CN106982036A - A kind of broadband harmonic containing resistive wave filter suppresses power amplifier - Google Patents
A kind of broadband harmonic containing resistive wave filter suppresses power amplifier Download PDFInfo
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- CN106982036A CN106982036A CN201710177445.0A CN201710177445A CN106982036A CN 106982036 A CN106982036 A CN 106982036A CN 201710177445 A CN201710177445 A CN 201710177445A CN 106982036 A CN106982036 A CN 106982036A
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- 238000013461 design Methods 0.000 abstract description 26
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- 230000001235 sensitizing effect Effects 0.000 abstract description 7
- 230000001629 suppression Effects 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910002601 GaN Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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Classifications
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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
- H03F1/56—Modifications of input or output impedances, not otherwise provided for
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
-
- 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
-
- 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
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
- H03F3/245—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages with semiconductor devices only
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/165—A filter circuit coupled to the input of an amplifier
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Microwave Amplifiers (AREA)
Abstract
A kind of broadband harmonic containing resistive wave filter of the present invention suppresses power amplifier, belongs to power amplifier field.Of the invention to introduce two extra resistance adjustment harmonic impedances by the way of microstrip lines, absorption harmonic power so that find out even in crystal end surfaces has very big harmonic power, but still will not be output to the resistance absorption that load is above matched network；So among following Designing power amplifier, the harmonic impedance of crystal end surfaces can flexibly be designed in the case where ensureing harmonic power suppression by carrying out output matching using the structure.Using the harmonious wave filter of the output matching network of new resistive wave filter co-design power amplifier, the two is set to combine together, the overall matching network as power amplifier；The two that can be effectively prevented from independent design makes the impedance of power amplifier input fall into sensitizing range so as to reducing the service behaviour of power amplifier after cascade.
Description
Technical field
The invention belongs to power amplifier field.
Background technology
Present existing wave filter or power amplifier, the co-design of both considers less.Power is not eliminated to put
Big influence of the device harmonic power to transmitter system, among the emitter of traditional wireless communication system, common use
Shown in front radio-frequency system diagram 1；
Harmonic controling is a kind of technology for effectively improving efficiency of RF power amplifier.It is big in next generation communication system
The complex modulated signal of dynamic range, the emitter of traditional structure can only meet linear index by the method for back-off,
Efficiency power amplifier is caused to reduce；And the peak efficiencies of AB power-like amplifiers in itself are also limited by theoretical value 78.5%.For
The efficiency bottle neck of traditional transmitter is broken through, forth generation communication transmitter arises at the historic moment.Forth generation emitter is mainly characterized by
Rely on the thinking that signal transacting is combined with new-type circuit modular structure so that have more the nonlinear power amplifier of odds for effectiveness
Applied.High efficiency power amplifier based on harmonic controling technology just belongs to one kind of nonlinear power amplifier.Therefore,
For the focus studied with being applied to radio circuit field of harmonic wave power-like amplifier designing technique.
In traditional power amplifier matched design, in order to obtain excellent power amplifier properties, crystal end surfaces
Impedance is designed for required harmonic controling impedance, and the impedance of load end is all the Ω of normal impedance 50.This constant hinders
Anti- to show whether fundamental wave or harmonic wave, impedance value is all 50 ohm.And in actual application, in order to reduce power amplifier
With the outer influence to other channels, a harmonic filter is generally required.After being cascaded with power amplifier, it is presented on power and puts
The harmonic impedance of big device load end face much deviates 50 Ω.This can carry out tremendous influence for designed power band, because humorous
Wave impedance with design when it is entirely different.Or it is limited to the bandwidth of operation of antenna, after being cascaded with it, harmonic impedance
50 Ω can be deviateed.Deteriorate performance --- the efficiency of power amplifier for this, gain, power output is deteriorated.
On the other hand, for the harmonic filter in a broadband, in the case where suppressing harmonic wave as far as possible, scattering parameter
S11 must be walked around Smith chart (the useful graphical tool for solving radio circuit resistance matching problem) edge.If humorous
More than one, wave impedance region octave, then on Smith chart, S11 will be enclosed around Smith chart wound edgewise one.
And power amplifier has impedance sensitive region, in these regions, efficiency power is very low.So as in power amplifier and
Wave filter independent design, then after being concatenated together, have part resistance region and fall into sensitizing range, reduce the property of this partial-band
Energy.
It is secondary in 2GHz and three that Fig. 2 and Fig. 3 sets forth gallium nitride transistor CGH40010F using CREE companies
(load balance factor is a kind of emulation side for being commonly used to determine the optimal input and output impedance of transistor to the result of subharmonic load balance factor
Method).Its result is shown, in Smith chart marginal portion, there is efficiency power sensitizing range, in these regions, efficiency and
Power is very low.In design, it should avoid harmonic impedance from falling into these regions.For narrow band power amplifier, it is easy to keep away
Open these sensitizing ranges.Can be for wideband power amplifer, such as 1.7-2.6GHz, its secondary triple-frequency harmonics frequency range is：3.4-
8.4GHz, its harmonic wave band limits has exceeded an octave.So traditional wave filter is in the case where filtering out harmonic wave, filtering
The harmonic wave of device is necessarily walked along the edge of Smith chart, then in the range of an octave, necessarily there is fractional harmonic resistance
The anti-sensitizing range that fall into power amplifier.So that the performance of power amplifier deteriorates.
