CN105119573A - Microwave frequency conversion power division circuit - Google Patents
Microwave frequency conversion power division circuit Download PDFInfo
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- CN105119573A CN105119573A CN201510562834.6A CN201510562834A CN105119573A CN 105119573 A CN105119573 A CN 105119573A CN 201510562834 A CN201510562834 A CN 201510562834A CN 105119573 A CN105119573 A CN 105119573A
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Abstract
The invention discloses a microwave frequency conversion power division circuit, comprising a first intermediate frequency amplification circuit, a second intermediate frequency amplification circuit and a switching circuit. The first intermediate frequency amplification circuit is used for amplifying an intermediate frequency signal formed by processing a first polar signal in a first mixer circuit; the second intermediate frequency amplification circuit is used for amplifying an intermediate frequency signal formed by processing a second polar signal in a second mixer circuit; the switching circuit is respectively connected with the first intermediate frequency amplification circuit and the second intermediate frequency amplification circuit, and is used for switching to output the signals of needed frequency bands; the first intermediate frequency amplification circuit and the second intermediate frequency amplification circuit are designed symmetrically. According to the invention, full band receiving of Ku wave band is realized, the first intermediate frequency amplification circuit and the second intermediate frequency amplification circuit are designed symmetrically, dispersion points of power division of the circuit are reduced, length inconsistency of output signal lines of the circuit is avoided, power division line loss is reduced, matching and unification of power amplification elements is realized, moreover, the circuit is formed through simple layout and clear thinking, is convenient to analyze and has high reliability.
Description
Technical field
The present invention relates to microwave converter technique field, particularly relate to a kind of microwave frequency conversion merit parallel circuit.
Background technology
Along with the fast development of electronic technology, the producer that microwave communication industry uses frequency converter to realize microwave signal process gets more and more, but the design of the design, particularly intermediate frequency amplifier circuit of existing microwave frequency conversion merit parallel circuit is larger on electrical characteristics impact.Because its output signal line length differs, signals disperse point is more, causes merit point line loss comparatively large, power amplification element coupling disunity.
Summary of the invention
The invention provides a kind of microwave frequency conversion merit parallel circuit, solve existing microwave frequency conversion merit parallel circuit line loss comparatively large, power amplification element mates skimble-scamble technical problem.
The present invention is by the following technical solutions:
First aspect, the invention provides a kind of microwave frequency conversion merit parallel circuit, comprises the first intermediate frequency amplifier circuit, the second intermediate frequency amplifier circuit and commutation circuit,
Described first intermediate frequency amplifier circuit is used for the intermediate-freuqncy signal that the first polar signal obtains after the first mixting circuit to amplify, described second intermediate frequency amplifier circuit is used for the intermediate-freuqncy signal that the second polar signal obtains after the second mixting circuit to amplify, described commutation circuit is connected with described first intermediate frequency amplifier circuit and the second intermediate frequency amplifier circuit respectively, for switching the frequency band signals, described first intermediate frequency amplifier circuit and the second intermediate frequency amplifier circuit symmetric design that export and need.
Further, described first intermediate frequency amplifier circuit comprises the first amplification branch road and second and amplifies branch road, described first amplifies branch road is connected with the first output of described first mixting circuit, described second amplifies branch road is connected with the second output of described first mixting circuit, described first amplifies branch road comprises power amplifying device, the output of described power amplifying device is connected with the first link of the first resistance and the second link respectively by the first electric capacity, first link of described first resistance is connected with the first link of the second resistance and the second link respectively, first link of described second resistance is connected with described commutation circuit by the second electric capacity, second link of described second resistance is connected with described commutation circuit by the 3rd electric capacity, second link of described first resistance is connected with the first link of the 3rd resistance and the second link respectively, first link of described 3rd resistance is connected with described commutation circuit by the 4th electric capacity, second link of described 3rd resistance is connected with described commutation circuit by the 5th electric capacity, the circuit structure that described second circuit structure and described first amplifying branch road amplifies branch road is identical.
Further, described second intermediate frequency amplifier circuit comprises the 3rd and amplifies branch road and the 4th amplification branch road, described 3rd input amplifying branch road is connected with the first output of described second mixting circuit, described 4th amplifies branch road is connected with the second output of described second mixting circuit, and described 3rd amplification branch road is identical with the circuit structure that the 4th amplifies branch road all amplifies branch road circuit structure with described first.
