CN202077025U - KU band tuner using single cable for transmission - Google Patents
KU band tuner using single cable for transmission Download PDFInfo
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- CN202077025U CN202077025U CN2011201642515U CN201120164251U CN202077025U CN 202077025 U CN202077025 U CN 202077025U CN 2011201642515 U CN2011201642515 U CN 2011201642515U CN 201120164251 U CN201120164251 U CN 201120164251U CN 202077025 U CN202077025 U CN 202077025U
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- mixer
- intermediate frequency
- frequency amplifier
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- amplifier
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Abstract
The utility model discloses a KU band tuner using a single cable for transmission, comprising a shell and an internal signal processing circuit, wherein the signal processing circuit comprises a feed source for gathering linearly polarized satellite signals and two low noise amplifiers connected with the feed source, the two low noise amplifiers are respectively connected with a band-pass filter and a frequency mixer in one time, and each frequency mixer is respectively and sequentially connected to a first-stage intermediate frequency amplifier and a second-stage intermediate frequency amplifier. The KU band tuner is characterized by also comprising a combiner, wherein the combiner is arranged between the first-stage and the second-stage intermediate frequency amplifiers, and communicated to an only output interface through the second-stage intermediate frequency amplifier. The KU band tuner simplifies system composition, converts satellite high frequency signals into satellite intermediate frequency signals for receiving by adopting the combiner under the premises of high gain, low noise and high isolation, and especially uses the combiner for the mixed output of one path of intermediate frequency signals which are mutually independent in working without interference.
Description
Technical field
The utility model relates to satellite receiving equipment, relates in particular to satellite earth antenna and tuner.
Background technology
The numerous digital television program in the whole world is launched via satellite and is transmitted, the pleasure of the senses of digital TV in high resolution is provided for countless spectators, constantly upgrade perfect as the satellite earth antenna technology of Digital Television hardware equipped simultaneously, the satellite that moves in the space simultaneously is also more and more, in the prior art, satellite audiovisual receiving system commonly used generally includes antenna, be in the feed at antenna-reflected center, tuner that is connected with feed and digital satellite receiver, because what the satellite audiovisual transmitted employing is microwave, has optics straightline propagation characteristic, for C frequency range and KU frequency range, generally adopt and have the very parabola surface antenna of highly directive, the effect of antenna is to utilize the principle of geometric optics to assemble to focus from aerial satellite-signal energy reflection, by the feed that is on the focus electric wave signal conduction that desire receives is flowed to the tuner that is right after thereafter again, the effect of tuner is output again after the small-signal that antenna is received is amplified, be sent to satellite receiver with coaxial cable, satellite receiver is carried tuner and come is that satellite-signal carries out demodulation, demodulates satellite image signal and audio signal.At present, all satellite tuners can be divided into single local oscillator and two local oscillator tuner according to the local oscillator classification; Can be divided into single polarization according to polarization mode, dual polarization, linear polarization and circular polarization tuner; Can be divided into single star according to the receiving satellite amount, double star, many stars tuner; Can be divided into single output according to output, dual output, four outputs and eight output tuners; Can be divided into the C frequency range again according to application band, KU frequency range and KA frequency range tuner.
In traditional direct broadcasting satellite (DBS) is installed. in the face of satellite receiver or a plurality of satellite receiver of a plurality of high-frequency tuners are housed, in order to make DBS outdoor unit (ODU, Out-door Unit) links to each other with these tuners, need many independently cables, this application scheme has increased the complexity of installing greatly. and pay very high cable laying cost.
Summary of the invention
The utility model provides the single cable of a kind of use to finish the audio visual signal transmission for addressing the above problem, and reduces the quantity of cable, only needs very simply to install.
