CN104486568A - Double-power-module Ku waveband tuner - Google Patents
Double-power-module Ku waveband tuner Download PDFInfo
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- CN104486568A CN104486568A CN201510000832.8A CN201510000832A CN104486568A CN 104486568 A CN104486568 A CN 104486568A CN 201510000832 A CN201510000832 A CN 201510000832A CN 104486568 A CN104486568 A CN 104486568A
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Abstract
The invention discloses a double-power-module Ku waveband tuner which comprises a probe unit, a signal amplification unit, a local oscillator circuit, a filtering unit, a mixing circuit and two power modules. The probe unit is used for receiving polarization signals. The signal amplification unit is used for receiving the polarization signals transmitted by a probe and conducting low noise amplification on the polarization signals, the local oscillator circuit is used for generating local frequency, the filtering unit is used for conducting frequency selection on the high-frequency amplified signals output by the signal amplification unit, the mixing circuit is used for receiving target-frequency-band signals output by the filtering unit and conducting mixing on the target-frequency-band signals and the local frequency output by the local oscillator circuit, the mixing circuit is provided with a head F for outputting intermediate frequency signals and power supply input, the two power modules are arranged at the intermediate frequency output end, the installation positions of the two power modules on a printed circuit board are symmetric, and each power module comprises a voltage stabilizer and a diode. The double-power-module Ku waveband tuner can be combined with an additional filter capacitor, and electromagnetic interference generated by a working power source on a circuit is lowered.
Description
Technical field
The present invention relates to a kind of dual-power module Ku wave band tuner, 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 effect of its making high frequency head receives satellite TV signal, and selection, the signal in line frequency road of going forward side by side amplify and frequency-conversion processing, the intermediate-freuqncy signal of final stable output.Single local oscillator tuner of Ku wave band of the prior art is the structure of single supply module, and is positioned over signal input part; Easily produce electric leakage when the electric capacity that working power is distributed by circuit and insulation resistance, signal is intercoupled by the impedance of ground wire, power supply and transfer wire, or by interference that the mutual inductance between wire causes; For this reason, usually need to take these three kinds of modes of ground connection, shielding and filtering to carry out shield electromagnetic interference, but the shielding properties of ground connection, shielding and filtering these three kinds normally shield electromagnetic interference mode can not meet actual operation requirements relative to the tuner cavity of existing Ku wave band and circuit board, therefore need to provide one with improvement technical scheme to overcome the problems referred to above.
In addition, although namely single local oscillator tuner of conventional Ku wave band is provided with the horizontal probe for receiving horizontal polarization signals, also the Vertrical probe for receiving perpendicular polarization signal is provided with, but when single local oscillator tuner of a multi-user shared Ku wave band, single local oscillator tuner of Ku wave band can only export separately the intermediate-freuqncy signal of perpendicular polarization signal mixing generation simultaneously to receiver, or to the intermediate-freuqncy signal that the mixing of receiver independent output level polarized signal produces, and when namely different user needs the satellite programming watching perpendicular polarization signal, when needing again the satellite programming watching horizontal polarization signals, then could can only be realized by single local oscillator tuner of installation two Ku wave bands, therefore use cost is higher.
Summary of the invention
The present invention for the deficiency that prior art exists, provides a kind of dual-power module Ku wave band tuner, can overcome the electromagnetic interference that working power produces circuit, and be convenient to the wider signal of output bandwidth just.
For solving the problem, the technical solution used in the present invention is as follows:
A kind of dual-power module Ku wave band tuner, comprising:
For the probe unit of receiving polarization signal;
For receiving the polarized signal of described probe transmission, and the signal amplification unit of low noise amplification is carried out to polarized signal;
For generation of the local oscillation circuit of local frequency, described local oscillation circuit comprise concussion pipe and for providing the 5th triode of bias current to described concussion pipe;
High frequency amplification signal for exporting described signal amplification unit carries out the filter unit of He Ne laser;
For receiving the signal of the target frequency bands that described filter unit 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, described mixting circuit be provided with for export intermediate-freuqncy signal and for power input F head;
Be arranged at two power modules of medium frequency output end, and two described power modules installation site is symmetrical on a printed circuit board, two described power modules include voltage-stabiliser tube and diode.
As another object of the present invention, the present invention also provides a kind of dual output tuner, can meet the needs that single local oscillator tuner that different user shares a Ku wave band watches the satellite programming of perpendicular polarization signal and the satellite programming of horizontal polarization signals simultaneously, the present invention proposes further improvement for this reason:
Described probe unit comprises the Vertrical probe for receiving perpendicular polarization signal and the horizontal probe for receiving horizontal polarization signals; Described signal amplification unit comprises the perpendicular polarization signal for receiving the transmission of described Vertrical probe, and perpendicular polarization signal is carried out to the first triode and second triode of two-stage low noise amplification, and for receiving the horizontal polarization signals of described horizontal probe transmission, and horizontal polarization signals is carried out to the 3rd triode and the 4th triode of two-stage low noise amplification; Also comprise the biasing circuit chip for providing direct current biasing to described first triode, described second triode, described 3rd triode and described 4th triode, undistorted to ensure that signal voltage amplifies;
The described filter unit High frequency amplification signal comprised for exporting described second triode carries out the first band pass filter of He Ne laser and the second band pass filter for carrying out He Ne laser to the High frequency amplification signal of described 4th triode output; Described F head comprises left F head and right F head, and described mixting circuit is provided with the selector switch for connecting described first band pass filter, described second band pass filter, described left F head and described right F head.
As the improvement of technique scheme, described selector switch is A7532 chip, and described selector switch is connected with the tuner multiplexer (MUX for providing operating voltage.Particularly, described tuner multiplexer (MUX can be L8012 chip.
As the improvement of technique scheme, described first band pass filter and be respectively arranged with between described second band pass filter and described selector switch and the vertical power amplifier of one-level intermediate frequency amplification carried out to perpendicular polarization signal and horizontal polarization signals is carried out to the horizontal power amplifier of one-level intermediate frequency amplification; Described left F head and be respectively arranged with between described right F head and described selector switch the left output power amplifier of secondary amplification and right output power amplifier are carried out to dual output intermediate-freuqncy signal.
Compared with prior art, implementation result of the present invention is as follows in the present invention:
Dual-power module Ku wave band tuner of the present invention, by voltage source is placed on medium frequency output end, and installation site is symmetrically set two power modules on a printed circuit board, thus can reduce in conjunction with additional filter capacitor the electromagnetic interference that working power produces circuit, meet actual operation requirements.
In addition, the present invention makes horizontal probe and Vertrical probe Received signal strength simultaneously by adopting biasing circuit chip, and make different user can select to receive the IF output signal of different polarization mode as required respectively by arranging selector switch, the needs that single local oscillator tuner that different user shares a Ku wave band watches the satellite programming of perpendicular polarization signal and the satellite programming of horizontal polarization signals simultaneously can be met, and reduce multi-user and use single local oscillator tuner of Ku wave band to watch the cost of satellite television programming; And the preferred A7532 chip of the present invention is as being selector switch, the Signal segregation degree relative to the selector switch of eight diodes compositions of routine with output is good, can not affect the advantage of the output bandwidth of output signal.
Accompanying drawing explanation
Fig. 1 is the structural representation of single local oscillator mixing amplification dual output circuit of dual-power module Ku wave band tuner of the present invention;
Fig. 2 is the structural representation of the microwave signal reception amplifying circuit of dual-power module Ku wave band tuner of the present invention;
Fig. 3 is the structural representation of signal output selector switch conventional in the satellite receiving equipment of prior art;
Fig. 4 is the electrical block diagram of the power module of dual-power module Ku wave band tuner of the present invention;
Fig. 5 is the printed circuit board structural representation of dual-power module Ku wave band tuner of the present invention.
Embodiment
Below in conjunction with specific embodiments content of the present invention is described.
As shown in Figure 1, Figure 2, shown in Fig. 4 and Fig. 5, be dual-power module Ku wave band tuner structure schematic diagram of the present invention, the joint 1 in Fig. 1 and joint 2 are connected with joint 2 with the joint 1 in Fig. 2 respectively.Dual-power module Ku wave band tuner of the present invention, comprising:
For the probe unit of receiving polarization signal; Described probe unit comprises the Vertrical probe for receiving perpendicular polarization signal and the horizontal probe for receiving horizontal polarization signals;
For receiving the polarized signal of described probe transmission, and the signal amplification unit of low noise amplification is carried out to polarized signal; Described signal amplification unit comprises the perpendicular polarization signal for receiving the transmission of described Vertrical probe, and perpendicular polarization signal is carried out to the first triode Q1 and the second triode Q2 of two-stage low noise amplification, and for receiving the horizontal polarization signals of described horizontal probe transmission, and horizontal polarization signals is carried out to the 3rd triode Q3 and the 4th triode Q4 of two-stage low noise amplification;
For providing the biasing circuit chip IC 1 of direct current biasing to described first triode Q1, described second triode Q2, described 3rd triode Q3 and described 4th triode Q4, undistorted to ensure that signal voltage amplifies; Described biasing circuit chip IC 1 can be L8400 chip particularly;
For generation of the local oscillation circuit of local frequency, described local oscillation circuit comprises concussion pipe Z1 and for providing the 5th triode Z2 of bias current to described concussion pipe Z1;
High frequency amplification signal for exporting described signal amplification unit carries out the filter unit of He Ne laser; The described filter unit High frequency amplification signal comprised for exporting described second triode Q2 carries out the first band pass filter T1 of He Ne laser and the second band pass filter T2 for carrying out He Ne laser to the High frequency amplification signal of described 4th triode Q4 output;
For receiving the signal of the target frequency bands that described filter unit 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, particularly, described mixting circuit can realize mixer action by mixer tube Q5 and Q6, described mixting circuit be provided with for export intermediate-freuqncy signal and for power input F head; Described F head comprises left F head and right F head, and described mixting circuit is provided with the selector switch IC3 for connecting described first band pass filter T1, described second band pass filter T2, described left F head and described right F head; Described selector switch IC3 is A7532 chip, and described selector switch IC3 is connected with the tuner multiplexer (MUX IC2 for providing operating voltage; Particularly, described tuner multiplexer (MUX IC2 can be L8012 chip; Be respectively arranged with between described first band pass filter T1 and described second band pass filter T2 and described selector switch IC3 and the vertical power amplifier G2 of one-level intermediate frequency amplification carried out to perpendicular polarization signal and horizontal polarization signals is carried out to the horizontal power amplifier G1 of one-level intermediate frequency amplification; Described left F head and be respectively arranged with between described right F head and described selector switch IC3 the left output power amplifier G4 of secondary amplification and right output power amplifier G3 is carried out to dual output intermediate-freuqncy signal;
Be arranged at two power modules of medium frequency output end, and two described power modules installation site is symmetrical on a printed circuit board, two described power modules include voltage-stabiliser tube and diode.
As shown in Figure 4, two described power modules comprise voltage-stabiliser tube W1 and diode D1, voltage-stabiliser tube W2 and diode D2 respectively; Described voltage-stabiliser tube W1 and voltage-stabiliser tube W2 can be the positive fixed voltage pressurizer of electric current in 78,M05 tri-end particularly; Because dual output can or work independently simultaneously, when diode D1 and D2 can avoid dual output to work simultaneously, electric current is excessive burns voltage-stabiliser tube W1 and W2.As shown in Figure 5, in figure, Y1 and Y2 is the pad being respectively used to fixing described voltage-stabiliser tube W1 and described voltage-stabiliser tube W2, and the positional symmetry of Y1 and Y2, the electromagnetic interference that power supply produces circuit can be reduced significantly.
Particularly, described horizontal power amplifier G1, described vertical power amplifier G2, described right output power amplifier G3 and described left output power amplifier G4 can be BGA2709 chip.In figure, remaining resistance R1 ~ R7 is all for improving circuit performance according to actual needs, realizing matching effect, and electric capacity C1 ~ C18 is all for passing through signal, intercepting electric current, shield electromagnetic interference.
Described biasing circuit chip IC 1 i.e. L8400 chip gives described first triode Q1, described second triode Q2, described 3rd triode Q3 and described 4th triode Q4 provides identical positive negative bias, perpendicular polarization signal is received by Vertrical probe and be delivered to the first band pass filter T1 after described first triode Q1 and described second triode Q2 two-stage amplify, first band pass filter T1 transfers out the local frequency that the signal of target frequency bands and local oscillation circuit produce and carries out mixing to produce intermediate-freuqncy signal, intermediate-freuqncy signal is connected by described selector switch IC3 and is delivered to after described left output power amplifier G4 or described right output power amplifier G3 carries out the amplification of secondary intermediate frequency and is delivered to receiver by described left F head or described right F head after vertical power amplifier G2 amplifies, simultaneously, horizontal polarization signals is also received by horizontal probe and be delivered to the second band pass filter T2 after described 3rd triode Q3 and described 4th triode Q4 two-stage amplifies, second band pass filter T2 transfers out the local frequency that the signal of target frequency bands and local oscillation circuit produce and carries out mixing to produce intermediate-freuqncy signal, intermediate-freuqncy signal is connected by described selector switch IC3 and is delivered to after described left output power amplifier G4 or described right output power amplifier G3 carries out the amplification of secondary intermediate frequency and is delivered to receiver by described left F head or described right F head after horizontal power amplifier G1 amplifies.
When different users needs the signal selecting different polarization mode, send voltage control signal by receiver, thus control described selector switch IC3 and select.Particularly, when the user connecting described left F head needs the satellite programming watching horizontal polarization signals, and the user connecting described right F head is when needing the satellite programming watching perpendicular polarization signal, makes described left F head connect horizontal power amplifier G1, make described right F head connect vertical power amplifier G2.When the user and the user being connected described right F head that connect described left F head need the satellite programming watching horizontal polarization signals, described left F head is made all to be connected described horizontal power amplifier G1 with described right F head.In addition, for described selector switch IC3, usually the output adopting the diode of two groups of structures as shown in Figure 3 to realize horizontal signal and vertical signal in satellite receiving equipment is selected, but there is the inadequate problem of the Signal segregation degree of output in technique scheme, directly can affect the output bandwidth of output signal, then there are not the problems referred to above in the preferred A7532 chip of the present invention.
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 (4)
1. dual-power module Ku wave band tuner, is characterized in that, comprising:
For the probe unit of receiving polarization signal;
For receiving the polarized signal of described probe transmission, and the signal amplification unit of low noise amplification is carried out to polarized signal;
For generation of the local oscillation circuit of local frequency, described local oscillation circuit comprises concussion pipe (Z1) and for providing the 5th triode (Z2) of bias current to described concussion pipe (Z1);
High frequency amplification signal for exporting described signal amplification unit carries out the filter unit of He Ne laser;
For receiving the signal of the target frequency bands that described filter unit 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, described mixting circuit be provided with for export intermediate-freuqncy signal and for power input F head;
Be arranged at two power modules of medium frequency output end, and two described power modules installation site is symmetrical on a printed circuit board, two described power modules include voltage-stabiliser tube and diode.
2. dual-power module Ku wave band tuner as claimed in claim 1, it is characterized in that, described probe unit comprises the Vertrical probe for receiving perpendicular polarization signal and the horizontal probe for receiving horizontal polarization signals; Described signal amplification unit comprises the perpendicular polarization signal for receiving the transmission of described Vertrical probe, and perpendicular polarization signal is carried out to the first triode (Q1) and second triode (Q2) of two-stage low noise amplification, and for receiving the horizontal polarization signals of described horizontal probe transmission, and horizontal polarization signals is carried out to the 3rd triode (Q3) and the 4th triode (Q4) of two-stage low noise amplification; Also comprise the biasing circuit chip (IC1) for providing direct current biasing to described first triode (Q1), described second triode (Q2), described 3rd triode (Q3) and described 4th triode (Q4), undistorted to ensure that signal voltage amplifies;
The described filter unit High frequency amplification signal comprised for exporting described second triode (Q2) carries out the second band pass filter (T2) that first band pass filter (T1) of He Ne laser and the High frequency amplification signal for exporting described 4th triode (Q4) carry out He Ne laser; Described F head comprises left F head and right F head, and described mixting circuit is provided with the selector switch (IC3) for connecting described first band pass filter (T1), described second band pass filter (T2), described left F head and described right F head.
3. dual-power module Ku wave band tuner as claimed in claim 2, it is characterized in that, described selector switch (IC3) is A7532 chip, and described selector switch (IC3) is connected with the tuner multiplexer (MUX (IC2) for providing operating voltage.
4. dual-power module Ku wave band tuner as claimed in claim 2 or claim 3, it is characterized in that, described first band pass filter (T1) and be respectively arranged with between described second band pass filter (T2) and described selector switch (IC3) and the vertical power amplifier (G2) of one-level intermediate frequency amplification carried out to perpendicular polarization signal and horizontal polarization signals is carried out to the horizontal power amplifier (G1) of one-level intermediate frequency amplification; Described left F head and be respectively arranged with the left output power amplifier (G4) and the right output power amplifier (G3) that dual output intermediate-freuqncy signal are carried out to secondary amplification between described right F head and described selector switch (IC3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510000832.8A CN104486568A (en) | 2015-01-04 | 2015-01-04 | Double-power-module Ku waveband tuner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510000832.8A CN104486568A (en) | 2015-01-04 | 2015-01-04 | Double-power-module Ku waveband tuner |
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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 |
| CN107196688A (en) * | 2017-07-07 | 2017-09-22 | 成都新光微波工程有限责任公司 | A kind of outside broadcast TV MIMO dual polarizations binary channels broadband emission system |
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| CN107196688B (en) * | 2017-07-07 | 2020-07-28 | 成都新光微波工程有限责任公司 | MIMO dual-polarization dual-channel broadband emission system for outdoor broadcast television |
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