Further, described commutation circuit comprises four switching circuits, four described switching circuit symmetric designs, described first four tunnels of amplifying branch road export and are connected with four described switching circuits respectively, described second four tunnels of amplifying branch road export and are connected with four described switching circuits respectively, described 3rd four tunnels of amplifying branch road export and are connected with four described switching circuits respectively, described 4th four tunnels of amplifying branch road export and are connected with four described switching circuits respectively, and each described switching circuit comprises two signal output parts.
Further, also comprise radio frequency amplifying circuit, described radio frequency amplifying circuit comprises the first radio frequency amplifying circuit and the second radio frequency amplifying circuit, described first radio frequency amplifying circuit is used for the first polar signal received to amplify to be delivered to described first mixting circuit, and described second radio frequency amplifying circuit is used for the second polar signal received to amplify to be delivered to described second mixting circuit.
Further, also comprise the 3rd intermediate frequency amplifier circuit, the input of described 3rd intermediate frequency amplifier circuit is connected with the output of described commutation circuit, for amplifying the intermediate-freuqncy signal that described commutation circuit exports, described 3rd intermediate frequency amplifier circuit symmetric design.
Technical scheme provided by the invention brings following beneficial effect:
First mixting circuit carries out filtering to the first polar signal, and carry out difference frequency mixing with local frequency and obtain intermediate-freuqncy signal, by the first intermediate frequency amplifier circuit, this intermediate-freuqncy signal is amplified, second mixting circuit carries out filtering to the second polar signal, and carry out difference frequency mixing with local frequency and obtain intermediate-freuqncy signal, by the second intermediate frequency amplifier circuit, this intermediate-freuqncy signal is amplified, the frequency signal selecting to need to export is switched by commutation circuit, realize Ku wave band Whole frequency band to receive, first intermediate frequency amplifier circuit and the second intermediate frequency amplifier circuit symmetric design, decrease circuit merit and divide spaced point, avoid its output signal line length to differ, reduce merit point line loss, realize power amplification element coupling unified, and the simple clear thinking of this circuit layout, be convenient to analyze, reliability is high.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the present invention, below the accompanying drawing used required in describing the present invention is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to content of the present invention and these accompanying drawings.
Fig. 1 is the block diagram of microwave frequency conversion merit parallel circuit provided by the invention.
Fig. 2 is the first intermediate frequency amplifier circuit of microwave frequency conversion merit parallel circuit provided by the invention and the circuit theory diagrams of the second intermediate frequency amplifier circuit.
Fig. 3 is the circuit theory diagrams of the radio frequency amplifying circuit of microwave frequency conversion merit parallel circuit provided by the invention.
Embodiment
The technical problem solved for making the present invention, the technical scheme of employing and the technique effect that reaches are clearly, below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those skilled in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Present satellite-based system is increasingly used for TV transmission program.Usually, One Earth One Family synchronous satellite receives ground signal, and down link signal is to the ground-plane antenna being positioned at satellite coverage.Ground-plane antenna generally includes a parabolic antenna and for amplification, filtering, is the intermediate frequency low noise module that can be coupled with receiver by the frequency inverted of Received signal strength.
In order to increase the bandwidth from satellite-signal, signal sends at the two poles of the earth.Such as, the bandwidth of satellite-signal can be made to double when the two poles of the earth are out-phase 90 °.They by single polarized signal separately, and must be sent to corresponding receiving element by ground-plane antenna.
Fig. 1 is the block diagram of microwave frequency conversion merit parallel circuit provided by the invention.Fig. 2 is the first intermediate frequency amplifier circuit of microwave frequency conversion merit parallel circuit provided by the invention and the circuit theory diagrams of the second intermediate frequency amplifier circuit.Composition graphs 1, shown in Fig. 2, this microwave frequency conversion merit parallel circuit comprises the first intermediate frequency amplifier circuit 10, second intermediate frequency amplifier circuit 11 and commutation circuit 20, described first intermediate frequency amplifier circuit 10 is amplified for the intermediate-freuqncy signal obtained after the first mixting circuit 30 by the first polar signal, described second intermediate frequency amplifier circuit 11 is amplified for the intermediate-freuqncy signal obtained after the second mixting circuit 31 by the second polar signal, described commutation circuit 20 is connected with described first intermediate frequency amplifier circuit 10 and the second intermediate frequency amplifier circuit 11 respectively, for switching the frequency band signals exporting and need, described first intermediate frequency amplifier circuit 10 and the second intermediate frequency amplifier circuit 11 symmetric design.Wherein, in the present embodiment, the first polar signal is the signal of horizontal polarization, second polar signal is the signal of perpendicular polarization, certainly, in some other embodiment, first polar signal can be the signal of perpendicular polarization, and the second polar signal can be the signal of horizontal polarization.
First mixting circuit 30 of this microwave frequency conversion merit parallel circuit carries out filtering to the first polar signal, and carry out difference frequency mixing with local frequency and obtain intermediate-freuqncy signal, by the first intermediate frequency amplifier circuit 10, this intermediate-freuqncy signal is amplified, second mixting circuit 31 carries out filtering to the second polar signal, and carry out difference frequency mixing with local frequency and obtain intermediate-freuqncy signal, by the second intermediate frequency amplifier circuit 11, this intermediate-freuqncy signal is amplified, the frequency signal selecting to need to export is switched by commutation circuit 20, realize Ku wave band Whole frequency band to receive, first intermediate frequency amplifier circuit 10 and the second intermediate frequency amplifier circuit 11 symmetric design, decrease circuit merit and divide spaced point, avoid its output signal line length to differ, reduce merit point line loss, realize power amplification element coupling unified, and the simple clear thinking of this circuit layout, be convenient to analyze, reliability is high.
Particularly, local frequency comprises low-frequency band local frequency and high frequency band local frequency.Start-oscillation circuit field effect transistor 4009 and the common corequake of ceramic resonator go out low-frequency band local frequency 9.75GHZ, and start-oscillation circuit field effect transistor 5508 and the common corequake of ceramic resonator go out high frequency band local frequency 10.6GHZ.First mixting circuit 30 comprises two image-reject filters, obtains low band signal: 10.7GHZ-11.7GHZ after the first polar signal is carried out filtering; High-frequency band signals: 11.7GHZ-12.75GHZ.Equally, the second mixting circuit 31 comprises two image-reject filters, obtains low band signal: 10.7GHZ-11.7GHZ after the second polar signal is carried out filtering; High-frequency band signals: 11.7GHZ-12.75GHZ.Filtered low band signal and low-frequency band local frequency are carried out difference frequency mixing and are obtained low-frequency band intermediate-freuqncy signal: 10.7GHZ-9.75GHZ=0.95GHZ, 11.7GHZ-9.75GHZ=1.95GHZ; Filtered high-frequency band signals and high frequency band local frequency are carried out difference frequency mixing and are obtained high frequency band intermediate-freuqncy signal: 11.7GHZ-10.6GHZ=1.1GHZ, 12.75GHZ-10.6GHZ=2.15GHZ.Exported by the switching of commutation circuit 20, Ku wave band Whole frequency band can be realized and receive.
In the present embodiment, microwave frequency conversion merit parallel circuit also comprises the 3rd intermediate frequency amplifier circuit 50, the input of described 3rd intermediate frequency amplifier circuit 50 is connected with the output of described commutation circuit 20, for amplifying the intermediate-freuqncy signal that described commutation circuit 20 exports, described 3rd intermediate frequency amplifier circuit 50 symmetric design.Affect circuit gain owing to having signal power loss after the signal that commutation circuit 20 switching exports, amplified by the 3rd intermediate frequency amplifier circuit 50, intermediate-freuqncy signal is amplified to optimum state and is transferred to receiver.
