CN107864348A - A kind of C-band dual output medium this vibration shape dual polarization positive bias lnb - Google Patents
A kind of C-band dual output medium this vibration shape dual polarization positive bias lnb Download PDFInfo
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- CN107864348A CN107864348A CN201711139367.1A CN201711139367A CN107864348A CN 107864348 A CN107864348 A CN 107864348A CN 201711139367 A CN201711139367 A CN 201711139367A CN 107864348 A CN107864348 A CN 107864348A
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- 230000010287 polarization Effects 0.000 title claims abstract description 34
- 230000009977 dual effect Effects 0.000 title claims abstract description 26
- 230000010355 oscillation Effects 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000003534 oscillatory effect Effects 0.000 abstract 1
- 230000003321 amplification Effects 0.000 description 8
- 238000003199 nucleic acid amplification method Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 238000010276 construction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The invention discloses a kind of C-band dual output medium this vibration shape dual polarization positive bias lnb, including horizontal polarization amplifying circuit, vertical polarization amplifying circuit, filter circuit, mixting circuit, integrated switch, IF amplifier circuit, signal output apparatus.Low-noise amplifier in horizontal polarization amplifying circuit and vertical polarization amplifying circuit employs N-channel enhancement mode FET, eliminate oscillatory type negative voltage generating circuit, simplify circuit, reduce product cost and spillage of material, and the frequency demultiplier realizes two users and shares a tuner LNBF and antenna, it is easy to set up, and saves cost and environment space.
Description
Technical field
The present invention relates to frequency demultiplier field, particularly a kind of this vibration shape of C-band dual output medium dual polarization positive bias low noise
Sound frequency demultiplier.
Background technology
With science and technology and the development of life, the transmission of communication is also increasingly popularized, and satellite television ratio is watched in family
More and more higher.Wherein, frequency demultiplier is to watch device essential to satellite television, but the production of C-band frequency demultiplier on the market at present
In terms of the antinoise antijamming capability and output function of product, can not increasingly meet the needs of client.An and height
Frequency head LNBF is only capable of watching full frequency band TV programme for sole user end, also brings certain limitation；Industrial technology is constantly being entered
Step, in recent years in the case of market competition more and more fierceness, manufacturing cost and design cost more and more face for enterprise
Test.
It is limited to the design of conventional satellite frequency demultiplier circuit and using theory.It can only match somebody with somebody one for a tuner LNBF
Reception antenna, the limitation used for a user terminal；Also there are some on the market by a plurality of cable and power divider to carry out
The product of expansion, but erection complexity/it is limited to installation environment space, cost height.
For present low-noise amplifier typically using shape FET is exhausted, its grid needs negative voltage bias could work
Make, so needing to design multigroup negative voltage generating circuit in circuit, so as to increase cost, increase circuit layout area.
The content of the invention
To solve the above problems, it is an object of the invention to provide a kind of C-band dual output this vibration shape of medium dual polarization just
Lnb is biased, the signal that horizontally-polarized antenna and vertical polarized antenna are received is respectively by amplification, filtering, local oscillator
Believe while obtaining two groups of independence by the effect of integrated switch again after mixing comprising the full frequency band of vertical polarization and horizontal polarization
Number, exported after amplifying via intermediate frequency；The frequency demultiplier is simple in construction, it is easy to set up, and the low-noise amplifier of the frequency demultiplier is adopted
With N-channel enhancement mode FET, it is only necessary to can be worked in grid plus positive voltage, electricity is produced without separately designing a kind of negative voltage
Road, product cost and material deterioration inside are greatly reduced, reduce circuit row's plate suqare.
