CN105119573B - A kind of microwave frequency conversion power-devided circuit - Google Patents
A kind of microwave frequency conversion power-devided circuit Download PDFInfo
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- CN105119573B CN105119573B CN201510562834.6A CN201510562834A CN105119573B CN 105119573 B CN105119573 B CN 105119573B CN 201510562834 A CN201510562834 A CN 201510562834A CN 105119573 B CN105119573 B CN 105119573B
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Abstract
The invention discloses a kind of microwave frequency conversion power-devided circuit, including the first IF amplifier circuit, second IF amplifier circuit and switching circuit, first IF amplifier circuit is used to the intermediate-freuqncy signal that the first polar signal obtains after the first mixting circuit being amplified, second IF amplifier circuit is used to the intermediate-freuqncy signal that the second polar signal obtains after the second mixting circuit being amplified, the switching circuit is connected with the first IF amplifier circuit and the second IF amplifier circuit respectively, the frequency band signals needed for switching output, first IF amplifier circuit and the second IF amplifier circuit symmetric design.The present invention realizes the reception of Ku wave bands Whole frequency band, first IF amplifier circuit and the second IF amplifier circuit symmetric design, reduce circuit work(and divide spaced point, its output signal line length is avoided to differ, the loss of work(separated time road is reduced, realizes that power amplification element matching is unified, and the simple clear thinking of the circuit layout, it is easy to analyze, reliability is high.
Description
Technical field
The present invention relates to microwave converter technique field, more particularly to a kind of microwave frequency conversion power-devided circuit.
Background technology
With the fast development of electronic technology, microwave communication industry realizes the producer of microwave signal process using frequency converter
More and more, however, the design of existing microwave frequency conversion power-devided circuit, particularly the design of IF amplifier circuit is to electrical characteristics shadow
Sound is larger.Because its output signal line length differs, signals disperse point is more, causes work(separated time road that larger, power amplification is lost
Element matches disunity.
The content of the invention
The present invention provides a kind of microwave frequency conversion power-devided circuit, and it is larger to solve existing microwave frequency conversion power-devided circuit line loss,
Power amplification element matches skimble-scamble technical problem.
The present invention uses following technical scheme：
In a first aspect, the present invention provides a kind of microwave frequency conversion power-devided circuit, including the first IF amplifier circuit, the second intermediate frequency
Amplifying circuit and switching circuit,
The intermediate frequency that first IF amplifier circuit is used to obtain the first polar signal after the first mixting circuit is believed
Number it is amplified, second IF amplifier circuit is used for the intermediate frequency for obtaining the second polar signal after the second mixting circuit
Signal is amplified, and the switching circuit is connected with first IF amplifier circuit and the second IF amplifier circuit respectively, is used
In the frequency band signals that switching output needs, first IF amplifier circuit and the second IF amplifier circuit symmetric design.
Further, first IF amplifier circuit include first amplification branch road and second amplification branch road, described first
Amplification branch road is connected with the first output end of first mixting circuit, the second amplification branch road and first mixting circuit
The second output end connection, it is described first amplification branch road include power amplifying device, the output end of the power amplifying device is led to
Cross the first electric capacity to be connected with the first connection end of first resistor and second connection end respectively, the first connection end of the first resistor
It is connected respectively with the first connection end of second resistance and second connection end, the first connection end of the second resistance passes through the second electricity
Appearance is connected with the switching circuit, and the second connection end of the second resistance is connected by the 3rd electric capacity with the switching circuit,
The second connection end of the first resistor is connected with the first connection end of 3rd resistor and second connection end respectively, the 3rd electricity
First connection end of resistance is connected by the 4th electric capacity with the switching circuit, and the second connection end of the 3rd resistor passes through the 5th
Electric capacity is connected with the switching circuit, the circuit structure of the circuit structure of the second amplification branch road and the described first amplification branch road
It is identical.
Further, second IF amplifier circuit include the 3rd amplification branch road and the 4th amplification branch road, the described 3rd
The input of amplification branch road is connected with the first output end of second mixting circuit, the 4th amplification branch road and described second
The circuit structure of the second output end connection of mixting circuit, the 3rd amplification branch road and the 4th amplification branch road is with described first
The circuit structure for amplifying branch road is identical.
Further, the switching circuit includes four on-off circuits, four on-off circuit symmetric designs, and described
The four tunnels output of one amplification branch road is connected with four on-off circuits respectively, the four tunnels output difference of the second amplification branch road
It is connected with four on-off circuits, the four tunnels output of the 3rd amplification branch road is connected with four on-off circuits respectively,
The four tunnels output of the 4th amplification branch road is connected with four on-off circuits respectively, and each on-off circuit includes two
Signal output part.
