CN106357222A - Doherty power amplifier circuit - Google Patents
Doherty power amplifier circuit Download PDFInfo
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- CN106357222A CN106357222A CN201510412287.3A CN201510412287A CN106357222A CN 106357222 A CN106357222 A CN 106357222A CN 201510412287 A CN201510412287 A CN 201510412287A CN 106357222 A CN106357222 A CN 106357222A
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- power amplifier
- output matching
- matching circuit
- frequency range
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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
Abstract
The invention provides a Doherty power amplifier circuit, which includes a main power amplifier and an auxiliary power amplifier, and also includes a first adaptive crossover network, a second adaptive crossover network, a first output matching circuit, a second output matching circuit and pilot frequency mixer, wherein the first adaptive frequency dividing network is used for separating the signal of the first frequency band and the second frequency band in the output signal of the main power amplifier and the auxiliary power amplifier respectively. The second adaptive frequency dividing network is used to separate the signal of the first frequency band and the signal of the second frequency band in the output signal of the main power amplifier and the auxiliary power amplifier respectively. The pilot frequency mixer is used for the output signal of the first output matching circuit and second output matching circuit and output. Through the Doherty power amplifier circuit, the problem of low efficiency of dual frequency Doherty power amplifier is solved, and the efficiency of dual band Doherty power amplifier is improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of doherty power amplifier.
Background technology
With the quick evolution of new generation of wireless communication technology, high data rate, multi-mode transmission and green communications
Development trend makes people focus more on bandwidth of operation and the efficiency of power amplifier, and this is accomplished by people and studies double frequency power amplifier further
High efficiency technology.A kind of presently the most wide variety of technology is exactly doherty technology, therefore how in this technology
On the basis of expand bandwidth further, improve power amplification efficiency and just seem more important.
Fig. 1 is the doherty power amplifier principle schematic according to correlation technique, as shown in figure 1, traditional doherty
Circuit is made up of two power amplifiers: a main power amplifier, an auxiliary power amplifier, and main power amplifier is operated in b class or ab class, auxiliary
Assist is put and is operated in c class.Two power amplifiers match 50 ohm through respective micro-strip output matching circuit, in main power amplifier
Connect quarter-wave 50 ohm microstrip after micro-strip output matching circuit and realize impedance change action, at combining end
In micro-strip mating structure end and the quarter-wave line terminal of main power amplifier of auxiliary power amplifier, typically adopt special behind combining end
Levying impedance is that 35 ohm of quarter-wave transmission lines realize 25 ohm to 50 ohmages conversion.
The present inventor finds in research process, in traditional doherty circuit, double frequency doherty power amplifier
Mentality of designing is to be designed to comprise the broadband doherty power amplifier of two working bands, is usually to leak power amplifier in the design
Pole output matching circuit is designed with the output matching circuit of broadband character, but because power tube is originally in different frequent points
Impedance discrete larger so that design broadband matching circuit during be difficult to meet two band signals matched well,
Thus lead to double frequency doherty power amplifier efficiency low.
For the low problem of the efficiency of correlation technique double frequency doherty power amplifier, effective solution is not yet proposed at present.
Content of the invention
The invention provides a kind of doherty power amplifier, at least to solve double frequency doherty power amplifier in correlation technique
The low problem of efficiency.
According to an aspect of the invention, it is provided a kind of doherty power amplifier, including main power amplifier and auxiliary
Power amplifier, also includes: the first self adaptation dividing network, the second self adaptation dividing network, the first output matching circuit,
Second output matching circuit and pilot frequency combiner, wherein, the outfan of described first self adaptation dividing network respectively with institute
State the input of the first output matching circuit, the input of described second output matching circuit connects, described first self adaptation
Dividing network is used for respectively being isolated by the in the output signal of described main power amplifier and described auxiliary power amplifier
The signal of one frequency range and the signal of the second frequency range, and it is respectively fed to described first output matching circuit and described second output
Join processing of circuit, wherein, described first output matching circuit is used for mating described first frequency range, described second output matching
Circuit is used for mating described second frequency range；The outfan of described second self adaptation dividing network respectively with described first output
The input on distribution road, the input of described second output matching circuit connect, and described second self adaptation dividing network is used for
It respectively is isolated by the signal of the first frequency range in the output signal of described main power amplifier and described auxiliary power amplifier
With the signal of the second frequency range, and be respectively fed to described first output matching circuit and described second output matching circuit process；
The input of described pilot frequency combiner outfan, the described second output matching electricity with described first output matching circuit respectively
The outfan on road connects, for closing the output signal of described first output matching circuit and described second output matching circuit
Road simultaneously exports.
