CN105450185A - Reconfigurable high-efficiency high-linearity broadband power amplifying method and amplifier - Google Patents
Reconfigurable high-efficiency high-linearity broadband power amplifying method and amplifier Download PDFInfo
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- CN105450185A CN105450185A CN201510939307.2A CN201510939307A CN105450185A CN 105450185 A CN105450185 A CN 105450185A CN 201510939307 A CN201510939307 A CN 201510939307A CN 105450185 A CN105450185 A CN 105450185A
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- power
- power amplifier
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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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- 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
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/213—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only in integrated circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/217—Class D power amplifiers; Switching amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/36—Indexing scheme relating to amplifiers the amplifier comprising means for increasing the bandwidth
Abstract
The invention discloses a reconfigurable high-efficiency high-linearity broadband power amplifying method and an amplifier. One output end of an unequal Wilkinson power divider in the amplifier is connected with a carrier power amplifier, and the other output end of the unequal Wilkinson power divider is connected with a peak power amplifier; the carrier power amplifier is connected with one input end of a power combiner through a 1/4 wave length impedance transformer; the output end of the peak power amplifier is connected with the other input end of the power combiner; the input end of the power combiner is connected with a load modulation network; the load modulation network is characterized in that a section of 1/4 wave length transmission line is connected in parallel to the tail of the conventional 1/4 wave length transmission line; and the bandwidth of the conventional Doherty is broadened. According to the amplifying method and the amplifier, drifting of 'effective' load impedance along with operating frequency can be inhibited greatly, so that the broadband of the Doherty amplifier is improved, which provides guarantee for improving the overall broadband of the Doherty amplifier.
Description
Technical field
The present invention relates to a kind of power amplifier, be specifically related to a kind of restructural high efficiency High Linear broadband power amplification method and amplifier.
Background technology
Power amplifier, as the final block in transmitter, is the parts that in whole radio system, power consumption is maximum, and its Main Function carries out power amplification to the signal that prime exports, and then gives antenna by the signal after amplification and launch.Because power amplifier can consume very large direct current power, the important indicator first will considered when therefore efficiency is Designing power amplifier, simultaneously power output, the linearity, bandwidth are also the key indexs of power amplifier.This is mainly reflected in such the following aspects: the bandwidth of (1) power amplifier.Because present multiple communication standard is compatible, respective working frequency range is different again, for the consideration of cost and volume, require that a power amplifier can be applied to multiple communication system as GSM, CMDA, LTE etc., this will have higher requirement for the bandwidth of whole radio system, particularly have higher requirement for the power amplifier being in whole radio-frequency (RF) emission system final stage.(2) linearity of power amplifier.Because up-to-date communication system is as in CMDA, LTE etc. are in increasingly serious communication environment, in order to ensure the indexs such as the error rate in the transmitting procedure of whole signal, the linearity of whole system must be improved, and be exactly the power amplifier being in end for the device that radio-frequency transmissions front end linearity degree has the greatest impact.(3) efficiency of power amplifier.Due to the afterbody that power amplifier is whole rf transmitter unit, consume maximum energy, so just require that the efficiency of power amplifier is high as much as possible.Because Modern Communication System is all with the transmission means that modulation signal is main, this just requires that power amplifier not only will keep high efficiency when Maximum Power Output, also requires also there is very high efficiency when back-off.Broadband Doherty power amplifier has still can keep high efficiency characteristic in power output rollback situation, be applicable in new generation of wireless communication system, in order to improve the efficiency of more wide bandwidth internal power amplifier further, have recently emerged a kind of new power amplifier mode of operation, it is exactly continuously F power-like amplifier, be different from the strict demand of traditional F power-like amplifier for high order harmonic component (mainly second harmonic and triple-frequency harmonics), continuous F power-like amplifier requires not high enough to high order harmonic component, this pattern only requires two, triple-frequency harmonics reactance and impedance of fundamental frequency reach certain relation ratio, just can obtain in wider bandwidth and the much the same efficiency of F class and power output.Why continuous F power-like amplifier can obtain the impedance that so high reason is mainly appropriate adjustment high order harmonic component, adjust the voltage and current of corresponding harmonic wave, thus total voltage current waveform is reinvented, make the overlap not occurring electric current and voltage in time domain, on frequency domain, high order harmonic component power consumption is zero, can reach the efficiency of 100% in theory.On broadband and efficiency bidirectional demand, the various advantages of continuous F class makes them become the focus of broadband high-efficiency power amplifier research.Carrier Power Amplifier in the Doherty power amplifier of current broadband and peak power amplifier are all only consider that broadband first-harmonic coupling does not consider the raising of harmonic controling to efficiency, the research emphasis of broadband Doherty how to widen the bandwidth of power amplifier, especially 1/4 wavelength transmission line load modulation network after major-minor power amplifier.How improving the efficiency of broadband Doherty power amplifier in back-off situation is a problem demanding prompt solution.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, propose a kind of restructural high efficiency High Linear wideband power amplifer.
A kind of restructural high efficiency High Linear broadband power amplification method; Specifically comprise the steps:
Step one: the continuous F power-like amplifier of a debugging standard is as Carrier Power Amplifier;
Step 2: the phase compensation line regulating Carrier Power Amplifier output, makes Carrier Power Amplifier reach a high efficiency point in low-power district; The efficiency of back-off 6dB when described high-efficiency point is Carrier Power Amplifier Saturated output;
Step 3: add a continuous F power-like amplifier as peak power amplifier;
Step 4: the phase compensation line regulating peak power amplifier in, ensures that carrier power amplifier is consistent with the phase place of peak value power amplifier;
Step 5: add 1/4 short circuit minor matters transmission line in parallel after carrier wave and peak value power amplifier.
The load impedance of described continuous F class power amplifier is 50 Europe.
A kind of restructural high efficiency High Linear wideband power amplifer, comprises not decile Wilkinson power divider, Carrier Power Amplifier, peak power amplifier and load modulation network;
An output of decile Wilkinson power divider does not carry Power Amplifier, another exports termination peak power amplifier, Carrier Power Amplifier is connected with an input of power combiner by 1/4 wavelength impedance transformers, another input of the output termination power combiner of peak power amplifier, the input termination load modulation network of power combiner; The not output that is connected with Carrier Power Amplifier of decile Wilkinson power divider, with not decile Wilkinson power divider and the merit proportion by subtraction 1: 1.5 connecing the output that peak power amplifier is connected; Described Carrier Power Amplifier is identical with peak power amplifier architecture, is continuous F power-like amplifier;
Described load modulation network, one section of 1/4 wavelength transmission line in parallel again after 1/4 traditional wavelength transmission line; Widen the bandwidth of traditional Doherty;
Phase compensation line is provided with between described not decile Wilkinson power divider and Carrier Power Amplifier;
Phase compensation line is provided with between described peak power amplifier and power combiner.
Phase compensation line is provided with between described Carrier Power Amplifier and power combiner.
Beneficial effect: in order to reduce main power amplifier and assist the phase difference between putting, upper and lower two power amplifiers adopt the device of formed objects and identical match circuit, carrier wave and peak value power amplifier all control harmonic wave by continuous F class, make efficiency obtain maximum raising meeting under certain bandwidth requirement.Have employed the input of non-decile in the design, to ensure that rollback point efficiency is significantly increased in the bandwidth required, the linearity also improves simultaneously.It is made to open in advance by injecting more power to auxiliary power amplifier, contain that the degree of depth of the main power amplifier of low-power input area is saturated on the one hand, also strengthen it in the draw of high power region to main power amplifier on the other hand, thus improve the efficiency of power amplifier at whole power section, frequency band.But the excessive saturation condition that main power amplifier also can be made cannot to reach desirable of merit proportion by subtraction, this can have a strong impact on peak value and export and efficiency.Consider each side selecting factors merit proportion by subtraction 1: 1.5.Broadband Doherty power amplifier only needs several sections of microstrip lines just can reach the design object of expection, does not need the circuit structure of too load.Due to 1/4 wavelength transmission line phase-shift phase and frequency closely related, therefore when operating frequency departs from centre frequency, corresponding modulation impedance also can offset optimal value, causes the decay of amplifier performance.By the 1/4 wavelength short circuit minor matters that interpolation one on the basis of traditional structure is in parallel, can greatly suppress " effectively " load impedance with the drift of operating frequency, thus this is that the overall bandwidth promoting Doherty amplifier provides guarantee to promote Doherty amplifier bandwidth.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 be of the present invention in the structural representation of continuous F class power amplifier.
Embodiment
A kind of restructural high efficiency High Linear broadband power amplification method; Specifically comprise the steps:
Step one: the continuous F power-like amplifier of a debugging standard is as Carrier Power Amplifier;
Step 2: the phase compensation line regulating Carrier Power Amplifier output, makes Carrier Power Amplifier reach a high efficiency point in low-power district; The efficiency of back-off 6dB when described high-efficiency point is Carrier Power Amplifier Saturated output;
Step 3: add a continuous F power-like amplifier as peak power amplifier;
Step 4: the phase compensation line regulating peak power amplifier in, ensures that carrier power amplifier is consistent with the phase place of peak value power amplifier;
Step 5: add 1/4 short circuit minor matters transmission line in parallel after carrier wave and peak value power amplifier.
The load impedance of described continuous F class power amplifier is 50 Europe.
As shown in Figure 1, a kind of restructural high efficiency High Linear wideband power amplifer, comprises not decile Wilkinson power divider, Carrier Power Amplifier, peak power amplifier and load modulation network;
An output of decile Wilkinson power divider does not carry Power Amplifier, another exports termination peak power amplifier, Carrier Power Amplifier is connected with an input of power combiner by 1/4 wavelength impedance transformers, another input of the output termination power combiner of peak power amplifier, the input termination load modulation network of power combiner; The not output that is connected with Carrier Power Amplifier of decile Wilkinson power divider, with not decile Wilkinson power divider and the merit proportion by subtraction 1: 1.5 connecing the output that peak power amplifier is connected; Described Carrier Power Amplifier is identical with peak power amplifier architecture, is continuous F power-like amplifier;
Described load modulation network, one section of 1/4 wavelength transmission line in parallel again after 1/4 traditional wavelength transmission line;
Phase compensation line is provided with between described not decile Wilkinson power divider and Carrier Power Amplifier;
Phase compensation line is provided with between described peak power amplifier and power combiner.
Phase compensation line is provided with between described Carrier Power Amplifier and power combiner.
As shown in Figure 2, continuous F class power amplifier comprises input matching circuit, amplifier, first-harmonic match circuit and harmonic wave control circuit;
The input termination power input of input matching circuit, the input of the output termination amplifier of input matching circuit, the input of the output termination first-harmonic match circuit of amplifier, the input of the output termination harmonic controling circuit of first-harmonic match circuit, the output of harmonic controling circuit is as power stage.
Claims (6)
1. a restructural high efficiency High Linear broadband power amplification method; It is characterized in that:
Step one: the continuous F power-like amplifier of a debugging standard is as Carrier Power Amplifier;
Step 2: the phase compensation line regulating Carrier Power Amplifier output, makes Carrier Power Amplifier reach a high efficiency point in low-power district; The efficiency of back-off 6dB when described high-efficiency point is Carrier Power Amplifier Saturated output;
Step 3: add a continuous F power-like amplifier as peak power amplifier;
Step 4: the phase compensation line regulating peak power amplifier in, ensures that carrier power amplifier is consistent with the phase place of peak value power amplifier;
Step 5: add 1/4 short circuit minor matters transmission line in parallel after carrier wave and peak value power amplifier.
2. a kind of restructural high efficiency High Linear broadband power amplification method according to claim 1; It is characterized in that: the load impedance of described continuous F class power amplifier is 50 Europe.
3. a restructural high efficiency High Linear wideband power amplifer, is characterized in that: comprise not decile Wilkinson power divider, Carrier Power Amplifier, peak power amplifier and load modulation network;
An output of decile Wilkinson power divider does not carry Power Amplifier, another exports termination peak power amplifier, Carrier Power Amplifier is connected with an input of power combiner by 1/4 wavelength impedance transformers, another input of the output termination power combiner of peak power amplifier, the input termination load modulation network of power combiner; The not output that is connected with Carrier Power Amplifier of decile Wilkinson power divider, with not decile Wilkinson power divider and the merit proportion by subtraction 1: 1.5 connecing the output that peak power amplifier is connected; Described Carrier Power Amplifier is identical with peak power amplifier architecture, is continuous F power-like amplifier;
Described load modulation network, one section of 1/4 wavelength transmission line in parallel again after 1/4 traditional wavelength transmission line.
4. a kind of restructural high efficiency High Linear wideband power amplifer according to claim 3; It is characterized in that: between described not decile Wilkinson power divider and Carrier Power Amplifier, be provided with phase compensation line.
5. a kind of restructural high efficiency High Linear wideband power amplifer according to claim 3; Phase compensation line is provided with between described peak power amplifier and power combiner.
6. a kind of restructural high efficiency High Linear wideband power amplifer according to claim 3; Phase compensation line is provided with between described Carrier Power Amplifier and power combiner.
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| CN201510939307.2A CN105450185A (en) | 2015-12-15 | 2015-12-15 | Reconfigurable high-efficiency high-linearity broadband power amplifying method and amplifier |
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| CN201510939307.2A CN105450185A (en) | 2015-12-15 | 2015-12-15 | Reconfigurable high-efficiency high-linearity broadband power amplifying method and amplifier |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356606A (en) * | 2016-08-30 | 2017-01-25 | 电子科技大学 | Miniaturized phase shifting equalizer based on Wilkinson power divider |
| CN107425814A (en) * | 2017-08-07 | 2017-12-01 | 杭州电子科技大学 | A kind of broadband Doherty power amplifier based on compensation parasitic capacitance |
| CN107508560A (en) * | 2017-08-11 | 2017-12-22 | 杭州电子科技大学 | A kind of Doherty power amplifier and its implementation for strengthening bandwidth performance |
| CN107547051A (en) * | 2017-08-28 | 2018-01-05 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Doherty power amplifier based on distributed broadband impedance mapped structure |
| CN109873612A (en) * | 2019-01-22 | 2019-06-11 | 北京邮电大学 | A kind of double frequency-band high efficiency power amplifier based on multi-ladder stub matching network |
| CN109921750A (en) * | 2019-01-24 | 2019-06-21 | 杭州电子科技大学 | A kind of wideband power amplifer and its design method based on active load modulation |
| 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 |
| CN113114151A (en) * | 2021-04-29 | 2021-07-13 | 成都天锐星通科技有限公司 | Bandwidth reconfigurable radio frequency attenuator and phased array system |
| CN117176095A (en) * | 2023-08-31 | 2023-12-05 | 芯百特微电子(无锡)有限公司 | Input power self-adaptive distribution Doherty power amplifier |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356606B (en) * | 2016-08-30 | 2018-09-25 | 电子科技大学 | A kind of miniaturization phase shift balanced device based on Wilkinson power divider |
| CN106356606A (en) * | 2016-08-30 | 2017-01-25 | 电子科技大学 | Miniaturized phase shifting equalizer based on Wilkinson power divider |
| CN107425814A (en) * | 2017-08-07 | 2017-12-01 | 杭州电子科技大学 | A kind of broadband Doherty power amplifier based on compensation parasitic capacitance |
| CN107508560A (en) * | 2017-08-11 | 2017-12-22 | 杭州电子科技大学 | A kind of Doherty power amplifier and its implementation for strengthening bandwidth performance |
| CN107547051B (en) * | 2017-08-28 | 2020-10-23 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Doherty power amplifier based on distributed broadband impedance transformation structure |
| CN107547051A (en) * | 2017-08-28 | 2018-01-05 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Doherty power amplifier based on distributed broadband impedance mapped structure |
| CN109873612B (en) * | 2019-01-22 | 2021-01-08 | 北京邮电大学 | Double-frequency-band high-efficiency power amplifier based on multi-step branch matching network |
| CN109873612A (en) * | 2019-01-22 | 2019-06-11 | 北京邮电大学 | A kind of double frequency-band high efficiency power amplifier based on multi-ladder stub matching network |
| CN109921750A (en) * | 2019-01-24 | 2019-06-21 | 杭州电子科技大学 | A kind of wideband power amplifer and its design method based on active load modulation |
| CN109921750B (en) * | 2019-01-24 | 2023-05-26 | 杭州电子科技大学 | Broadband power amplifier based on active load modulation and design method thereof |
| 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 |
| CN113114151A (en) * | 2021-04-29 | 2021-07-13 | 成都天锐星通科技有限公司 | Bandwidth reconfigurable radio frequency attenuator and phased array system |
| CN113114151B (en) * | 2021-04-29 | 2022-12-20 | 成都天锐星通科技有限公司 | Bandwidth reconfigurable radio frequency attenuator and phased array system |
| CN117176095A (en) * | 2023-08-31 | 2023-12-05 | 芯百特微电子(无锡)有限公司 | Input power self-adaptive distribution Doherty power amplifier |
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