CN109450383A - A kind of broadband dual-frequency section Doherty power amplifier based on phase delay double frequency output matching network - Google Patents
A kind of broadband dual-frequency section Doherty power amplifier based on phase delay double frequency output matching network Download PDFInfo
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- CN109450383A CN109450383A CN201811426440.8A CN201811426440A CN109450383A CN 109450383 A CN109450383 A CN 109450383A CN 201811426440 A CN201811426440 A CN 201811426440A CN 109450383 A CN109450383 A CN 109450383A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0288—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/42—Modifications of amplifiers to extend the bandwidth
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Abstract
The invention discloses a kind of broadband dual-frequency section Doherty power amplifiers based on phase delay double frequency output matching network, including broadband power divider, carrier wave amplifying circuit, peak value amplifying circuit, the carrier wave double frequency output matching network based on phase delay, the peak value double frequency output matching network based on phase delay.The upper road signal and lower road signal of broadband power divider are separately connected carrier wave amplifying circuit and peak value amplifying circuit；Carrier wave amplifying circuit is composed in series by carrier phase compensating line, carrier wave input matching network, carrier transis；Peak value amplifying circuit is composed in series by peak phase compensating line, peak value input matching network, peak transistor；Carrier wave amplifying circuit connects the carrier wave double frequency output matching network based on phase delay；Peak value amplifying circuit connects the peak value double frequency output matching network based on phase delay.The present invention realizes the dual band operation ability of Doherty power amplifier using phase cycling repeatability, designs carrier wave and peak value double frequency output matching network using stepped impedance structure.
Description
Technical field
The present invention relates to fields of communication technology, and in particular to a kind of broadband based on phase delay double frequency output matching network
Two-band Doherty power amplifier.
Background technique
People have pushed the continuous development of modern wireless communication systems to the raising of wireless communication rate and quality requirement, lead to
Letter system needs to be compatible with more and more communication standards.On the one hand, in order to improve transmission rate, communication system generally uses orthogonal
The modulation system of the spectral efficients such as frequency division multiplexing (OFDM), so that the peak-to-average force ratio of modulated signal significantly improves.In order to guarantee to be
The linearity of system, power amplifier need work in the power points far from saturation state, result in the drop of efficiency power amplifier
It is low；On the other hand, communication standard increase so that the interval of working frequency is increasing in addition certain frequencies between at a distance of several
Octave.In view of the volume of operation cost and equipment itself, there is an urgent need to can support the function of the even more frequency ranges of double frequency
Rate amplifier.Meanwhile requirement of the communication standard newly introduced to modulation signal bandwidth is also higher and higher, single working frequency range needs
Support the bandwidth of operation of tens of million or even up to a hundred megahertzs.Therefore, in the case where guaranteeing high rollback efficiency, realize double frequency or
Broadband operation also becomes the important issue of Power amplifier de-signers.
Currently, industry and academia generally use Doherty power amplifier structure to enhance power amplifier big
Efficiency when rollback power.The method that traditional Doherty power amplifier realizes two-frequency operation utilizes T shape or π shape structure
Two-band impedance transformer network realizes, as shown in Figure 1.Both structures are by transmission line middle-end or transmission line two
The mode of end load open circuit or short-circuit micro-band branch, destroys the original linear phase characteristic of transmission line, may finally realize
The equivalent quarter-wave impedance transformation line at different characteristic impedance, this method can effectively realize arbitrarily under two frequency ranges
The impedance matching of two frequencies.However by existing traditional double frequency Doherty power amplifier the study found that such T shape
Or π shape impedance transformer network limits power amplifier in the bandwidth of operation of each frequency range, bandwidth of operation is usually less than
100MHz.In recent years, there is research on the basis of theory analysis compensation phase of line operating frequency influences multiple for power amplifier,
Devise three frequency ranges even four frequency range Doherty power amplifiers.But it due to the effect of dispersion of transmission line, additionally introduces
Compensating line limits the bandwidth of each working frequency range amplifier, and the bandwidth of operation realized is still less than 150MHz.Therefore, although
Two-band even multiband Doherty power amplifier has been verified, and still, how to extend the bandwidth of each working frequency range
It is still a huge challenge.In future broadband wireless communication systems, with being continuously increased for modulated signal bandwidth, this challenge
It will become more prominent.
In conclusion by the research based on T shape or traditional two-band Doherty power amplifier of π shape structure
Show that existing two-band Doherty power amplifier technology has the limitation to bandwidth of operation in each frequency band, it is difficult to meet not
Come that the diversification of communication standards, working frequency range are discontinuous etc. to be required, while being also difficult to meet people to the big bandwidth of high-speed
Urgent need.Therefore, a kind of broadband dual-frequency section based on phase delay double frequency output matching network proposed by the present invention
Doherty power amplifier all has highly important research for realizing dual band operation and expanding bandwidth of operation these two aspects
Value and significance.
Summary of the invention
The object of the present invention is to provide a kind of broadband dual-frequency section Doherty based on phase delay double frequency output matching network
Power amplifier, to realize optimum impedance under the saturation and rollback state in two frequency ranges in broadband, to realize
Normal work of the Doherty power amplifier in two frequency ranges simultaneously expands the bandwidth of operation in each frequency band.
In order to solve the above technical problems, the specific technical solution that the present invention uses is as follows:
A kind of broadband dual-frequency section Doherty power amplifier based on phase delay double frequency output matching network, including width
With power splitter, carrier wave amplifying circuit, the carrier wave double frequency output matching network based on phase delay, peak value amplifying circuit and it is based on
The peak value double frequency output matching network of phase delay；The upper road signal and lower road signal output end of the broadband power divider respectively with
Carrier wave amplifying circuit is connected with the input terminal of peak value amplifying circuit；The output end of the carrier wave amplifying circuit is directly and based on phase
The input terminal of the carrier wave double frequency output matching network of delay is connected；The output end of the peak value amplifying circuit is directly and based on phase
The input terminal of the peak value double frequency output matching network of delay is connected；The carrier wave amplifying circuit is by carrier phase compensating line, carrier wave
Input matching network, carrier transis are sequentially connected in series composition；The peak value amplifying circuit is by peak phase compensating line, peak value
Input matching network, peak transistor are sequentially connected in series composition.
Energy is partially distributed to carrier wave amplifying circuit and peak value amplifying circuit by the broadband power divider.
Carrier phase is equipped between the broadband power divider and carrier wave input matching network and peak value input matching network to mend
Line and peak phase compensating line are repaid, Shang Lu and lower road signal phase difference is adjusted respectively, makes two paths of signals in Doherty power amplification
(i.e. signal is combined point A in Fig. 2) phase is identical at the output of device.
The carrier transis is AB power-like amplifier, and peak transistor is C power-like amplifier, and the two has identical
Saturation output power.
The carrier wave double frequency output matching network based on phase delay includes carrier wave output first transmission line, carrier wave output
Second transmission line, wherein the signal input part of carrier wave output first transmission line is connected with the drain electrode of carrier transis.
The peak value double frequency output matching network based on phase delay includes peak value output first transmission line, peak value output
Second transmission line, peak value output third transmission line, peak value export the 4th transmission line.Wherein, the letter of peak value output first transmission line
Number input terminal is connected with the drain electrode of peak transistor.
The carrier wave double frequency output matching network based on phase delay can realize rollback and saturation in two frequency ranges
Required impedance matching under state.
The peak value double frequency output matching network based on phase delay can be when peak value amplifying circuit work two
High output impedance is realized in a frequency range, meets peak power amplifier open-circuit condition, guarantees Doherty power amplifier at two
Normal work in frequency range.
Compared with prior art, technical solution of the present invention has the advantages that
(1) present invention realizes extension compared to traditional two-band Doherty power amplifier technology in bandwidth.This hair
The bright phase ratio by adjusting between carrier wave and peak impedance matching network, extends and balances the band of two-band power amplifier
It is wide.
(2) present invention can be realized compared to traditional two-band Doherty power amplifier technology in wider frequency range
Higher rollback and saturation efficiency.
Detailed description of the invention
Fig. 1 is the structural block diagram of traditional two-band Doherty power amplifier.
Fig. 2 is a kind of broadband dual-frequency section Doherty power based on phase delay double frequency output matching network of the invention
The structural block diagram of amplifier.
Fig. 3 is the carrier wave double frequency output matching network structural block diagram used in the embodiment of the present invention based on phase delay.
Fig. 4 is the carrier wave double frequency output matching network input impedance and phase used in the embodiment of the present invention based on phase delay
Position is with frequency variation relation figure.
Fig. 5 is the peak value double frequency output matching network structural block diagram used in the embodiment of the present invention based on phase delay.
Fig. 6 is the peak value double frequency output matching network output impedance and phase used in the embodiment of the present invention based on phase delay
Bitmap.
Fig. 7 is output power, efficiency and gain diagram of the embodiment of the present invention in 2.2-2.7GHz frequency range.
Fig. 8 is output power, efficiency and gain diagram of the embodiment of the present invention in 3.1-3.4GHz frequency range.
Fig. 9 is that the embodiment of the present invention is retracting with efficiency under saturation state with frequency variation curve figure.
In figure: 10- broadband power divider, 20- carrier wave amplifying circuit, 201- carrier phase compensating line, the input of 202- carrier wave
Distribution network, 203- carrier transis, 30- carrier wave double frequency output matching network, 301- carrier wave based on phase delay export first
Transmission line, 302- carrier wave output second transmission line, 40- peak value amplifying circuit, 401- peak phase compensating line, the input of 402- peak value
Peak value double frequency output matching network based on phase delay of matching network, 403- peak transistor, 50-, 501- peak value output the
One transmission line, 502- peak value output second transmission line, 503- peak value output third transmission line, the 4th transmission of 504- peak value output
Line.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
With reference to the accompanying drawing, technical solution of the present invention is described in detail.
Fig. 1 show the structural block diagram of traditional two-band Doherty power amplifier.Input power is by dual-frequency power divider etc.
It is divided into road signal and lower road signal, after upper road signal and lower road signal are amplified by carrier amplifier and peak amplifier respectively,
It is connected by double frequency carrier compensation line and double frequency peak compensation line with double frequency load modulation network.But for traditional two-band
Doherty power amplifier realizes two-frequency operation, such knot using the two-band impedance transformer network of T shape or π shape structure
Structure limits power amplifier in the bandwidth of operation of each frequency range.
Fig. 2 show a kind of broadband dual-frequency section Doherty based on phase delay double frequency output matching network of the invention
Power amplifier, including broadband power divider 10, carrier wave amplifying circuit 20, the carrier wave double frequency output matching network based on phase delay
30, peak value amplifying circuit 40 and the peak value double frequency output matching network 50 based on phase delay；The broadband power divider 10
Upper road signal and lower road signal output end are connect with the input terminal of carrier wave amplifying circuit 20 and peak value amplifying circuit 40 respectively；It is described
The output end of carrier wave amplifying circuit 20 is directly connected with the input terminal of the carrier wave double frequency output matching network 30 based on phase delay；
Input terminal of the output end of the peak value amplifying circuit 40 directly with the peak value double frequency output matching network 50 based on phase delay
It is connected；The carrier wave amplifying circuit 20 is by carrier phase compensating line 201, carrier wave input matching network 202, carrier transis 203
It is sequentially connected in series composition；The peak value amplifying circuit 40 is by peak phase compensating line 401, peak value input matching network 402, peak
Value transistor 403 is sequentially connected in series composition.
In above-mentioned Doherty power amplifier, energy is partially distributed to carrier wave amplification electricity by broadband power divider 10
Road 20 and peak value amplifying circuit 40.
In above-mentioned Doherty power amplifier, broadband power divider 10 and carrier wave input matching network 202 and peak value are defeated
Enter and be equipped with carrier phase compensating line 201 and peak phase compensating line 401 between matching network 402, adjusts Shang Lu and lower road respectively
Signal phase difference keeps two paths of signals phase at output identical.
In above-mentioned Doherty power amplifier, carrier transis 203 is AB power-like amplifier, peak transistor
403 be C power-like amplifier, the two saturation output power having the same.
In above-mentioned Doherty power amplifier, the carrier wave double frequency output matching network 30 based on phase delay includes
Carrier wave exports first transmission line 301, carrier wave exports second transmission line 302, wherein the signal of carrier wave output first transmission line 301
Input terminal is connected with the drain electrode of carrier transis 203.
In above-mentioned Doherty power amplifier, the peak value double frequency output matching network 50 based on phase delay includes
Peak value exports first transmission line 501, peak value output second transmission line 502, peak value output third transmission line 503, peak value output the
Four transmission lines 504.Wherein, the signal input part of peak value output first transmission line 501 is connected with the drain electrode of peak transistor 403.
In above-mentioned Doherty power amplifier, the carrier wave double frequency output matching network 30 based on phase delay can be with
It realizes and retracts and required impedance matching under saturation state in two frequency ranges.
In above-mentioned Doherty power amplifier, the peak value double frequency output matching network 50 based on phase delay can be with
High output impedance is realized in two frequency ranges when peak value amplifying circuit does not work, and meets peak power amplifier open-circuit condition,
Guarantee normal work of the Doherty power amplifier in two frequency ranges.
The working principle of the invention is: the invention proposes a kind of broadbands based on phase delay double frequency output matching network
Two-band Doherty power amplifier, to realize normal work of the Doherty power amplifier on two different frequency ranges.One
Aspect, the carrier wave double frequency output matching network based on phase delay need to meet following impedance matching requirements: in 6dB back-off
At point, realizes twice of optimal load matching in low-power in two frequency ranges, be saturated Carrier Power Amplifier in advance, thus
Reach double frequency Doherty power amplifier in the high efficiency of back-off point.In the saturated condition, it realizes in two frequency ranges
Optimal load matching.On the other hand, it is to the impedance matching requirements of the peak value double frequency output matching network based on phase delay:
At 6dB back-off point, the peak value double frequency output matching network based on phase delay can realize high output in two frequency ranges
Impedance meets peak power amplifier open-circuit condition, guarantees normal work of the Doherty power amplifier in two frequency ranges.
At the same time, in the saturated condition, the optimal load matching in two frequency ranges is realized.
To reach above-mentioned impedance matching requirements, the phase theta of the carrier wave double frequency output matching network based on phase delaycIt needs
For 90 degree (or -90 degree), the phase theta of the peak value double frequency output matching network based on phase delaypIt needs for 180 degree.Due to phase
Position following frequency is that mechanical periodicity is presented, and same impedance matching network can obtain identical phase on the different periods and prolong
When, therefore when the phase of impedance matching network is in the different periods, i.e.,
θc=m*180 ° -90 ° (m=1,2,3 ...) (1)
θp=n*180 ° (n=1,2,3 ...) (2)
Wherein m and n is periodicity.Formula (1) and the ratio of (2) in different cycles are defined as phase ratio.Work as double frequency
When the working frequency ratio of Doherty power amplifier is equal to phase ratio, ideal double frequency is may be implemented in impedance matching network
Impedance matching needed for Doherty power amplifier.
So for double frequency Doherty amplifier, the ideal frequency ratio of carrier wave and peak value double-frequency power amplifier can be with
It indicates are as follows:
Wherein fc1, fc2, fp1And fp2It is the reference frequency of carrier wave and peak value double-frequency power amplifier in two frequency bands, θc2、
θc1、θp2、θp1It is the fixed phase of carrier wave and peak value double-frequency power amplifier in two frequency bands respectively.Periodicity m1, m2, n1And n2
For positive integer, and m2> m1, n2> n1。
Finally, because the phase deviation of carrier wave and peak value double frequency output matching network based on phase delay will have a direct impact on
The bandwidth of operation of double frequency Doherty power amplifier.In response to this problem, in the design of broadband dual-frequency Doherty power amplifier
In, the present invention is in order to minimize the influence of phase deviation, using the matching network of low order, by the phase of entire impedance matching network
Control is within the period 1.
One embodiment is enumerated below.
The two-band Doherty power amplifier working frequency range that the present embodiment is realized is 2.2-2.7GHz and 3.1-
3.4GHz, carrier transis 203 and peak transistor 403 are all made of the GaN HEMT power amplifier pipe of CREE company
CGH40010F.Carrier transis 203 is biased in AB class, and peak transistor 403 is biased in C class.The two of the output of broadband power divider 10
The power ratio of road signal is 1:1.
It includes carrying that Fig. 3, which show the carrier wave double frequency output matching network 30 used in the embodiment of the present invention based on phase delay,
Wave exports first transmission line 301, carrier wave exports second transmission line 302, wherein the signal that carrier wave exports first transmission line 301 is defeated
Enter end to be connected with the drain electrode of carrier transis 203.
Carrier wave double frequency output matching network input impedance and phase used in the embodiment of the present invention based on phase delay with
Frequency variation relation figure is as shown in Figure 4.The carrier wave double frequency output matching network is f in frequency0When, phase delay is -180 degree.
From the figure, it can be seen that when frequency is respectively 0.5f0And 1.5f0When, the phase delay difference of carrier wave double frequency output matching network
For -90 degree and 90 degree.It therefore, can be respectively 0.5f in frequency0And 1.5f0When, realize 2 in low-power in two frequency ranges
Times optimal load impedance (100 Ω), so as to meet the impedance matching requirements of double frequency Doherty power amplifier, makes carrier wave
Amplifying circuit is saturated in advance, reaches high efficiency of the double frequency Doherty power amplifier at back-off point.
Fig. 5 show the peak value double frequency output matching network 50 used in the embodiment of the present invention based on phase delay, including
Peak value exports first transmission line 501, peak value exports second transmission line 502, and peak value exports third transmission line 503, peak value output the
Four transmission lines 504.Wherein, the signal input part of peak value output first transmission line 501 is connected with the drain electrode of peak transistor 403.
Peak value double frequency output matching network output impedance and phase diagram used in the embodiment of the present invention based on phase delay
As shown in Figure 6.The peak value double frequency output matching network is f in frequency0When, phase delay is 0 degree (360 degree).It can be with from figure
See, when frequency is respectively 0.5f0And 1.5f0When, the phase delay of peak value double frequency output matching network is -180 degree.Therefore,
It can be in 0.45f0To 0.55f0And 1.45f0To 1.55f0High output impedance is realized in two frequency ranges, meets double frequency Doherty
The power amplifier condition that peak value amplifying circuit is opened a way in back-off.
Fig. 7 show output power, efficiency and gain diagram of the embodiment of the present invention in 2.2-2.7GHz frequency range.From figure
It can be seen that the average saturation power and efficiency in the frequency range are respectively 45dBm and 70% or so；At 6dB rollback point, put down
Equal efficiency has reached 55% or so, and gain is in 14dB or so.
Fig. 8 show output power, efficiency and gain diagram of the embodiment of the present invention in 3.1-3.4GHz frequency range.From figure
It can be seen that the average saturation power and efficiency in the frequency range are respectively 44dBm and 65% or so；At 6dB rollback point, put down
Equal efficiency has reached 47% or so, and gain is in 12dB or so.
Fig. 9 show the embodiment of the present invention and is retracting with efficiency under saturation state with frequency variation curve figure.It can from figure
To see, for saturation state, working band and inoperative frequency band internal efficiency are not obvious with the variation of frequency.But for
Rollback state, efficiency change fairly obvious with frequency.In working band, the performance of the embodiment of the present invention is very well satisfied
Design requirement, in inoperative frequency band, the efficiency change of the embodiment of the present invention is obvious.The result shows that the embodiment of the present invention is being protected
In the case that efficiency is higher than 40% when card retracts, the work belt of 500MHz and 300MHz are realized respectively in low-frequency range and high band
It is wide.The embodiment of the present invention has broadened the bandwidth of each working frequency range when realizing dual band operation.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of broadband dual-frequency section Doherty power amplifier based on phase delay double frequency output matching network, feature exist
In including broadband power divider (10), carrier wave amplifying circuit (20), the carrier wave double frequency output matching network based on phase delay
(30), peak value amplifying circuit (40) and the peak value double frequency output matching network (50) based on phase delay；
The output end of the output end of the upper road signal of the broadband power divider (10) and lower road signal respectively with carrier wave amplifying circuit
(20) it is connected with the input terminal of peak value amplifying circuit (40)；Described in the output end of the carrier wave amplifying circuit (20) and based on phase
The input terminal of the carrier wave double frequency output matching network (30) of delay is connected；The output end of the peak value amplifying circuit (40) be based on
The input terminal of the peak value double frequency output matching network (50) of phase delay is connected；The carrier wave double frequency output based on phase delay
The output end of matching network (30) is connected with the output end of the peak value double frequency output matching network (50) based on phase delay,
Signal output end as the Doherty power amplifier.
2. a kind of broadband dual-frequency section Doherty based on phase delay double frequency output matching network according to claim 1
Power amplifier, which is characterized in that the broadband power divider (10) energy is partially distributed to carrier wave amplifying circuit (20) and
Peak value amplifying circuit (40).
3. a kind of broadband dual-frequency section Doherty based on phase delay double frequency output matching network according to claim 1
Power amplifier, which is characterized in that the carrier wave amplifying circuit (20) is by carrier phase compensating line (201), carrier wave input matching
Network (202), carrier transis (203) are sequentially connected in series composition；The peak value amplifying circuit (40) is compensated by peak phase
Line (401), peak value input matching network (402), peak transistor (403) are sequentially connected in series composition；
The upper road signal of the broadband power divider (10) output, lower road signal respectively with the carrier phase compensating line (201) and
Peak phase compensating line (401) is connected, and the carrier phase compensating line (201) and peak phase compensating line (401) are adjusted respectively
The phase difference of upper road signal and lower road signal keeps two paths of signals phase at output identical.
4. a kind of broadband dual-frequency section Doherty based on phase delay double frequency output matching network according to claim 3
Power amplifier, which is characterized in that the carrier transis (203) is AB power-like amplifier, the peak transistor (403)
For C power-like amplifier, the two saturation output power having the same.
5. a kind of broadband dual-frequency section Doherty based on phase delay double frequency output matching network according to claim 1
Power amplifier, which is characterized in that the carrier wave double frequency output matching network (30) based on phase delay can be in two frequencies
It realizes and retracts and required impedance matching under saturation state in section；
The specific impedance matching requirements that the carrier wave double frequency output matching network (30) based on phase delay needs to meet:
At 6dB back-off point, realizes twice of optimal load matching in low-power in two frequency ranges, mention Carrier Power Amplifier
Preceding saturation in the saturated condition, is realized to reach double frequency Doherty power amplifier in the high efficiency of back-off point
Optimal load matching in two frequency ranges.
6. a kind of broadband dual-frequency section Doherty based on phase delay double frequency output matching network according to claim 5
Power amplifier, which is characterized in that the carrier wave double frequency output matching network (30) based on phase delay includes carrier wave output
First transmission line (301), carrier wave output second transmission line (302)；Wherein, the signal of carrier wave output first transmission line (301) is defeated
Enter end to be connected with the drain electrode of carrier transis (203).
7. a kind of broadband dual-frequency section Doherty based on phase delay double frequency output matching network according to claim 1
Power amplifier, which is characterized in that the peak value double frequency output matching network (50) based on phase delay can be put in peak value
Big circuit realizes high output impedance in two frequency ranges when not working, and meets peak power amplifier open-circuit condition, guarantees
Normal work of the Doherty power amplifier in two frequency ranges；
The peak value double frequency output matching network based on phase delay needs the specific impedance matching requirements met: in 6dB
At back-off point, the peak value double frequency output matching network based on phase delay can realize high output resistance in two frequency ranges
It is anti-, meet peak power amplifier open-circuit condition, guarantees normal work of the Doherty power amplifier in two frequency ranges；With
This in the saturated condition, can be realized the optimal load matching in two frequency ranges simultaneously.
8. a kind of broadband dual-frequency section Doherty based on phase delay double frequency output matching network according to claim 7
Power amplifier, which is characterized in that the peak value double frequency output matching network (50) based on phase delay includes peak value output
First transmission line (501), peak value output second transmission line (502), peak value output third transmission line (503), peak value output the 4th
Transmission line (504)；Wherein, the signal input part and the drain electrode phase of peak transistor (403) of peak value output first transmission line (501)
Even.
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| CN110266275A (en) * | 2019-07-23 | 2019-09-20 | 杭州电子科技大学富阳电子信息研究院有限公司 | A kind of broadband Doherty power amplifier of continuous inverse F class and the mixing of J class |
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| CN111585517A (en) * | 2020-04-16 | 2020-08-25 | 江苏大学 | Broadband dual-band 3-path Doherty power amplifier adopting combined output network |
| CN111697981A (en) * | 2019-03-15 | 2020-09-22 | 安普林荷兰有限公司 | Amplifying device and amplifying system including the same |
| CN112134534A (en) * | 2020-09-18 | 2020-12-25 | 东南大学 | Mode-switchable Doherty power amplifier based on double-compensation reactance and adjustable drain voltage technology |
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| WO2023206868A1 (en) * | 2022-04-26 | 2023-11-02 | 深圳清华大学研究院 | Signal transmission circuit, amplifier and transceiver |
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| CN111697981A (en) * | 2019-03-15 | 2020-09-22 | 安普林荷兰有限公司 | Amplifying device and amplifying system including the same |
| CN110266275A (en) * | 2019-07-23 | 2019-09-20 | 杭州电子科技大学富阳电子信息研究院有限公司 | A kind of broadband Doherty power amplifier of continuous inverse F class and the mixing of J class |
| CN110266275B (en) * | 2019-07-23 | 2024-05-14 | 杭州电子科技大学 | Broadband Doherty power amplifier with continuous inverse F-class and J-class mixing |
| CN111384901A (en) * | 2020-03-14 | 2020-07-07 | 电子科技大学 | Broadband high-efficiency three-way Doherty power amplifier based on post-matching network |
| CN111384901B (en) * | 2020-03-14 | 2023-02-24 | 电子科技大学 | Broadband high-efficiency three-way Doherty power amplifier based on post-matching network |
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| CN112134534A (en) * | 2020-09-18 | 2020-12-25 | 东南大学 | Mode-switchable Doherty power amplifier based on double-compensation reactance and adjustable drain voltage technology |
| CN112532185A (en) * | 2020-11-17 | 2021-03-19 | 江苏大学 | Dual-mode matching irregular structure Doherty power amplifier based on reflection coefficient circle optimization |
| CN112968672A (en) * | 2021-02-01 | 2021-06-15 | 华南理工大学 | Symmetrical Doherty power amplifier structure and radio frequency transceiver |
| CN113746435A (en) * | 2021-09-01 | 2021-12-03 | 北京顿思集成电路设计有限责任公司 | Doherty power amplifier, base station comprising Doherty power amplifier and communication system |
| WO2023206868A1 (en) * | 2022-04-26 | 2023-11-02 | 深圳清华大学研究院 | Signal transmission circuit, amplifier and transceiver |
| WO2024067211A1 (en) * | 2022-09-27 | 2024-04-04 | 华为技术有限公司 | Radio frequency front-end circuit and electronic device |
| CN116865685B (en) * | 2023-08-31 | 2023-11-10 | 成都明夷电子科技有限公司 | High-integration-level broadband high-efficiency power amplifier |
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