Preferably, described first output matching circuit includes: the first match circuit being connected with described main power amplifier,
And the second match circuit being connected with described auxiliary power amplifier, wherein, described first match circuit is through a quarter
Wave microstrip line is combined with described second match circuit, the conjunction of described first match circuit and described second match circuit
Terminal passes sequentially through the quarter-wave microstrip line of the first characteristic impedance and the microstrip transmission line of the first impedance is different with described
Frequency combiner connects；Described second output matching circuit includes: the 3rd match circuit being connected with described main power amplifier,
And the 4th match circuit being connected with described auxiliary power amplifier, wherein, described 3rd match circuit is through a quarter
Wave microstrip line is combined with described 4th match circuit, the conjunction of described 3rd match circuit and described 4th match circuit
Terminal passes sequentially through the quarter-wave microstrip line of the second characteristic impedance and the microstrip transmission line of the second impedance is different with described
Frequency combiner connects.
Preferably, described first characteristic impedance is 35 ohm；Described first impedance is 50 ohm.
Preferably, described main power amplifier power tube root impedance at described first frequency range is matched as 50 ohm；
The power tube root impedance at described first frequency range of described auxiliary power amplifier is matched as 50 ohm.
Preferably, the input of the input of the described pilot frequency combiner being connected with the outfan of described first output matching circuit
Impedance is 50 ohm.
Preferably, described second characteristic impedance is 35 ohm；Described second impedance is 50 ohm.
Preferably, described main power amplifier power tube root impedance at described second frequency range is matched as 50 ohm；
The power tube root impedance at described second frequency range of described auxiliary power amplifier is matched as 50 ohm.
Preferably, the input of the input of the described pilot frequency combiner being connected with the outfan of described second output matching circuit
Impedance is 50 ohm.
Preferably, described first frequency range is 1805mhz to 1845mhz；Described second frequency range is for 2130mhz extremely
2170mhz.
Preferably, described main power amplifier bias are in ab class state；Described auxiliary power amplifier is biased in c class shape
State.
By the present invention, using the first self adaptation dividing network, the second self adaptation dividing network, the first output matching circuit,
Second output matching circuit and pilot frequency combiner, wherein, the outfan of the first self adaptation dividing network is defeated with first respectively
Go out the input of match circuit, the input of the second output matching circuit connects, the first self adaptation dividing network is used for leading
It respectively is isolated by the signal of the first frequency range and the second frequency range in the output signal of power amplifier and auxiliary power amplifier
Signal, and it is respectively fed to the first output matching circuit and the process of the second output matching circuit, wherein, the first output matching electricity
Road is used for coupling the first frequency range, and the second output matching circuit is used for coupling the second frequency range；Second self adaptation dividing network defeated
Go out end to be connected with the input of the first output matching circuit, the input of the second output matching circuit respectively, the second self adaptation
Dividing network is used for respectively being isolated by the first frequency range in the output signal of main power amplifier and auxiliary power amplifier
Signal and the signal of the second frequency range, and it is respectively fed to the first output matching circuit and the process of the second output matching circuit；Alien frequencies
The input of combiner is connected with the outfan of the first output matching circuit, the outfan of the second output matching circuit respectively,
For by the output signal combining of the first output matching circuit and the second output matching circuit and the circuit that exports, solving double
The low problem of the efficiency of frequency doherty power amplifier, improves the efficiency of double frequency doherty power amplifier.
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 the doherty power amplifier principle schematic according to correlation technique；
Fig. 2 is the structured flowchart of doherty power amplifier according to embodiments of the present invention；
Fig. 3 is the preferred structure block diagram of doherty power amplifier according to embodiments of the present invention；
Fig. 4 is double frequency high efficiency self adaptation doherty circuit structure block diagram according to the preferred embodiment of the 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.
