as N,
When N ' is equal to 1, the second peak road of the first peak road of described first peak road collection and described first peak road collection is closed
Road, forms the 3rd combining point；The first impedance of comprising in described input network to be mated with described main road,
The second impedance of being mated with the second peak road of described first peak road collection and concentrate with described second peak road the
The 3rd impedance that one peak road is mated；The defeated of first peak road is concentrated on first peak road described in described output network
Go out and be provided with the 4th impedance and described 3rd combining point between, described 3rd combining point and described first combining
It is provided with the 5th impedance between point；The output on first peak road and described second combining are concentrated in described second peak road
It is provided with the 6th impedance and the 7th impedance between point.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510542798.7A CN106487337A (en) | 2015-08-28 | 2015-08-28 | A kind of multi-channel Doherty amplifier |
| PCT/CN2016/073693 WO2017036093A1 (en) | 2015-08-28 | 2016-02-05 | Multipath doherty amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510542798.7A CN106487337A (en) | 2015-08-28 | 2015-08-28 | A kind of multi-channel Doherty amplifier |
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| Publication Number | Publication Date |
|---|---|
| CN106487337A true CN106487337A (en) | 2017-03-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510542798.7A Pending CN106487337A (en) | 2015-08-28 | 2015-08-28 | A kind of multi-channel Doherty amplifier |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106487337A (en) |
| WO (1) | WO2017036093A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107919858A (en) * | 2017-10-26 | 2018-04-17 | 电子科技大学 | Wideband/Ultra-Wideband high power amplifier based on combining mechanism |
| CN107947744A (en) * | 2017-11-28 | 2018-04-20 | 广东工业大学 | The power amplifier and millimeter wave chip of a kind of power combing type |
| CN109831164A (en) * | 2019-02-13 | 2019-05-31 | 清华大学 | High rollback efficiency power amplifier based on distributed input/output structure |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3066643A1 (en) | 2017-07-21 | 2019-01-24 | Telefonaktiebolaget Lm Ericsson (Publ) | Multistage doherty power amplifier and transmitter |
| CN109327191B (en) | 2017-07-31 | 2023-10-24 | 安普林荷兰有限公司 | Four-way doherty amplifier and mobile communication base station |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355198B (en) * | 2011-08-01 | 2013-11-27 | 深圳大学 | Multi-path asymmetrical Doherty power amplifier |
| EP2751926A4 (en) * | 2011-12-15 | 2015-07-29 | Ericsson Telefon Ab L M | Doherty power amplification apparatus and method |
| EP2608400B1 (en) * | 2011-12-20 | 2014-08-13 | Nxp B.V. | N way Doherty amplifier |
| CN103178786A (en) * | 2011-12-26 | 2013-06-26 | 瑞典爱立信有限公司 | Multiway Doherty amplifier |
| CN103580612A (en) * | 2012-08-10 | 2014-02-12 | 中兴通讯股份有限公司 | Power amplification tube device, multi-channel radio-frequency power amplification circuit and implementation method thereof |
-
2015
- 2015-08-28 CN CN201510542798.7A patent/CN106487337A/en active Pending
-
2016
- 2016-02-05 WO PCT/CN2016/073693 patent/WO2017036093A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107919858A (en) * | 2017-10-26 | 2018-04-17 | 电子科技大学 | Wideband/Ultra-Wideband high power amplifier based on combining mechanism |
| CN107947744A (en) * | 2017-11-28 | 2018-04-20 | 广东工业大学 | The power amplifier and millimeter wave chip of a kind of power combing type |
| CN109831164A (en) * | 2019-02-13 | 2019-05-31 | 清华大学 | High rollback efficiency power amplifier based on distributed input/output structure |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017036093A1 (en) | 2017-03-09 |
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Application publication date: 20170308 |