CN203722753U - KU-waveband dual-polarized dual output high frequency tuner - Google Patents
KU-waveband dual-polarized dual output high frequency tuner Download PDFInfo
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- CN203722753U CN203722753U CN201420043049.0U CN201420043049U CN203722753U CN 203722753 U CN203722753 U CN 203722753U CN 201420043049 U CN201420043049 U CN 201420043049U CN 203722753 U CN203722753 U CN 203722753U
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Abstract
The utility model discloses a KU-waveband dual-polarized dual output high frequency tuner, which comprises a feed source, a circuit board box provided with a built-in circuit board, two connectors arranged on the circuit board box, and a waveguide which is used for transmitting signals and connected between the feed source and the circuit board box; and the circuit board box is further provided with a circuit board box cover; and the circuit board is provided with a first-stage high-frequency amplification circuit, a second-stage high-frequency amplification circuit, a filtering circuit, a crystal oscillator circuit, a variable frequency output circuit, a control circuit and a three-terminal voltage stabilizing circuit and the like. According to the KU-waveband dual-polarized dual output high frequency tuner, a single 25MHz crystal oscillator and a phase-locked circuit combined by two variable frequency IC are utilizes to automatically realize that output signals are synchronized and kept consistent with reference-input signals in frequency and phase, the performance is stable, and the circuit board is designed into a KU-waveband dual output high frequency tuner composed of one circuit board by utilizing the advantage of simplifying the circuit board through the highly-integrated chips.
Description
Technical field
The utility model relates to a kind of receiving system of KU waveband radio frequency satellite-signal, particularly a kind of for receiving the KU band dual polarization dual output tuner of digital satellite television signal.
Background technology
Tuner is a kind of digital satellite television signal receiving device, it can carry out channel selection, signal amplifies and frequency-conversion processing, the TV signal of final stable output, this wherein has several links very important, make the output signal of tuner in frequency and phase place, synchronize with reference signal and be consistent, conventionally be all the control circuit at circuit board, the frequency of oscillation circuit of triode and DR composition completes jointly, its concrete operations are: need in use manually to go the spacing of the tuning screw of manual adjustments to change the local oscillation signal frequency that frequency of oscillation circuit produces, thereby then go signal frequency and the phase place of adjusting output to reach the object to output signal locking by control circuit control local frequency, the local frequency producing due to the frequency of oscillation circuit of KU wave band is very high, easily be subject to the variation of ambient temperature, the assembly of tuner is expanded with heat and contract with cold, cause the spacing between tuning screw and DR to change, and then the local frequency of change frequency of oscillation circuit generation, make its frequency shift (FS) cannot allow the output signal of tuner and reference-input signal be consistent, final normal work and the useful life that affects tuner.
In addition, the tuner of KU band dual output is at present to be connected and to be assembled by multiple connecting needles by polylith circuit board, has complex circuit, polarization isolation weak effect, produces the defects such as loaded down with trivial details, cost of manufacture is high.
In view of this, the inventor studies this, develops specially a kind of KU band dual polarization dual output tuner, and this case produces thus.
Utility model content
The purpose of this utility model is to provide a kind of KU band dual polarization dual output tuner, adopting the crystal oscillator of an independent 25MHz and the phase lock circuitry of two frequency conversion IC combinations automatically to complete makes output signal consistent with reference-input signal synchronization with in phase place in frequency, and stable performance, and the advantage of utilizing highly integrated chip that circuit board is simplified has become board design the KU band dual output high frequency tuner being made up of a circuit board.
To achieve these goals, solution of the present utility model is:
A kind of KU band dual polarization dual output tuner, comprise feed, internal circuit board circuit board box, be arranged on two joints on circuit board box, and be connected between described feed and described circuit board box, for the waveguide pipe of transmission of signal, on described circuit board box, be further provided with circuit board lid; Described circuit board is provided with one-level high-frequency amplifier circuit, secondary high-frequency amplifier circuit, filter circuit, crystal oscillator (crystal oscillator) circuit, frequency conversion output circuit, control circuit and three-terminal voltage-stabilizing circuit etc., wherein, three-terminal voltage-stabilizing circuit is connected with control circuit, control circuit is connected with one-level high-frequency amplifier circuit, secondary high-frequency amplifier circuit and frequency conversion output circuit simultaneously, filter circuit is connected between secondary high-frequency amplifier circuit and frequency conversion output circuit, and crystal oscillating circuit is connected with frequency conversion output circuit; Foregoing circuit comprises V circuit and H circuit, V circuit receives the radiofrequency signal of vertical antenna, through one-level high-frequency amplifier circuit and twice amplification of secondary high-frequency amplifier circuit, by being sent to frequency conversion output circuit after filter circuit filtering, after obtaining V road intermediate-freuqncy signal, the mixing of frequency conversion output circuit amplifies output again; In like manner, H circuit receives the radiofrequency signal of horizontal antenna, through one-level high-frequency amplifier circuit and twice amplification of secondary high-frequency amplifier circuit, then by being sent to frequency conversion output circuit after filter circuit filtering, after obtaining H road intermediate-freuqncy signal, the mixing of frequency conversion output circuit amplifies output; Above-mentioned frequency conversion output circuit adopts the frequency conversion chip that model is TFF1013.
As preferably, above-mentioned crystal oscillating circuit comprises 25MHz crystal oscillator, electric capacity, electric capacity, crystal oscillator one end connects the HB1 end of V line frequency conversion chip by series capacitance, other end series capacitance connects the HB2 end of frequency conversion chip, frequency conversion chip and crystal oscillating circuit composition mixing unit, regulates and local oscillation signal phase-locked and 2 frequency conversion chip generation local frequency 9.75GHz and 10.6GHz automatically by crystal oscillator.
As preferably, above-mentioned one-level high-frequency amplifier circuit comprises successively connected V field of line effect transistor, V line the first transistor; And connected H field of line effect transistor, H line the first transistor successively; The components and parts of above-mentioned V line and H line are separate.Described field-effect transistor adopts the field effect transistor that model is NEC3503, and described the first transistor adopts the field effect transistor that model is ON5087.
As preferably, above-mentioned secondary high-frequency amplifier circuit comprises two V line transistor secondses parallel with one another, and two H line transistor secondses parallel with one another, vertical signal is after one-level high-frequency amplifier circuit amplifies processing, be divided into two-way by power divider, again amplify processing through two V line transistor secondses in parallel respectively.
As preferably, above-mentioned control circuit adopts the control chip that model is LS3211, controls one-level high-frequency amplifier circuit and secondary high-frequency amplifier circuit and has stable voltage, ensures the stability of its work.
As preferably, above-mentioned three-terminal voltage-stabilizing circuit comprises the three-terminal voltage-stabilizing pipe that 2 models are UTC78M06, and be connected to 2 diodes of two blocks of three-terminal voltage-stabilizing pipes, two three-terminal voltage-stabilizing pipes are connected with control chip by after 2 diodes respectively, for control circuit provides 6V voltage, VIN1, VOUT1, VIN2, the VOUT2 end of three-terminal voltage-stabilizing pipe are equipped with capacity earth and carry out filtering, make direct current purer, make control chip operation more stable.
Above-mentioned KU band dual polarization dual output tuner operation principle: because tuner described in the utility model belongs to dual polarization, dual output tuner, offering two users uses, be independent of each other for signal receives, two-way intermediate-freuqncy signal output OUT1 and OUT2 must have two polarization output signals of vertical and horizontal.Intermediate frequency output OUT1 specific works principle is such: feed amplifies processing by waveguide pipe transmitting radio frequency signal to the V field of line effect transistor in one-level high-frequency amplifier circuit and secondary high-frequency amplifier circuit, V line the first transistor, V line transistor seconds after receiving satellite-signal, then by BPF1 filtering unit filters, required wave band (10.7GHz～12.75GHz) is sent to the mixing of frequency conversion output circuit, wherein local frequency is two local frequency 9.75GHz and the 10.6GHz being produced in conjunction with frequency conversion chip by 25MHz crystal oscillator Y.After finally processing by frequency conversion chip Frequency differential amplifying, obtain the intermediate-freuqncy signal output that frequency range is 950MHz～2150MHz, connect and send satellite receiver demodulation code to and work by output interface again, decode the most at last the vision signal come and audio signal transmission to television for play.In like manner, another road intermediate-freuqncy signal output OUT2 is by the H field of line effect transistor in one-level high-frequency amplifier circuit and secondary high-frequency amplifier circuit, after H line the first transistor and H line transistor seconds amplify processing to radiofrequency signal, send required wave band (10.7GHz～12.75GHz) mixing of to frequency conversion chip by BPF2 filtering unit filters, its local frequency is to produce 9.75GHz and 10.6GHz by 25MHz crystal oscillator Y in conjunction with frequency conversion chip, after finally processing by frequency conversion chip Frequency differential amplifying, obtain the intermediate-freuqncy signal output that frequency range is 950MHz～2150MHz, connect and send satellite receiver to by output interface again.
Compared with prior art, above-mentioned KU band dual polarization dual output tuner tool has the following advantages:
1) frequency and the phase place that adopt, separately a 25MHz crystal and two frequency conversion chips just can complete two-way output signal automatically adjust and lock, and do not need to go manually to regulate 9.75GHz and two frequencies of 10.6GHz;
2), adopt polylith integrated chip by complicated circuit integration, make circuit board be designed to a simple circuit board KU band dual output high frequency tuner by the KU band dual output high frequency tuner that needs in the early time to form with polylith circuit board, thereby significantly improved production efficiency and reduced manufacturing cost;
3) the mirror filter combination that, secondary high-frequency amplifier circuit adopts NXP ON5087 high-gain field effect transistor amplifier tube and forms by Numeric simulation design, solve to greatest extent the most troubling polarization in KU band dual output high frequency tuner and disturbed mutually problem, thereby made that properties of product power gain is high, noise factor is low, polarization isolation is effective, reliability is high.
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is the KU band dual polarization dual output tuner structure schematic diagram of the present embodiment;
Fig. 2 is the KU band dual polarization dual output high frequency tuner circuit functional-block diagram of the present embodiment;
Fig. 3 is the frequency conversion output circuit schematic diagram of the present embodiment;
Fig. 4 is the control circuit schematic diagram of the present embodiment.
Embodiment
As shown in Figure 1-2, a kind of KU band dual polarization dual output tuner, comprise feed 1, internal circuit board circuit board box 4, be arranged on two joints 3 on circuit board box 4, and be connected between described feed 1 and described circuit board box 4, for the waveguide pipe 2 of transmission of signal, on described circuit board box 4, be further provided with circuit board lid 5, described circuit board 4 is provided with one-level high-frequency amplifier circuit 41, secondary high-frequency amplifier circuit 42, filter circuit 43, crystal oscillator (crystal oscillator) circuit 44, frequency conversion output circuit 45, control circuit 46 and three-terminal voltage-stabilizing circuit 47 etc., foregoing circuit comprises V circuit and H circuit, because the descending microwave signal of satellite that antenna reception in satellite television receiving system arrives is very faint, for ensureing the quality of signal, the perpendicular polarization signal of satellite and horizontal polarization signal are divided into V circuit, two circuits of H circuit amplify processing to satellite downlink frequency respectively, then by selecting required frequency band signals to go out intermediate-freuqncy signal with local oscillation signal mixing difference frequency again with logical image frequency rejects trap, output signal sends satellite receiver to by cable and completes the work of demodulation code, final outputting video signal and audio signal are to television set.
In the present embodiment, above-mentioned one-level high-frequency amplifier circuit 41 comprises successively connected V field of line effect transistor Q1V, V line the first transistor Q2V; And connected H field of line effect transistor Q1H, H line the first transistor Q2H successively; The components and parts of above-mentioned V line and H line are separate.Above-mentioned secondary high-frequency amplifier circuit 42 comprises two V line transistor seconds Q3V1, Q3V2 parallel with one another, and two H line transistor seconds Q3H1, Q3H2 parallel with one another.V circuit is that the radiofrequency signal connection V field of line effect transistor Q1V being received by vertical antenna amplifies, then be connected in series coupling capacitance C7 and be connected to the first transistor Q2V and again amplify, then be divided into two paths of signals by power divider serial connection coupling capacitance C11, C12 and be connected to V line transistor seconds Q3V1, Q3V2 and carry out secondary low noise High frequency amplification and obtain V road signal.H circuit is that the radiofrequency signal connection H field of line effect transistor Q1H being received by horizontal antenna amplifies, then be connected in series coupling capacitance C8 and be connected to H line the first transistor Q2H and again amplify, then be divided into two paths of signals by power divider serial connection capacitive coupling C9, C10 and be connected to H line transistor seconds Q3H1, Q3H2 and carry out secondary low noise High frequency amplification and obtain H road signal.What above-mentioned field-effect transistor Q1V, Q1H adopted is that the NEC 3503 field effect transistor low noise amplifiers of NEC Corporation amplify the signal of feed feed-in, and what the first transistor Q2V, Q2H and transistor seconds Q3V1, Q3V2, Q3H1, Q3H2 adopted is NXP ON5087 high-gain field effect transistor amplifier tube.Therefore KU band dual output high frequency tuner power gain is high, noise factor is low, polarization isolation is effective.
In the present embodiment, described control circuit 46 mainly comprises control chip IC3, IC4, wherein control chip IC3 is connected with tetra-amplifiers of Q1V, Q2V, Q3V1, Q3H1 in high-frequency amplifier circuit, control chip IC4 is connected with Q1H, Q2H, Q3V2, tetra-amplifiers of Q3H2, the intermediate frequency output OUT1 of dual output tuner switches realization polarization selection by control circuit 46 to Q3V2 and Q3V1 voltage, and OUT2 switches to realize polarization by control circuit 46 to the voltage of Q3H2 and Q3H1 to select.Control chip IC3 in above-mentioned control circuit 46, IC4 model are LS3211, control one-level high-frequency amplifier circuit 41 and secondary high-frequency amplifier circuit 42 and have stable voltage, ensure the stability of its work.
As shown in Figure 3, in the present embodiment, it is the frequency conversion chip of TFF1013 that described frequency conversion output circuit 45 adopts model.Crystal oscillating circuit 44 comprises 25MHz crystal oscillator Y, capacitor C 1, capacitor C 2, and crystal oscillator Y one end connects the HB1 end of V line frequency conversion chip U1 by series capacitance C1, and other end series capacitance C2 connects the HB2 end of H line frequency conversion chip U2.Above-mentioned frequency conversion chip U1, U2 and crystal oscillating circuit 45 form mixing unit, automatically regulate and local oscillation signal phase-locked and 2 frequency conversion chip U1, U2 generation local frequency 9.75GHz and 10.6GHz by crystal oscillator Y.The frequency and the phase place that adopt separately a 25MHz crystal and two frequency conversion chip U1, U2 just can complete two-way output signal automatically adjust and lock, and do not need to go manually to regulate 9.75GHz and two frequencies of 10.6GHz.
As shown in Figure 4, in the present embodiment, described three-terminal voltage-stabilizing circuit 47 comprises three-terminal voltage-stabilizing pipe IC5, the IC6 that 2 models are UTC78M06, and be connected to 2 diode D1, the D2 of two three-terminal voltage-stabilizing pipe IC5, IC6, two three-terminal voltage-stabilizing pipe IC5, IC6 are connected with control chip IC3, IC4 by D1, D2 after 2 diodes respectively, for control circuit 46 provides 6V voltage, VIN1, VOUT1, VIN2, the VOUT2 end of three-terminal voltage-stabilizing pipe IC5, IC6 are equipped with capacity earth and carry out filtering, make direct current purer, make control chip operation more stable.
BPF1, BPF2 in described filter circuit 43 is digital simulation emulation mirror image inhibition zone bandpass filter out, the front end of BPF1 filter connects Q3V1, the Q3H1 of secondary high-frequency amplifier circuit 42, rear end connects frequency conversion chip U1, Q3V2, the Q3H2 of the front connection secondary high-frequency amplifier circuit 42 of BPF2 filter, rear end connects frequency conversion chip U2.
Because tuner described in the utility model belongs to dual polarization dual output tuner, offer two users and use, for receiving, signal is independent of each other, and two-way intermediate-freuqncy signal output OUT1 and OUT2 must have two polarization output signals of vertical and horizontal.Intermediate frequency output OUT1 specific works principle is such: feed 1 receives after satellite-signal by waveguide pipe 2 transmitting radio frequency signals and amplifies processing to 42 Q1V, Q2V, Q3V1, Q1H, Q2H, Q3H1 in one-level high-frequency amplifier circuit 41 and secondary high-frequency amplifier circuit, then by the filtering of BPF1 filter circuit, required wave band (10.7GHz～12.75GHz) is sent to frequency conversion chip U1 mixing, wherein local frequency is two local frequency 9.75GHz and the 10.6GHz being produced in conjunction with frequency conversion chip U1 by 25MHz crystal oscillator Y.After finally processing by frequency conversion chip U1 Frequency differential amplifying, obtain the intermediate-freuqncy signal output that frequency range is 950MHz～2150MHz, connect and send satellite receiver demodulation code to and work by output interface again, decode the most at last the vision signal come and audio signal transmission to television for play.In like manner, another road intermediate-freuqncy signal output OUT2 is by the Q1H in one-level high-frequency amplifier circuit 41 and secondary high-frequency amplifier circuit 42, Q2H, Q3H1, after Q3H2 amplifies processing to radiofrequency signal, send required wave band (10.7GHz～12.75GHz) to frequency conversion chip U2 mixing by BPF2 filtering filtering, its local frequency is to produce 9.75GHz and 10.6GHz by 25MHz crystal oscillator Y in conjunction with frequency conversion chip U2, after finally processing by frequency conversion chip U2 Frequency differential amplifying, obtain the intermediate-freuqncy signal output that frequency range is 950MHz～2150MHz, connect and send satellite receiver to by output interface again.
Above-described embodiment and graphic and non-limiting product form of the present utility model and style, suitable variation or modification that any person of an ordinary skill in the technical field does it, all should be considered as not departing from patent category of the present utility model.
Claims (7)
1. a KU band dual polarization dual output tuner, it is characterized in that: comprise feed, internal circuit board circuit board box, be arranged on two joints on circuit board box, and be connected between described feed and described circuit board box, for the waveguide pipe of transmission of signal, on described circuit board box, be further provided with circuit board lid; Described circuit board is provided with one-level high-frequency amplifier circuit, secondary high-frequency amplifier circuit, filter circuit, crystal oscillating circuit, frequency conversion output circuit, control circuit and three-terminal voltage-stabilizing circuit, wherein, three-terminal voltage-stabilizing circuit is connected with control circuit, control circuit is connected with one-level high-frequency amplifier circuit, secondary high-frequency amplifier circuit and frequency conversion output circuit simultaneously, filter circuit is connected between secondary high-frequency amplifier circuit and frequency conversion output circuit, and crystal oscillating circuit is connected with frequency conversion output circuit; Foregoing circuit comprises V circuit and H circuit, V circuit receives the radiofrequency signal of vertical antenna, through one-level high-frequency amplifier circuit and twice amplification of secondary high-frequency amplifier circuit, by being sent to frequency conversion output circuit after filter circuit filtering, after obtaining V road intermediate-freuqncy signal, the mixing of frequency conversion output circuit amplifies output again; H circuit receives the radiofrequency signal of horizontal antenna, through one-level high-frequency amplifier circuit and twice amplification of secondary high-frequency amplifier circuit, then by being sent to frequency conversion output circuit after filter circuit filtering, amplifies output after the mixing of frequency conversion output circuit obtains H road intermediate-freuqncy signal; Above-mentioned frequency conversion output circuit adopts the frequency conversion chip that model is TFF1013.
2. a kind of KU band dual polarization dual output tuner as claimed in claim 1, it is characterized in that: above-mentioned crystal oscillating circuit comprises 25MHz crystal oscillator, electric capacity, electric capacity, crystal oscillator one end connects the HB1 end of V line frequency conversion chip by series capacitance, other end series capacitance connects the HB2 end of frequency conversion chip.
3. a kind of KU band dual polarization dual output tuner as claimed in claim 1, is characterized in that: above-mentioned one-level high-frequency amplifier circuit comprises successively connected V field of line effect transistor, V line the first transistor; And connected H field of line effect transistor, H line the first transistor successively.
4. a kind of KU band dual polarization dual output tuner as claimed in claim 3, is characterized in that: described field-effect transistor adopts the field effect transistor that model is NEC3503, and described the first transistor adopts the field effect transistor that model is ON5087.
5. a kind of KU band dual polarization dual output tuner as claimed in claim 1, it is characterized in that: above-mentioned secondary high-frequency amplifier circuit comprises two V line transistor secondses parallel with one another, and two H line transistor secondses parallel with one another, vertical signal is after one-level high-frequency amplifier circuit amplifies processing, be divided into two-way by power divider, again amplify processing through two V line transistor secondses in parallel respectively.
6. a kind of KU band dual polarization dual output tuner as claimed in claim 1, is characterized in that: above-mentioned control circuit adopts the control chip that model is LS3211.
7. a kind of KU band dual polarization dual output tuner as claimed in claim 1, it is characterized in that: above-mentioned three-terminal voltage-stabilizing circuit comprises the three-terminal voltage-stabilizing pipe that 2 models are UTC78M06, and being connected to 2 diodes of two blocks of three-terminal voltage-stabilizing pipes, two three-terminal voltage-stabilizing pipes are connected with control chip by after 2 diodes respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420043049.0U CN203722753U (en) | 2014-01-23 | 2014-01-23 | KU-waveband dual-polarized dual output high frequency tuner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420043049.0U CN203722753U (en) | 2014-01-23 | 2014-01-23 | KU-waveband dual-polarized dual output high frequency tuner |
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| CN203722753U true CN203722753U (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420043049.0U Withdrawn - After Issue CN203722753U (en) | 2014-01-23 | 2014-01-23 | KU-waveband dual-polarized dual output high frequency tuner |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780885A (en) * | 2014-01-23 | 2014-05-07 | 浙江盛洋科技股份有限公司 | KU wave band dual polarization dual output tuner |
| CN104486568A (en) * | 2015-01-04 | 2015-04-01 | 安徽波维电子科技有限公司 | Double-power-module Ku waveband tuner |
| CN106130593A (en) * | 2016-06-29 | 2016-11-16 | 华讯方舟科技（湖北）有限公司 | A kind of double reception microwave frequency changer circuit and microwave converter |
| 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 |
-
2014
- 2014-01-23 CN CN201420043049.0U patent/CN203722753U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780885A (en) * | 2014-01-23 | 2014-05-07 | 浙江盛洋科技股份有限公司 | KU wave band dual polarization dual output tuner |
| CN104486568A (en) * | 2015-01-04 | 2015-04-01 | 安徽波维电子科技有限公司 | Double-power-module Ku waveband tuner |
| CN106130593A (en) * | 2016-06-29 | 2016-11-16 | 华讯方舟科技（湖北）有限公司 | A kind of double reception microwave frequency changer circuit and microwave converter |
| CN106130593B (en) * | 2016-06-29 | 2018-11-23 | 华讯方舟科技（湖北）有限公司 | A kind of double reception microwave frequency changer circuit and microwave converter |
| 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 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20140716 Effective date of abandoning: 20170517 |
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| AV01 | Patent right actively abandoned |