CN104469215A - C-waveband tuner sharing two-level amplifier - Google Patents
C-waveband tuner sharing two-level amplifier Download PDFInfo
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- CN104469215A CN104469215A CN201510000841.7A CN201510000841A CN104469215A CN 104469215 A CN104469215 A CN 104469215A CN 201510000841 A CN201510000841 A CN 201510000841A CN 104469215 A CN104469215 A CN 104469215A
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Abstract
The invention discloses a C-waveband tuner sharing a two-level amplifier. The C-waveband tuner comprises a horizontal probe, a vertical probe, a first triode for receiving horizontal polarization signals transmitted by the horizontal probe, a second triode for receiving vertical polarization signals transmitted by the vertical probe, the two-level amplifier for receiving first-level amplification signals output by the first triode and the second triode and re-amplifying the first-level amplification signals, a band-pass filter for conducting frequency selection on second-level amplification signals, a local oscillator circuit for generating the local oscillator frequency, a frequency mixing circuit for receiving target frequency band signals output by the bad-pass filter and mixing the target frequency band signals and the local oscillator frequency output by the local oscillator circuit, and a detection device for monitoring the working state of the horizontal probe or the vertical probe and outputting voltage signals so as to control the frequency mixing circuit to adjust the frequency adjusting mode. The C-waveband tuner can receive the horizontal polarization signals and the vertical polarization signals.
Description
Technical field
The present invention relates to a kind of C-band tuner of shared two-stage amplifier, belong to satellite signal receiving device fabrication manufacturing technology field.
Background technology
General satellite television receiving system mainly comprises: antenna, feed, low noise block downconverter, cable, clamped nipple, satellite receiver, television receiver, wherein low noise block downconverter is also referred to as tuner, is by low noise amplifier and the integrated assembly of low-converter.The satellite downlink microwave signal received due to the ground-plane antenna in satellite television receiving system has been very faint through the long-distance transmissions of about about 40000 km, and usual antenna feed outgoing carrier power is about-90 dBmW; If feeder loss is 0.5 dB, then low noise amplifier input carrier power is-90.5 dBmW; The loss of the first frequency converter and band pass filter is about 10 dB, and the gain of putting in first is about 30 dB; Like this, if low noise amplifier provides gain 40 dB ~ 50 dB, then low-converter output can export the signal of-30 dBmW ~-20 dBmW.It can thus be appreciated that the effect of satellite television low-converter is under the condition ensureing original signal mass parameter, and the signal of the satellite downlink frequency received is carried out low noise amplification and frequency conversion.
Chinese patent literature CN 203279020 U discloses a kind of C-band tuner, comprise feed, waveguide pipe, circuit board box, circuit board and joint, high frequency amplifying module, intermediate frequency output module, Voltage stabilizing module and the phase-locked module of crystal oscillator that circuit board is provided with control chip and is attached thereto; The satellite-signal that high frequency amplifying module receives is after control chip process, exported by intermediate frequency output module, control chip is used for satellite-signal to be converted to output signal, and the frequency compared before output signal exports between itself and reference-input signal and phase place difference, and produce by the phase-locked module of crystal oscillator the local frequency matched described output signal is adjusted, until the frequency of described output signal is synchronously consistent with reference-input signal with phase place, then output signal is transferred to intermediate frequency output module and is exported by intermediate frequency output module.The deficiency that above-mentioned technology exists is only to be provided with a probe, be merely able to receive horizontal polarization signals or perpendicular polarization signal, when application scenario requires that can either receive horizontal polarization signals can receive again perpendicular polarization signal time, two tuners can only be adopted, not only install and change loaded down with trivial details, and use cost is higher.
Summary of the invention
The present invention for the deficiency that prior art exists, provides a kind of C-band tuner of shared two-stage amplifier, can either receive horizontal polarization signals and can receive perpendicular polarization signal again, meet actual operation requirements just.
For solving the problem, the technical solution used in the present invention is as follows:
A C-band tuner for shared two-stage amplifier, comprising:
For receiving the horizontal probe of horizontal polarization signals and the Vertrical probe for receiving perpendicular polarization signal;
For receiving the horizontal polarization signals of described horizontal probe transmission, and the first triode of low noise amplification and the perpendicular polarization signal for receiving the transmission of described Vertrical probe are carried out to horizontal polarization signals, and perpendicular polarization signal is carried out to the second triode of low noise amplification;
For receiving the one-level amplifying signal of described first triode and described second triode output, and to the two-stage amplifier that one-level amplifying signal amplifies again;
Secondary amplifying signal for exporting described two-stage amplifier carries out the band pass filter of He Ne laser;
For generation of the local oscillation circuit of local frequency;
For receiving the signal of the target frequency bands that described band pass filter exports, and the local frequency that the signal of target frequency bands and described local oscillation circuit export is carried out the mixting circuit of mixing;
For monitor described horizontal probe or described Vertrical probe operating state and output voltage signal to control the detection means of mixting circuit adjustment mixing schemes.
As the improvement of technique scheme, described local oscillation circuit comprises phase-locked loop resonator, described phase-locked loop and described mixting circuit are integrated in integrated circuit (IC) chip, and the power amplification circuit be also provided with in described integrated circuit (IC) chip for amplifying mixer output signal, described detection means is voltage stabilizing didoe, and the positive pole of described voltage stabilizing didoe connects described horizontal probe, the negative pole of described voltage stabilizing didoe connects described integrated circuit (IC) chip.Particularly, described integrated circuit (IC) chip is RDA3570 chip.
Compared with prior art, implementation result of the present invention is as follows in the present invention:
The C-band tuner of a kind of shared two-stage amplifier of the present invention, have employed dual polarization probe and the structure of shared two-stage amplifier, not only make the increase of the C-band tuner scope of application, function enhancing, horizontal polarization signals can either be received and can receive perpendicular polarization signal again, and relative to the C-band tuner of conventional bipolar probe, there is the advantage that structure simplifies; And select integrated circuit (IC) chip by integrated for the functional module in C-band tuner, thus be conducive to improving further C-band tuner production efficiency, reduce manufacturing cost and improve the quality of products.
Accompanying drawing explanation
Fig. 1 is the C-band tuner principle schematic of a kind of shared two-stage amplifier of the present invention;
Fig. 2 is the C-band tuner particular circuit configurations schematic diagram of a kind of shared two-stage amplifier of the present invention.
Embodiment
Below in conjunction with specific embodiments content of the present invention is described.
As depicted in figs. 1 and 2, be the C-band tuner structure schematic diagram of a kind of shared two-stage amplifier of the present invention.The C-band tuner of a kind of shared two-stage amplifier of the present invention, comprising: for receiving the horizontal probe (T1) of horizontal polarization signals and the Vertrical probe (T2) for receiving perpendicular polarization signal; For receiving the horizontal polarization signals that described horizontal probe (T1) is transmitted, and to horizontal polarization signals carry out low noise amplification the first triode (Q1) and for receiving the perpendicular polarization signal that described Vertrical probe (T2) transmits, and second triode (Q2) of low noise amplification is carried out to perpendicular polarization signal; For receiving the one-level amplifying signal that described first triode (Q1) and described second triode (Q2) export, and to the two-stage amplifier (Q3) that one-level amplifying signal amplifies again; Secondary amplifying signal for exporting described two-stage amplifier (Q3) carries out the band pass filter (L) of He Ne laser; For generation of the local oscillation circuit of local frequency; For receiving the signal of the target frequency bands that described band pass filter (L) exports, and the local frequency that the signal of target frequency bands and described local oscillation circuit export is carried out the mixting circuit of mixing; For monitor described horizontal probe (T1) or described Vertrical probe (T2) operating state and output voltage signal to control the detection means (D) of mixting circuit adjustment mixing schemes.
Particularly, described local oscillation circuit comprises phase-locked loop resonator (Y), described phase-locked loop and described mixting circuit are integrated in integrated circuit (IC) chip (IC), and the power amplification circuit be also provided with in described integrated circuit (IC) chip (IC) for amplifying mixer output signal, described detection means (D) is voltage stabilizing didoe, and the positive pole of described voltage stabilizing didoe connects described horizontal probe (T1), the negative pole of described voltage stabilizing didoe connects described integrated circuit (IC) chip (IC).Described integrated circuit (IC) chip (IC) can be RDA3570 chip.
The horizontal polarization signals received is delivered to the one-level amplification that the second triode Q2 carries out signal by horizontal probe T1, the secondary amplification of signal is carried out again by two-stage amplifier Q3, then integrated circuit die I C is inputed to by the signal of band pass filter L select target frequency range, for phase-locked, mixing the specific product model of the integrated circuit die I C of amplifying power can be RDA3570, integrated circuit die I C is connected with crystal resonator Y simultaneously, then intermediate-freuqncy signal is exported to receiver or other Signal reception treatment facility by intermediate-freuqncy signal output M, thus complete the collection of horizontal polarization signals, the perpendicular polarization signal received is delivered to the one-level amplification that the first triode Q1 carries out signal by Vertrical probe T2, the secondary amplification of signal is carried out again by two-stage amplifier Q3, then integrated circuit die I C is inputed to by the signal of band pass filter L select target frequency range, then export intermediate-freuqncy signal to receiver or other Signal reception treatment facility by intermediate-freuqncy signal output M, thus complete the collection of perpendicular polarization signal.
The selection switching of horizontal polarization signals and perpendicular polarization signal is controlled by receiver, receiver exports the cut-ff voltage higher than voltage stabilizing didoe D to voltage stabilizing didoe D, make voltage stabilizing didoe D conducting, thus make integrated circuit die I C export bias voltage to the second triode Q2, now just can receive horizontal polarization signals; Receiver exports the cut-ff voltage lower than voltage stabilizing didoe D to voltage stabilizing didoe D, and voltage stabilizing didoe D is disconnected, thus makes integrated circuit die I C export bias voltage to the first triode Q1, now just can receive perpendicular polarization signal.
Preferably, one can be arranged for regulating the microstrip line W of impedance between one stage signal amplifier second triode Q2 and the first triode Q1, to reduce the noise factor of the finned tuner total system of a kind of C-band described in the present embodiment.Particularly, supply power voltage is by inputing to Circuits System from feeder ear V after voltage-stabiliser tube regulation voltage.Remaining resistance R1 ~ R11, electric capacity C1 ~ C12 all for regulating circuit performance according to actual needs, provide judgement voltage.
Above content is detailed description made for the present invention in conjunction with specific embodiments, can not assert that the present invention specifically implements to be only limitted to these explanations.For those skilled in the art, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to the scope of protection of the invention.
Claims (3)
1. a C-band tuner for shared two-stage amplifier, is characterized in that, comprising:
For receiving the horizontal probe (T1) of horizontal polarization signals and the Vertrical probe (T2) for receiving perpendicular polarization signal;
For receiving the horizontal polarization signals that described horizontal probe (T1) is transmitted, and to horizontal polarization signals carry out low noise amplification the first triode (Q1) and for receiving the perpendicular polarization signal that described Vertrical probe (T2) transmits, and second triode (Q2) of low noise amplification is carried out to perpendicular polarization signal;
For receiving the one-level amplifying signal that described first triode (Q1) and described second triode (Q2) export, and to the two-stage amplifier (Q3) that one-level amplifying signal amplifies again;
Secondary amplifying signal for exporting described two-stage amplifier (Q3) carries out the band pass filter (L) of He Ne laser;
For generation of the local oscillation circuit of local frequency;
For receiving the signal of the target frequency bands that described band pass filter (L) exports, and the local frequency that the signal of target frequency bands and described local oscillation circuit export is carried out the mixting circuit of mixing;
For monitor described horizontal probe (T1) or described Vertrical probe (T2) operating state and output voltage signal to control the detection means (D) of mixting circuit adjustment mixing schemes.
2. the C-band tuner of a kind of shared two-stage amplifier as claimed in claim 1, it is characterized in that, described local oscillation circuit comprises phase-locked loop resonator (Y), described phase-locked loop and described mixting circuit are integrated in integrated circuit (IC) chip (IC), and the power amplification circuit be also provided with in described integrated circuit (IC) chip (IC) for amplifying mixer output signal, described detection means (D) is voltage stabilizing didoe, and the positive pole of described voltage stabilizing didoe connects described horizontal probe (T1), the negative pole of described voltage stabilizing didoe connects described integrated circuit (IC) chip (IC).
3. the C-band tuner of a kind of shared two-stage amplifier as claimed in claim 1, is characterized in that, described integrated circuit (IC) chip (IC) is RDA3570 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510000841.7A CN104469215A (en) | 2015-01-04 | 2015-01-04 | C-waveband tuner sharing two-level amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510000841.7A CN104469215A (en) | 2015-01-04 | 2015-01-04 | C-waveband tuner sharing two-level amplifier |
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| CN104469215A true CN104469215A (en) | 2015-03-25 |
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| CN201510000841.7A Pending CN104469215A (en) | 2015-01-04 | 2015-01-04 | C-waveband tuner sharing two-level amplifier |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106656053A (en) * | 2016-11-04 | 2017-05-10 | 华讯方舟科技（湖北）有限公司 | Ku-band frequency conversion circuit and frequency converter |
| CN109120870A (en) * | 2018-10-19 | 2019-01-01 | 隔空微电子（广州）有限公司 | Highly integrated Ku band satellite television high frequency header structure |
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| CN103973230A (en) * | 2014-04-28 | 2014-08-06 | 珠海市肯普电子科技有限公司 | Dual-polarization Twin PLL integrated circuit dual-output frequency demultiplier |
| CN204013923U (en) * | 2014-06-06 | 2014-12-10 | 四川省视频电子有限责任公司 | A kind of for receiving the integrated low-converter of wideband direct broadcast satellite TV signal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101282439A (en) * | 2007-12-29 | 2008-10-08 | 青岛海信电器股份有限公司 | Power supply system for antenna |
| US20100130148A1 (en) * | 2008-11-27 | 2010-05-27 | Sony Corporation | Tuner module |
| CN102064520A (en) * | 2010-04-22 | 2011-05-18 | 杭州祺来电子有限公司 | Lightning protection automatic switch for satellite television receiver |
| CN202818466U (en) * | 2012-08-24 | 2013-03-20 | 张金国 | Single output high frequency head for receiving satellite TV signal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106656053A (en) * | 2016-11-04 | 2017-05-10 | 华讯方舟科技（湖北）有限公司 | Ku-band frequency conversion circuit and frequency converter |
| CN109120870A (en) * | 2018-10-19 | 2019-01-01 | 隔空微电子（广州）有限公司 | Highly integrated Ku band satellite television high frequency header structure |
| CN109120870B (en) * | 2018-10-19 | 2021-03-19 | 隔空微电子（广州）有限公司 | High-frequency head structure of high-integration Ku waveband satellite television |
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Application publication date: 20150325 |