Technical scheme is used by the present invention solves its problem：
A kind of C-band dual output medium this vibration shape dual polarization positive bias lnb, including waveguide and waveguide
The tuner of connection, the circuit module being arranged in the casing and casing on tuner；The casing is anti-interference casing, its
On be provided with two export heads；The horizontally-polarized antenna for receiving horizontal polarization signals is provided with the waveguide and is used for
Receive the vertical polarized antenna of vertical polarization signal；
The circuit module includes low-noise amplifier, wave filter, frequency mixer, integrated switch and intermediate frequency amplifier；It is described
Low-noise amplifier has four, respectively the first low-noise amplifier, the second low-noise amplifier, the 3rd low-noise amplifier and
4th low-noise amplifier, first low-noise amplifier, the second low-noise amplifier, the 3rd low-noise amplifier and the 4th
Low-noise amplifier uses N-channel enhancement mode FET, it is only necessary to can be worked in grid plus positive voltage, without carrying in addition
For negative bias voltage；The wave filter has two, and respectively the first wave filter and the second wave filter, the frequency mixer have two,
Respectively the first frequency mixer and the second frequency mixer, the intermediate frequency amplifier have two, respectively the first intermediate frequency amplifier and second
Intermediate frequency amplifier；The circuit module also includes local oscillator, and the local oscillator is media resonant oscillator, and it includes
The local oscillation signal output end of the identical frequency of two outputs；
The horizontally-polarized antenna, the first low-noise amplifier, the second low-noise amplifier, the first wave filter, first mix
Frequency device, integrated switch, the first intermediate frequency amplifier and an export head are sequentially connected, a local oscillation signal of the local oscillator
Output end is connected with the input of the first frequency mixer；The vertical polarized antenna, the 3rd low-noise amplifier, the 4th low noise are put
Big device, the second wave filter, the second frequency mixer, integrated switch, the second intermediate frequency amplifier and another export head are sequentially connected, described
Another local oscillation signal output end of local oscillator is connected with the input of the second frequency mixer.
Further, the frequency mixer is transistor mixer.It is mixed using triode, it is possible to achieve mixing and amplification
Effect.
Further, the integrated switch is 4x2 integrated circuit matrix combination switches, using GW8875B chips.Integrated circuit
The advantages such as matrix combination switch has small power consumption, small volume, economical and practical, fault rate is low.
Further, local oscillation signal frequency caused by the local oscillator is 5150MHz.With 5150MHz local oscillation signal
950MHz-1750MHz full range signal can be obtained after mixing.
Further, the wave filter is symmetrical expression cavity micro strip line type bandpass filter.The wave filter can be anti-by circuit
Penetrate coefficient to be preferably minimized, obtain higher saturation tolerance, relatively low saturation distortion.
The beneficial effects of the invention are as follows：A kind of C-band dual output medium this vibration shape dual polarization positive bias that the present invention uses
Lnb, using a kind of low-noise amplifier without negative pressure biasing, circuit is simplified, high degree reduces product
Cost and spillage of material, using integrated switch, reduce circuit power consumption, volume-diminished and economical and practical；Two output ends are realized
Two users share tuner LNBF and antenna, have saved cost and environment space.
Brief description of the drawings
The invention will be further described with example below in conjunction with the accompanying drawings.
Fig. 1 is the schematic block circuit diagram of the embodiment of the present invention；
Fig. 2 is the circuit theory diagrams of the embodiment of the present invention；
Fig. 3 is the frequency demultiplier structural representation of the embodiment of the present invention.
Embodiment
A kind of C-band dual output medium of the embodiment of the present invention this vibration shape dual polarization positive bias lnb, including
Waveguide 101, the tuner 102 being connected with waveguide 101, in the casing 103 and casing 103 that are arranged on tuner 102
Circuit module；The casing 103 is high noise immunity casing, is provided with two export heads 8；Set in the waveguide 101
It is equipped with the horizontally-polarized antenna 11 for receiving horizontal polarization signals and the vertical polarized antenna for receiving vertical polarization signal
12；
Shown in reference picture 1, the circuit module include low-noise amplifier, wave filter, frequency mixer, integrated switch 6 and in
Audio amplifier；The low-noise amplifier has four, respectively the first low-noise amplifier 21, the second low-noise amplifier 22,
3rd low-noise amplifier 23 and the 4th low-noise amplifier 24, first low-noise amplifier 21, the second low noise amplification
Device 22, the 3rd low-noise amplifier 23 and the 4th low-noise amplifier 24 use N-channel enhancement mode FET, it is only necessary to
Grid adds positive voltage to work, without providing negative bias voltage in addition；The wave filter has two, respectively the first wave filter
31 and second wave filter 32, the frequency mixer have two, respectively the first frequency mixer 41 and the second frequency mixer 42, the intermediate frequency are put
Big device has two, respectively the first intermediate frequency amplifier 71 and the second intermediate frequency amplifier 72；The circuit module also shakes including the machine
Device 5 is swung, the local oscillator 5 is media resonant oscillator, and it includes the local oscillation signal output end of the identical frequency of two outputs；
The horizontally-polarized antenna 11, the first low-noise amplifier 21, the second low-noise amplifier 22, the first wave filter
31st, the first frequency mixer 41, integrated switch 6, the first intermediate frequency amplifier 71 and an export head 8 are sequentially connected, the local oscillation
One local oscillation signal output end of device 5 is connected with the input of the first frequency mixer 41；The vertical polarized antenna 12, the 3rd low noise
Acoustic amplifier 23, the 4th low-noise amplifier 24, the second wave filter 32, the second frequency mixer 42, integrated switch 6, the second intermediate frequency are put
Big device 72 and another export head 8 are sequentially connected, another local oscillation signal output end of the local oscillator 5 and the second mixing
The input connection of device 42.
