CN102364873A - Circuit and method for improving coupling directionality - Google Patents
Circuit and method for improving coupling directionality Download PDFInfo
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- CN102364873A CN102364873A CN2011103339748A CN201110333974A CN102364873A CN 102364873 A CN102364873 A CN 102364873A CN 2011103339748 A CN2011103339748 A CN 2011103339748A CN 201110333974 A CN201110333974 A CN 201110333974A CN 102364873 A CN102364873 A CN 102364873A
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Abstract
The invention relates to a high-power amplifier synthesis circuit, in particular to a circuit and a method for improving coupling directionality. The circuit for improving the coupling directionality comprises ports, a load, a power allocation circuit, two high-power amplifiers and a coupling circuit, wherein the ports comprise an input port, an output port and a reflector port; the input port is connected with the power allocation circuit; the power allocation circuit is connected with the two high-power amplifiers; and the high-power amplifiers are connected with the reflector port by the coupling circuit. When the circuit is used, a coupler is arranged at the front end of an output combination bridge to couple two paths of signals, and the two paths of signals are combined by the output combination bridge. By the circuit and the method, the influence of reflected signals on the coupling circuit is reduced, the directionality of the coupling circuit is greatly improved, problems caused by the absence of proper high-power isolators under high-power conditions are solved, and simultaneously, cost is greatly saved because the isolator is cancelled.
Description
Technical field
The present invention relates to the high power amplifier combiner circuit, particularly a kind of circuit and method that improves the coupling directivity.
Background technology
Along with the development in radio frequency design field, radio frequency applications has got into our various fields in life, and the power of radio-frequency module is also increasingly high, and is also increasingly high to the requirement of coupling circuit directivity, increased the difficulty of coupling circuit.The directivity of coupler is measuring of coupler separate forward and backward-wave component ability; In application, need good directionality usually; Relatively poor directivity will limit the detection precision, even when on straight-through transmission line, having less mismatch, also can cause the change of coupled power level.
Traditional signal coupled modes are to adopt microstrip coupler or dielectric coupler coupling at output port; The mode that adds isolator at output port then realizes; When reflected signal when output reflects; Carry out Signal Spacing by isolator, reflected signal is absorbed through high power load.Because isolator self isolation is limited, so its coupling directivity is not very high.Simultaneously; Along with the raising of booster output, be difficult to the high-power isolator accomplishing advantages of small volume and can satisfy power requirement with present manufacture craft, so the directivity of coupler will be very poor; The as easy as rolling off a log influence that receives the output port reflected signal, thus the signal coupling effect influenced.Hour can behind the coupler at output port place, add isolator at booster output and improve the reverse isolation degree; But when the amplifier high power or when not having suitable isolator; Because the directivity of coupler is limited, the as easy as rolling off a log influence that receives the output reflected signal causes coupling effect bad.
Summary of the invention
Goal of the invention of the present invention is: to the problem that prior art exists, a kind of circuit and method that improves the coupling directivity is provided.
To achieve these goals, the technical scheme of the present invention's employing is:
A kind of circuit that improves the coupling directivity; Comprise port, load, power distributing circuit, two high power amplifiers and coupling circuit; Said port comprises input port, output port and reflector port; Said input port is connected with power distributing circuit, and power distributing circuit connects two high power amplifiers respectively, and high power amplifier is connected with reflector port through coupling circuit.
In the circuit of above-mentioned raising coupling directivity; Said coupling circuit comprises that two couplers and an output closes the road electric bridge; Said coupler closes the road electric bridge through said output and connects output port, and said coupler and said output are closed the road electric bridge respectively through load ground connection.
In the circuit of above-mentioned raising coupling directivity, said coupler is a microstrip line directional coupler.
In the circuit of above-mentioned raising coupling directivity, it is the 3dB electric bridge that the road electric bridge is closed in said output.
In the circuit of above-mentioned raising coupling directivity, said high power amplifier adopts the multichannel synthesis mode.
A kind of method that improves the coupling directivity, method may further comprise the steps:
(1), signal imports from input port, behind power distributing circuit, is divided into two paths of signals;
(2), two paths of signals realizes that through high power amplifier signal amplifies, and gets into coupling circuit more respectively;
(3), two paths of signals is realized the coupling of signal respectively by coupler in the coupling circuit, close the road electric bridge through output at last and close the road;
(4), the electric bridge signal that closes behind the road in ECDC road is exported from output port.
The present invention closes road electric bridge front end through coupler being placed output, and two two paths of signals that high power amplifier produced are respectively by the coupler coupling, closes the mode that the road electric bridge closes the road with output again and realizes the signal coupling.Working as signal particularly imports from input port; Behind power distributing circuit, be divided into two paths of signals; This two paths of signals high power amplifier of respectively hanging oneself again realizes that signal amplifies; Get into coupling circuit again, two paths of signals is realized the coupling of signal respectively by coupler in coupling circuit, closes the road electric bridge through output at last and closes the road; When signal is reflected by reflector port; At first coupler has the isolation greater than 20dB, in addition since electric bridge and output in the coupling circuit to close road electric bridge phase place opposite, its reflected signal absorbs through load; Output port then just is in the isolation end that road electric bridge reflected signal is closed in output; Having reduced the influence of reflected signal, made the directivity of whole coupling circuit be greatly improved coupling circuit, isolation S32 maximum can reach-70～-80dB.
The invention has the beneficial effects as follows: the present invention has reduced the influence of reflected signal to coupling circuit, has improved the directivity of coupling circuit greatly; Both solved the puzzlement that does not have suitable high-power isolator to bring under the high power situation, and removed isolator simultaneously and also practiced thrift cost greatly.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Mark among the figure: D1-input port, D2-reflector port, D3-output port, 1-power distributing circuit, 2-high power amplifier, 3-microstrip line directional coupler, 4-coupling circuit, 5-3dB electric bridge, 6-load.
Practical implementation side
Below in conjunction with accompanying drawing, the present invention is done detailed explanation.
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Embodiment 1
Shown in accompanying drawing 1; The present invention improves the circuit of coupling directivity; Comprise port, load 6, power distributing circuit 1, two high power amplifiers 2 and coupling circuits 4, said port comprises input port D1, output port D3 and reflector port D2, and said input port D1 is connected with power distributing circuit 1; Power distributing circuit 1 connects two high power amplifiers 2 respectively; High power amplifier 2 is connected with reflector port D2 through coupling circuit 4, and said coupling circuit 4 comprises two microstrip line directional couplers 3 and a 3dB electric bridge 5, high power amplifier 2 respectively with coupling circuit 4 in two microstrip line couplers 3 be connected; Said microstrip line directional coupler 3 connects output port D3 through 3dB electric bridge 5 again, and said microstrip line directional coupler 3 and 3dB electric bridge 5 are respectively through load 6 ground connection.When coupling circuit 4 of the present invention specifically is set, may further comprise the steps:
1. according to the actual degree of coupling of product and volume needs,, draw the concrete size of microstrip line coupler 3, when carrying out radio frequency PCB design, be placed on the output of two-way high power amplifier 2 shown in the accompanying drawing 1 through software emulation.
2. select corresponding frequencies and satisfy the 3dB electric bridge 5 of power demand; Make it that two-way microstrip line directional coupler 3 output signals are closed the road; Selection is exported with power amplifier and is closed the identical port of road electric bridge phase place as output, can effectively realize the raising of high power coupling directivity.
The present invention improves the method for coupling directivity; When signal is imported from input port D1; Behind power distributing circuit 1, be divided into two paths of signals, respectively hang oneself again high power amplifier 2 of the two paths of signals that behind power distributing circuit 1, is divided into realizes that signals amplify, and get into coupling circuit 4 again; Two paths of signals is realized the coupling of signals respectively by microstrip line directional coupler 3 in coupling circuit 4, is exported by output port D3 after closing the road through 3dB electric bridge 5 at last.When signal is returned by reflector port D2 reflected signal; At first microstrip line directional coupler 3 has the isolation greater than 20dB, and in addition because the electric bridge in the coupling circuit 4 is opposite with 3dB electric bridge 5 phase places, its reflected signal absorbs through load 6; Output port D3 then just is in the isolation end of 3dB electric bridge 5 reflected signals; Having reduced of the influence of the signal of reflector port D2, made that the directivity of whole coupling circuit 4 is greatly improved coupling circuit 4, isolation S32 maximum can reach-70～-80dB.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
- One kind improve the coupling directivity circuit; Comprise port, load, power distributing circuit, two high power amplifiers and coupling circuit; Said port comprises input port, output port and reflector port; It is characterized in that: said input port is connected with power distributing circuit, and power distributing circuit connects two high power amplifiers respectively, and high power amplifier is connected with reflector port through coupling circuit.
- 2. according to the circuit of the said raising of claim 1 coupling directivity; It is characterized in that: said coupling circuit comprises that two couplers and an output closes the road electric bridge; Said coupler closes the road electric bridge through said output and connects output port, and said coupler and said output are closed the road electric bridge respectively through load ground connection.
- 3. according to the circuit of the said raising coupling of claim 1 directivity, it is characterized in that: said coupler is a microstrip line directional coupler.
- 4. according to the circuit of the said raising coupling of claim 1 directivity, it is characterized in that: it is the 3dB electric bridge that the road electric bridge is closed in said output.
- 5. according to the circuit of the said raising coupling of claim 1 directivity, it is characterized in that: said high power amplifier adopts the multichannel synthesis mode.
- One kind improve the coupling directivity method, it is characterized in that: method may further comprise the steps:(1), signal imports from input port, behind power distributing circuit, is divided into two paths of signals;(2), two paths of signals realizes that through high power amplifier signal amplifies, and gets into coupling circuit more respectively;(3), two paths of signals is realized the coupling of signal respectively by coupler in the coupling circuit, close the road electric bridge through output at last and close the road;(4), the electric bridge signal that closes behind the road in ECDC road is exported from output port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110333974.8A CN102364873B (en) | 2011-10-28 | 2011-10-28 | Circuit and method for improving coupling directionality |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110333974.8A CN102364873B (en) | 2011-10-28 | 2011-10-28 | Circuit and method for improving coupling directionality |
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| Publication Number | Publication Date |
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| CN102364873A true CN102364873A (en) | 2012-02-29 |
| CN102364873B CN102364873B (en) | 2014-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110333974.8A Active CN102364873B (en) | 2011-10-28 | 2011-10-28 | Circuit and method for improving coupling directionality |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261671A (en) * | 2019-07-15 | 2019-09-20 | 中国计量科学研究院 | A kind of microwave power quantum measurement method and vacuum cavity measuring device |
| CN110299928A (en) * | 2019-06-19 | 2019-10-01 | 中国电子科技集团公司第三十八研究所 | A kind of spaceborne broadband rf front end of the high power of high reliability |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201518470U (en) * | 2009-08-03 | 2010-06-30 | 中国电子科技集团公司第五十四研究所 | LED wave band broad-band power amplifier |
| CN201699655U (en) * | 2010-06-11 | 2011-01-05 | 福建三元达通讯股份有限公司 | Power amplifying device and equipment of UHF digital television transmitter |
| CN201821426U (en) * | 2010-06-29 | 2011-05-04 | 福建三元达通讯股份有限公司 | UHF (ultra-high-frequency) digital television transmitter power amplification device and power amplification equipment |
-
2011
- 2011-10-28 CN CN201110333974.8A patent/CN102364873B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201518470U (en) * | 2009-08-03 | 2010-06-30 | 中国电子科技集团公司第五十四研究所 | LED wave band broad-band power amplifier |
| CN201699655U (en) * | 2010-06-11 | 2011-01-05 | 福建三元达通讯股份有限公司 | Power amplifying device and equipment of UHF digital television transmitter |
| CN201821426U (en) * | 2010-06-29 | 2011-05-04 | 福建三元达通讯股份有限公司 | UHF (ultra-high-frequency) digital television transmitter power amplification device and power amplification equipment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299928A (en) * | 2019-06-19 | 2019-10-01 | 中国电子科技集团公司第三十八研究所 | A kind of spaceborne broadband rf front end of the high power of high reliability |
| CN110261671A (en) * | 2019-07-15 | 2019-09-20 | 中国计量科学研究院 | A kind of microwave power quantum measurement method and vacuum cavity measuring device |
| CN110261671B (en) * | 2019-07-15 | 2021-07-27 | 中国计量科学研究院 | Microwave power quantum measurement method and vacuum cavity measurement device |
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| Publication number | Publication date |
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| CN102364873B (en) | 2014-02-26 |
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Address after: 610041, Sichuan high tech Zone, Chengdu Tianfu Road, South extension line, high-tech incubator Park, building 3, 6 Applicant after: Chengdu NTS Technology Co., Ltd. Address before: 610041, Sichuan high tech Zone, Chengdu Tianfu Road, South extension line, high-tech incubator Park, building 3, 6 Applicant before: NTS Technology (Chengdu) Co., Ltd. |
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Effective date of registration: 20201126 Address after: 610000 No.6 building, hi tech Incubation Park, north section of Tianfu Avenue, Chengdu, Sichuan Province Patentee after: CHENGDU NTS SOFTWARE Co.,Ltd. Address before: 610041, Sichuan high tech Zone, Chengdu Tianfu Road, South extension line, high-tech incubator Park, building 3, 6 Patentee before: CHENGDU NTS TECHNOLOGY Co.,Ltd. |
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