CN209435197U - A kind of duplexer circuit of circular polarisation KU wave band tuner - Google Patents
A kind of duplexer circuit of circular polarisation KU wave band tuner Download PDFInfo
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- CN209435197U CN209435197U CN201920237085.3U CN201920237085U CN209435197U CN 209435197 U CN209435197 U CN 209435197U CN 201920237085 U CN201920237085 U CN 201920237085U CN 209435197 U CN209435197 U CN 209435197U
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Abstract
The utility model relates to a kind of duplexer circuits of circular polarisation KU wave band tuner, include RF amplifying circuit, bandwidth-limited circuit, local oscillator, frequency mixer, LC duplexer, polarized signal switching circuit, intermediate-freuqncy signal amplification output circuit；Right hand signal and left-handed signal pass through dextrorotation and the amplification of left-handed RF amplifying circuit respectively, bandwidth-limited circuit filtering is inputted again, it is mixed in frequency mixer after bandwidth-limited circuit filtering with the local oscillator of local oscillator, right hand signal and left-handed signal input two input terminals of LC duplexer after being mixed respectively, finally export from an output end.The utility model is without LTCC filter, and it is convenient that circuit more simplifies, and material cost and cost of labor are all greatly lowered.
Description
[technical field]
The utility model relates to satellite TV reception technologies, and in particular to a kind of duplexer of circular polarisation KU wave band tuner
Circuit.
[background technique]
It include feed, waveguide pipe, circuit device and connector in existing KU wave band circular polarisation tuner.Wherein in circuit device
In include RF amplifying circuit, bandwidth-limited circuit, local oscillator, frequency mixer, LTCC filter, polarized signal switching circuit,
Voltage control circuit and intermediate-freuqncy signal amplification output circuit.
LTCC filter is made of a kind of LTCC Technology, and higher cost, volume are larger, in the high frequency of the type
In head circuit, need to assemble two LTCC filters.LTCC filter how is replaced using more optimal circuit, is improved and is produced
Product the problem of competitiveness is perplexed in current industry in the market.Given this present inventor proposes a kind of circular polarisation KU wave band
Thus the duplexer circuit of tuner, this case generate.
[utility model content]
To solve the above problems, the purpose of this utility model is to provide a kind of duplexers of circular polarisation KU wave band tuner
Circuit, without LTCC filter, it is convenient that circuit more simplifies, and material cost and cost of labor are all greatly lowered.
To achieve the above object, the utility model mainly adopts the following technical scheme that
A kind of duplexer circuit of circular polarisation KU wave band tuner, includes RF amplifying circuit, bandwidth-limited circuit, the machine
Oscillator, frequency mixer, LC duplexer, polarized signal switching circuit, intermediate-freuqncy signal amplification output circuit；Right hand signal and left-handed letter
Amplified number respectively by dextrorotation and left-handed RF amplifying circuit, then input bandwidth-limited circuit filtering, after bandwidth-limited circuit filtering
It is mixed in frequency mixer with the local oscillator of local oscillator, right hand signal and left-handed signal input LC duplexer two after being mixed respectively
Input terminal is finally exported from an output end.
After the LC duplexer output, signal is again successively by polarized signal switching circuit and intermediate-freuqncy signal amplification output electricity
Road exports for users to use.
The LC duplexer includes port one, port two, port three, high-pass filter, low-pass filter and T junction,
Port one connects high-pass filter and is input to T junction, and port two inputs T junction after connecting low-pass filter, leads to after T junction output
Cross the output of port three.
The left-handed signal is sent into port one through processing, and right hand signal is sent into port two through processing.
The high-pass filter includes several earths on several concatenated coupled capacitors and main road on main road
LC filter circuit.
The low-pass filter includes several concatenated coupled capacitors on main road, and in capacitor several electricity in parallel
Sense, while several filter capacitor ground connection in parallel on main road.
In the LC duplexer, using the LNB33 plate with a thickness of 0.6~1.5mm, the inductance element on circuit is adopted
It is realized with the microstrip transmission line for carving 50 ohmages that copper foil line manufactures is covered on plate.
The copper foil line thickness 30-46um.
Local oscillator, dextrorotation RF amplifying circuit and the left-handed RF amplifying circuit is powered using voltage control circuit.
Compared with prior art, the utility model has the following beneficial effects:
The utility model proposes new design circuit, solve the problems, such as that two paths of signals shares the characteristics of components of same port,
It is formed using high-pass filter, low-pass filter and T junction, T junction route designs so that two signal paths are separated from each other, solution
Signal interference caused by two-way route of having determined couples, meanwhile, LC duplexer utilizes the frequency dividing of high-pass filter and low-pass filter
Function and signal is separated according to frequency, to achieve the purpose that reinforce isolation, allows same transmission lines to two
Signal path is used in conjunction with, to realize that same transmission lines send and receive two different frequency signals.
[Detailed description of the invention]
Fig. 1 is the circuit module schematic diagram of the utility model preferred embodiment；
Fig. 2 is the module diagram of LC duplexer in the utility model preferred embodiment；
Fig. 3 is the circuit diagram of LC duplexer in the utility model preferred embodiment；
Fig. 4 is the line map of LC duplexer in the utility model preferred embodiment.
[specific embodiment]
It please refers to shown in Figure of description 1-4, the utility model preferred embodiment is described further.
It is to be improved on the high frequency tuner circuit by circular polarisation in the present embodiment, the module being mainly concerned with includes RF amplification
Circuit (left-handed 11 and dextrorotation 12), bandwidth-limited circuit (21 and 22), local oscillator (31 and 32), frequency mixer (41 and 42),
LC duplexer 5, polarized signal switching circuit 6, intermediate-freuqncy signal amplification output circuit 7.
Radiofrequency signal is divided into left-handed signal and right hand signal, and two paths of signals is input to LC duplexer 5 after independently handling
Signal exports all the way for middle synthesis.Wherein left-handed signal is amplified by left-handed RF amplifying circuit 11, is input to bandwidth-limited circuit 21
Filtering, then be input to the local oscillation signal of local oscillator 31 and be mixed the port 2 52 for being delivered to LC duplexer 5 in frequency mixer 41,
It is exported, is sent in polarized signal switching circuit 6, right hand signal is amplified by dextrorotation RF by the port 3 53 of LC duplexer 5
Circuit 12 amplifies, and input bandwidth-limited circuit 22 filters, then is input in frequency mixer 42 with the local oscillation signal of local oscillator 32
Mixing is delivered to the port 1 of LC duplexer 5, is exported by the port 3 53 of LC duplexer 5, is sent to polarized signal switching
In circuit 6, to ensure that two output ports can obtain two kinds of polarized signals, and cutting for two kinds of polarized signals may be implemented
It changes.Finally intermediate-freuqncy signal amplification is being exported for users to use by intermediate-freuqncy signal amplification output circuit 7.Wherein, in entire circuit
Middle local oscillator 31 and 32, left-handed RF amplifying circuit 11 and dextrorotation RF amplifying circuit 12 are powered using voltage control circuit 8.
LC duplexer 5 includes two inlet ports 1, port 2 52 and one outlet port three in the present embodiment
53 and high-pass filter 54, low-pass filter 55 and T junction 56.Dextrorotation intermediate-freuqncy signal is inputted from port 1, through excessively high
Bandpass filter 54 filters, and left-handed intermediate-freuqncy signal is inputted from port 2 52, filters by low-pass filter 55, then passes through T junction 56
Two paths of signals is exported from port 3 53 after merging.
High-pass filter 54 in the present embodiment includes using multiple capacitors series connection (C 1, C2, C3) coupling on main road
Signal, three LC filter circuits (L1C8, L2C14, L3C9) ground connection in parallel on main road.In low-pass filter 55, on main road
It connects (C4, C5, C6) coupled signal including multiple capacitors, and shunt inductance (L4, L5, L6) in each coupled capacitor, then
Multiple capacity earth (C11, C12, C13) filtering in parallel on main road.Two paths of signals is finally coupled by coupled capacitor C10 again,
It is exported from port 3 53.
LC duplexer in the present embodiment is that (copper-clad plate is wherein using the LNB33 plate with a thickness of 0.6~1.5mm
A kind of plate), in the present embodiment, the inductance L being related to replaces inductance element to realize using microstrip transmission line.Tool
Body is that quarter microstrip transmission line is covered on LNB33 plate, and microstrip transmission line is made of the copper foil line using thickness 30-46um, is had
50 ohmages, referring to 3 and Fig. 4.
Using the LC duplexer circuit 5 in the present embodiment, T junction route designs so that two signal paths are separated from each other,
Solve signal interference caused by the coupling of two-way route, meanwhile, LC duplexer utilizes point of high-pass filter and low-pass filter
Frequency function and signal is separated according to frequency, to achieve the purpose that reinforce isolation, allows same transmission lines right
Two signal paths are used in conjunction with, to realize that same transmission lines send and receive two different frequency signals.It can
To substitute traditional LTCC filter completely, and structure is simple, and convenient for production, cost is greatly reduced.
Above specific embodiment is only the preferred embodiment of this creation, all in this wound not to limit this creation
Any modification, equivalent substitution, improvement and etc. done within the spirit and principle of work, should be included in this creation protection scope it
It is interior.
Claims (9)
1. a kind of duplexer circuit of circular polarisation KU wave band tuner, it is characterised in that: include RF amplifying circuit, bandpass filtering
Circuit, local oscillator, frequency mixer, LC duplexer, polarized signal switching circuit, intermediate-freuqncy signal amplification output circuit；Dextrorotation letter
Number and left-handed signal pass through respectively dextrorotation and left-handed RF amplifying circuit amplification, then input bandwidth-limited circuit filtering, bandpass filtering
It is mixed in frequency mixer after circuit filtering with the local oscillator of local oscillator, right hand signal and left-handed signal input LC after being mixed respectively
Two input terminals of duplexer are finally exported from an output end.
2. a kind of duplexer circuit of circular polarisation KU wave band tuner as described in claim 1, it is characterised in that: the LC is bis-
After the output of work device, signal successively makes by polarized signal switching circuit and the output of intermediate-freuqncy signal amplification output circuit for user again
With.
3. a kind of duplexer circuit of circular polarisation KU wave band tuner as described in claim 1, it is characterised in that: the LC
Duplexer includes port one, port two, port three, high-pass filter, low-pass filter and T junction, and port one connects high pass filter
Wave device is input to T junction, and port two inputs T junction after connecting low-pass filter, exported after T junction output by port three.
4. a kind of duplexer circuit of circular polarisation KU wave band tuner as claimed in claim 3, it is characterised in that: the left side
It revolves signal and is sent into port one through processing, right hand signal is sent into port two through processing.
5. a kind of duplexer circuit of circular polarisation KU wave band tuner as claimed in claim 3, it is characterised in that: the height
Bandpass filter includes the LC filter circuit of several earths on several concatenated coupled capacitors and main road on main road.
6. a kind of duplexer circuit of circular polarisation KU wave band tuner as claimed in claim 3, it is characterised in that: described is low
Bandpass filter includes several concatenated coupled capacitors on main road, and in parallel in several in parallel inductance of capacitor, while on main road
Several filter capacitor ground connection.
7. a kind of duplexer circuit of circular polarisation KU wave band tuner as claimed in claim 3, it is characterised in that: the LC
In duplexer, using the LNB33 plate with a thickness of 0.6~1.5mm, the inductance element on circuit is used covers quarter copper on plate
The microstrip transmission line of 50 ohmages of tinsel cord manufacture is realized.
8. a kind of duplexer circuit of circular polarisation KU wave band tuner as claimed in claim 7, it is characterised in that: the copper
Tinsel cord thickness 30-46um.
9. a kind of duplexer circuit of circular polarisation KU wave band tuner as described in claim 1, it is characterised in that: the sheet
Machine oscillator, dextrorotation RF amplifying circuit and left-handed RF amplifying circuit are powered using voltage control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920237085.3U CN209435197U (en) | 2019-02-25 | 2019-02-25 | A kind of duplexer circuit of circular polarisation KU wave band tuner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920237085.3U CN209435197U (en) | 2019-02-25 | 2019-02-25 | A kind of duplexer circuit of circular polarisation KU wave band tuner |
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| CN209435197U true CN209435197U (en) | 2019-09-24 |
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| CN201920237085.3U Active CN209435197U (en) | 2019-02-25 | 2019-02-25 | A kind of duplexer circuit of circular polarisation KU wave band tuner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113346862A (en) * | 2021-04-07 | 2021-09-03 | 湖南迈克森伟电子科技有限公司 | Switching circuit for small-size and low-loss multi-signal frequency band work |
-
2019
- 2019-02-25 CN CN201920237085.3U patent/CN209435197U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113346862A (en) * | 2021-04-07 | 2021-09-03 | 湖南迈克森伟电子科技有限公司 | Switching circuit for small-size and low-loss multi-signal frequency band work |
| CN113346862B (en) * | 2021-04-07 | 2023-04-14 | 湖南迈克森伟电子科技有限公司 | Switching circuit for small-size and low-loss multi-signal frequency band work |
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