Preferably, described first intermediate frequency amplifier circuit 10 comprises the first amplification branch road 100 and second and amplifies branch road 101, described first amplifies branch road 100 is connected with the first output of described first mixting circuit 30, described second amplifies branch road 101 is connected with the second output of described first mixting circuit 30, described first amplifies branch road 100 comprises power amplifying device U6, the output of described power amplifying device U6 is connected with first link of the first resistance R22 and the second link respectively by the first electric capacity C36, first link of described first resistance R22 is connected with first link of the second resistance R24 and the second link respectively, first link of described second resistance R24 is connected with described commutation circuit 20 by the second electric capacity C38, second link of described second resistance R24 is connected with described commutation circuit 20 by the 3rd electric capacity C39, second link of described first resistance R22 is connected with first link of the 3rd resistance R25 and the second link respectively, first link of described 3rd resistance R25 is connected with described commutation circuit 20 by the 4th electric capacity C40, second link of described 3rd resistance R25 is connected with described commutation circuit 20 by the 5th electric capacity C41, the circuit structure that described second circuit structure and described first amplifying branch road 101 amplifies branch road 100 is identical, second amplifies branch road 101 comprises power amplifying device U7, the output of described power amplifying device U7 is connected with first link of the first resistance R23 and the second link respectively by the first electric capacity C47, first link of described first resistance R23 is connected with first link of the second resistance R26 and the second link respectively, first link of described second resistance R26 is connected with described commutation circuit 20 by the second electric capacity C42, second link of described second resistance R26 is connected with described commutation circuit 20 by the 3rd electric capacity C43, second link of described first resistance R23 is connected with first link of the 3rd resistance R27 and the second link respectively, first link of described 3rd resistance R27 is connected with described commutation circuit 20 by the 4th electric capacity C44, second link of described 3rd resistance R27 is connected with described commutation circuit 20 by the 5th electric capacity C45.
Described second intermediate frequency amplifier circuit 11 comprises the 3rd and amplifies branch road 110 and the 4th amplification branch road 111, described 3rd input amplifying branch road 110 is connected with the first output of described second mixting circuit 31, described 4th amplifies branch road 111 is connected with the second output of described second mixting circuit 31, and described 3rd amplification branch road 110 is identical with the circuit structure that the circuit structure and described first that the 4th amplifies branch road 111 amplifies branch road 100.Described 3rd amplifies branch road 110 comprises power amplifying device U6, the output of described power amplifying device U6 is connected with first link of the first resistance R22 and the second link respectively by the first electric capacity C36, first link of described first resistance R22 is connected with first link of the second resistance R24 and the second link respectively, first link of described second resistance R24 is connected with described commutation circuit 20 by the second electric capacity C38, second link of described second resistance R24 is connected with described commutation circuit 20 by the 3rd electric capacity C39, second link of described first resistance R22 is connected with first link of the 3rd resistance R25 and the second link respectively, first link of described 3rd resistance R25 is connected with described commutation circuit 20 by the 4th electric capacity C40, second link of described 3rd resistance R25 is connected with described commutation circuit 20 by the 5th electric capacity C41, 4th amplifies branch road 111 comprises power amplifying device U7, the output of described power amplifying device U7 is connected with first link of the first resistance R23 and the second link respectively by the first electric capacity C47, first link of described first resistance R23 is connected with first link of the second resistance R26 and the second link respectively, first link of described second resistance R26 is connected with described commutation circuit 20 by the second electric capacity C42, second link of described second resistance R26 is connected with described commutation circuit 20 by the 3rd electric capacity C43, second link of described first resistance R23 is connected with first link of the 3rd resistance R27 and the second link respectively, first link of described 3rd resistance R27 is connected with described commutation circuit 20 by the 4th electric capacity C44, second link of described 3rd resistance R27 is connected with described commutation circuit 20 by the 5th electric capacity C45.
It is identical that first amplifies branch road 100, second amplification branch road 101, the 3rd amplification branch road 110 and the 4th amplifies branch road 111 circuit structure, symmetric design, decrease circuit merit and divide spaced point, avoid its output signal line length to differ, reduce merit point line loss, realize power amplification element coupling unified.
Preferably, described commutation circuit 20 comprises four switching circuits 200, and A7533 chip selected by switching circuit 200.Four described switching circuit 200 symmetric designs, described first four tunnels of amplifying branch road 100 export switching circuit 200 described with four respectively and are connected, described second four tunnels of amplifying branch road 101 export switching circuit 200 described with four respectively and are connected, described 3rd four tunnels of amplifying branch road 110 export switching circuit 200 described with four respectively and are connected, described 4th four tunnels of amplifying branch road 111 export switching circuit 200 described with four respectively and are connected, and each described switching circuit 200 comprises two signal output parts.First amplification branch road 100 and the second amplification branch road 101 and the 3rd amplify branch road 110 and the 4th and amplify branch road 111 and four switching circuit 200 line almost symmetries, same length, avoid its output signal line length and differ, reduce merit point line loss.
Fig. 3 is the circuit theory diagrams of the radio frequency amplifying circuit of microwave frequency conversion merit parallel circuit provided by the invention.Shown in figure 3, preferably, microwave frequency conversion merit parallel circuit also comprises radio frequency amplifying circuit 40, described radio frequency amplifying circuit 40 comprises the first radio frequency amplifying circuit 400 and the second radio frequency amplifying circuit 401, described first radio frequency amplifying circuit 400 is delivered to described first mixting circuit 30 for being amplified by the receive first polar signal, and described second radio frequency amplifying circuit 401 is delivered to described second mixting circuit 31 for being amplified by the receive second polar signal.Particularly, first radio frequency amplifying circuit 400 is identical with the second radio frequency amplifying circuit 401 circuit structure, include third stage amplifier, NE3512 field effect transistor selected by first order amplifier, NE3503 field effect transistor all selected by second level amplifier and the 3rd pole amplifier, for first order amplifier, second level amplifier and the 3rd pole amplifier provide applicable grid bias, ensure the stabilization of operating point of first order amplifier, second level amplifier and the 3rd pole amplifier, make first order amplifier, second level amplifier and the 3rd pole amplifier noise low, operating state is better.
Above content is only preferred embodiment of the present invention, and for those of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, this description should not be construed as limitation of the present invention.
Claims (6)
1. a microwave frequency conversion merit parallel circuit, is characterized in that, comprises the first intermediate frequency amplifier circuit, the second intermediate frequency amplifier circuit and commutation circuit,
Described first intermediate frequency amplifier circuit is used for the intermediate-freuqncy signal that the first polar signal obtains after the first mixting circuit to amplify, described second intermediate frequency amplifier circuit is used for the intermediate-freuqncy signal that the second polar signal obtains after the second mixting circuit to amplify, described commutation circuit is connected with described first intermediate frequency amplifier circuit and the second intermediate frequency amplifier circuit respectively, for switching the frequency band signals, described first intermediate frequency amplifier circuit and the second intermediate frequency amplifier circuit symmetric design that export and need.
2. microwave frequency conversion merit parallel circuit according to claim 1, it is characterized in that, described first intermediate frequency amplifier circuit comprises the first amplification branch road and second and amplifies branch road, described first amplifies branch road is connected with the first output of described first mixting circuit, described second amplifies branch road is connected with the second output of described first mixting circuit, described first amplifies branch road comprises power amplifying device, the output of described power amplifying device is connected with the first link of the first resistance and the second link respectively by the first electric capacity, first link of described first resistance is connected with the first link of the second resistance and the second link respectively, first link of described second resistance is connected with described commutation circuit by the second electric capacity, second link of described second resistance is connected with described commutation circuit by the 3rd electric capacity, second link of described first resistance is connected with the first link of the 3rd resistance and the second link respectively, first link of described 3rd resistance is connected with described commutation circuit by the 4th electric capacity, second link of described 3rd resistance is connected with described commutation circuit by the 5th electric capacity, the circuit structure that described second circuit structure and described first amplifying branch road amplifies branch road is identical.
3. microwave frequency conversion merit parallel circuit according to claim 2, it is characterized in that, described second intermediate frequency amplifier circuit comprises the 3rd and amplifies branch road and the 4th amplification branch road, described 3rd input amplifying branch road is connected with the first output of described second mixting circuit, described 4th amplifies branch road is connected with the second output of described second mixting circuit, and described 3rd amplification branch road is identical with the circuit structure that the 4th amplifies branch road all amplifies branch road circuit structure with described first.
4. microwave frequency conversion merit parallel circuit according to claim 3, it is characterized in that, described commutation circuit comprises four switching circuits, four described switching circuit symmetric designs, described first four tunnels of amplifying branch road export and are connected with four described switching circuits respectively, described second four tunnels of amplifying branch road export and are connected with four described switching circuits respectively, described 3rd four tunnels of amplifying branch road export and are connected with four described switching circuits respectively, described 4th four tunnels of amplifying branch road export and are connected with four described switching circuits respectively, each described switching circuit comprises two signal output parts.
5. microwave frequency conversion merit parallel circuit according to claim 1, it is characterized in that, also comprise radio frequency amplifying circuit, described radio frequency amplifying circuit comprises the first radio frequency amplifying circuit and the second radio frequency amplifying circuit, described first radio frequency amplifying circuit is used for the first polar signal received to amplify to be delivered to described first mixting circuit, and described second radio frequency amplifying circuit is used for the second polar signal received to amplify to be delivered to described second mixting circuit.
6. microwave frequency conversion merit parallel circuit according to claim 1, it is characterized in that, also comprise the 3rd intermediate frequency amplifier circuit, the input of described 3rd intermediate frequency amplifier circuit is connected with the output of described commutation circuit, for amplifying the intermediate-freuqncy signal that described commutation circuit exports, described 3rd intermediate frequency amplifier circuit symmetric design.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510562834.6A CN105119573B (en) | 2015-09-07 | 2015-09-07 | A kind of microwave frequency conversion power-devided circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510562834.6A CN105119573B (en) | 2015-09-07 | 2015-09-07 | A kind of microwave frequency conversion power-devided circuit |
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| Publication Number | Publication Date |
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| CN105119573A true CN105119573A (en) | 2015-12-02 |
| CN105119573B CN105119573B (en) | 2018-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510562834.6A Expired - Fee Related CN105119573B (en) | 2015-09-07 | 2015-09-07 | A kind of microwave frequency conversion power-devided circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106656228A (en) * | 2016-11-25 | 2017-05-10 | 华讯方舟科技（湖北）有限公司 | Four-output microwave frequency conversion circuit and four-output frequency converter |
| CN107294547A (en) * | 2017-08-07 | 2017-10-24 | 华讯方舟科技有限公司 | A kind of microwave frequency changer circuit and microwave converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130823A (en) * | 1995-03-06 | 1996-09-11 | 郑永裕 | Satellite receiving tuner with band broadness changeable demodulation circuit |
| CN1272247A (en) * | 1997-09-29 | 2000-11-01 | 艾利森公司 | Dual-band dual-mode power amplifier |
| CN201887760U (en) * | 2010-12-02 | 2011-06-29 | 中国电子科技集团公司第五十四研究所 | UHF range miniaturized broadband multifunctional frequency-hopping transceiver |
| CN205017274U (en) * | 2015-09-07 | 2016-02-03 | 华讯方舟科技（湖北）有限公司 | Microwave frequency conversion merit parallel circuit |
-
2015
- 2015-09-07 CN CN201510562834.6A patent/CN105119573B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130823A (en) * | 1995-03-06 | 1996-09-11 | 郑永裕 | Satellite receiving tuner with band broadness changeable demodulation circuit |
| CN1272247A (en) * | 1997-09-29 | 2000-11-01 | 艾利森公司 | Dual-band dual-mode power amplifier |
| CN201887760U (en) * | 2010-12-02 | 2011-06-29 | 中国电子科技集团公司第五十四研究所 | UHF range miniaturized broadband multifunctional frequency-hopping transceiver |
| CN205017274U (en) * | 2015-09-07 | 2016-02-03 | 华讯方舟科技（湖北）有限公司 | Microwave frequency conversion merit parallel circuit |
Non-Patent Citations (1)
| Title |
|---|
| 周治良等: "超外差直接混频雷达接收机前中放大电路研究", 《电测与仪表》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106656228A (en) * | 2016-11-25 | 2017-05-10 | 华讯方舟科技（湖北）有限公司 | Four-output microwave frequency conversion circuit and four-output frequency converter |
| CN107294547A (en) * | 2017-08-07 | 2017-10-24 | 华讯方舟科技有限公司 | A kind of microwave frequency changer circuit and microwave converter |
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| CN105119573B (en) | 2018-01-12 |
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