Provide a kind of doherty power amplifier in the present embodiment, Fig. 2 is doherty according to embodiments of the present invention
The structured flowchart of power amplifier, as shown in Fig. 2 this circuit includes main power amplifier 200 and auxiliary power amplifier 201,
Also include: the first self adaptation dividing network 202, the second self adaptation dividing network 204, the first output matching circuit 206,
Second output matching circuit 208 and pilot frequency combiner 210, wherein,
The outfan of the first self adaptation dividing network 202 respectively with the input of the first output matching circuit 206, second defeated
The input going out match circuit 208 connects, and the first self adaptation dividing network 202 is used in main power amplifier 200 and auxiliary
It respectively is isolated by the signal of the first frequency range and the signal of the second frequency range in the output signal of assist rate amplifier 201, and respectively
Send into the first output matching circuit 206 and the second output matching circuit 208 is processed, wherein, the first output matching circuit 206
For mating the first frequency range, the second output matching circuit 208 is used for coupling the second frequency range；
The outfan of the second self adaptation dividing network 204 respectively with the input of the first output matching circuit 206, second defeated
The input going out match circuit 208 connects, and the second self adaptation dividing network 204 is used in main power amplifier 200 and auxiliary
It respectively is isolated by the signal of the first frequency range and the signal of the second frequency range in the output signal of assist rate amplifier 201, and respectively
Send into the first output matching circuit 206 and the second output matching circuit 208 is processed；
The input of pilot frequency combiner 210 outfan, the second output matching electricity with the first output matching circuit 206 respectively
The outfan on road 208 connects, for believing the output of the first output matching circuit 206 and the second output matching circuit 208
Number combining simultaneously exports.
Fig. 3 is the preferred structure block diagram of doherty power amplifier according to embodiments of the present invention, as shown in figure 3, preferably
Ground, the first output matching circuit 206 includes: the first match circuit 302 being connected with main power amplifier, and with auxiliary
The second match circuit 304 that power amplifier connects, wherein, the first match circuit 302 is through quarter-wave micro-strip
Line 306 is combined with the second match circuit 304, the combining end of the first match circuit 302 and the second match circuit 304
Pass sequentially through the quarter-wave microstrip line of the first characteristic impedance 308 and the microstrip transmission line of the first impedance 310 and alien frequencies
Combiner 210 connects；
Second output matching circuit 208 includes: the 3rd match circuit 312 being connected with main power amplifier, and with auxiliary
The 4th match circuit 314 that power amplifier connects, wherein, the 3rd match circuit 312 is through quarter-wave micro-strip
Line 316 is combined with the 4th match circuit 314, the combining end of the 3rd match circuit 312 and the 4th match circuit 314
Pass sequentially through the quarter-wave microstrip line of the second characteristic impedance 318 and the microstrip transmission line of the second impedance 320 and alien frequencies
Combiner 210 connects.
Preferably, above-mentioned first characteristic impedance 308 is 35 ohm；Above-mentioned first impedance 310 is 50 ohm.
Preferably, main power amplifier 200 power tube root impedance at the first frequency range is matched as 50 ohm；Auxiliary
Power amplifier 201 power tube root impedance at the first frequency range is matched as 50 ohm.
Preferably, the input of the input of the pilot frequency combiner 210 being connected with the outfan of the first output matching circuit 206
Impedance is 50 ohm.
Preferably, above-mentioned second characteristic impedance 318 is 35 ohm；Above-mentioned second impedance 320 is 50 ohm.
Preferably, main power amplifier 200 power tube root impedance at the second frequency range is matched as 50 ohm；Auxiliary
Power amplifier 201 power tube root impedance at the second frequency range is matched as 50 ohm.
Preferably, the input of the input of the pilot frequency combiner 210 being connected with the outfan of the second output matching circuit 208
Impedance is 50 ohm.
Preferably, the first frequency range is 1805mhz to 1845mhz；Second frequency range is 2130mhz to 2170mhz.
Preferably, main power amplifier 200 is biased in ab class state；Auxiliary power amplifier 201 is biased in c class shape
State.
In order that the description of the embodiment of the present invention is clearer, it is described with reference to preferred embodiment and illustrates.
The preferred embodiment of the present invention provides a kind of double frequency-band high efficiency doherty power amplifier, and this power amplifier completes
It is capable of double frequency-band high efficiency doherty while single band high efficiency doherty.
Both the high-efficiency transfer of narrowband single frequency signal can have been realized using double frequency-band high efficiency doherty power amplifier, might be used again
To realize the high-efficiency transfer of two-frequency signal.This double frequency-band high efficiency doherty power amplifier is in main power amplifier (on being equivalent to
State main power amplifier 200) it is respectively connected to the drain electrode of auxiliary power amplifier (being equivalent to above-mentioned auxiliary power amplifier 201) pipe
Self adaptation dividing network (is equivalent to above-mentioned first self adaptation dividing network 202 and the second self adaptation dividing network 204), will
The different frequency output signal of power tube separates and by the signal output of corresponding band to output matching circuit, and self adaptation divides
Network end-point is respectively connected to matching microstrip circuit and (is equivalent to above-mentioned first output matching circuit 206 and the second output matching electricity
Road 208), matching microstrip circuit (is equivalent to above-mentioned in frequency 1 (being equivalent to above-mentioned first frequency range) and frequency 2 respectively
Two frequency ranges) place's coupling, frequency 1 match circuit (being equivalent to above-mentioned first match circuit 302) of main power amplifier is through four points
One of wave microstrip line closed with frequency 1 match circuit (being equivalent to above-mentioned second match circuit 304) of auxiliary power amplifier
Road, frequency 2 match circuit (being equivalent to above-mentioned 3rd match circuit 312) of main power amplifier is through quarter-wave micro-strip
Line is combined with frequency 2 match circuit (being equivalent to above-mentioned 4th match circuit 314) of auxiliary power amplifier, and frequency 1 is closed
Terminal connects 35 ohm characteristic impedance (being equivalent to above-mentioned first characteristic impedance 308) quarter-wave microstrip line, frequency 2
Combining terminates 35 ohm characteristic impedance (being equivalent to above-mentioned second characteristic impedance 318) quarter-wave microstrip line, in frequency
The characteristic impedance of rate 1 and frequency 2 connects 50 ohm of microstrip transmission line (phase respectively for quarter-wave microstrip line end
When in above-mentioned first impedance 310 and the second impedance 320), 50 ohm microstrip line end of frequency 1 and frequency 2 are divided
Do not connect two inputs of pilot frequency combiner (being equivalent to above-mentioned pilot frequency combiner 210), the output termination of pilot frequency combiner
Signal output.
The preferred embodiment of the present invention additionally provides a kind of double frequency self-adapted high-efficient rate doherty circuit, including power distribution list
Unit, inputs matching unit, inputs 90 degree of phase-shifters, and signal amplification unit (is equivalent to above-mentioned main power amplifier 200
With auxiliary power amplifier 201), self adaptation dividing network (is equivalent to above-mentioned first self adaptation dividing network 202 and second
Self adaptation dividing network 204), main power amplifier frequency range 1 output matching unit (is equivalent to above-mentioned first match circuit
302), main power amplifier frequency range 2 output matching unit (being equivalent to above-mentioned 3rd match circuit 312), auxiliary power is put
Big device frequency range 1 output matching unit (being equivalent to above-mentioned second match circuit 304), auxiliary power amplifier frequency range 2 exports
Matching unit (is equivalent to above-mentioned 4th match circuit 314), and frequency range 1 impedance inverted device (is equivalent to above-mentioned quarter-wave
Long microstrip line 306), frequency range 2 impedance inverted device (being equivalent to above-mentioned quarter-wave microstrip line 316), frequency range 1 hinders
Resistance parallel operation (is equivalent to above-mentioned first characteristic impedance 308), and frequency range 2 impedance transformer (is equivalent to above-mentioned second characteristic resistance
Anti- 318), pilot frequency combiner (is equivalent to above-mentioned pilot frequency combiner 210).Main power amplifier and the first self adaptation frequency dividing
Network is connected, and the first self adaptation dividing network output terminates main power amplifier frequency range 1 output matching unit and main power is put
The input of big device frequency range 2 output matching unit is connected, and auxiliary power amplifier is connected with the second self adaptation dividing network,
Second self adaptation dividing network output termination auxiliary power amplifier frequency range 1 output matching unit and auxiliary power amplifier frequency
The input of section 2 output matching units is connected, and it is inverse that main power amplifier frequency range 1 output matching unit passes through frequency range 1 impedance
The input putting device with frequency range 1 impedance transformer is connected, and main power amplifier frequency range 2 output matching unit passes through frequency range 2
Impedance inverted device is connected with the input of frequency range 2 impedance transformer, auxiliary power amplifier frequency range 1 output matching unit with
The input of frequency range 1 impedance transformer is connected, and auxiliary power amplifier frequency range 2 output matching unit is become with frequency range 2 impedance
The input of parallel operation is connected, and the outfan of frequency range 1 impedance transformer is connected with an input of pilot frequency combiner, frequency range
The outfan of 2 impedance transformers is connected with another input of pilot frequency combiner, the outfan output letter of pilot frequency combiner
Number to terminal unit.
By above-mentioned double frequency self-adapted high-efficient rate doherty circuit, the main power amplifier of double frequency doherty circuit and auxiliary power amplifier are defeated
Go out to fit through the high efficiency match circuit output of two different frequency ranges final combining output, thus it is efficient to obtain double frequency
Rate doherty.
Below in conjunction with the accompanying drawings the preferred embodiment of the present invention is illustrated.
Fig. 4 is double frequency high efficiency self adaptation doherty circuit structure block diagram according to the preferred embodiment of the invention, such as Fig. 4
Shown, this circuit includes:
Each port Impedance of pilot frequency combiner (is equivalent to above-mentioned in frequency range 1 (being equivalent to above-mentioned first frequency range) and frequency range 2
Second frequency range) place is 50 ohm；
Preferably, frequency range 1 is 1805mhz to 1845mhz, and frequency range 2 is 2130mhz to 2170mhz；
Power amplification unit includes two power amplifiers, and wherein main power amplifier bias are put in ab class state, auxiliary
Big device is biased in c class state；
Self adaptation dividing network divides the signal of frequency range 1 to frequency range 1 output matching unit, and the signal of frequency range 2 is divided to frequency
Section 2 output matching units；
Self adaptation dividing network and main power amplifier frequency range 1 output matching unit (are equivalent to above-mentioned first match circuit
302) by main power tube at frequency range 1 power tube root impedance matching to 50 ohm, self adaptation dividing network and main power
Amplifier frequency range 2 output matching unit (being equivalent to above-mentioned 3rd match circuit 312) work(at frequency range 2 by main power tube
Put pipe root impedance matching to 50 ohm, self adaptation dividing network and auxiliary power amplifier frequency range 1 output matching unit
(being equivalent to above-mentioned second match circuit 304) by auxiliary power amplifier pipe at frequency range 1 power tube root impedance matching to 50
Ohm, self adaptation dividing network (is equivalent to the above-mentioned 4th and mates electricity with auxiliary power amplifier frequency range 2 output matching unit
Road 314) by auxiliary power amplifier pipe at frequency range 2 power tube root impedance matching to 50 ohm；
Frequency range 1 impedance inverted device (being equivalent to above-mentioned quarter-wave microstrip line 306), frequency range 1 impedance transformer (phase
When in above-mentioned first characteristic impedance 308), wherein, the characteristic impedance of frequency range 1 impedance inverted device is 50 ohm, frequency range 1
The characteristic impedance of impedance transformer is 35 ohm；
Frequency range 2 impedance inverted device (being equivalent to above-mentioned quarter-wave microstrip line 316), frequency range 2 impedance transformer (phase
When in above-mentioned second characteristic impedance 318), wherein, the characteristic impedance of frequency range 2 impedance inverted device is 50 ohm, frequency range 2
The characteristic impedance of impedance transformer is 35 ohm；
Power combiner adopts pilot frequency combiner, and each port input impedance at frequency range 1 and frequency range 2 for the pilot frequency combiner is
50 ohm.
In sum, by the above embodiment of the present invention and preferred embodiment, increased a kind of doherty power amplifier newly,
Due to an output matching unit of traditional doherty power amplifier being changed into the output matching unit of two different frequency ranges,
Thus obtaining the high efficiency that doherty amplifies for simple signal, equally there is higher efficiency simultaneously for two-frequency signal,
Improve the efficiency when two-frequency signal amplifies for the doherty.
Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be with general
Realizing, they can concentrate on single computing device computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the executable program code of computing device, it is thus possible to by they
Storage to be executed by computing device in the storage device, and in some cases, can be to hold different from order herein
The shown or described step of row, or they are fabricated to respectively each integrated circuit modules, or will be many in them
Individual module or step are fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware
Combine with software.
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 (10)
1. a kind of doherty power amplifier, including main power amplifier and auxiliary power amplifier it is characterised in that also including:
First self adaptation dividing network, the second self adaptation dividing network, the first output matching circuit, the second output matching electricity
Road and pilot frequency combiner, wherein,
The outfan of described first self adaptation dividing network input, the institute with described first output matching circuit respectively
The input stating the second output matching circuit connects, and described first self adaptation dividing network is used for putting in described main power
It respectively is isolated by signal and second frequency range of the first frequency range in the output signal of big device and described auxiliary power amplifier
Signal, and be respectively fed to described first output matching circuit and described second output matching circuit process, wherein,
Described first output matching circuit is used for mating described first frequency range, and described second output matching circuit is used for mating institute
State the second frequency range；
The outfan of described second self adaptation dividing network input, the institute with described first output matching circuit respectively
The input stating the second output matching circuit connects, and described second self adaptation dividing network is used for putting in described main power
It respectively is isolated by signal and second frequency range of the first frequency range in the output signal of big device and described auxiliary power amplifier
Signal, and be respectively fed to described first output matching circuit and described second output matching circuit process；
The input of described pilot frequency combiner respectively with the outfan of described first output matching circuit, described second defeated
The outfan going out match circuit connects, for by described first output matching circuit and described second output matching circuit
Output signal combining and export.
2. doherty power amplifier according to claim 1 it is characterised in that
Described first output matching circuit includes: the first match circuit being connected with described main power amplifier, and with
The second match circuit that described auxiliary power amplifier connects, wherein, described first match circuit is through a quarter
Wave microstrip line is combined with described second match circuit, described first match circuit and described second match circuit
Combining end pass sequentially through the quarter-wave microstrip line of the first characteristic impedance and the microstrip transmission line of the first impedance
It is connected with described pilot frequency combiner；
Described second output matching circuit includes: the 3rd match circuit being connected with described main power amplifier, and with
The 4th match circuit that described auxiliary power amplifier connects, wherein, described 3rd match circuit is through a quarter
Wave microstrip line is combined with described 4th match circuit, described 3rd match circuit and described 4th match circuit
Combining end pass sequentially through the quarter-wave microstrip line of the second characteristic impedance and the microstrip transmission line of the second impedance
It is connected with described pilot frequency combiner.
3. doherty power amplifier according to claim 2 it is characterised in that
Described first characteristic impedance is 35 ohm；Described first impedance is 50 ohm.
4. circuit according to claim 3 it is characterised in that
The power tube root impedance at described first frequency range of described main power amplifier is matched as 50 ohm；
The power tube root impedance at described first frequency range of described auxiliary power amplifier is matched as 50 ohm.
5. doherty power amplifier according to claim 3 it is characterised in that
The input resistance of the input of the described pilot frequency combiner being connected with the outfan of described first output matching circuit
Resist for 50 ohm.
6. doherty power amplifier according to claim 2 it is characterised in that
Described second characteristic impedance is 35 ohm；Described second impedance is 50 ohm.
7. doherty power amplifier according to claim 6 it is characterised in that
The power tube root impedance at described second frequency range of described main power amplifier is matched as 50 ohm；
The power tube root impedance at described second frequency range of described auxiliary power amplifier is matched as 50 ohm.
8. doherty power amplifier according to claim 6 it is characterised in that
The input resistance of the input of the described pilot frequency combiner being connected with the outfan of described second output matching circuit
Resist for 50 ohm.
9. doherty power amplifier according to any one of claim 1 to 8 it is characterised in that
Described first frequency range is 1805mhz to 1845mhz；Described second frequency range is 2130mhz to 2170mhz.
10. doherty power amplifier according to any one of claim 1 to 8 it is characterised in that
Described main power amplifier bias are in ab class state；
Described auxiliary power amplifier is biased in c class state.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510412287.3A CN106357222A (en) | 2015-07-14 | 2015-07-14 | Doherty power amplifier circuit |
| PCT/CN2016/074726 WO2017008512A1 (en) | 2015-07-14 | 2016-02-26 | Doherty power amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510412287.3A CN106357222A (en) | 2015-07-14 | 2015-07-14 | Doherty power amplifier circuit |
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| CN106357222A true CN106357222A (en) | 2017-01-25 |
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| CN201510412287.3A Pending CN106357222A (en) | 2015-07-14 | 2015-07-14 | Doherty power amplifier circuit |
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| WO (1) | WO2017008512A1 (en) |
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| WO2018205237A1 (en) * | 2017-05-12 | 2018-11-15 | 清华大学 | Single-frequency line-based millimeter wave dual-band doherty power amplifier |
| CN111480292A (en) * | 2017-10-02 | 2020-07-31 | 镁可微波技术有限公司 | No-load modulation high-efficiency power amplifier |
| US11705869B2 (en) | 2018-10-05 | 2023-07-18 | Macom Technology Solutions Holdings, Inc. | Low-load-modulation power amplifier |
| US11722101B2 (en) | 2017-02-02 | 2023-08-08 | Macom Technology Solutions Holdings, Inc. | 90-degree lumped and distributed Doherty impedance inverter |
| US11811366B2 (en) | 2017-04-24 | 2023-11-07 | Macom Technology Solutions Holdings, Inc. | Symmetrical Doherty power amplifier having improved efficiency |
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| US11888448B2 (en) | 2019-12-30 | 2024-01-30 | Macom Technology Solutions Holdings, Inc. | Low-load-modulation broadband amplifier |
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- 2015-07-14 CN CN201510412287.3A patent/CN106357222A/en active Pending
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2016
- 2016-02-26 WO PCT/CN2016/074726 patent/WO2017008512A1/en active Application Filing
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11722101B2 (en) | 2017-02-02 | 2023-08-08 | Macom Technology Solutions Holdings, Inc. | 90-degree lumped and distributed Doherty impedance inverter |
| US11811366B2 (en) | 2017-04-24 | 2023-11-07 | Macom Technology Solutions Holdings, Inc. | Symmetrical Doherty power amplifier having improved efficiency |
| US11843352B2 (en) | 2017-04-24 | 2023-12-12 | Macom Technology Solutions Holdings, Inc. | Inverted Doherty power amplifier with large RF and instantaneous bandwidths |
| WO2018205237A1 (en) * | 2017-05-12 | 2018-11-15 | 清华大学 | Single-frequency line-based millimeter wave dual-band doherty power amplifier |
| CN111480292A (en) * | 2017-10-02 | 2020-07-31 | 镁可微波技术有限公司 | No-load modulation high-efficiency power amplifier |
| US11716058B2 (en) | 2017-10-02 | 2023-08-01 | Macom Technology Solutions Holdings, Inc. | No-load-modulation, high-efficiency power amplifier |
| CN111480292B (en) * | 2017-10-02 | 2024-03-29 | 镁可微波技术有限公司 | No-load modulation high-efficiency power amplifier |
| CN108712152A (en) * | 2018-07-24 | 2018-10-26 | 成都嘉纳海威科技有限责任公司 | A kind of high efficiency Darlington tube core based on varactor Adaptive matching technology |
| CN108712152B (en) * | 2018-07-24 | 2024-02-27 | 成都嘉纳海威科技有限责任公司 | High-efficiency composite transistor core based on varactor self-adaptive matching technology |
| US11705869B2 (en) | 2018-10-05 | 2023-07-18 | Macom Technology Solutions Holdings, Inc. | Low-load-modulation power amplifier |
| US11888448B2 (en) | 2019-12-30 | 2024-01-30 | Macom Technology Solutions Holdings, Inc. | Low-load-modulation broadband amplifier |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017008512A1 (en) | 2017-01-19 |
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