CN202737811U - C-BAND double-local-oscillator multiplexed-output down converter - Google Patents
C-BAND double-local-oscillator multiplexed-output down converter Download PDFInfo
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- CN202737811U CN202737811U CN201220418329.6U CN201220418329U CN202737811U CN 202737811 U CN202737811 U CN 202737811U CN 201220418329 U CN201220418329 U CN 201220418329U CN 202737811 U CN202737811 U CN 202737811U
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Abstract
The utility model relates to a C-BAND double-local-oscillator multiplexed-output down converter and belongs to the technical field of direct broadcasting satellite signal processing and transmission. According to the utility model, an input terminal of V (vertical) polarization signals is connected with a down V frequency converting circuit through a V radio frequency amplifier and a V microwave band-pass filter of 3.7 GHz to 4.2 GHz. An input terminal of H (horizontal) polarization signals is connected with a down H frequency converting circuit through an H radio frequency amplifier and an H microwave band-pass filter of 3.7 GHz to 4.2 GHz. The C-BAND double-local-oscillator multiplexed-output down converter provided by the utility model can suppress interference of out-of-band signals well, thereby making the signal receiving in a frequency band smooth. And the structure of the C-BAND double-local-oscillator multiplexed-output down converter is simplified.
Description
Technical field
The present invention relates to a kind of satellite direct broadcast signals and process transmitting device, relate in particular to the two local oscillator multichannel output of a kind of C-BAND low-converter.
Background technology
Present domsat live signal is mainly the linear polarization signal of C-band.The C-band low-converter is commonly called as tuner, is mainly used in the reception of satellite-signal.This product assembles the PCB wiring board to realize its function by metal chassis.The satellite-signal of linear polarization is divided into H horizontal polarization and V perpendicular polarization, present tuner is received respectively the signal of two H/V polarization by two probes in the metal chassis, microwave signal is guided on the PCB circuit board that is connected with probe, amplify three parts by low noise amplifier and mixing and intermediate frequency above the PCB wiring board and form.By circuit finish to after the High frequency amplification of signal and the mixing frequency-conversion processing again intermediate frequency amplify, last single port output is sent to satellite receiver with coaxial cable.Yet, the tuner that existing state includes C-band, Ku wave band but is single local oscillator, single port output products mostly, tuner of one secondary planet antenna can only satisfy a user and receive, along with developing rapidly of satellite transmission business, the satellite transmission business is just progressively to high band, digitlization, broadband multimedia integrated service transition, the domsat resource will further be opened, the tuner receiving system needs multichannel, the receiving system of single port output can become and become increasingly complex, and can not satisfy the increasingly individual demand of fashion of the whole society.
In order to simplify receiving system, on June 18th, 2008 Chinese utility model patent Granted publication CN 201075397Y, the input that discloses " the two local oscillator multichannels output of C-band low-converter " this low-converter that Chenzhou GOSPELL Digital Technology Co., Ltd researches and develops and be at the signal of H level/V perpendicular polarization has guiding probe 1, guiding probe 2 to connect respectively two cover lower frequency changer circuits; After the frequency mixer 7 of described two cover lower frequency changer circuits, the output of frequency mixer 8 connect first order intermediate level circuit 11 and first order intermediate level circuit 12, through little band signal mixer 13 two paths of signals is merged into one the tunnel, connect again a little band signal power splitter 15 through second level intermediate level circuit 14 output signal is divided into two-way; Next the two-way output signal connects little band signal power splitter 18, little band signal power splitter 19 through third level intermediate level circuit 16, third level intermediate level circuit 17 respectively again again, forms four road signals and independently exports; The front end of the frequency mixer 7 in the above-mentioned lower frequency changer circuit have the height of two-stage low noise high-gain field effect transistor put 3 and height put 5; The front end of the frequency mixer 8 in the above-mentioned lower frequency changer circuit have the height of two-stage low noise high-gain field effect transistor put 4 and height put 6; Local oscillator on the frequency mixer 7 is 5.15GHz ceramic dielectric oscillator 9; Local oscillator on the frequency mixer 8 is the ceramic dielectric oscillator 10 of 5.75GHz; Above-mentioned lower frequency changer circuit, little band signal mixer 13, little band signal power splitter 15, little band signal power splitter 18,19, first, second, and third grades of all intermediate level circuits of little band signal power splitter all are integrated on the PCB wiring board.This low-converter occurs disturbing owing to use little band signal mixer that two paths of signals is merged into one the tunnel unavoidably.
