CN203151433U - Double-frequency synchronous power amplifier based on T-type network and coupling line - Google Patents
Double-frequency synchronous power amplifier based on T-type network and coupling line Download PDFInfo
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- CN203151433U CN203151433U CN201220472136.9U CN201220472136U CN203151433U CN 203151433 U CN203151433 U CN 203151433U CN 201220472136 U CN201220472136 U CN 201220472136U CN 203151433 U CN203151433 U CN 203151433U
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The utility model discloses a double-frequency synchronous power amplifier based on T-type network and a coupling line, which belongs to power amplifier design field of wireless communication technology. The double-frequency synchronous power amplifier based on the T-type network and the coupling line is provided with a double-path or multi-path double-frequency Doherty power amplifier. A double-frequency main power amplifier and a double-frequency auxiliary power amplifier are connected with a double-frequency double-path power amplifier+90 DEG phase difference output power divider module. A double-frequency directional coupler or double-frequency double-path powder divider+90 DEG phase difference output power divider module is connected with the input end. The double-frequency main power amplifier and the double-frequency auxiliary power amplifier are respectively connected with a main double-frequency delay line and an auxiliary double-frequency delay line. The double-frequency synchronous power amplifier can operate on two random frequency bands in a double-frequency synchronous mode, and efficiency increase can be realized on different frequency bands. The performance of the double-frequency Doherty on single frequency band is same with that of the traditional Doherty power amplifier. The efficiency of the small power area can be improved, and high efficiency is kept in a large power area.
Description
Technical field
The utility model belongs to the Designing power amplifier field of wireless communication technology.Be particularly related to a kind of double frequency synchronous mode power amplifier based on T type network and coupling line.In particular for a kind of synchronous mode power amplifier of supporting two-band in multiband, the mobile communication base station final stage radio frequency output efficiently.
Background technology
In order to realize the new concept of " green " communication, high efficiency power amplifier is just receiving increasing the concern and attention.There are several technology can reach high efficiency purpose at present.A few thing pattern such as E class, F class power amplifier can reach very high drain efficiency, and perfect condition is issued to 100% drain efficiency, and is poor but the shortcoming of this class power amplifier is the linearity.The Doherty(Doherty) power amplifier of structure has higher efficient (with respect to class ab ammplifier) and the better linearity (with respect to the C class A amplifier A) concurrently, is widely used in the middle of the radio communication base station at present.But because its design feature, bandwidth is restricted, and can't satisfy the requirement of broadband system.The basic principle of Doherty circuit is that the average portion of input signal and peak value are partly separately amplified, and is synthetic then, thereby obtains high efficiency.Because the active load pulling figure of Doherty structure makes power amplifier to guarantee greater efficiency in the scope of certain back-off, satisfies the amplification demand of different peak-to-average force ratio modulation signals.Digital pre-distortion technology combines with the Doherty power amplifier, can realize high efficiency, high Linear Power Amplifier.
Along with technical development, future mobile communication system need be supported different standards simultaneously, and this just requires the base station transmitter terminal can handle the signal of different frequency simultaneously, so the power amplifier of multiband work will obtain very big application.In order to realize multiband work, the method for some design power amplifiers is suggested.Wherein have a class power amplifier to realize multiple-frequency operation with power amplifier in parallel, each power amplifier is adjusted to the single-frequency optimum Working, uses switch to select suitable power amplifier to handle the signal of different frequency when needing.The method for designing of this class power amplifier is simple, but cost is very high, and can not handle multiple-frequency signal simultaneously.An other class power amplifier uses reconfigurable laod network to realize multiple-frequency operation, comprise some adjustable elements in the laod network of this class power amplifier, as MEMS (micro electro mechanical system), varicap etc., change the laod network parameter by these elements of voltage control, make it realize optimum Working in a certain frequency.The voltage control of this class power amplifier is difficult, and can not handle multiple-frequency signal simultaneously.The 3rd class power amplifier uses the multiband open network to realize multiple-frequency operation, and the design more complicated of this class power amplifier, advantage are that it can handle multiple-frequency signal simultaneously.
Traditional Doherty power amplifier adds one section quarter-wave transmission line, a main power amplifier, an auxilliary power amplifier, two sections delay lines, one section quarter-wave transmission line by a power splitter and forms, because these element can only be operated under the frequency, so traditional Doherty power amplifier can only be operated on the single frequency band.