The technical scheme that the utility model addresses the above problem is: the KU wave band tuner of the single cable transmission of described use, comprise shell and internal signal treatment circuit, described signal processing circuit comprises the feed of assembling the linear polarization satellite-signal, the two-way low noise amplifier that is connected with feed and respectively horizontal line polarized signal and vertical line polarized signal is amplified, be connected with No. one band pass filter on the two-way low noise amplifier respectively, be connected with No. one frequency mixer respectively on each road band pass filter, be connected with the two-stage intermediate frequency amplifier respectively on each road frequency mixer, its feature with, also comprise a mixer in the described signal processing circuit, the two-stage intermediate frequency amplifier is connected to an independently mixer, be input to an independently mixer by the signal of handling, described mixer is communicated to a unique output interface by the digital satellite receiver control connection by mixer.
Described mixer is two to advance a mixer that outes, and mainly carries out channeling.
The method that described tuner uses single cable to transmit is characterized in that, has utilized receiver to be adjusted to different downstream frequencys, and 9.71GHz or 9.75GHz come the satellite-signal that is received is distinguished reception.
Being provided with two polarization probes in the described feed, is respectively perpendicular polarization probe and horizontal polarization probe, and horizontal polarization probe and perpendicular polarization probe are 90 ° mutually.
Described low noise amplifier adopts three grades of low noise amplifiers that are connected in series mutually.
Described output interface is for linking to the interface of digital satellite receiver by cable.
The beneficial effects of the utility model: the composition of having simplified system, adopt mixer under the prerequisite of high-gain, low noise, high-isolation, the satellite high-frequency signal to be converted to the satellite intermediate-freuqncy signal and receive, especially use mixer to mix output one tunnel and work alone and glitch-free intermediate-freuqncy signal mutually.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams.
Among the figure: 01, perpendicular polarization probe; 11, horizontal polarization probe; 21, first low noise amplifier; 22, second low noise amplifier; 31, first band pass filter; 32, second band pass filter; 41, first frequency mixer; 42, second frequency mixer; 51, first local oscillator; 52, second local oscillator; 61, first order intermediate frequency amplifier I; 62, first order intermediate frequency amplifier II; 71, mixer; 81, second level intermediate frequency amplifier.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, following examples are further elaborated to the utility model.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The KU wave band tuner of the single cable transmission of described use, comprise shell and internal signal treatment circuit, described signal processing circuit comprises the feed of assembling the linear polarization satellite-signal, the two-way low noise amplifier that is connected with feed and respectively horizontal line polarized signal and vertical line polarized signal is amplified, be connected with No. one band pass filter on the two-way low noise amplifier respectively, be connected with No. one frequency mixer respectively on each road band pass filter, be connected with first order intermediate frequency amplifier and second level intermediate frequency amplifier on each road frequency mixer respectively in turn, its feature with, also comprise a mixer in the described signal processing circuit, connecting one between first order intermediate frequency amplifier and the second level intermediate frequency amplifier independently behind the mixer, two-way first order intermediate frequency amplifier is connected to a mixer, described mixer is connected to a second level intermediate frequency amplifier, described mixer is communicated to a unique output interface by the digital satellite receiver control connection by second level intermediate frequency amplifier.
Described mixer is two to advance a mixer that outes, and mainly carries out channeling.
The method that described tuner uses single cable to transmit, it is characterized in that, utilized a kind of channeling technology, utilize receiver to be adjusted to different downstream frequencys, come the satellite-signal that is received is distinguished reception as 9.71GHz or 9.75GHz, and these two groups of satellite-signals come by same cable transmission.
Being provided with two polarization probes in the described feed, is respectively perpendicular polarization probe and horizontal polarization probe, and horizontal polarization probe and perpendicular polarization probe are 90 ° mutually.
Described low noise amplifier adopts three grades of low noise amplifiers that are connected in series mutually.
Described output interface is for linking to the interface of digital satellite receiver by cable.
Described tuner is arranged between antenna and the satellite receiver, in the signal processing circuit of the present utility model, utilize the feed receiving satellite signal, signal is by exporting to perpendicular polarization probe 01, horizontal polarization probe 11 then, vertical line polarized signal and horizontal line polarized signal are exported to low noise amplifier respectively and are amplified after perpendicular polarization probe 01 and 11 couplings of horizontal polarization probe, in the present embodiment, perpendicular polarization probe 01 and horizontal polarization probe 11 material be the silver-plated or iron nickel plating of iron.Low noise amplifier comprises first low noise amplifier 21 and second low noise amplifier 22, respectively vertical line polarized signal (VLP) and horizontal line polarized signal (HLP) are carried out the signal amplification by first low noise amplifier 21 and second low noise amplifier 22, make its gain of satisfying system requirements and noise figure, the amplifier model of three series connection is respectively: NE3503S01, MGF4934, MGF4931.Signal after amplifier amplifies is exported to first band pass filter 31 and second band pass filter 32 respectively, the logical frequency of the band of two band pass filters is 10.7-11.7GHz, mainly filter out the unwanted frequency band of system by first band pass filter 31 and second band pass filter 32, the mixing interface level and the inband flatness that meet subsequent request are provided, to reduce the combination frequency that follow-up mixing produces, play the effect that mirror image disturbed and guaranteed spectral purity that suppresses.In the present embodiment, first band pass filter, 31 output vertical line polarized signals (VLP), second band pass filter, 32 output horizontal line polarized signals (HLP), the two-way band pass filter is exported to frequency mixer 41 and frequency mixer 42 respectively, first frequency mixer 41 is connected with first local oscillator 51, and it is the 9.75GHz oscillator signal that local oscillator 51 provides frequency.First frequency mixer 41 becomes the road 950-1950MHz intermediate-freuqncy signal that digital satellite receiver can be handled with the high-frequency signal mixing that first band pass filter 31 produces, second frequency mixer 42 is connected with second local oscillator 52, and it is the 9.71GHz oscillator signal that second local oscillator 52 provides frequency.Second frequency mixer 42 becomes the road 990-1990MHz intermediate-freuqncy signal that digital satellite receiver can be handled with the high-frequency signal mixing that second band pass filter 32 produces; The intermediate-freuqncy signal of first frequency mixer, 41 output vertical line polarization, the intermediate-freuqncy signal of second frequency mixer, 42 output horizontal line polarization, in the present embodiment, the concrete model that first frequency mixer 41 and second frequency mixer 42 adopt is: ALPHA7621.Two-way intermediate-freuqncy signal after frequency mixer is handled is sent into first order intermediate frequency amplifier I 61 respectively, in the first order intermediate frequency amplifier II 62, wherein first order intermediate frequency amplifier I 61 is amplified vertical line polarization intermediate-freuqncy signal, first order intermediate frequency amplifier II 62 is amplified horizontal line polarization intermediate-freuqncy signal, after the intermediate frequency amplifier processing, can make the two-way intermediate-freuqncy signal obtain enough level and satisfactory carrier-to-noise ratio, present embodiment first order intermediate frequency amplifier I 61, the concrete model that first order intermediate frequency amplifier II 62 adopts is: PHILIPS2712.
The utility model is in two-way first order intermediate frequency amplifier I 61, back in the first order intermediate frequency amplifier II 62, be connected to the mixer 71 of one tunnel two input, one output, in the present embodiment, mixer 71 is controlled by the direct current 13V control signal that digital satellite receiver provides.
Be connected to a second level intermediate frequency amplifier 81 on mixer 71 outputs, intermediate frequency amplifier 81 concrete models in the second level are PHILIPS2709 or PHILIPS1014 in the present embodiment.Second level intermediate frequency amplifier 81 can be to the compensating of the signal attenuation that produces after mixer 71 mixing, to reach the level specification of system requirements.After intermediate frequency amplifier 81 pairs of signals in the second level amplify, export signal to the utility model output interface PORT, be connected to digital satellite receiver through cable, just can arrive user side.