Summary of the invention
The technical problem to be solved in the present invention is: remedy the deficiencies in the prior art, the two local oscillator multichannel output of a kind of C-BAND low-converter is proposed, do not need little band signal mixer, use the microwave band-pass filter of 3.7GHz-4.2GHz, interference that can well the inhibition zone external signal, thereby make the signal reception in the frequency band more smooth and easy, and structure is more simple.
Technical scheme of the present invention is: the two local oscillator multichannel output of a kind of C-BAND low-converter is characterized in that the input process V radio frequency amplifier of the signal of V perpendicular polarization, the V microwave band-pass filter of 3.7GHz-4.2GHz connect lower V frequency changer circuit; The output of the V frequency mixer of described lower V frequency changer circuit is divided into two-way through a little band signal V power splitter with output signal after connecting the V intermediate level circuit through a V microwave band-pass filter again; The local frequency of described V frequency mixer is 5.15GHz GHz; The input of the signal of H horizontal polarization connects lower H frequency changer circuit through the H microwave band-pass filter of H radio frequency amplifier, 3.7GHz-4.2GHz; The output of the H frequency mixer of described lower H frequency changer circuit is divided into two-way through a little band signal H power splitter with output signal after connecting the H intermediate level circuit through a H microwave band-pass filter again; The local frequency of described H frequency mixer is 5.75GHz; Above-mentioned all intermediate level circuits and the H/V microwave band-pass filter of 3.7GHz-4.2GHz all are integrated on the PCB wiring board.
The present invention adopts the microwave ceramics medium oscillator that local oscillating frequency is provided, two local frequencies are respectively 5.15GHz/5.75GHz, linear polarization signal for C-BAND, two local oscillator corresponding one road signals of difference (horizontal polarization signal or perpendicular polarization signal) carry out Frequency mixing processing, the intermediate-freuqncy signal spectrum control of two polarization is in a frequency band, thus the switching that does not need H/V to polarize.After dividing through the two-way merit, one road signal is divided into four tunnel separate glitch-free signals.
Compared with the prior art, the circuit design model of the two local oscillator multiple output products of C-BAND of the present invention is to horizontal polarization and the independent Gao Fanghou of perpendicular polarization, utilize the difference (differing 600MHz) of local oscillating frequency, thereby the intermediate frequency output signal of two polarization is moved in the different frequency band (950-1450MHz/1550-2050MHz), through the H/V of 3.7GHz-4.2GHz microwave band-pass filter, output signal is amplified, through once little distribution that divides with merit, one road signal is divided into two-way, two paths of signals all has H simultaneously, the signal of two polarization of V, and signal is divided into four the tunnel the most at last, this four road signal is separate, simultaneously output and can the phase mutual interference.The technical advantage of this product maximum has been for having used the microwave band-pass filter of 3.7GHz-4.2GHz at PCB, interference that can well the inhibition zone external signal, thus make the signal in the frequency band receive more smooth and easy.Technique effect of the present invention has the ultra-low noise coefficient; Superelevation dielectric oscillator stability and gain flatness; Be fit to round-the-clock use
The present invention is mainly used in the reception of (3700MHz-4200 MHz) C-band satellite-signal, and signal finally is divided into four road signals by microstrip power divider with one road signal, and four road independent receptions can not disturbed each other.Realized many families of machine resource-sharing.Also reduce simultaneously the cost of satellite reception, promoted to a certain extent the satellite television industrialized development.
Description of drawings
The utility model is elaborated with instantiation below in conjunction with accompanying drawing.
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
As shown in Figure 1, the two local oscillator multichannel output of a kind of C-BAND low-converter is that the input process H radio frequency amplifier (RF.AMP) of the signal of H (18V) horizontal polarization, the H microwave band-pass filter (BPF) of 3.7GHz-4.2GHz connect lower H frequency changer circuit (MIXER); After the output of the H frequency mixer of described lower H frequency changer circuit (MIXER) connects H intermediate level circuit (IF.AMP) through a H microwave band-pass filter (BPF) again, through a little band signal H power splitter (LBF) output signal is divided into two-way (OUT3 OUT4); The local frequency of described H frequency mixer (L.O) is 5.75GHz; The input of the signal of V (13V) perpendicular polarization connects lower V frequency changer circuit (MIXER through the V microwave band-pass filter (BPF) of V radio frequency amplifier (RF.AMP), 3.7GHz-4.2GHz; Described lower V frequency changer circuit (after the output of the V frequency mixer of MIXER connects V intermediate level circuit (IF.AMP) through a V microwave band-pass filter (BPF) again, through a little band signal V power splitter (LBF) with output signal be divided into two-way (OUT1 OUT2; The local frequency of described V frequency mixer (L.O) is 5.15GHz GHz; Above-mentioned all intermediate level circuits and the H/V microwave band-pass filter of 3.7GHz-4.2GHz all are integrated on the PCB wiring board.
Claims (1)
1. the two local oscillator multichannel output of a C-BAND low-converter is characterized in that the input process V radio frequency amplifier of the signal of V perpendicular polarization, the V microwave band-pass filter of 3.7GHz-4.2GHz connect lower V frequency changer circuit; The output of the V frequency mixer of described lower V frequency changer circuit is divided into two-way through a little band signal V power splitter with output signal after connecting the V intermediate level circuit through a V microwave band-pass filter again; The local frequency of described V frequency mixer is 5.15GHz GHz; The input of the signal of H horizontal polarization connects lower H frequency changer circuit through the H microwave band-pass filter of H radio frequency amplifier, 3.7GHz-4.2GHz; The output of the H frequency mixer of described lower H frequency changer circuit is divided into two-way through a little band signal H power splitter with output signal after connecting the H intermediate level circuit through a H microwave band-pass filter again; The local frequency of described H frequency mixer is 5.75GHz; Above-mentioned all intermediate level circuits and the H/V microwave band-pass filter of 3.7GHz-4.2GHz all are integrated on the PCB wiring board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220418329.6U CN202737811U (en) | 2012-08-22 | 2012-08-22 | C-BAND double-local-oscillator multiplexed-output down converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220418329.6U CN202737811U (en) | 2012-08-22 | 2012-08-22 | C-BAND double-local-oscillator multiplexed-output down converter |
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| Publication Number | Publication Date |
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| CN202737811U true CN202737811U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220418329.6U Expired - Lifetime CN202737811U (en) | 2012-08-22 | 2012-08-22 | C-BAND double-local-oscillator multiplexed-output down converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104079897A (en) * | 2014-07-08 | 2014-10-01 | 中广联合移动电视系统有限公司 | Mobile satellite television receiving system |
-
2012
- 2012-08-22 CN CN201220418329.6U patent/CN202737811U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104079897A (en) * | 2014-07-08 | 2014-10-01 | 中广联合移动电视系统有限公司 | Mobile satellite television receiving system |
| CN104079897B (en) * | 2014-07-08 | 2020-07-03 | 中广联合移动电视系统有限公司 | Mobile satellite television receiving system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180814 Address after: 423038 Gauss, Baer Industrial Park, Guan Shan cave street, Suxian District, Chenzhou, Hunan Patentee after: GOSPELL DIGITAL TECHNOLOGY Co.,Ltd. Address before: 423000 Gauss, Baer Industrial Park, Bailu Town, Suxian District, Chenzhou, Hunan Patentee before: CHENZHOU XIDIAN TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |