CN102364873B - Circuit and method for improving coupling directionality - Google Patents
Circuit and method for improving coupling directionality Download PDFInfo
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- CN102364873B CN102364873B CN201110333974.8A CN201110333974A CN102364873B CN 102364873 B CN102364873 B CN 102364873B CN 201110333974 A CN201110333974 A CN 201110333974A CN 102364873 B CN102364873 B CN 102364873B
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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 high power amplifier combiner circuit, particularly a kind of circuit and method that improves coupling directionality.
Background technology
Along with the development in radio frequency design field, radio frequency applications has entered the every field of our life, and the power of radio-frequency module is also more and more higher, also more and more higher to the requirement of coupling circuit directivity, has increased the difficulty of coupling circuit.The directivity of coupler is measuring of coupler separate forward and backward-wave component ability, in application, conventionally need good directionality, poor directivity will limit detection precision, while even there is less mismatch on straight-through transmission line, also can cause the change of coupled power level.
Traditional signal coupling mode is to adopt microstrip coupler or dielectric coupler coupling at output port, then the mode that adds isolator at output port realizes, when reflected signal reflects from output, by isolator, carry out signal isolation, reflected signal is absorbed by high power load.Because isolator self isolation is limited, so its coupling directionality is not very high.Simultaneously, along with the raising of booster output, with current manufacture craft, be difficult to accomplish that volume is small and exquisite and can meet the high-power isolator of power requirement, so the directivity of coupler will be very poor, the as easy as rolling off a log impact that is subject to output port reflected signal, thus signal coupling effect affected.At booster output, hour can after the coupler at output port place, add isolator and improve reverse isolation degree, but when amplifier high power or while there is no suitable isolator, because the directivity of coupler is limited, the as easy as rolling off a log impact that is subject to output reflected signal, causes coupling effect bad.
Summary of the invention
Goal of the invention of the present invention is: the problem existing for prior art, provides a kind of circuit and method that improves coupling directionality.
To achieve these goals, the technical solution used in the present invention is:
A kind of circuit that improves coupling directionality, comprise port, load, power distributing circuit, two high power amplifiers and coupling circuit, described port comprises input port, output port and reflector port, described input port is connected with power distributing circuit, power distributing circuit connects respectively two high power amplifiers, high power amplifier is connected with reflector port through coupling circuit, described coupling circuit comprises that two couplers and an output closes road electric bridge, described coupler closes road electric bridge by described output and connects output port, described coupler and described output are closed road electric bridge respectively by load ground connection.
In the circuit of above-mentioned raising coupling directionality, described coupler is microstrip line directional coupler.
In the circuit of above-mentioned raising coupling directionality, it is 3dB electric bridge that road electric bridge is closed in described output.
In the circuit of above-mentioned raising coupling directionality, described high power amplifier adopts multichannel synthesis mode.
A method that improves coupling directionality, method comprises the following steps:
(1), signal inputs from input port, is divided into two paths of signals after power distributing circuit;
(2), two paths of signals is realized signal through high power amplifier respectively and is amplified, then enters coupling circuit;
(3), two paths of signals is realized respectively the coupling of signal by coupler in coupling circuit, last
By output, close road electric bridge and close road;
(4), the signal behind ECDC road electric bridge combination road is exported from output port.
The present invention closes road electric bridge front end by coupler being placed in to output, and the two paths of signals that two high power amplifiers produce is coupled by coupler respectively, then closes the mode that road electric bridge closes road and realize signal coupling with exporting.Particularly when signal is inputted from input port, after power distributing circuit, be divided into two paths of signals, this two paths of signals high power amplifier of respectively hanging oneself is again realized signal and is amplified, enter again coupling circuit, in coupling circuit, two paths of signals is realized respectively the coupling of signal by coupler, finally by output, closes road electric bridge and closes road; When signal is reflected by reflector port, first coupler has the isolation that is greater than 20dB, in addition because road electric bridge single spin-echo is closed in the electric bridge in coupling circuit and output, its reflected signal absorbs by load, output port just closes the isolation end of road electric bridge reflected signal in output, reduced the impact of reflected signal on coupling circuit, the directivity of whole coupling circuit is greatly improved, isolation S32 maximum can reach-70～-80dB.
The invention has the beneficial effects as follows: the present invention has reduced the impact of reflected signal on coupling circuit, improved greatly the directivity of coupling circuit; Both solved the puzzlement that does not have suitable high-power isolator to bring in high power situation, and removed isolator simultaneously and also saved greatly cost.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Mark in 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.
Specific embodiment party
Below in conjunction with accompanying drawing, the present invention is described in detail.
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Embodiment 1
As shown in Figure 1, the present invention improves the circuit of coupling directionality, comprise port, load 6, power distributing circuit 1, two high power amplifiers 2 and coupling circuit 4, described port comprises input port D1, output port D3 and reflector port D2, described input port D1 is connected with power distributing circuit 1, power distributing circuit 1 connects respectively two high power amplifiers 2, high power amplifier 2 is connected with reflector port D2 through coupling circuit 4, described coupling circuit 4 comprises two microstrip line directional couplers 3 and a 3dB electric bridge 5, high power amplifier 2 is connected with two microstrip line couplers 3 in coupling circuit 4 respectively, described microstrip line directional coupler 3 connects output port D3 by 3dB electric bridge 5 again, described microstrip line directional coupler 3 and 3dB electric bridge 5 are respectively by load 6 ground connection.While specifically coupling circuit 4 of the present invention being set, comprise the following steps:
1. according to the actual degree of coupling of product and volume needs, by software emulation, 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 accompanying drawing 1.
2. select corresponding frequencies and meet the 3dB electric bridge 5 of power demand, make it that two-way microstrip line directional coupler 3 output signals are closed to road, select and power amplifier is exported and closed port that road electric bridge phase place is identical as output, can effectively realize the raising of high power coupling directionality.
The present invention improves the method for coupling directionality, when signal is inputted from input port D1, after power distributing circuit 1, be divided into two paths of signals, the two paths of signals being divided into after power distributing circuit 1 high power amplifier 2 of respectively hanging oneself is again realized signal and is amplified, enter again coupling circuit 4, in coupling circuit 4, two paths of signals is realized respectively the coupling of signal by microstrip line directional coupler 3, is exported after finally closing road by 3dB electric bridge 5 by output port D3.When signal is returned by reflector port D2 reflected signal, first microstrip line directional coupler 3 has the isolation that is greater than 20dB, in addition due to the electric bridge in coupling circuit 4 and 3dB electric bridge 5 single spin-echos, its reflected signal absorbs by load 6, output port D3 is the isolation end in 3dB electric bridge 5 reflected signals just, the impact of the signal that has reduced reflector port D2 on coupling circuit 4, is greatly improved the directivity of whole coupling circuit 4, and isolation S32 maximum can reach-70～-80dB.The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. a circuit that improves coupling directionality, comprise port, load, power distributing circuit, two high power amplifiers and coupling circuit, described port comprises input port, output port and reflector port, described input port is connected with power distributing circuit, power distributing circuit connects respectively two high power amplifiers, high power amplifier is connected with reflector port through coupling circuit, it is characterized in that: described coupling circuit comprises that two couplers and an output closes road electric bridge, described coupler closes road electric bridge by described output and connects output port, described coupler and described output are closed road electric bridge respectively by load ground connection.
2. improve according to claim 1 the circuit of coupling directionality, it is characterized in that: described coupler is microstrip line directional coupler.
3. improve according to claim 1 the circuit of coupling directionality, it is characterized in that: it is 3dB electric bridge that road electric bridge is closed in described output.
4. improve according to claim 1 the circuit of coupling directionality, it is characterized in that: described high power amplifier adopts multichannel synthesis mode.
5. a method that improves coupling directionality, is characterized in that: method comprises the following steps:
(1), signal inputs from input port, is divided into two paths of signals after power distributing circuit;
(2), two paths of signals is realized signal through high power amplifier respectively and is amplified, then enters coupling circuit;
(3), two paths of signals is realized respectively the coupling of signal by coupler in coupling circuit, finally by output, close road electric bridge and close road;
(4), the signal behind ECDC road electric bridge combination 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 CN102364873A (en) | 2012-02-29 |
| CN102364873B true CN102364873B (en) | 2014-02-26 |
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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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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110299928B (en) * | 2019-06-19 | 2021-02-23 | 中国电子科技集团公司第三十八研究所 | High-reliability high-power satellite-borne broadband radio frequency front end |
| 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 |
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 |
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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 |
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| CN102364873A (en) | 2012-02-29 |
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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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Free format text: CORRECT: APPLICANT; FROM: NTS TECHNOLOGY (CHENGDU) CO., LTD. TO: CHENGDU NTS TECHNOLOGY 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. |