The utility model has been simplified the assembling of system, with minimum components and parts, not only minimum cost is guaranteeing high-gain, low noise, under the prerequisite of high-isolation the satellite high-frequency signal being converted to the satellite intermediate-freuqncy signal receives, especially use mixer can mix output one tunnel separate work and glitch-free intermediate-freuqncy signal and carry out work, overcome the limitation of at present common on the market tuner list output, satisfy the demand of consumer greatly single output tuner high-end product.The utility model can be widely used in direct broadcasting satellite and Digital Television DVB-C system headend, with satellite antenna, satellite receiver combination, finishes the reception of satellite audio visual signal.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (4)
1. KU wave band tuner that uses single cable transmission, comprise shell and internal signal treatment circuit, described signal processing circuit comprises the feed of assembling the linear polarization satellite-signal, the two-way low noise amplifier that is connected with feed and respectively horizontal line polarized signal and vertical line polarized signal is amplified, be connected with No. one band pass filter on the two-way low noise amplifier respectively, be connected with No. one frequency mixer respectively on each road band pass filter, be connected to first order intermediate frequency amplifier and second level intermediate frequency amplifier on each road frequency mixer respectively in turn, it is characterized in that, also comprise a mixer in the described signal processing circuit, between first order intermediate frequency amplifier and second level intermediate frequency amplifier, connecting an independently mixer, two-way first order intermediate frequency amplifier is connected to a mixer, described mixer is connected to a second level intermediate frequency amplifier, described mixer is communicated to a unique output interface by the digital satellite receiver control connection by second level intermediate frequency amplifier.
2. according to the KU wave band tuner of the single cable transmission of the described use of claim 1, it is characterized in that described mixer is two to advance a mixer that outes.
3. according to the KU wave band tuner of the single cable transmission of the described use of claim 1, it is characterized in that, be provided with two polarization probes in the described feed, is respectively perpendicular polarization probe and horizontal polarization probe, and horizontal polarization probe and perpendicular polarization probe are 90 ° mutually.
4. according to the KU wave band tuner of the single cable transmission of the described use of claim 1, it is characterized in that described output interface is for linking to the interface of digital satellite receiver by cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201642515U CN202077025U (en) | 2011-05-23 | 2011-05-23 | KU band tuner using single cable for transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201642515U CN202077025U (en) | 2011-05-23 | 2011-05-23 | KU band tuner using single cable for transmission |
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| CN202077025U true CN202077025U (en) | 2011-12-14 |
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| CN2011201642515U Expired - Fee Related CN202077025U (en) | 2011-05-23 | 2011-05-23 | KU band tuner using single cable for transmission |
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Cited By (5)
| 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 |
| CN108848357A (en) * | 2018-09-20 | 2018-11-20 | 珠海市普斯赛特科技有限公司 | A kind of KU single-cable extended pattern frequency demultiplier |
| CN109068076A (en) * | 2018-10-11 | 2018-12-21 | 珠海佳讯创新科技股份有限公司 | The high-frequency tuner of Ku band satellite signal is transmitted and distributed by coaxial cable |
| CN109510957A (en) * | 2018-12-04 | 2019-03-22 | 安徽站乾科技有限公司 | A kind of optical fiber satellite low noise block |
| CN111314752A (en) * | 2019-12-27 | 2020-06-19 | 深圳市北斗万方信息技术有限公司 | Low-noise down converter and signal processing method |
-
2011
- 2011-05-23 CN CN2011201642515U patent/CN202077025U/en not_active Expired - Fee Related
Cited By (7)
| 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 |
| CN108848357A (en) * | 2018-09-20 | 2018-11-20 | 珠海市普斯赛特科技有限公司 | A kind of KU single-cable extended pattern frequency demultiplier |
| CN109068076A (en) * | 2018-10-11 | 2018-12-21 | 珠海佳讯创新科技股份有限公司 | The high-frequency tuner of Ku band satellite signal is transmitted and distributed by coaxial cable |
| CN109510957A (en) * | 2018-12-04 | 2019-03-22 | 安徽站乾科技有限公司 | A kind of optical fiber satellite low noise block |
| CN111314752A (en) * | 2019-12-27 | 2020-06-19 | 深圳市北斗万方信息技术有限公司 | Low-noise down converter and signal processing method |
| CN111314752B (en) * | 2019-12-27 | 2023-12-01 | 深圳市北斗万方信息技术有限公司 | Low-noise down converter and signal processing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20180523 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |