CN103269428A - Satellite audio-visual receiving system based on KU wave band and satellite tuner - Google Patents
Satellite audio-visual receiving system based on KU wave band and satellite tuner Download PDFInfo
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- CN103269428A CN103269428A CN 201310089873 CN201310089873A CN103269428A CN 103269428 A CN103269428 A CN 103269428A CN 201310089873 CN201310089873 CN 201310089873 CN 201310089873 A CN201310089873 A CN 201310089873A CN 103269428 A CN103269428 A CN 103269428A
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Abstract
The invention provides a satellite tuner, which comprises a shell, two feed sources, an output interface and a signal processing circuit, wherein the two feed sources and the output interface are arranged on the shell; and the signal processing circuit is arranged in the shell. The invention provides a satellite audio-visual receiving system based on a KU wave band and the satellite tuner. Through the system, visual-audio signals of two satellites can be received simultaneously, and the received signals can be redistributed through a DiSEqC (Digital satellite Equipment Control) switching program, so that a plurality of users can use simultaneously. Due to the adoption of the system, the utilization ratio of a product is increased greatly on the aspects of cost and installation convenience.
Description
Technical field
The present invention relates to the satellite industry technical field, relate in particular to a kind of based on KU band satellite audiovisual receiving system and satellite tuner.
Background technology
Along with the development of global satellite industry and opening gradually of China's direct broadcasting satellite policy, there is the very big rising space consumption market to the demand of satellite audiovisual receiving system.In the prior art, the complete satellite earth receiving station of a cover that satellite audiovisual receiving system all is made up of parabolic antenna, tuner, digital satellite receiver.Mostly present satellite audiovisual receiving system is to adopt the KU wave band, for the KU wave band, effect as the tuner of satellite audiovisual receiving system core component is that the small-signal that antenna is received is carried out amplification filtering, and amplify output again after satellite high-frequency signal 10.7-12.75GHz being down-converted to the intermediate-freuqncy signal of 950 ~ 2150MHz frequency range, be sent to digital satellite receiver with coaxial cable, digital satellite receiver carries out demodulation with the satellite-signal that the tuner transmission is sent here again, demodulates satellite image signal and audio signal.
The tuner of main flow all can only receive single satellite-signal on the market at present, when using, this kind tuner has a very big defective, namely a satellite tuner of installing on parabolic antenna can only receive the live signal of a satellite, can only set up parabolic antenna again or a plurality of single star tuner personnel selection clamping apparatuss are fixed on a day line focus place if will receive a plurality of satellite-signals, use a DiSEqC(Digital satellite Equipment Control again: the digital satellite device control protocol) switch carries out single port output.Above-mentioned two kinds of artificial mode defectives that receive many stars have all increased cost undoubtedly, and install complicated.In addition, because a DiSEqC switch can only advance a function restriction that outes more, these receive modes can only have a port output, can only be used by a user, can not satisfy the demand of user's multichannel output.
Summary of the invention
The object of the present invention is to provide a kind of satellite tuner, realize that a satellite tuner receives the audio visual signal of two satellites simultaneously.
Another object of the present invention is to provide a kind of based on KU band satellite audiovisual receiving system, can receive KU wave band expanded application to four a port output simultaneously of two satellite transmission signal simultaneously.
The objective of the invention is to be achieved through the following technical solutions.
A kind of satellite tuner, comprise shell, be arranged on two feeds and the output interfaces on the shell and in the enclosure signal processing circuit is set, described signal processing circuit and each feed are connected with the polarization probe that two-way carries out perpendicular polarization and horizontal polarization coupling respectively, every road polarization probe is connected with No. one low noise amplifier respectively, be connected with first order microstrip line two power splitters in the output of each road low noise amplifier four road satellite-signals are divided into eight the tunnel, eight road signals are respectively through band pass filter, frequency mixer, first order intermediate frequency amplifier and second level microstrip line two power splitter connect and are divided into ten six road signals and four kinds of different polarization and the intermediate-freuqncy signal of wave band mode, these four kinds of intermediate-freuqncy signals are advanced two matrixes that go out through four four respectively it are become eight tunnel intermediate-freuqncy signals, eight tunnel intermediate-freuqncy signals are advanced a digital satellite device control protocol switch that outes through four the tunnel two again and are selected, produce four tunnel output signals, after second level intermediate frequency amplifier amplifies, be connected on the output interface, carry out multichannel and export simultaneously.
Preferably, described every road first order intermediate frequency amplifier output is connected with second level microstrip line two power splitters respectively, satellite-signal after the amplification of eight road intermediate frequencies is divided into ten six the tunnel, four second level microstrip line two power splitters that are connected with first feed output signal, two outputs of each second level microstrip line two power splitter are connected with the input of the first matrix selector switch and the 3rd matrix selector switch respectively, four second level microstrip line two power splitters that are connected with second feed output signal, two outputs of each second level microstrip line two power splitter are connected with the 4th matrix selector switch input with the second matrix selector switch respectively, the first matrix selector switch, the second matrix selector switch, the 3rd matrix selector switch and the 4th matrix selector switch are four and advance the two matrix selector switches that go out, two outputs of the first matrix selector switch are connected with the input of the first digital satellite device control protocol switch with the second digital satellite device control protocol switch respectively, two outputs of the second matrix selector switch are connected with another input of the first digital satellite device control protocol switch and the second digital satellite device control protocol switch respectively, two outputs of the 3rd matrix selector switch are connected with the input of the 3rd digital satellite device control protocol switch with the 4th digital satellite device control protocol switch respectively, two outputs of the 4th matrix selector switch are connected with another input of the 3rd digital satellite device control protocol switch and the 4th digital satellite device control protocol switch respectively, the output of each digital satellite device control protocol switch is connected with a second level intermediate frequency amplifier respectively, and each second level intermediate frequency amplifier is connected with an output interface.
Preferably, described feed adopts integrated die sinking die cast 4.3 degree feeds, and two feed central point distances are 4.3CM.
Preferably, the first digital satellite device control protocol switch, the second digital satellite device control protocol switch, the 3rd digital satellite device control protocol switch and the 4th digital satellite device control protocol switch are two and advance a digital satellite device control protocol switch that outes.
Preferably, described low noise amplifier adopts three grades of low noise amplifiers that are connected in series to form.
Preferably, described digital satellite device control protocol switch is provided with two kinds of patterns, and is a kind of for the control program acquiescence receives the first feed satellite-signal, a kind of for controlling the reception second feed satellite-signal.
A kind ofly it is characterized in that based on KU band satellite audiovisual receiving system, comprise being arranged on aforesaid satellite tuner between parabolic antenna and the digital satellite receiver.
The present invention compared with prior art, beneficial effect is: provided by the invention a kind of based on KU band satellite audiovisual receiving system and satellite tuner, can receive the audio visual signal of two satellites simultaneously, and by the DiSEqC switching programme, redistribute to the received signal, reach the effect that the multi-user uses simultaneously.From cost and on the property easy for installation, all improved the utilance of product greatly.
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Description of drawings
Fig. 1 realizes theory diagram for satellite high frequency tuner circuit of the present invention.
Embodiment
Core concept of the present invention: satellite tuner provided by the invention, its shell is provided with the feed of two Center Gap 4.3CM, be used for receiving simultaneously the linear polarization satellite-signal of two satellite emissions about 4.3 degree of being separated by, the two-way satellite-signal of each feed is divided into two-way by microstrip line two power splitters again after low noise amplifier amplifies, two feeds are told eight road signals altogether, eight road signals are respectively through band-pass filter, the frequency mixer mixing, after first order intermediate frequency amplifier amplifies, every road signal is divided into two-way by microstrip line two power splitters again, eight road signals are divided into ten six the tunnel, the intermediate-freuqncy signal of four kinds of different polarization and wave band mode, these four kinds of intermediate-freuqncy signals enter four four respectively and advance the two matrix selector switches that go out, it is become eight tunnel intermediate-freuqncy signals, eight tunnel intermediate-freuqncy signals are advanced a DiSEqC(Digital satellite Equipment Control who outes through four the tunnel two again: the digital satellite device control protocol) switch is selected, produce four tunnel output signals, after second level intermediate frequency amplifier amplifies, be connected on the output interface, carry out multichannel and export simultaneously.
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
The present invention a kind ofly can receive the double star signal simultaneously, and carries out the tuners of four tunnel outputs.With two commonly used satellites of being separated by about 4.3 degree, namely ASTRA 19.2 degree Ost and ASTRA 23.5 degree Ost are that example is specifically described below, below are that example describes with these two satellites all.
See also shown in Figure 1, in the present embodiment, two feeds 01 are installed on the satellite tuner shell, 02, the centre distance of feed 01 and feed 02 is 4.3CM, also is provided with four output interfaces on the shell, can carry out multichannel output simultaneously, signal processing circuit is installed in the shell, carries out satellite-signal and handle.
Described satellite tuner mainly is arranged between parabolic antenna and the digital satellite receiver, tuner in the present embodiment is for receiving ASTRA 19.2 degree Ost and ASTRA 23.5 two of Ost of the degree 4.3 degree left and right sides linear polarization direct broadcasting satellites of being separated by on the parabolic antenna that is of a size of 60cm-80cm at simultaneously, concrete signal processing circuit is: it is 10.7-12.75GHz linear polarization satellite-signal that two-way feed 01,02 is respectively applied to receive the frequency of sending from 13 degree satellite HOTBIRD of parabolic antenna reflection and 19.2 degree satellite ASTRA.Because two satellites are separated by about 6 degree, receive calculating and practical application experience by system, generally with two feeds 01,02 centre distance is set at 6.3cm, can effectively accept the satellite-signal of ASTRA 19.2 degree Ost and ASTRA 23.5 degree Ost, wherein ASTRA 19.2 degree Ost satellite-signals enter feed 01, and ASTRA 23.5 degree Ost satellite-signals enter feed 02.Two groups of satellite-signals enter feed 01 respectively, feed 02, the satellite-signal that feed 01 and feed 02 receives converts horizontal line polarized signal (HLP:HORIZONTAL LINEAR POLARIZATION) and vertical line polarized signal (VLP:VERTICAL LINEAR POLARIZATION) to and is transferred to polarization probe (omission is not drawn among the figure) by waveguide pipe and is coupled, four tunnel signal after coupling are sent to low noise amplifier 11 respectively, low noise amplifier 12, low noise amplifier 13, carrying out signal amplification and low noise in the low noise amplifier 14 handles, wherein low noise amplifier 11 amplifies the perpendicular polarization signal of ASTRA 19.2 degree Ost satellites, low noise amplifier 12 amplifies the horizontal polarization signal of ASTRA 19.2 degree Ost satellites, low noise amplifier 13 amplifies the perpendicular polarization signal of ASTRA 23.5 degree Ost satellites, and low noise amplifier 14 amplifies the horizontal polarization signal of ASTRA 23.5 degree Ost satellites.In the present embodiment, low noise amplifier 11, low noise amplifier 12, low noise amplifier 13, low noise amplifier 14 are and adopt three grades of low noise amplifiers that are connected in series to form, and the amplifier model is NE4210S01, NE3503S01, MGF4934.Satellite polarized signal after No. four low noise amplifiers amplify is imported four road microstrip lines, two power splitters respectively, be microstrip line two power splitters 21, microstrip line two power splitters 22, microstrip line two power splitters 23, microstrip line two power splitters 24, respectively the signal of each self-corresponding different polarization is divided into two-way by microstrip line two power splitters, is about to four road signals and is divided into eight road signals.Every road signal is carried out filtering by a band pass filter and is handled, it is band pass filter 31, band pass filter 32, band pass filter 33, band pass filter 34, band pass filter 35, band pass filter 36, band pass filter 37, band pass filter 38 is handled eight road signals that four road microstrip lines, two power splitters produce respectively, mainly provide the mixing interface level and the inband flatness that meet subsequent request, reduce the combination frequency that follow-up mixing produces, to play the effect that mirror image disturbed and guaranteed spectral purity that suppresses.Band pass filter 31 in the present embodiment, band pass filter 33, band pass filter 35, band pass filter 37 is the low band band pass filter of 10.7-11.7GHz for frequency band, band pass filter 31 is handled corresponding perpendicular polarization signal with band pass filter 35, and band pass filter 33 is handled corresponding horizontal polarization signal with band pass filter 37; Band pass filter 32, band pass filter 34, band pass filter 36, band pass filter 38 is the high band band pass filter of 11.7-12.75GHz for frequency band, band pass filter 32 is handled corresponding perpendicular polarization signal with band pass filter 36, and band pass filter 34 is handled corresponding horizontal polarization signal with band pass filter 38.Divide V/L(VERTICAL/LOW BAND through the signal after the band pass filter processing according to different polarization and wave band mode: perpendicular polarization/low band, below all represent with V/L), V/H(VERTICAL/HIGH BAND: perpendicular polarization/high band, below all represent with V/H), H/L(HORIZONTAL/LOW BAND: horizontal polarization/low band, below all represent with H/L) and H/H(HORIZONTAL/HIGH BAND: horizontal polarization/high band, below all represent with H/H) four kinds of satellite-signals.Import No. eight frequency mixers respectively through the output signal after eight tunnel band-pass filter, it is frequency mixer 41, frequency mixer 42, frequency mixer 43, frequency mixer 44, frequency mixer 45, frequency mixer 46, frequency mixer 47, with local oscillator 61, the signal that local oscillator 62 produces carries out the corresponding intermediate-freuqncy signal that produces eight tunnel different polarization of Frequency mixing processing in the frequency mixer 48.
In the present embodiment, be specially: 1) frequency is that the signal that produces of the local oscillator 61 of 9.75GHz is through microstrip line two power splitters 51, microstrip line two power splitters 52 are distributed in frequency mixer 41 respectively, frequency mixer 42, frequency mixer 43, frequency mixer 44 places are to low band band pass filter 31, band pass filter 33, band pass filter 35, the output signal of band pass filter 37 is carried out Frequency mixing processing, produces the intermediate-freuqncy signal of the relative low band of 950-1950MHz.Wherein frequency mixer 41 produces the V/L signal that ASTRA 19.2 degree Ost satellites are carried, frequency mixer 42 produces the H/L signal that ASTRA 19.2 degree Ost satellites are carried, frequency mixer 43 produces the V/L signal that ASTRA 23.5 degree Ost satellites are carried, and frequency mixer 44 produces the H/L signal that ASTRA 23.5 degree Ost satellites are carried.
2) frequency is that the signal that produces of the local oscillator 62 of 10.6GHz is through microstrip line two power splitters 53, microstrip line two power splitters 54 are distributed in frequency mixer 45 respectively, frequency mixer 46, frequency mixer 47, frequency mixer 48 places are to high band band pass filter 32, band pass filter 34, band pass filter 36, the output signal of band pass filter 38 is carried out Frequency mixing processing, produces the intermediate-freuqncy signal of the relative high band of 1100-2150MHz.Wherein frequency mixer 45 produces the V/H signal that ASTRA 19.2 degree Ost satellites are carried, frequency mixer 46 produces the H/H signal that ASTRA 19.2 degree Ost satellites are carried, frequency mixer 47 produces the V/H signal that ASTRA 23.5 degree Ost satellites are carried, and frequency mixer 48 produces the H/H signal that ASTRA 23.5 degree Ost satellites are carried.
In the present embodiment, the frequency mixer model is ALPHA7621, and local oscillator is by NE5508S01 or PHILPS424F and positive source 9.5GHz, and the DRO of 10.45GHz forms.
Pass through first order intermediate frequency amplifier respectively by eight tunnel intermediate-freuqncy signals that frequency mixer produces, it is first order intermediate frequency amplifier 71, first order intermediate frequency amplifier 72, first order intermediate frequency amplifier 73, first order intermediate frequency amplifier 74, first order intermediate frequency amplifier 75, first order intermediate frequency amplifier 76, first order intermediate frequency amplifier 77, first order intermediate frequency amplifier 78 carry out signal and amplify and level compensation.Wherein, first order intermediate frequency amplifier 71, first order intermediate frequency amplifier 72, first order intermediate frequency amplifier 75, first order intermediate frequency amplifier 76 amplify the V/L that 13 degree HOTBIRD satellites are carried, H/L, V/H, H/H signal respectively; First order intermediate frequency amplifier 73, first order intermediate frequency amplifier 74, first order intermediate frequency amplifier 77, first order intermediate frequency amplifier 78 amplifies the V/L that 19.2 degree ASTRA satellites are carried respectively, H/L, V/H, H/H signal, in the present embodiment, the concrete model that first order intermediate frequency amplifier is selected for use is PHILIPS2712.Eight road signals are more respectively through microstrip line two power splitters after first order intermediate frequency amplifier amplifies processing, be microstrip line two power splitters 81, microstrip line two power splitters 82, microstrip line two power splitters 83, microstrip line two power splitters 84, microstrip line two power splitters 85, microstrip line two power splitters 86, microstrip line two power splitters 87, microstrip line two power splitters 88 distribute becomes ten six tunnel intermediate-freuqncy signals, this ten six tunnel intermediate-freuqncy signal is divided V/L according to different polarization and wave band mode, V/H, four kinds of satellite intermediate-freuqncy signals of H/L and H/H, these four kinds of satellite-signals totally ten six tunnel, respectively with one road V/L, H/L, V/H, H/H signal are that one group of all band signal enters four the tunnel four and advances the two matrix selector switches that go out, it is matrix selector switch 91, matrix selector switch 92, matrix selector switch 93 is in the matrix selector switch 94, namely be in four inputs of each matrix selector switch V/L to be arranged all, H/L, V/H, the H/H signal each one the tunnel, four 13V/18V that the matrix selector switch is carried through cable by digital satellite receiver, the control signal of 0K/22K is controlled.Wherein the matrix selector switch 91, the all band signal of 93 couples of ASTRA of matrix selector switch, 19.2 degree Ost satellite correspondences is controlled, exporting four the tunnel altogether can select arbitrarily and separate work intermediate-freuqncy signal, matrix selector switch 92, the all band signal of 94 couples of ASTRA of matrix selector switch, 23.5 degree Ost satellite correspondences is controlled, and exports four the tunnel altogether and can select arbitrarily and separate work intermediate-freuqncy signal.In the present embodiment.Four advance the two matrix selector switches that go out, and model is SKY13272.Ten six road signals produce eight tunnel intermediate-freuqncy signals behind the matrix selector switch (each matrix selector switch produces two-way, four road matrix selector switch common properties give birth to eight the tunnel) respectively through after connect four the tunnel two to advance a DiSEqC(who outes be Digital satellite Equipment Control: the digital satellite device control protocol) switch is selected, DiSEqC switch 1011, DiSEqC switch 1012, DiSEqC switch 1013, the DiSEqC1.0 instruction that DiSEqC switch 1014 is carried through cable by digital satellite receiver is controlled, each DiSEqC switch has one group of all band signal of ASTRA 19.2 degree Ost satellite correspondences and one group of all band signal two-way of ASTRA 23.5 degree Ost satellite correspondences to enter, by the DiSEqC1.0 Instruction Selection wherein any one tunnel intermediate-freuqncy signal in a group export.In the present embodiment, DiSEqC switch major function is exactly the input signal with two-way, is mixed into one road signal output, advances one and goes out switch so be called two.That selects for use two advances one and goes out the DiSEqC switch and be provided with DiSEqC A and two kinds of patterns of DiSEqC B, establish control program acquiescence DiSEqC A control reception feed 01 in general and namely receive ASTRA 19.2 degree Ost satellite-signals, DiSEqC B control receives feed 02 and namely receives ASTRA 23.5 degree Ost satellite-signals; In some receiving area if will carry out phase feedback sources control receives, only need notice DiSEqC switch production firm will in establish that default logic is anti-phase to get final product.By four tunnel intermediate-freuqncy signals of DiSEqC switch output import respectively one the second season intermediate frequency amplifier, it is second level intermediate frequency amplifier 1111, second level intermediate frequency amplifier 1112, second level intermediate frequency amplifier 1113, second level intermediate frequency amplifier 1114 is to advance an intermediate-freuqncy signal that outes the selection of DiSEqC switch with two to carry out signal amplification and level compensation, satellite-signal arrives four output interfaces of the present invention after amplifying, be connected to four digital satellite receivers through cable and just can arrive user side.In the present embodiment, the model that second level intermediate frequency amplifier is selected for use is PHILIPS 2709.
The present invention has simplified the assembling of system, with minimum components and parts, minimum cost is high-quality in assurance, under the high performance prerequisite direct broadcasting satellite high-frequency signal is converted to intermediate-freuqncy signal and carries out the digital satellite receiver reception, especially the live signal with two satellites only receives with a parabolic antenna, and four ports output is simultaneously satisfied four users and simultaneously two satellite-signal audiovisual is received with a cable, receives many output solutions for consumers in general bring simpler double star.
Above content is the detailed description of the present invention being done in conjunction with concrete preferred implementation, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, aspect circuit to its framework change just can derive from single output, two output, four output series of products; As long as make some simple deduction or replace, all should be considered as belonging to scope of patent protection of the present invention.
Claims (7)
1. satellite tuner, it is characterized in that, comprise shell, be arranged on two feeds and the output interfaces on the shell and in the enclosure signal processing circuit is set, described signal processing circuit and each feed are connected with the polarization probe that two-way carries out perpendicular polarization and horizontal polarization coupling respectively, every road polarization probe is connected with No. one low noise amplifier respectively, be connected with first order microstrip line two power splitters in the output of each road low noise amplifier four road satellite-signals are divided into eight the tunnel, eight road signals are respectively through band pass filter, frequency mixer, first order intermediate frequency amplifier and second level microstrip line two power splitter connect and are divided into ten six road signals and four kinds of different polarization and the intermediate-freuqncy signal of wave band mode, these four kinds of intermediate-freuqncy signals are advanced two matrixes that go out through four four respectively it are become eight tunnel intermediate-freuqncy signals, eight tunnel intermediate-freuqncy signals are advanced a digital satellite device control protocol switch that outes through four the tunnel two again and are selected, produce four tunnel output signals, after second level intermediate frequency amplifier amplifies, be connected on the output interface, carry out multichannel and export simultaneously.
2. satellite tuner as claimed in claim 1, it is characterized in that, described every road first order intermediate frequency amplifier output is connected with second level microstrip line two power splitters respectively, satellite-signal after the amplification of eight road intermediate frequencies is divided into ten six the tunnel, four second level microstrip line two power splitters that are connected with first feed output signal, two outputs of each second level microstrip line two power splitter are connected with the input of the first matrix selector switch and the 3rd matrix selector switch respectively, four second level microstrip line two power splitters that are connected with second feed output signal, two outputs of each second level microstrip line two power splitter are connected with the 4th matrix selector switch input with the second matrix selector switch respectively, the first matrix selector switch, the second matrix selector switch, the 3rd matrix selector switch and the 4th matrix selector switch are four and advance the two matrix selector switches that go out, two outputs of the first matrix selector switch are connected with the input of the first digital satellite device control protocol switch with the second digital satellite device control protocol switch respectively, two outputs of the second matrix selector switch are connected with another input of the first digital satellite device control protocol switch and the second digital satellite device control protocol switch respectively, two outputs of the 3rd matrix selector switch are connected with the input of the 3rd digital satellite device control protocol switch with the 4th digital satellite device control protocol switch respectively, two outputs of the 4th matrix selector switch are connected with another input of the 3rd digital satellite device control protocol switch and the 4th digital satellite device control protocol switch respectively, the output of each digital satellite device control protocol switch is connected with a second level intermediate frequency amplifier respectively, and each second level intermediate frequency amplifier is connected with an output interface.
3. satellite tuner as claimed in claim 2 is characterized in that, described feed adopts integrated die sinking die cast 4.3 degree feeds, and two feed central point distances are 4.3CM.
4. satellite tuner as claimed in claim 3, it is characterized in that the first digital satellite device control protocol switch, the second digital satellite device control protocol switch, the 3rd digital satellite device control protocol switch and the 4th digital satellite device control protocol switch are two and advance a digital satellite device control protocol switch that outes.
5. satellite tuner as claimed in claim 2 is characterized in that, described low noise amplifier adopts three grades of low noise amplifiers that are connected in series to form.
6. satellite tuner as claimed in claim 2 is characterized in that, described digital satellite device control protocol switch is provided with two kinds of patterns, and is a kind of for the control program acquiescence receives the first feed satellite-signal, a kind of for controlling the reception second feed satellite-signal.
7. one kind based on KU band satellite audiovisual receiving system, it is characterized in that, comprises being arranged between parabolic antenna and the digital satellite receiver as each described satellite tuner of claim 1-6.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105430356A (en) * | 2015-12-24 | 2016-03-23 | 华讯方舟科技（湖北）有限公司 | Four-output microwave frequency conversion circuit and microwave frequency converter |
| CN113746492A (en) * | 2021-09-10 | 2021-12-03 | 北京微纳星空科技有限公司 | Radio frequency receiving channel equipment applied to satellite electromagnetic environment monitoring |
-
2013
- 2013-03-20 CN CN 201310089873 patent/CN103269428A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105430356A (en) * | 2015-12-24 | 2016-03-23 | 华讯方舟科技（湖北）有限公司 | Four-output microwave frequency conversion circuit and microwave frequency converter |
| CN105430356B (en) * | 2015-12-24 | 2018-08-24 | 华讯方舟科技（湖北）有限公司 | Four tunnels of one kind output microwave frequency changer circuit and microwave converter |
| CN113746492A (en) * | 2021-09-10 | 2021-12-03 | 北京微纳星空科技有限公司 | Radio frequency receiving channel equipment applied to satellite electromagnetic environment monitoring |
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