CN208971496U - A kind of low noise frequency reducer - Google Patents
A kind of low noise frequency reducer Download PDFInfo
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- CN208971496U CN208971496U CN201821680523.5U CN201821680523U CN208971496U CN 208971496 U CN208971496 U CN 208971496U CN 201821680523 U CN201821680523 U CN 201821680523U CN 208971496 U CN208971496 U CN 208971496U
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Abstract
The utility model relates to a kind of low noise frequency reducers, including the horizontal polarization signals and vertical polarization signal two paths of signals input terminal, radio frequency amplifying circuit and CMOS satellite resonator being sequentially connected electrically, CMOS satellite resonator is also connected with several vHF filters, it further include vHF signal input part, the distributor circuit that is connect with vHF signal input part, distributor circuit is also connected with several uHF filters, uHF filter is identical with the quantity of vHF filter, and the output end of the output end of every vHF filter and a uHF filter is correspondingly connected with as a signal output end.The utility model can receive vHF+uHF signal, additionally it is possible to receive Ku signal, stable output signal, low noise, and the utility model circuit is simple, easy to produce, cost advantage is clearly.
Description
Technical field
The utility model relates to the technical field of satellite communication, especially a kind of low noise frequency reducer.
Background technique
Early stage, set-top box can only solely be decoded uHF signal or vHF signal, closely since number of satellite is fewer
Over 10 years, with the substantial increase of satellite television subscribers quantity, it is proposed in the market and uHF signal and vHF signal is carried out together
Decoded set-top box, to produce vHF+uHF frequency demultiplier.However, the frequency demultiplier circuit on existing market is extremely complex, part
At high cost, noise is big, and frequency demultiplier volume is big, and production and maintenance difficulty are very big, and production efficiency is low, high production cost.
Utility model content
The purpose of the utility model is to provide a kind of low noise frequency reducers, solve existing vHF+uHF frequency demultiplier circuit very
Complexity is unfavorable for the technical problem of production and stability difference.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of low noise frequency reducer, it is defeated including the horizontal polarization signals being sequentially connected electrically and vertical polarization signal two paths of signals
Entering end, radio frequency amplifying circuit and CMOS satellite resonator, the CMOS satellite resonator is also connected with several vHF filters,
It further include vHF signal input part, the distributor circuit that is connect with the vHF signal input part, if the distributor circuit is also connected with
Dry uHF filter, the uHF filter is identical with the quantity of vHF filter, the output end and a uHF of every vHF filter
The output end of filter is correspondingly connected with as a signal output end.
Further, there are four the uHF filters, there are four the vHF filters, and there are four the signal output ends.
Further, the distributor circuit includes the first distributor, the second distributor and third distributor, first distribution
The input terminal of device is connect with vHF signal input part, the output end of first distributor input terminal with the second distributor respectively
It is connected with the input terminal of third distributor, the output end of second distributor and the input terminal point of two of them uHF filter
It does not connect, the input terminal of the output end and another two uHF filter of the third distributor is separately connected.
It further, further include reference frequency crystal oscillator, the reference frequency crystal oscillator is connect with CMOS satellite resonator.
Further, the radio frequency amplifying circuit includes first order radio frequency amplifying circuit and second level radio frequency amplifying circuit.
Further, the first order radio frequency amplifying circuit includes first order horizontal amplifier and first order vertical amplifier.
Further, the second level radio frequency amplifying circuit includes second level horizontal amplifier and second level vertical amplifier.
The beneficial effects of the utility model are: the utility model can receive vHF+uHF signal, additionally it is possible to receive Ku letter
Number, if vertical polarization signal and horizontal polarization signals are divided into main line output signal by CMOS satellite resonator, and pass through vHF
Filter, which is filtered, leaves uHF signal and Ku signal；If vHF signal is divided by distributor circuit by main line output signal, and
It is filtered by uHF filter and leaves vHF signal；Two signal output ends are combined into a signal output end, output letter again
Number stabilization, low noise, and the utility model circuit is simple, easy to produce, cost advantage is clearly.
Detailed description of the invention
Specific embodiment of the present utility model is further described with reference to the accompanying drawing:
Fig. 1 is the two paths of signals input circuit figure of the utility model preferred embodiment；
Fig. 2 is vHF signal input circuit figure.
Specific embodiment
In order to make those skilled in the art better understand the scheme of the utility model, practical to this below in conjunction with attached drawing
Technical solution in new embodiment is clearly and completely described, it is clear that described embodiment is only the utility model
The embodiment of a part, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The model of the utility model protection all should belong in the every other embodiment obtained without creative efforts
It encloses.
Referring to Fig.1,2, a kind of low noise frequency reducer of the present embodiment, including the horizontal polarization signals H that is sequentially connected electrically and
Vertical polarization signal V two paths of signals input terminal, radio frequency amplifying circuit 1 and CMOS satellite resonator 2, the CMOS satellite resonator
2 are also connected with several vHF filters 4, and there are four the vHF filters 4, and the radio frequency amplifying circuit 1 is used to believe two-way
It number amplifies, the CMOS satellite resonator 2 is used to two paths of signals being divided into four tunnel output signals, four tunnel output signal
Including two-way horizontal polarization signals and two-way vertical polarization signal, the vHF filter 4 leaves uHF for filtering vHF signal
Signal and Ku signal；
It further include vHF signal input part, the distributor circuit 5 that is connect with the vHF signal input part, the distributor circuit 5
Several uHF filters 6 are also connected with, the quantity of the uHF filter 6 and vHF filter 4 is identical, every vHF filter 4
Output end and the output end of a uHF filter 6 be correspondingly connected with as a signal output end, there are four the vHF filters 4,
The distributor circuit 5 include the first distributor 51, the second distributor 52 and third distributor 53, first distributor 51 it is defeated
Enter end to connect with vHF signal input part, the output end of first distributor 51 respectively with the input terminal of the second distributor 52 and
The input terminal of third distributor 53 connects, the output end of second distributor 52 and the input terminal of two of them uHF filter 6
It is separately connected, the input terminal of the output end and another two uHF filter 6 of the third distributor 53 is separately connected, the distribution
VHF signal is divided into four tunnel output signals by circuit 5, and the uHF filter 6 leaves vHF signal for filtering uHF signal；
The output end of the output end of vHF filter 4 and uHF filter 6 is combined into a signal output end, the signal again
There are four output ends, and four signal output ports are not interfere with each other mutually, can give four users while use, meet the need of user
It asks, the vHF signal and uHF signal finally obtained makes each signal gain flat stable without extra signal interference.
The quantity of the vHF filter 4, uHF filter 6 and signal output port can be adjusted according to the actual situation,
To meet the needs of more clients.
The low noise frequency reducer further includes reference frequency crystal oscillator 3, the reference frequency crystal oscillator 3 and CMOS satellite resonator
2 connections, the reference frequency crystal oscillator 3 make frequency stabilization.The CMOS satellite resonator 2 uses the model of NXP company
The CMOS satellite resonator of TFF1044, the reference frequency crystal oscillator 3 use frequency for the patch crystal oscillator of 25MHz.
The radio frequency amplifying circuit 1 includes first order radio frequency amplifying circuit 11 and second level radio frequency amplifying circuit 12, described
First order radio frequency amplifying circuit 11 includes first order horizontal amplifier and first order vertical amplifier, the second level radio frequency amplification
Circuit 12 includes second level horizontal amplifier and second level vertical amplifier.The CMOS satellite resonator 2 is radio frequency amplification electricity
First order horizontal amplifier, first order vertical amplifier, second level horizontal amplifier and the second level vertical amplifier on road 1 provide
Bias voltage.The first order horizontal amplifier and second level horizontal amplifier are all made of the amplifier of model NE3512, institute
It states first order vertical amplifier and second level vertical amplifier is all made of the amplifier of model NE3503.
In conclusion above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, those skilled in the art should understand that；It is still
It can modify the technical solutions described in the foregoing embodiments, or equally be replaced to being wherein no lack of technical characteristic
It changes, and these are modified or replaceed, the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (7)
1. a kind of low noise frequency reducer, it is characterised in that: including the horizontal polarization signals and vertical polarization signal being sequentially connected electrically
Two paths of signals input terminal, radio frequency amplifying circuit (1) and CMOS satellite resonator (2), the CMOS satellite resonator (2) are also connected with
There are several vHF filters (4), further includes vHF signal input part, the distributor circuit that is connect with the vHF signal input part
(5), the distributor circuit (5) is also connected with several uHF filters (6), the uHF filter (6) and vHF filter (4)
Quantity it is identical, the output end of the output end of every vHF filter (4) and a uHF filter (6) is correspondingly connected with as a signal
Output end.
2. low noise frequency reducer according to claim 1, it is characterised in that: there are four the uHF filters (6), described
There are four vHF filters (4), and there are four the signal output ends.
3. low noise frequency reducer according to claim 2, it is characterised in that: the distributor circuit (5) includes the first distribution
Device (51), the second distributor (52) and third distributor (53), the input terminal and vHF signal of first distributor (51) input
End connection, the output end of first distributor (51) respectively with the input terminal of the second distributor (52) and third distributor (53)
Input terminal connection, the input terminal of the output end and two of them uHF filter (6) of second distributor (52) connects respectively
It connects, the input terminal of the output end and another two uHF filter (6) of the third distributor (53) is separately connected.
4. low noise frequency reducer according to claim 1, it is characterised in that: further include reference frequency crystal oscillator (3), the ginseng
Frequency crystal oscillator (3) is examined to connect with CMOS satellite resonator (2).
5. low noise frequency reducer according to claim 1, it is characterised in that: the radio frequency amplifying circuit (1) includes first
Grade radio frequency amplifying circuit (11) and second level radio frequency amplifying circuit (12).
6. low noise frequency reducer according to claim 5, it is characterised in that: first order radio frequency amplifying circuit (11) packet
Include first order horizontal amplifier and first order vertical amplifier.
7. low noise frequency reducer according to claim 5, it is characterised in that: second level radio frequency amplifying circuit (12) packet
Include second level horizontal amplifier and second level vertical amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821680523.5U CN208971496U (en) | 2018-10-17 | 2018-10-17 | A kind of low noise frequency reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821680523.5U CN208971496U (en) | 2018-10-17 | 2018-10-17 | A kind of low noise frequency reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208971496U true CN208971496U (en) | 2019-06-11 |
Family
ID=66760040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821680523.5U Active CN208971496U (en) | 2018-10-17 | 2018-10-17 | A kind of low noise frequency reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208971496U (en) |
-
2018
- 2018-10-17 CN CN201821680523.5U patent/CN208971496U/en active Active
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