Fig. 4 gives the domain of a two traditional triple frequency harmonic filters, its simulation result such as Fig. 5 and Fig. 6.From emulation
As a result as can be seen that when harmonic power is suppressed 30dBc with respect to fundamental power, contrasting load balance factor result above, its S11
Subregion pass through power amplifier sensitizing range impedance.
In addition, in traditional design, even if power amplifier and the individually designed effect of two independent devices of wave filter
Preferably, but link together, both penalties are strong.The work(for having preferable performance is independently simulated according to traditional design
Rate amplifier, a secondary triple frequency harmonic filter, then be concatenated together.Its domain is as shown in Figure 7.Fig. 8 and Fig. 9 give biography
Simulation result in system design.Fig. 8, Fig. 9 show that the shortcoming of conventional power amplifier and wave filter independent design is fairly obvious,
After harmonic supression filter and power amplifier co-design, efficiency power amplifier and power output have significantly
Deteriorate.
The content of the invention
In view of the deficiencies of the prior art, a kind of broadband harmonic containing resistive wave filter of Curve guide impeller suppresses the present invention
Power amplifier, the problem of solving existing power amplification wherein harmonic wave cannot effectively suppress.
The present invention is introduced two extra resistance adjustment harmonic impedances, is absorbed harmonic wave work(by the way of microstrip lines
Rate so that find out even in crystal end surfaces, has very big harmonic power, but still will not be output in load and be matched net
The resistance absorption of network；So among following Designing power amplifier, carrying out output matching using the structure can ensure humorous
In the case that wave power suppresses, the harmonic impedance of crystal end surfaces can be flexibly designed.Thus the technical scheme is that
A kind of broadband harmonic containing resistive wave filter suppresses power amplifier, and the power amplifier includes：Power amplifier module, microstrip line
Distribution network, microstrip line filter network, it is characterised in that harmonic absorption branch road, the harmonic absorption are drawn on microstrip line filter network
Branch road includes：Coupled microstrip line, resistance, coupled microstrip line one end connection microstrip line filter network, other end connection resistance, electricity
Hinder other end ground connection.
Further, the electricity in two harmonic absorption branch roads, every absorption branch road is drawn on the microstrip line filter network
It is 50 ohm to hinder size.
The present invention is filtered by using the output matching network harmonic of new resistive wave filter co-design power amplifier
Ripple device, makes the two combine together, the overall matching network as power amplifier；Can be effectively prevented from independent design the two
The impedance of power amplifier input is set to fall into sensitizing range to reduce the service behaviour of power amplifier after cascade；While energy
The influence for avoiding harmonic impedance from being caused after changing to power amplifier performance, there is stronger anti-harmonic impedance mismatch capability.The present invention
Efficiency in 1.6-2.7GHz working frequency range is between 70%~80%；Power output is better than 40dBm.
Figure of description
Fig. 1 is traditional transmitter structure of radio-frequency front end；
Fig. 2 is secondary load traction result at 2GHz；
Fig. 3 is triple-frequency harmonics load balance factor result at 2GHz；
Fig. 4 is traditional harmonic filter domain；
Fig. 5 is traditional secondary, triple frequency harmonic filter；
Fig. 6 is conventional harmonic wave filter scattering parameter S21 simulation results；
Fig. 7 is conventional power amplifier matching network and harmonic filter cascade domain；
Fig. 8 is emulation drain efficiency curve：Solid line is efficiency power amplifier, and dotted line is power amplifier and filter stage
Efficiency curve after connection；
Fig. 9 is simulation data power curve：Solid line is power amplifier output power, and dotted line is power amplifier and filtering
Output power curve after device cascade；
The novel emission machine structure of radio-frequency front end of Figure 10 application present invention；
Figure 11 proposes a kind of new resistive wave filter；
Figure 12 is the co-design of power amplifier matching network and new resistive wave filter；
Figure 13 is the S11 curves of power amplifier matching network and resistive wave filter in crystal end surfaces；
Figure 14 is the simulation result of new resistive wave filter and power amplifier co-design, power output and efficiency；
Figure 15 is actual measurement co-design circuit output efficiency, power, gain curve；
Figure 16 is the actual measurement secondary triple-frequency harmonics of co-design circuit with respect to fundamental frequency suppression situation；
Figure 17 is the change curve of the impedance value of output matching network after load impedance changes.
Specific implementation
The present invention research contents be：The harmonic controling of power amplifier matching network, resistive wave filter research.Because humorous
Ripple controls power-like amplifier, and its performance depends on harmonic wave, particularly secondary, triple-frequency harmonics impedance.And harmonic controling class power
Amplifier is, it is necessary to which certain harmonic power, makes the voltage current waveform of crystal end surfaces stagger as far as possible, to reach high efficiency
State.Contradiction, these harmonic powers are harmful again to emission system, it is therefore desirable to suppressed by wave filter.Harmonic wave is filtered
The introducing of ripple device can cause power amplifier input impedance to change again.Therefore, research of the invention is focused on to harmonic wave
In the case of suppression, while ensureing that harmonic impedance avoids harmonic impedance sensitizing range.
First, new resistive filter topology is studied first：
Lower Figure 11 is the new resistive harmonic filter applied in power amplifier output designed in the present invention,
The harmonic impedance of harmonic power and adjustment power amplifier is absorbed by the resistance element of filter internal.The absorption of harmonic power
By introducing a resistive branch road in parallel, it is set to be strong reflection state to fundamental wave by using coupling lines matching, and harmonic wave is in
Existing preferable matching status.So, whether impedance of fundamental frequency or harmonic impedance, in input port input impedance function ZinAnd source
Impedance RsCan preferably it match.
Secondth, (power amplifier harmonic presses down harmonics restraint wideband power amplifer of the design containing new resistive structures
The co-design of wave filter processed)：
Figure 12 is the power amplifier matching network of this technology invention design and the resistive filter construction proposed, from figure
Middle harmonic filter network can be seen that two extra resistances of introducing, carry out absorbed power amplifier harmonic power.
3rd, apply radio frequency circuit simulated instrument to carry out simulating, verifying in the circuit of design：
Figure 13 gives the S that power amplifier output port encapsulation plane looks over matching network11With the rotation of frequency
Curve, in whole fundamental wave to triple-frequency harmonics frequency range, bypasses the impedance sensitive region of Smith chart, it is ensured that realize high efficiency and
Higher output power.
Figure 14 gives the efficiency of co-design and the simulation curve of power output, according to result as can be seen that being proposed
The co-design of resistive wave filter and power amplifier matching network can obtain preferable result.Wherein in whole default work
Make in frequency range (1.6-2.7GHz) efficiency be 70%~80% between；Power output is better than 40dBm.
4th, processing in kind is carried out to invention and is tested：
Figure 15 to 17 gives the object test result figure of the present invention.
Measured result shows that circuit structure proposed by the present invention can improve for a certainty asks present in existing traditional design
Topic, inhibits that power amplifier is secondary and triple-frequency harmonics work(in the case of ensureing the efficiency and power of power amplifier preferably
Rate, and can be with the harmonic impedance in flexible design transistor output face, to the following emitter for being applied to brand-new communication era
There is provided new power amplifier circuit structure.
Claims (2)
1. a kind of broadband harmonic containing resistive wave filter suppresses power amplifier, the power amplifier includes：It is power amplifier module, micro-
Band lines matching network, microstrip line filter network, it is characterised in that harmonic absorption branch road is drawn on microstrip line filter network, this is humorous
Ripple, which absorbs branch road, to be included：Coupled microstrip line, resistance, coupled microstrip line one end connection microstrip line filter network, other end connection
Resistance, resistance other end ground connection.
2. a kind of broadband harmonic containing resistive wave filter as claimed in claim 1 suppresses power amplifier, it is characterised in that
Two harmonic absorption branch roads are drawn on the microstrip line filter network.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710177445.0A CN106982036A (en) | 2017-03-23 | 2017-03-23 | A kind of broadband harmonic containing resistive wave filter suppresses power amplifier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710177445.0A CN106982036A (en) | 2017-03-23 | 2017-03-23 | A kind of broadband harmonic containing resistive wave filter suppresses power amplifier |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113271067A (en) * | 2021-06-02 | 2021-08-17 | 中国科学院微电子研究所 | Doherty power amplifier based on de-matching structure and electronic equipment |
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| CN102332886A (en) * | 2011-08-16 | 2012-01-25 | 雷良军 | Multi-frequency-band power amplifier |
| CN104779963A (en) * | 2014-01-15 | 2015-07-15 | 联发科技股份有限公司 | Transmitter and method for operating the same |
| CN104868860A (en) * | 2015-05-15 | 2015-08-26 | 四川龙瑞微电子有限公司 | Microwave power amplifier capable of inhibiting harmonic waves |
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2017
- 2017-03-23 CN CN201710177445.0A patent/CN106982036A/en active Pending
Patent Citations (4)
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| CN101662263A (en) * | 2008-08-27 | 2010-03-03 | 中国科学院微电子研究所 | Bias circuit used in Ku waveband internally-matched field effect transistor |
| CN102332886A (en) * | 2011-08-16 | 2012-01-25 | 雷良军 | Multi-frequency-band power amplifier |
| CN104779963A (en) * | 2014-01-15 | 2015-07-15 | 联发科技股份有限公司 | Transmitter and method for operating the same |
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Non-Patent Citations (1)
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| 曹韬: "2.14GHz微带线E类功率放大器的设计", 《中国会议》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113271067A (en) * | 2021-06-02 | 2021-08-17 | 中国科学院微电子研究所 | Doherty power amplifier based on de-matching structure and electronic equipment |
| CN113271067B (en) * | 2021-06-02 | 2024-04-02 | 中国科学院微电子研究所 | Doherty power amplifier based on dematching structure and electronic equipment |
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