At present, based on some double frequency structures, some passive devices can be realized the double frequency synchronous working.In some articles, a kind of T type network is used to realize the directional coupler of double frequency, and this directional coupler is identical with traditional directional coupling structure, and difference is that the quarter-wave transmission line of wherein every section is replaced by T type network.This T type network comprises two sections series transmission lines and one section branch line that places the centre, and branch line can be shorted to ground, also can open a way.This directional coupler can be implemented under any two different frequencies, and input power is distributed to two output ports and adds 90 ° phase difference.In some articles, coupling line is used to realize the Wilkinson(Wilkinson of two-frequency operation) power splitter, coupling line can be single-unit also can be binodal.The function of coupling line is the quarter-wave transmission line that has replaced in traditional Wilkinson power splitter, all demonstrates quarter-wave phase-delay characteristic under two different frequencies.It is very big that the characteristics of using T type network are that its frequency specific energy is done, and shortcoming is that its size is bigger, and when frequency ratio was bigger, wherein branch line may very thin (terminal open circuit) or very thick (terminal short circuit).The characteristics of coupling line are that size is smaller, and shortcoming is that its frequency ratio scope is less, and after parameter was set correctly, T type network or coupling line can both equivalence be the transmission line of one section double frequency
The utility model content
The purpose of this utility model is to provide a kind of double frequency synchronous mode power amplifier based on T type network and coupling line at the deficiencies in the prior art, it is characterized in that, described double frequency synchronous mode power amplifier based on T type network and coupling line has two-way or multichannel double frequency Doherty power amplifier, comprises two kinds of structures: a kind of is that a double frequency master power amplifier and a double frequency auxiliary power amplifier are connected to the power splitter module that double frequency two-way power splitter adds 90 ° of phase difference outputs respectively; The power splitter module that double-frequency directional coupler or double frequency two-way power splitter add 90 ° of phase difference outputs is connected with input, double frequency master power amplifier is connected with auxilliary double frequency delay line with main double frequency delay line respectively with the double frequency auxiliary power amplifier, main double frequency delay line is connected with first section double frequency quarter-wave transmission line, first section double frequency quarter-wave transmission line and auxilliary double frequency delay line and the second double frequency quarter-wave transmission line link together, and second section double frequency quarter-wave transmission line connects output; To be a double frequency master power amplifier be connected with the power splitter module that double frequency two-way power splitter adds 90 ° of phase differences outputs respectively with first double frequency auxiliary power amplifier to the N double frequency auxiliary power amplifier another kind; Double frequency master power amplifier is connected with main double frequency delay line, main double frequency delay line is connected with first section double frequency quarter-wave transmission line, first double frequency auxiliary power amplifier to the N double frequency auxiliary power amplifier is connected with first double frequency delay line to the N double frequency delay line accordingly, first double frequency delay line to the N double frequency delay line common node is connected with the common node of first section double frequency quarter-wave transmission line and second section double frequency quarter-wave transmission line again, and second section double frequency quarter-wave transmission line connects output.
Described N is 1-20.
The characteristic impedance of described first section double frequency quarter-wave transmission line is 50 Ω, and the characteristic impedance of second section double frequency quarter-wave transmission line is 35 Ω.
Describedly comprise the quarter-wave transmission line of two-frequency operation and the delay line of two-frequency operation based on T type network and coupling line; T type network is made up of the double frequency quarter-wave transmission line, and is connected on the signal transmission road; Wherein, double-frequency directional coupler is made up of four sections double frequency quarter-wave transmission lines, and wherein two sections double frequency quarter-wave transmission line has
Characteristic impedance, about two sections double frequency quarter-wave transmission lines have the characteristic impedance of 50 Ω; Epimere double frequency quarter-wave transmission line two ends connect input, output port; About two sections be connected with two sections respectively, four sections double frequency quarter-wave transmission lines are formed a loop; Double frequency Wilkinson power splitter is made up of three sections double frequency quarter-wave transmission lines, wherein, is made of two double frequency quarter-wave transmission lines and 100 Ω resistance, and two double frequency quarter-wave transmission lines have equivalence
Characteristic impedance and the quarter-wave transmission line equivalent electric length of the characteristic impedance of 50 Ω.