Further, in addition to radio frequency amplifying circuit, the radio frequency amplifying circuit includes the first radio frequency amplifying circuit and the
Two radio frequency amplifying circuits, first radio frequency amplifying circuit are used to the first polar signal amplification of reception being delivered to described first
Mixting circuit, second radio frequency amplifying circuit are used to the second polar signal amplification of reception being delivered to the second mixing electricity
Road.
Further, in addition to the 3rd IF amplifier circuit, the input of the 3rd IF amplifier circuit are cut with described
The output end connection of circuit is changed, for amplifying the intermediate-freuqncy signal of the switching circuit output, the 3rd IF amplifier circuit pair
Claim design.
Technical scheme provided by the invention brings following beneficial effect：
First mixting circuit is filtered to the first polar signal, and is carried out difference frequency with local frequency and be mixed to obtain intermediate frequency letter
Number, the intermediate-freuqncy signal is amplified by the first IF amplifier circuit, the second mixting circuit is filtered to the second polar signal,
And carry out difference frequency with local frequency and be mixed to obtain intermediate-freuqncy signal, the intermediate-freuqncy signal is amplified by the second IF amplifier circuit,
Switched by switching circuit and select to need the frequency signal exported, realize that Ku wave bands Whole frequency band receives, the first IF amplifier circuit
With the second IF amplifier circuit symmetric design, reduce circuit work(and divide spaced point, avoid its output signal line length and differ, subtract
Small work(separated time road loss, realize that power amplification element matching is unified, and the simple clear thinking of the circuit layout, be easy to point
Analysis, reliability are high.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the present invention, in being described below to the present invention it is required use it is attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this area
, on the premise of not paying creative work, can also be according to present disclosure and these accompanying drawings for those of ordinary skill
Obtain other accompanying drawings.
Fig. 1 is the block diagram of microwave frequency conversion power-devided circuit provided by the invention.
Fig. 2 is the first IF amplifier circuit and the second IF amplifier circuit of microwave frequency conversion power-devided circuit provided by the invention
Circuit theory diagrams.
Fig. 3 is the circuit theory diagrams of the radio frequency amplifying circuit of microwave frequency conversion power-devided circuit provided by the invention.
Embodiment
For make present invention solves the technical problem that, the technical scheme that uses and the technique effect that reaches it is clearer, below
Technical scheme will be described in further detail with reference to accompanying drawing, it is clear that described embodiment is only this hair
Bright part of the embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those skilled in the art are not doing
Go out under the premise of creative work the every other embodiment obtained, belong to the scope of protection of the invention.
The system for being now based on satellite is increasingly used for transmitting TV programme.Generally, One Earth One Family synchronous satellite
Receive ground signal, and down link signal to be located at satellite coverage in ground-plane antenna.Ground-plane antenna generally includes one
Individual parabola antenna and for amplifying, filtering, it is the intermediate frequency low noise that can be coupled with receiver by the frequency conversion of reception signal
Module.
In order to increase the bandwidth from satellite-signal, signal is transmitted at the two poles of the earth.For example, can when the two poles of the earth are in 90 ° of out-phase
The bandwidth of satellite-signal is set to double.Ground-plane antenna must separate single polarized signal, and send them to corresponding connect
Receive unit.
Fig. 1 is the block diagram of microwave frequency conversion power-devided circuit provided by the invention.Fig. 2 is that microwave provided by the invention becomes
First IF amplifier circuit of frequency power-devided circuit and the circuit theory diagrams of the second IF amplifier circuit., should with reference to shown in Fig. 1, Fig. 2
Microwave frequency conversion power-devided circuit includes the first IF amplifier circuit 10, the second IF amplifier circuit 11 and switching circuit 20, and described
One IF amplifier circuit 10 is used to the intermediate-freuqncy signal that the first polar signal obtains after the first mixting circuit 30 being amplified,
Second IF amplifier circuit 11 is used to enter the intermediate-freuqncy signal that the second polar signal obtains after the second mixting circuit 31
Row amplification, the switching circuit 20 are connected with the IF amplifier circuit 11 of the first IF amplifier circuit 10 and second respectively, are used
In the frequency band signals that switching output needs, the IF amplifier circuit 11 of the first IF amplifier circuit 10 and second is symmetrically set
Meter.Wherein, in the present embodiment, the first polar signal is the signal of horizontal polarization, and the second polar signal is the signal of vertical polarization,
Certainly, in some other embodiment, the first polar signal can be the signal of vertical polarization, and the second polar signal can be horizontal pole
The signal of change.
First mixting circuit 30 of the microwave frequency conversion power-devided circuit is filtered to the first polar signal, and and local frequency
Carry out difference frequency to be mixed to obtain intermediate-freuqncy signal, the intermediate-freuqncy signal is amplified by the first IF amplifier circuit 10, the second mixing electricity
Road 31 is filtered to the second polar signal, and is carried out difference frequency with local frequency and be mixed to obtain intermediate-freuqncy signal, is put by the second intermediate frequency
Big circuit 11 is amplified to the intermediate-freuqncy signal, is switched by switching circuit 20 and is selected to need the frequency signal exported, realizes Ku
Wave band Whole frequency band receives, the first IF amplifier circuit 10 and the symmetric design of the second IF amplifier circuit 11, reduces circuit work(point
Spaced point, avoid its output signal line length and differ, reduce the loss of work(separated time road, realize power amplification element matching system
One, and the simple clear thinking of the circuit layout, it is easy to analyze, reliability is high.
Specifically, local frequency includes low-frequency band local frequency and high frequency band local frequency.Start-oscillation circuit FET
4009 go out low-frequency band local frequency 9.75GHZ with the common corequake of ceramic resonator, and start-oscillation circuit FET 5508 shakes with ceramics
Swing the common corequake of device and go out high frequency band local frequency 10.6GHZ.First mixting circuit 30 includes two image-reject filters, by
One polar signal obtains low band signal after being filtered：10.7GHZ-11.7GHZ；High-frequency band signals：11.7GHZ-
12.75GHZ.Equally, the second mixting circuit 31 includes two image-reject filters, after the second polar signal is filtered
To low band signal：10.7GHZ-11.7GHZ；High-frequency band signals：11.7GHZ-12.75GHZ.Filtered low band signal with
Low-frequency band local frequency carries out difference frequency and is mixed to obtain low-frequency band intermediate-freuqncy signal：10.7GHZ-9.75GHZ=0.95GHZ,
11.7GHZ-9.75GHZ=1.95GHZ；Filtered high-frequency band signals carry out difference frequency with high frequency band local frequency and are mixed to obtain height
Frequency band intermediate-freuqncy signal：11.7GHZ-10.6GHZ=1.1GHZ 12.75GHZ-10.6GHZ=2.15GHZ.Pass through switching circuit 20
Switching output, it is possible to achieve Ku wave bands Whole frequency band receive.
In the present embodiment, microwave frequency conversion power-devided circuit also includes the 3rd IF amplifier circuit 50, the 3rd intermediate frequency amplification
The input of circuit 50 is connected with the output end of the switching circuit 20, the intermediate frequency letter exported for amplifying the switching circuit 20
Number, the symmetric design of the 3rd IF amplifier circuit 50.Due to having signal power after the signal of the switching output of switching circuit 20
Loss influences circuit gain, is amplified by the 3rd IF amplifier circuit 50, intermediate-freuqncy signal is amplified into optimum state is transferred to and connect
Receipts machine.
Preferably, first IF amplifier circuit 10 includes the first amplification amplification branch road 101 of branch road 100 and second, institute
The first output end that the first amplification branch road 100 is stated with first mixting circuit 30 is connected, the second amplification branch road 101 and institute
The second output end connection of the first mixting circuit 30 is stated, the first amplification branch road 100 includes power amplifying device U6, the work(
Rate amplifier part U6 output end by the first electric capacity C36 respectively with first resistor R22 the first connection end and second connection end
Connection, the first connection end of the first resistor R22 connect with second resistance R24 the first connection end and second connection end respectively
Connect, the first connection end of the second resistance R24 is connected by the second electric capacity C38 with the switching circuit 20, second electricity
Resistance R24 second connection end is connected by the 3rd electric capacity C39 with the switching circuit 20, and the second of the first resistor R22 connects
Connect end to be connected with 3rd resistor R25 the first connection end and second connection end respectively, the first connection end of the 3rd resistor R25
It is connected by the 4th electric capacity C40 with the switching circuit 20, the second connection end of the 3rd resistor R25 passes through the 5th electric capacity
C41 is connected with the switching circuit 20, the circuit structure of the second amplification branch road 101 and the described first amplification branch road 100
Circuit structure is identical；Second amplification branch road 101 includes power amplifying device U7, and the output end of the power amplifying device U7 passes through
First electric capacity C47 is connected with first resistor R23 the first connection end and second connection end respectively, and the of the first resistor R23
One connection end is connected with second resistance R26 the first connection end and second connection end respectively, and the first of the second resistance R26 connects
Connect end to be connected with the switching circuit 20 by the second electric capacity C42, the second connection end of the second resistance R26 passes through the 3rd electricity
Hold C43 to be connected with the switching circuit 20, the second connection end of the first resistor R23 respectively with 3rd resistor R27 first
Connection end connects with second connection end, and the first connection end of the 3rd resistor R27 passes through the 4th electric capacity C44 and the switching electricity
Road 20 is connected, and the second connection end of the 3rd resistor R27 is connected by the 5th electric capacity C45 with the switching circuit 20.
Second IF amplifier circuit 11 includes the 3rd amplification branch road 110 and the 4th and amplifies branch road 111, and the described 3rd puts
The input of big branch road 110 is connected with the first output end of second mixting circuit 31, the 4th amplification branch road 111 and institute
The second output end connection of the second mixting circuit 31 is stated, the 3rd amplification branch road 110 and the 4th amplifies the circuit knot of branch road 111
Structure is identical with the circuit structure of the described first amplification branch road 100.The 3rd amplification branch road 110 includes power amplifying device U6,
The output end of the power amplifying device U6 by the first electric capacity C36 respectively with first resistor R22 the first connection end and second
Connection end is connected, and the first connection end of the first resistor R22 is connected with second resistance R24 the first connection end and second respectively
End connection, the first connection end of the second resistance R24 is connected by the second electric capacity C38 with the switching circuit 20, and described the
Two resistance R24 second connection end is connected by the 3rd electric capacity C39 with the switching circuit 20, and the of the first resistor R22
Two connection ends are connected with 3rd resistor R25 the first connection end and second connection end respectively, and the first of the 3rd resistor R25 connects
Connect end to be connected with the switching circuit 20 by the 4th electric capacity C40, the second connection end of the 3rd resistor R25 passes through the 5th electricity
Hold C41 to be connected with the switching circuit 20；4th amplification branch road 111 includes power amplifying device U7, the power amplifying device
U7 output end is connected with first resistor R23 the first connection end and second connection end respectively by the first electric capacity C47, and described
One resistance R23 the first connection end is connected with second resistance R26 the first connection end and second connection end respectively, second electricity
Resistance R26 the first connection end is connected by the second electric capacity C42 with the switching circuit 20, and the second of the second resistance R26 connects
Connect end to be connected with the switching circuit 20 by the 3rd electric capacity C43, the second connection end of the first resistor R23 is respectively with the 3rd
Resistance R27 the first connection end connects with second connection end, and the first connection end of the 3rd resistor R27 passes through the 4th electric capacity
C44 is connected with the switching circuit 20, and the second connection end of the 3rd resistor R27 passes through the 5th electric capacity C45 and the switching
Circuit 20 connects.
First amplification branch road 100, second amplifies branch road the 101, the 3rd and amplifies the amplification circuit of branch road 111 of branch road 110 and the 4th
Structure is identical, symmetric design, reduces circuit work(and divides spaced point, avoids its output signal line length and differs, and reduces work(point
Line loss, realize that power amplification element matching is unified.
Preferably, the switching circuit 20 includes four on-off circuits 200, and on-off circuit 200 selects A7533 chips.Four
The individual symmetric design of the on-off circuit 200, it is described first amplification branch road 100 four tunnels output respectively with four on-off circuits
200 connections, the four tunnels output of the second amplification branch road 101 are connected with four on-off circuits 200 respectively, and the described 3rd puts
The four tunnels output of big branch road 110 is connected with four on-off circuits 200 respectively, and four tunnels of the 4th amplification branch road 111 are defeated
Go out and be connected respectively with four on-off circuits 200, each on-off circuit 200 includes two signal output parts.First puts
Big branch road 100 and second amplifies branch road 101 and the 3rd and amplifies the amplification branch road 111 of branch road 110 and the 4th and four on-off circuits 200
Line almost symmetry, same length, avoid its output signal line length and differ, reduce the loss of work(separated time road.
Fig. 3 is the circuit theory diagrams of the radio frequency amplifying circuit of microwave frequency conversion power-devided circuit provided by the invention.With reference to the institute of figure 3
Show, it is preferable that microwave frequency conversion power-devided circuit also includes radio frequency amplifying circuit 40, and the radio frequency amplifying circuit 40 includes the first radio frequency
The radio frequency amplifying circuit 401 of amplifying circuit 400 and second, first radio frequency amplifying circuit 400 are used for the first polarity of reception
Signal amplification is delivered to first mixting circuit 30, and second radio frequency amplifying circuit 401 is used for the second polarity of reception
Signal amplification is delivered to second mixting circuit 31.Specifically, the first radio frequency amplifying circuit 400 and the second radio frequency amplifying circuit
401 circuit structures are identical, select NE3512 FETs, second level amplifier including third stage amplifier, first order amplifier
And the 3rd pole amplifier select NE3503 FETs, be first order amplifier, second level amplifier and the 3rd pole amplifier
Suitable grid bias is provided, ensures the stabilization of operating point of first order amplifier, second level amplifier and the 3rd pole amplifier, makes
First order amplifier, second level amplifier and the 3rd pole amplifier noise it is low, working condition is preferable.
Above content is only presently preferred embodiments of the present invention, for one of ordinary skill in the art, according to the present invention's
Thought, there will be changes, this specification content should not be construed as to the present invention in specific embodiments and applications
Limitation.
Claims (6)
- A kind of 1. microwave frequency conversion power-devided circuit, it is characterised in that including the first IF amplifier circuit, the second IF amplifier circuit and Switching circuit,First IF amplifier circuit is used to enter the intermediate-freuqncy signal that the first polar signal obtains after the first mixting circuit Row amplification, second IF amplifier circuit are used for the intermediate-freuqncy signal for obtaining the second polar signal after the second mixting circuit It is amplified, the switching circuit is connected with first IF amplifier circuit and the second IF amplifier circuit respectively, for cutting Change the frequency band signals that output needs, first IF amplifier circuit and the second IF amplifier circuit symmetric design.
- 2. microwave frequency conversion power-devided circuit according to claim 1, it is characterised in that first IF amplifier circuit includes First amplification branch road and the second amplification branch road, the first output end of the first amplification branch road and first mixting circuit connect Connect, the second amplification branch road is connected with the second output end of first mixting circuit, and the first amplification branch road includes work( Rate amplifier part, the output end of the power amplifying device by the first electric capacity respectively with the first connection end of first resistor and Two connection ends connect, and the first connection end of the first resistor connects with the first connection end of second resistance and second connection end respectively Connecing, the first connection end of the second resistance is connected by the second electric capacity with the switching circuit, and the second of the second resistance Connection end is connected by the 3rd electric capacity with the switching circuit, the second connection end of the first resistor respectively with 3rd resistor First connection end connects with second connection end, and the first connection end of the 3rd resistor passes through the 4th electric capacity and the switching circuit Connection, the second connection end of the 3rd resistor are connected by the 5th electric capacity with the switching circuit, the second amplification branch road Circuit structure with described first amplification branch road circuit structure it is identical.
- 3. microwave frequency conversion power-devided circuit according to claim 2, it is characterised in that second IF amplifier circuit includes 3rd amplification branch road and the 4th amplification branch road, the input of the 3rd amplification branch road and second mixting circuit it is first defeated Go out end connection, the 4th amplification branch road is connected with the second output end of second mixting circuit, the 3rd amplification branch road It is identical with the circuit structure of the described first amplification branch road with the circuit structure of the 4th amplification branch road.
- 4. microwave frequency conversion power-devided circuit according to claim 3, it is characterised in that the switching circuit includes four switches Circuit, four on-off circuit symmetric designs, the four tunnels output of the first amplification branch road are electric with four switches respectively Road is connected, and the four tunnels output of the second amplification branch road is connected with four on-off circuits respectively, the 3rd amplification branch road Four tunnels output be connected respectively with four on-off circuits, it is described 4th amplification branch road four tunnels export respectively with described in four On-off circuit connects, and each on-off circuit includes two signal output parts.
- 5. microwave frequency conversion power-devided circuit according to claim 1, it is characterised in that described also including radio frequency amplifying circuit Radio frequency amplifying circuit includes the first radio frequency amplifying circuit and the second radio frequency amplifying circuit, and first radio frequency amplifying circuit is used for will The the first polar signal amplification received is delivered to first mixting circuit, and second radio frequency amplifying circuit is used for reception The amplification of second polar signal is delivered to second mixting circuit.
- 6. microwave frequency conversion power-devided circuit according to claim 1, it is characterised in that also including the 3rd IF amplifier circuit, The input of 3rd IF amplifier circuit is connected with the output end of the switching circuit, defeated for amplifying the switching circuit The intermediate-freuqncy signal gone out, the 3rd IF 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105119573A CN105119573A (en) | 2015-12-02 |
| CN105119573B true 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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Families Citing this family (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 |
| CN107294547B (en) * | 2017-08-07 | 2019-09-06 | 华讯方舟科技有限公司 | A kind of microwave frequency changer circuit and microwave converter |
Family Cites Families (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 |
| US6091966A (en) * | 1997-09-29 | 2000-07-18 | Ericsson, Inc. | 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 |
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2015
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