In the present embodiment, frequency mixer is transistor mixer, and integrated switch 6 is opened for 4x2 integrated circuit matrixes are compound
Close, local oscillation signal frequency caused by local oscillator 5 is 5150MHz, and wave filter is symmetrical expression cavity micro strip line type bandpass filtering
Device.
Shown in reference picture 2, illustrated by taking the first low-noise amplifier 21 as an example, its excess-three amplifier circuit in low noise
Principle is identical with the first low-noise amplifier 21, including a N-channel enhancement mode FET Q1, the enhanced field-effect of the N-channel
Pipe Q1 grid is connected with one end of signal input part and resistance R4, resistance R4 other ends ground connection, N-channel enhancement mode FET
Q1 drain electrode is connected with resistance R1 one end and signal output part, the other end of the resistance R1 and electric capacity C1 one end and power supply
Input connects, the electric capacity C1 ground connection；
In the present embodiment, the signal input part of the first low-noise amplifier 21 is connected with horizontally-polarized antenna 11, the first low noise
The signal output part of acoustic amplifier 21 is connected by electric capacity C3 with the signal input part of the second low-noise amplifier 22, the second low noise
The signal output part of amplifier 22 is connected by electric capacity C4 with the horizontal polarization input pin HL of GW8875B chips, the 3rd low noise
The signal input part of acoustic amplifier 23 is connected with vertical polarized antenna 12, and the signal output part of the 3rd low-noise amplifier 23 passes through electric capacity
C12 is connected with the signal input part of the 4th low-noise amplifier 24, and the signal output part of the 4th low-noise amplifier 24 passes through electricity
Hold C13 to be connected with the vertical polarization input pin VL of GW8875B chips.
During work, satellite television frequency range 3.4GHz-4.2GHz signal receives through horizontally-polarized antenna 11, through radio frequency microstrip
Transmission line to the first low-noise amplifier 21 carries out low noise amplification, the signal after the amplification of the first low-noise amplifier 21
By electric capacity C3 second of low noise amplification is carried out coupled to the second low-noise amplifier 22.Wherein the first low-noise amplifier 21
VDS voltages by filter capacitor C1 filter after through dropping resistor R1 provide 2V voltages, grid by impedance resistors R4 over the ground；Second low noise
The VDS power supplys of acoustic amplifier 22 by electric capacity C2 filter after through resistance R2 provide 2V voltages, grid by resistance R4 over the ground；Meanwhile defend
Star TV signal is vertically polarized antenna 12 and received, progress low noise amplification, and the low noise of its principle and horizontal polarization signals is put
It is big identical, repeat no more.Horizontal polarization signals and vertical polarization signal after low noise amplification twice, pass through micro-strip respectively respectively
Line style bandpass filter is filtered, and the local oscillation signal after filtering respectively with 5150MHz is mixed to obtain by triode frequency mixer
950MHz-1750MHz full range signal, then it is respectively connected to the horizontal polarization input pin HL of GW8875B chips and vertical pole
Change input pin VL, after GW8875B chips carry out signal distribution and switch identification respectively by horizontal polarization output pin V1 and
Vertical polarization output pin V2 coupled electric capacity C6 and electric capacity C8 are independently exported.
It is described above, simply presently preferred embodiments of the present invention, the invention is not limited in above-mentioned embodiment, as long as
It reaches the technique effect of the present invention with identical means, should all belong to protection scope of the present invention.
Claims (5)
1. a kind of C-band dual output medium this vibration shape dual polarization positive bias lnb, including waveguide (101) and ripple
Circuit in the tuner (102) of conduit (101) connection, the casing (103) and casing (103) being arranged on tuner (102)
Module；It is characterized in that：The casing (103) is anti-interference casing, is provided with two export heads (8)；The waveguide
Manage (101) interior horizontally-polarized antenna (11) being provided with for receiving horizontal polarization signals and for receiving vertical polarization signal
Vertical polarized antenna (12)；
The circuit module includes low-noise amplifier, wave filter, frequency mixer, integrated switch (6) and intermediate frequency amplifier；It is described low
Noise amplifier has four, and respectively the first low-noise amplifier (21), the second low-noise amplifier (22), the 3rd low noise are put
Big device (23) and the 4th low-noise amplifier (24), first low-noise amplifier (21), the second low-noise amplifier (22),
3rd low-noise amplifier (23) and the 4th low-noise amplifier (24) use N-channel enhancement mode FET；The filtering
Device has two, and respectively the first wave filter (31) and the second wave filter (32), the frequency mixer have two, the respectively first mixing
Device (41) and the second frequency mixer (42), the intermediate frequency amplifier have two, in respectively the first intermediate frequency amplifier (71) and second
Audio amplifier (72)；The circuit module also includes local oscillator (5), and the local oscillator (5) is vibrated for dielectric resonance
Device, it includes the local oscillation signal output end of the identical frequency of two outputs；
The horizontally-polarized antenna (11), the first low-noise amplifier (21), the second low-noise amplifier (22), the first wave filter
(31), the first frequency mixer (41), integrated switch (6), the first intermediate frequency amplifier (71) and an export head (8) are sequentially connected, institute
A local oscillation signal output end for stating local oscillator (5) is connected with the input of the first frequency mixer (41)；The vertical polarization
Antenna (12), the 3rd low-noise amplifier (23), the 4th low-noise amplifier (24), the second wave filter (32), the second frequency mixer
(42), integrated switch (6), the second intermediate frequency amplifier (72) and another export head (8) are sequentially connected, the local oscillator
(5) another local oscillation signal output end is connected with the input of the second frequency mixer (42).
2. this vibration shape of a kind of C-band dual output medium dual polarization positive bias lnb according to claim 1, its
It is characterised by：The frequency mixer is transistor mixer.
3. this vibration shape of a kind of C-band dual output medium dual polarization positive bias lnb according to claim 1, its
It is characterised by：The integrated switch (6) is 4x2 integrated circuit matrix combination switches, using GW8875B chips.
4. this vibration shape of a kind of C-band dual output medium dual polarization positive bias lnb according to claim 1, its
It is characterised by：Local oscillation signal frequency caused by the local oscillator (5) is 5150MHz.
5. this vibration shape of a kind of C-band dual output medium dual polarization positive bias lnb according to claim 1, its
It is characterised by：The wave filter is symmetrical expression cavity micro strip line type bandpass filter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711139367.1A CN107864348A (en) | 2017-11-16 | 2017-11-16 | A kind of C-band dual output medium this vibration shape dual polarization positive bias lnb |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711139367.1A CN107864348A (en) | 2017-11-16 | 2017-11-16 | A kind of C-band dual output medium this vibration shape dual polarization positive bias lnb |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109451509A (en) * | 2019-01-07 | 2019-03-08 | 上海创远仪器技术股份有限公司 | NB-IOT base station signal measuring device and its measurement processing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206060957U (en) * | 2016-08-30 | 2017-03-29 | 中山市瀚扬电子科技有限公司 | The vehicle-mounted frequency demultiplier of the double local oscillator dual output high-gain low-noises of dual polarization |
| CN206136105U (en) * | 2016-10-31 | 2017-04-26 | 深圳翔成电子科技有限公司 | Weak signal area special KU frequency channel dual -port output tuner |
| CN207491098U (en) * | 2017-11-16 | 2018-06-12 | 珠海市普斯赛特科技有限公司 | A kind of C-band dual output medium this vibration shape dual polarization positive bias low noise frequency reducer |
-
2017
- 2017-11-16 CN CN201711139367.1A patent/CN107864348A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206060957U (en) * | 2016-08-30 | 2017-03-29 | 中山市瀚扬电子科技有限公司 | The vehicle-mounted frequency demultiplier of the double local oscillator dual output high-gain low-noises of dual polarization |
| CN206136105U (en) * | 2016-10-31 | 2017-04-26 | 深圳翔成电子科技有限公司 | Weak signal area special KU frequency channel dual -port output tuner |
| CN207491098U (en) * | 2017-11-16 | 2018-06-12 | 珠海市普斯赛特科技有限公司 | A kind of C-band dual output medium this vibration shape dual polarization positive bias low noise frequency reducer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109451509A (en) * | 2019-01-07 | 2019-03-08 | 上海创远仪器技术股份有限公司 | NB-IOT base station signal measuring device and its measurement processing method |
| CN109451509B (en) * | 2019-01-07 | 2024-04-19 | 上海创远仪器技术股份有限公司 | NB-IOT base station signal measuring equipment and its measuring processing method |
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