Described coupling line is single-unit coupling line or two joint coupling lines.
Described double frequency Doherty power amplifier contains power splitter module, a double frequency master power amplifier, a double frequency auxiliary power amplifier, two sections double frequency delay lines that one section double-frequency directional coupler or double-frequency directional coupler or double frequency two-way power splitter add 90 ° of phase difference outputs, and two sections characteristic impedances are respectively the double frequency quarter-wave impedance transformation line of 50 Ω and 35 Ω; Wherein, double-frequency directional coupler is made up of 4 T type networks, and wherein two T type networks have equivalence up and down
Characteristic impedance, about two T type networks have the characteristic impedance of 50 Ω, the equivalent electric length of four T type networks on two frequencies is quarter-wave, and double frequency Wilkinson power splitter is made of two coupling lines and 100 Ω resistance, and two coupling lines have equivalence
Characteristic impedance and quarter-wave equivalent electric length; Double frequency master power amplifier has identical topological structure with auxiliary power amplifier, its laod network is made up of a T type network and one section open-circuit line in parallel, can standard termination be transformed to required impedance two frequencies, fan-in network is a pi type network, can realize two conjugate impedance match on the frequency; Double frequency quarter-wave transmission line or delay line can be used T type network or coupling line equivalence, and wherein the branch line in the T type network can be short circuit or open-circuit line, and coupling line can use the coupling line of single-unit or binodal.
Described double frequency quarter-wave transmission line or double frequency delay line are the T type network of single-unit coupling line, binodal coupling line, band short circuit branch line or the T type network of band open circuit branch line.
Described dual-frequency power divider adds 90 ° of phase difference output modules by double-frequency directional coupler, and perhaps double frequency Wilkinson power splitter adds the realization of double frequency quarter-wave transmission line; Double-frequency directional coupler and double frequency Wilkinson power splitter are to be made of the double frequency quarter-wave transmission line.
The beneficial effects of the utility model are that this power amplifier can be operated on any two kinds of frequency ranges simultaneously, and double frequency Doherty power amplifier of the present invention can be handled the signal of two kinds of different frequencies simultaneously, all raisings of energy implementation efficiency on different frequency bands.The performance of double frequency Doherty on single frequency band is identical with traditional Doherty power amplifier, can improve the efficient in small-power district, keeps high efficiency in high-power district, and when amplifying the bigger signal of peak-to-average force ratio, the efficient of power amplifier is high more a lot of than common power amplifier.When double frequency Doherty power amplifier is worked simultaneously two frequency ranges, because the influence of intermodulation can make the linearity of power amplifier descend to some extent, can improve the linearity of this power amplifier by pre-distortion technology.
Description of drawings
Fig. 1 designs a model for double frequency two-way Doherty power amplifier.
Fig. 2 designs a model for double-frequency multi-path Doherty power amplifier.
Fig. 3 (a) is the equivalent model of double frequency transmission line, and Fig. 3 (b) is the single-unit coupling line, and Fig. 3 (c) is the binodal coupling line, and Fig. 3 (d) is the T type network of band short circuit branch line, and Fig. 3 (e) is the T type network of band open circuit branch line.
Fig. 4 (a) is double-frequency directional coupler, and Fig. 4 (b) adds the quarter-wave delay line module for double frequency Wilkinson power splitter.
Fig. 5 is double frequency single channel power amplifier
Embodiment
A kind of double frequency synchronous mode power amplifier based on T type network and coupling line at first needs to determine the structural model of double frequency Doherty power amplifier, traditional Doherty power amplifier is the two-way model, developed afterwards and the multichannel model, the double frequency Doherty power amplifier model that the present invention proposes also is divided into two-way and multichannel model.Be illustrated in figure 1 as a double frequency two-way Doherty power amplifier model, its structure is the same with traditional single-frequency two-way Doherty power amplifier, and concrete structure is that a double frequency master power amplifier and a double frequency auxiliary power amplifier are connected to the power splitter module that double frequency two-way power splitter adds 90 ° of phase difference outputs respectively; The power splitter module that double-frequency directional coupler or double frequency two-way power splitter add 90 ° of phase difference outputs is connected with input, double frequency master power amplifier is connected with auxilliary double frequency delay line with main double frequency delay line respectively with the double frequency auxiliary power amplifier, main double frequency delay line is connected with first section double frequency quarter-wave transmission line, first section double frequency quarter-wave transmission line and auxilliary double frequency delay line and the second double frequency quarter-wave transmission line link together, and second section double frequency quarter-wave transmission line connects output; Wherein each element is the double frequency model, double frequency transmission line (delay line and quarter-wave transmission line).Double frequency two-way power division and 90 ° of phase difference output modules can be used directional coupler, and also available Wilkinson merit branch adds 90 ° of delay lines realizations.Fig. 2 is a multichannel double frequency Doherty power amplifier model, and different with the two-way model is that it contains a plurality of auxiliary power amplifiers, so its prime needs a multi-path power divider that power division is arrived each power amplifier.Three road power splitters can realize independently that the power splitter more than three tunnel can divide cascade to realize with a plurality of merits.To be a double frequency master power amplifier be connected with the power splitter module that double frequency two-way power splitter adds 90 ° of phase differences outputs respectively with first double frequency auxiliary power amplifier to the N double frequency auxiliary power amplifier concrete structure; Double frequency master power amplifier is connected with main double frequency delay line, main double frequency delay line is connected with first section double frequency quarter-wave transmission line, first double frequency auxiliary power amplifier to the N double frequency auxiliary power amplifier is connected with first double frequency delay line to the N double frequency delay line accordingly, first double frequency delay line to the N double frequency delay line common node is connected with the common node of first section double frequency quarter-wave transmission line and second section double frequency quarter-wave transmission line again, and second section double frequency quarter-wave transmission line connects output.
The equivalent model of the double frequency transmission line of double frequency transmission line shown in Fig. 3 (a) in the design double frequency Doherty power amplifier, this transmission line of designing requirement realizes that synchronous working is in frequency f
1And f
2Condition be: this transmission line can equivalence be one section normal transmission line, has Z in first frequency
C1Equivalent characteristic impedance and θ
1Equivalent electric length, have Z second frequency
C2Equivalent characteristic impedance and θ
2Equivalent electric length.Coupling line and T type network all have this specific character.Fig. 3 (b) is the single-unit coupled line structure, and Fig. 3 (c) is the binodal coupled line structure, and Fig. 3 (d) is the T type network of band short circuit branch line, and Fig. 3 (e) is the T type network of band open circuit branch line.
In double frequency Doherty power amplifier model, prime needs a dual-frequency power divider and 90 ° of phase difference output modules.This module can realize with double-frequency directional coupler, shown in Fig. 4 (a); Also can add the double frequency quarter-wave transmission line with double frequency Wilkinson power splitter and realize, shown in Fig. 4 (b).Double-frequency directional coupler is made up of four sections double frequency quarter-wave transmission lines, and wherein two sections (being respectively the 3rd section double frequency quarter-wave transmission line and the 5th section double frequency quarter-wave transmission line) transmission line has
Characteristic impedance, about two sections (being respectively the 6th section double frequency quarter-wave transmission line and the 4th section double frequency quarter-wave transmission line) transmission lines have the characteristic impedance of 50 Ω.Double frequency Wilkinson power splitter comprises the resistance of three sections double frequency quarter-wave transmission lines and 100 Ω, and wherein two sections (being respectively the 3rd section double frequency quarter-wave transmission line and the 5th section double frequency quarter-wave transmission line) transmission lines have
Characteristic impedance; Another section is the 4th section double frequency quarter-wave transmission line with characteristic impedance of 50 Ω; Double frequency quarter-wave transmission line in these structures can be obtained the value of each parameter in coupling line or the T type network with coupling line or T type network according to given parameter.
In double frequency Doherty power amplifier, main power amplifier and auxilliary power amplifier are single channel double frequency power amplifier.The present invention uses a kind of single channel double frequency power amplifier as shown in Figure 5, and input matching network is п type structure, by optimizing the conjugate impedance match that can obtain two frequency places; Laod network comprises one section open circuited transmission line in parallel, and the T type network of a band short circuit branch line can transform to standard termination the optimum impedance that needs at two these networks of Frequency point.This power amplifier of dc offset voltage is set to AB class mode of operation (main power amplifier) or C class mode of operation (auxiliary power amplifier), and direct current supply voltage directly is connected to transistor drain by the short circuit branch line.
The double frequency transmission line has been arranged, dual-frequency power divider and double frequency single channel power amplifier, one double frequency two-way Doherty power amplifier or double-frequency multi-path Doherty power amplifier shown in Figure 2 just can be realized as shown in Figure 1.In emulation, by regulating the equivalent electric length of double frequency delay line, can optimize the optimum working performance that obtains the Doherty power amplifier.
The feasibility of checking double frequency Doherty power amplifier, use the double frequency 900MHz of SiC MESFET24010 designs and 2GHz based on T type network two-way Doherty power amplifier, the drain efficiency comparing result of measuring at high band shows, at peak power output rollback 9dB place, the drain efficiency of double frequency three road Doherty power amplifiers has improved 20% than the drain efficiency of balance amplifier.
Claims (7)
1. double frequency synchronous mode power amplifier based on T type network and coupling line, it is characterized in that, described double frequency synchronous mode power amplifier based on T type network and coupling line has two-way or multichannel double frequency Doherty power amplifier, comprises two kinds of structures: a kind of is that a double frequency master power amplifier and a double frequency auxiliary power amplifier are connected to the power splitter module that double frequency two-way power splitter adds 90 ° of phase difference outputs respectively; The power splitter module that double-frequency directional coupler or double frequency two-way power splitter add 90 ° of phase difference outputs is connected with input, double frequency master power amplifier is connected with auxilliary double frequency delay line with main double frequency delay line respectively with the double frequency auxiliary power amplifier, main double frequency delay line is connected with first section double frequency quarter-wave transmission line, first section double frequency quarter-wave transmission line and auxilliary double frequency delay line and the second double frequency quarter-wave transmission line link together, and second section double frequency quarter-wave transmission line connects output; To be a double frequency master power amplifier be connected with the power splitter module that double frequency two-way power splitter adds 90 ° of phase differences outputs respectively with first double frequency auxiliary power amplifier to the N double frequency auxiliary power amplifier another kind; Double frequency master power amplifier is connected with main double frequency delay line, main double frequency delay line is connected with first section double frequency quarter-wave transmission line, first double frequency auxiliary power amplifier to the N double frequency auxiliary power amplifier is connected with first double frequency delay line to the N double frequency delay line accordingly, first double frequency delay line to the N double frequency delay line common node is connected with the common node of first section double frequency quarter-wave transmission line and second section double frequency quarter-wave transmission line again, and second section double frequency quarter-wave transmission line connects output.
2. according to the described double frequency synchronous mode power amplifier based on T type network and coupling line of claim 1, it is characterized in that described N is 1-20.
3. according to the described double frequency synchronous mode power amplifier based on T type network and coupling line of claim 1, it is characterized in that, the characteristic impedance of described first section double frequency quarter-wave transmission line is 50 Ω, and the characteristic impedance of second section double frequency quarter-wave transmission line is 35 Ω.
4. according to the described double frequency synchronous mode power amplifier based on T type network and coupling line of claim 1, it is characterized in that, describedly comprise the quarter-wave transmission line of two-frequency operation and the delay line of two-frequency operation based on T type network and coupling line; T type network is made up of the double frequency quarter-wave transmission line, and is connected on the signal transmission road; Wherein, double-frequency directional coupler is made up of four sections double frequency quarter-wave transmission lines, and wherein two sections double frequency quarter-wave transmission line has
Characteristic impedance, about epimere two ends with characteristic impedance of 50 Ω of two sections double frequency quarter-wave transmission lines connect input, output port; About two sections be connected with two sections respectively, four sections double frequency quarter-wave transmission lines are formed a loop; Double frequency Wilkinson power splitter is made up of three sections double frequency quarter-wave transmission lines, wherein, is made of two double frequency quarter-wave transmission lines and 100 Ω resistance, and two double frequency quarter-wave transmission lines have equivalence
Characteristic impedance and the quarter-wave transmission line equivalent electric length of the characteristic impedance of 50 Ω; Described coupling line is single-unit coupling line or two joint coupling lines.
