CN208063142U - A kind of high efficiency power amplifier - Google Patents
A kind of high efficiency power amplifier Download PDFInfo
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- CN208063142U CN208063142U CN201721513899.2U CN201721513899U CN208063142U CN 208063142 U CN208063142 U CN 208063142U CN 201721513899 U CN201721513899 U CN 201721513899U CN 208063142 U CN208063142 U CN 208063142U
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Abstract
The utility model is related to radio communication base station technical fields, a kind of high efficiency power amplifier is provided, including 2dB couplers, load, carrier path input matching circuit, carrier path output matching circuit, power amplifier tube, the first micro-strip compensating line, the second micro-strip compensating line, combiner circuit, impedance transformation line and signal output end；Signal is divided into two-way after entering 2dB couplers；Signal passes through the first micro-strip compensating line, carrier path input matching circuit, carrier amplifier and carrier path output matching circuit successively from left to right all the way；Another way signal passes through peak value road input matching circuit, peak amplifier, peak value road output matching circuit and the second micro-strip compensating line successively from left to right；Two paths of signals synthesizes signal all the way by combiner circuit, and after impedance transformation line, the signal being amplified is exported from signal output end.The utility model had both met efficient requirement, there is the peak power of 400W, and can accomplish of low cost, while can guarantee power amplifier reliable operation again.
Description
Technical field
The utility model is related to radio communication base station technical fields, are to be related to a kind of highly efficient power amplification more specifically
Device.
Background technology
With the development of data communication and multimedia service demand, mobile data, mobile computing and mobile multimedia are adapted to
The forth generation mobile communication for operating needs is in the ascendant, and the 5th third-generation mobile communication comes into research pilot.Current movement is logical
Communication network covering cannot meet data communication service demand now.However, because frequency spectrum resource is limited, how to improve again and again
Resource utilization is just at current primary project.Therefore OFDM technology, that is, orthogonal frequency division multiplexi arises, this is a kind of
High speed transmission technology based on multicarrier, by the mutually orthogonal of multicarrier, efficiently to utilize limited frequency spectrum resource.It is main
Thought is that total bandwidth is decomposed into numerous subcarrier parallel transmissions, to effectively eliminate or reduce the interference between signal waveform, is improved
The availability of frequency spectrum.
Although OFDM technology can effectively reduce and eliminate intersymbol interference, its signal by adding cyclic prefix
There can be a relatively high peak-to-average force ratio (peak-to-average ratio, abbreviation PAR), the work(of the signal of high peak-to-average power ratio to base station
Rate amplifier it is more demanding, when the peak-to-average force ratio of signal be more than power amplifier linear dynamic range when, can introduce non-linear
Distortion, influences the transmission performance of signal.The power amplifier of base station subtracts for the distortionless signal for amplifying these high peak-to-average power ratios
The small bit error rate needs power amplifier to have bigger power capacity, ensures that signal will not be compressed when peak value, and work(
It is the most direct mode for reducing distortion that rate, which retracts then, it is done so that efficiency is very low, back-off meeting step-down amplifier unit
Current efficiency increases power consumption, such as the amplifying power pipe that a saturation power is 200W, when output power is 60W
It waits, efficiency is only 25%, and the Dc source power of wastage in bulk or weight is 240W, the power of other 180W is converted into thermal energy and consumes
Fall, if can not be in time by heat energy transfer, it will junction temperature is caused to increase rapidly and finally burn out.With the increase of frequency, with
And the requirement of basis miniaturization, harsher requirement is proposed to the heat dissipation of amplifier module, i.e., to the electricity of power amplifier module
Flowing efficiency, more stringent requirements are proposed.Its internal power amplifier tube of traditional power amplifier module operate mainly in A classes or
Under person's AB class states, current efficiency is low, and cooling requirements are high, and the size of radiator is bigger.
Both power amplifier how had been allowed to have a big power capacity, while having guarantor in the case that back-off is more
Higher current efficiency is held, the project for being badly in need of solving is become.
Utility model content
The purpose of this utility model is to provide a kind of high efficiency power amplifiers using asymmetric Doherty technologies, make
It had both had the peak power of 400W, while when back-off 8dB exports 48dbm (64W) power, electric current according to
High efficiency can so be maintained, Doherty technologies compared with other technologies, have it is of simple structure and low cost, to system linear
Degree influence it is relatively small, and and the advantages of it is suitable for the modern wireless signal efficiency transmissions of high peak-to-average power ratio, therefore as existing
Most there is the technology of commercial foreground in generation wireless communication Amplifier Design.
In order to solve the above technical problems, the technical solution of the utility model is：A kind of high efficiency power amplifier, including：Letter
Number input terminal, 2dB couplers, load, carrier path input matching circuit, carrier path output matching circuit, power amplifier tube, first
Micro-strip compensating line, the second micro-strip compensating line, combiner circuit, impedance transformation line and signal output end；The power amplifier tube packet
Include carrier amplifier and peak amplifier, the 2dB couplers are four port orientations couplers, including input terminal, -90 ° it is straight-through
End, 0 ° of coupled end and isolation end, the isolation end are connected with load, from the signal all the way of signal input part input from input
End is divided into two paths of signals after entering 2dB couplers；It is micro- to pass through first from -90 ° of straight-through end outputs successively from left to right for signal all the way
Band compensating line, carrier path input matching circuit, carrier amplifier and carrier path output matching circuit；Another way signal is from described
0 ° of coupled end output passes through peak value road input matching circuit, peak amplifier, peak value road output matching electricity successively from left to right
Road and the second micro-strip compensating line；Two-way eventually arrives at the combiner circuit by the amplified signal of power amplifier, synthesis
After signal is using impedance transformation line all the way, the signal being amplified is exported from signal output end.
Further, the four port orientations coupler is non-decile power splitter, is carried out to the signal power of input non-etc.
Amount distribution.
Further, 50 Ohmic resistances are selected in the load.
Further, the power amplifier tube is newly released using AMPLEON companies the 9th generation novel LDMOS power
Amplifier tube BLC9G20LS-400AV.
Further, the BLC9G20LS-400AV power amplifier tubes are two-tube cored structure, and the power of two tube core holds
Amount is than being 1:1.5, it is suitble to do asymmetric Doherty structures, not only power density is big for power tube, and peripheral applications circuit face is positive
It is small, and be plastics cavity package, than conventional ceramic package, cost can reduce by 25% or more,
Further, the peak power of the BLC9G20LS-400AV power amplifier tubes is up to 56dBm (i.e. 400W).
Further, the impedance of the first micro-strip compensating line, the second micro-strip compensating line is 50 ohm, by using non-
Symmetrical Doherty technologies control being switched on or off for peak amplifier under different input power state, are carried to realize
The load of twt amplifier is modulated, and achievees the purpose that improve rollback efficiency so that and it had both had a relatively high saturation power, while
When back-off 8dB, electric current can still maintain high efficiency, and the second micro-strip compensating line is to ensure that amplifier is returned in power
Electric current high efficiency can be met when moving back output.
Further, when the phase of+90 ° of the phase delay of the second micro-strip compensating line=the first micro-strip compensating line
Prolong so that two paths of signals phase is consistent, lossless can be combined, and the first micro-strip compensating line of carrier power amplifier branch can make carrier wave
Power amplifier is transformed in the load impedance of back-off point closes on best efficiency point, and the second micro-strip compensating line of peak value power amplifier branch
The output impedance of peak value power amplifier under small-power state, can be made to present infinitely great, prevent carrier power amplifier in a low-power state
Power leakage to peak value power amplifier branch, and the second micro-strip compensating line and the first micro-strip compensating line are by carrier amplifier and peak value
The signal phase alignment of road output, Doherty is optimized in the performance of rollback power region so that two road signal junctions
Phase is consistent, and when phase is consistent, output power maximum peak power is up to 56dBm (400W).
The carrier amplifier that is mainly characterized by that carrier amplifier and peak amplifier constitute Doherty combinings is operated in
AB classes, peak amplifier are operated in C classes.There was only carrier amplifier work when inputting small signal, carrier wave is put when inputting big signal
Big device and peak amplifier work at the same time.Since peak amplifier is only interrupted sex work, the efficiency after combining is just promoted
Get up.The 9th generation for newly releasing of AMPLEON companies novel LDMOS power amplifier tube BLC9G20LS-400AV simultaneously, due to
The saturation power point after the combining of two power tubes is transferred to most preferably by rational matched design so that the power amplification
Device not only meets linear requirements, but also can have very high efficiency.
Further, the impedance transformation line length is quarter-wave, and impedance is 32 ohm so that the impedance of signal
Transform to 50 ohm of outputs.
Compared with prior art, it is new to use AMPLEON companies for a kind of high efficiency amplifier selection provided by the utility model
The 9th generation novel LDMOS power amplifier tube BLC9G20LS-400AV released are two-tube cored structure, the work(of two tube core
Rate capacity ratio is 1:1.5, it is suitble to do asymmetric Doherty structures.Not only power density is big for power tube, peripheral applications circuit face
It is actively small, and be plastics cavity package, than conventional ceramic package, cost can reduce by 25% or more.By using non-right
Claim Doherty technologies so that it had both had the peak power of 400W, while exporting 48dbm (64W) work(in back-off 8dB
When rate, electric current can still maintain high efficiency.When it is 48dBm (i.e. 64W) to export average power, entire electric current
Added efficiency is up to 45% or more, and than conventional operation, in the power amplifier of CLASS AB states, (electric current added efficiency is 20%
It is interior) improve 25%.Than symmetrical Doherty structures 10% is improved (in current efficiency 35%).Therefore, the utility model had been both
Efficient requirement is met, and can accomplish of low cost, while power amplifier reliable operation, stabilization is can guarantee again, is applicable to electricity
Believe the 40W optical fiber repeater types of centralized procurement, the final power amplifying unit as its internal core amplifier.
Description of the drawings
Fig. 1 is the circuit of the amplifier in an a kind of preferred embodiment of high efficiency power amplifier provided by the utility model
The connection diagram of structure.
Specific implementation mode
It is right with reference to the accompanying drawings and embodiments in order to make the purpose of this utility model, technical solution and advantage be more clearly understood that
The utility model is described in further detail.It should be appreciated that specific embodiment described herein is only used to explain this
Utility model is not used to limit the utility model, is based on the embodiments of the present invention, and those of ordinary skill in the art exist
The every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
It is in the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
The utility model and simplifying describes for ease of description, do not indicate or imply the indicated device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for description purposes only, and are not understood to indicate or imply relative importance.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete condition
The concrete meaning of language in the present invention.
Preferred embodiment provided by the utility model is illustrated below in conjunction with the accompanying drawings.
Fig. 1 is please referred to, is a preferred embodiment of the utility model, which includes：Signal input part 1,2dB couplings
Clutch 2, load 13, carrier path input matching circuit 4, carrier path output matching circuit 7, power amplifier tube 6, the compensation of the first micro-strip
Line 3, the second micro-strip compensating line 9, combiner circuit 10, impedance transformation line 11 and signal output end 12；The power amplifier tube 6 wraps
Including carrier amplifier 61 and peak amplifier 62, the 2dB couplers 2 are four port orientations couplers, including input terminal 21 ,-
90 ° of 23,0 ° of coupled ends 22 in straight-through end and isolation end 24, the isolation end 24 is connected with load 13, from signal input part 1
The signal all the way of input is divided into two paths of signals after entering 2dB couplers 2 from input terminal 21, and signal is defeated from -90 ° of straight-through ends 23 all the way
Go out, passes through the first micro-strip compensating line 3, carrier path input matching circuit 4, carrier amplifier 61 and carrier path successively from left to right
Output matching circuit, another way signal are exported from 0 ° of coupled end 22, from left to right, pass through peak value road input matching electricity successively
Road 5, peak amplifier 62, peak value road output matching circuit 8 and the second micro-strip compensating line 9, two paths of signals pass through power amplification
After pipe 6 amplifies, the combiner circuit 10 is eventually arrived at, signal is using impedance transformation line 11 all the way for synthesis, from signal output end
The signal that 12 outputs are amplified.
Specifically, the four port orientations coupler is non-decile power splitter, and non-equivalent is carried out to the signal power of input
Distribution.
Specifically, 50 Ohmic resistances are selected in the load 13.
Specifically, the power amplifier tube 6 is newly released using AMPLEON companies the 9th generation novel LDMOS power is put
Big pipe BLC9G20LS-400AV.
Specifically, the BLC9G20LS-400AV power amplifier tubes are two-tube cored structure, the power capacity of two tube core
Than being 1:1.5, it is suitble to do asymmetric Doherty structures, not only power density is big for power tube, and peripheral applications circuit face is positive
It is small, and be plastics cavity package, than conventional ceramic package, cost can reduce by 25% or more.
Specifically, the peak power of the BLC9G20LS-400AV power amplifier tubes is up to 56dBm (i.e. 400W).
Specifically, the impedance of the first micro-strip compensating line 3, the second micro-strip compensating line 9 is 50 ohm, and the second micro-strip is mended
It is to ensure that power amplifier tube 6 can meet electric current high efficiency when back-off exports to repay line 9.
Specifically, the phase of+90 ° of the phase delay of the second micro-strip compensating line 9=first micro-strip compensating line 3
Time delay so that two paths of signals phase is consistent, lossless can be combined.
Specifically, 11 length of impedance transformation line is quarter-wave, and impedance is 32 ohm, 32 ohm of impedance
The transmission line that the impedance for the signal that Combining Circuit exports is transformed to 50 ohm by transformation line 11 by 20 ohm is to signal output end 12.
The utility model had both met efficient requirement, had both had the peak power of 400W, while in back-off 8dB
When exporting 48dbm (64W) power, electric current can still maintain high efficiency, and can accomplish of low cost, while again can
Ensure power amplifier reliable operation, stabilization, be applicable to the 40W optical fiber repeater types of telecommunications centralized procurement, amplifies as its internal core
The final power amplifying unit of device.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (10)
1. a kind of high efficiency power amplifier, which is characterized in that including：Signal input part, 2dB couplers, load, carrier path input
Match circuit, carrier path output matching circuit, power amplifier tube, the first micro-strip compensating line, the second micro-strip compensating line, synthesis electricity
Road, impedance transformation line and signal output end；The power amplifier tube includes carrier amplifier and peak amplifier, the 2dB
Coupler is four port orientations couplers, including input terminal, -90 ° of straight-through ends, 0 ° of coupled end and isolation end, the isolation end
It is connected with load, the signal all the way inputted from signal input part is divided into two paths of signals after entering 2dB couplers from input terminal；One
Road signal passes through the first micro-strip compensating line, carrier path input matching circuit, carrier wave successively from left to right from -90 ° of straight-through end outputs
Amplifier and carrier path output matching circuit；Another way signal is exported from 0 ° of coupled end, from left to right, successively by peak
It is worth road input matching circuit, peak amplifier, peak value road output matching circuit and the second micro-strip compensating line；Two-way is through overpower
The amplified signal of amplifier eventually arrives at the combiner circuit, and signal is using impedance transformation line all the way for synthesis, then from signal
Output end exports the signal being amplified.
2. high efficiency power amplifier according to claim 1, it is characterised in that：The four port orientations coupler is non-etc.
Divide power splitter, non-equivalent distribution is carried out to the signal power of input.
3. high efficiency power amplifier according to claim 1, it is characterised in that：50 Ohmic resistances are selected in the load.
4. high efficiency power amplifier according to claim 1, it is characterised in that：The power amplifier tube uses AMPLEON
The 9th generation that company newly releases novel LDMOS power amplifier tubes BLC9G20LS-400AV.
5. high efficiency power amplifier according to claim 4, it is characterised in that：The BLC9G20LS-400AV power is put
Big pipe is two-tube cored structure, and the power capacity ratio of two tube core is 1:1.5.
6. high efficiency power amplifier according to claim 5, it is characterised in that：The BLC9G20LS-400AV power is put
The peak power of big pipe is up to 56dBm.
7. high efficiency power amplifier according to claim 6, it is characterised in that：The BLC9G20LS-400AV power is put
Big pipe uses plastics cavity package.
8. high efficiency power amplifier according to claim 1, it is characterised in that：It is the first micro-strip compensating line, second micro-
Impedance with compensating line is 50 ohm.
9. high efficiency power amplifier according to claim 8, it is characterised in that：When the phase of the second micro-strip compensating line
Prolong the phase delay of+90 °=the first micro-strip compensating line.
10. high efficiency power amplifier according to claim 1, it is characterised in that：The impedance transformation line length is four points
One of wavelength, impedance be 32 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721513899.2U CN208063142U (en) | 2017-11-14 | 2017-11-14 | A kind of high efficiency power amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721513899.2U CN208063142U (en) | 2017-11-14 | 2017-11-14 | A kind of high efficiency power amplifier |
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| Publication Number | Publication Date |
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| CN208063142U true CN208063142U (en) | 2018-11-06 |
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| CN201721513899.2U Active CN208063142U (en) | 2017-11-14 | 2017-11-14 | A kind of high efficiency power amplifier |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112019169A (en) * | 2020-09-29 | 2020-12-01 | 中新国际联合研究院 | Broadband high-gain Doherty power amplifier and implementation method thereof |
| WO2023138602A1 (en) * | 2022-01-18 | 2023-07-27 | 唯捷创芯（天津） 电子技术股份有限公司 | High-bandwidth load-modulation power amplifier and corresponding radio frequency front-end module |
| CN116865685A (en) * | 2023-08-31 | 2023-10-10 | 成都明夷电子科技有限公司 | High-integration-level broadband high-efficiency power amplifier |
-
2017
- 2017-11-14 CN CN201721513899.2U patent/CN208063142U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112019169A (en) * | 2020-09-29 | 2020-12-01 | 中新国际联合研究院 | Broadband high-gain Doherty power amplifier and implementation method thereof |
| WO2023138602A1 (en) * | 2022-01-18 | 2023-07-27 | 唯捷创芯（天津） 电子技术股份有限公司 | High-bandwidth load-modulation power amplifier and corresponding radio frequency front-end module |
| CN116865685A (en) * | 2023-08-31 | 2023-10-10 | 成都明夷电子科技有限公司 | High-integration-level broadband high-efficiency power amplifier |
| 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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