5. according to the described double frequency synchronous mode power amplifier based on T type network and coupling line of claim 1, it is characterized in that described double frequency quarter-wave transmission line or double frequency delay line are the T type network of single-unit coupling line, binodal coupling line, band short circuit branch line or the T type network of band open circuit branch line.
6. according to the described double frequency synchronous mode power amplifier based on T type network and coupling line of claim 1, it is characterized in that, described dual-frequency power divider adds 90 ° of phase difference output modules by double-frequency directional coupler, and perhaps double frequency Wilkinson power splitter adds the realization of double frequency quarter-wave transmission line; Double-frequency directional coupler and double frequency Wilkinson power splitter are to be made of the double frequency quarter-wave transmission line.
7. according to the described double frequency synchronous mode power amplifier based on T type network and coupling line of claim 1, it is characterized in that, described double frequency Doherty power amplifier contains one section double-frequency directional coupler or double frequency two-way power splitter adds power splitter module, a double frequency master power amplifier, a double frequency auxiliary power amplifier, two sections double frequency delay lines that 90 ° of phase differences are exported, and two sections characteristic impedances are respectively the double frequency quarter-wave impedance transformation line of 50 Ω and 35 Ω; Wherein, double-frequency directional coupler is made up of 4 T type networks, and wherein two T type networks have equivalence up and down
Characteristic impedance, about two T type networks have the characteristic impedance of 50 Ω, the equivalent electric length of four T type networks on two frequencies is quarter-wave; Double frequency Wilkinson power splitter is made of two coupling lines and 100 Ω resistance, and two coupling lines have equivalence
Characteristic impedance and quarter-wave equivalent electric length, double frequency master power amplifier has identical topological structure with auxiliary power amplifier, its laod network is made up of a T type network and one section open-circuit line in parallel, can standard termination be transformed to required impedance two frequencies, fan-in network is a pi type network, can realize two conjugate impedance match on the frequency; Double frequency quarter-wave transmission line or delay line can be used T type network or coupling line equivalence, and wherein the branch line in the T type network can be short circuit or open-circuit line, and coupling line can use the coupling line of single-unit or binodal.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015117506A1 (en) * | 2014-08-21 | 2015-08-13 | 中兴通讯股份有限公司 | Signal amplification device and method, base station and system |
| CN107493075A (en) * | 2016-06-09 | 2017-12-19 | 恩智浦美国有限公司 | Doherty amplifier with minimum phase output network |
| CN110932743A (en) * | 2018-09-17 | 2020-03-27 | 天津大学青岛海洋技术研究院 | Vital sign Doppler radar circuit structure with double-frequency isolation effect |
| 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 |
| CN117674747A (en) * | 2024-01-31 | 2024-03-08 | 苏州悉芯射频微电子有限公司 | High-linearity high-efficiency non-pair Doherty power amplifier |
-
2012
- 2012-09-14 CN CN201220472136.9U patent/CN203151433U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015117506A1 (en) * | 2014-08-21 | 2015-08-13 | 中兴通讯股份有限公司 | Signal amplification device and method, base station and system |
| CN105375891A (en) * | 2014-08-21 | 2016-03-02 | 中兴通讯股份有限公司 | Signal amplification device and method, base station and system |
| CN107493075A (en) * | 2016-06-09 | 2017-12-19 | 恩智浦美国有限公司 | Doherty amplifier with minimum phase output network |
| CN107493075B (en) * | 2016-06-09 | 2023-01-31 | 恩智浦美国有限公司 | Doherty amplifier with minimum phase output network |
| CN110932743A (en) * | 2018-09-17 | 2020-03-27 | 天津大学青岛海洋技术研究院 | Vital sign Doppler radar circuit structure with double-frequency isolation effect |
| 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 |
| CN111641390B (en) * | 2020-06-15 | 2023-06-02 | 重庆邮电大学 | High-efficiency Doherty power amplifier based on T-PI (T-PI) combining network and design method |
| CN117674747A (en) * | 2024-01-31 | 2024-03-08 | 苏州悉芯射频微电子有限公司 | High-linearity high-efficiency non-pair Doherty power amplifier |
| CN117674747B (en) * | 2024-01-31 | 2024-04-12 | 苏州悉芯射频微电子有限公司 | High-linearity high-efficiency non-pair Doherty power amplifier |
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Granted publication date: 20130821 |