CN206673068U - For satellite TV signal and the anti-tampering combiner and its system of positioning signal - Google Patents
For satellite TV signal and the anti-tampering combiner and its system of positioning signal Download PDFInfo
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- CN206673068U CN206673068U CN201720516519.4U CN201720516519U CN206673068U CN 206673068 U CN206673068 U CN 206673068U CN 201720516519 U CN201720516519 U CN 201720516519U CN 206673068 U CN206673068 U CN 206673068U
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Abstract
The utility model discloses the anti-tampering combiner for satellite TV signal and positioning signal, including the first input lead, the second input lead and output lead；First input lead and the second input lead connection, and tie point connection output lead；The distance between first input lead and the second input lead distance is arranged alternately；Maximum distance between first input lead and the second input lead is 120~190mil；Minimum distance between first input lead and the second input lead is 25~55mil.The invention also discloses the anti-interference system using the combiner, the utility model is used for satellite TV signal and the anti-tampering combiner of positioning signal, by the way that the distance between an input lead and the second input lead distance are arranged alternately, so that the performance of combiner is in the case where meeting resistance requirements, it is smaller, and standing-wave ratio is up to 1.3.
Description
Technical field
It the utility model is related to microwave communication field, and in particular to for the anti-tampering of satellite TV signal and positioning signal
Combiner and its system.
Background technology
With the development of information technology, popularization that satellite TV system obtains in many regions.Because satellite television covers
Area is big, and covering cost is cheap, thus the popularization of satellite TV system greatly facilitate cable television can not overlay area
The life of the people.But satellite TV system is installed to the region of cable television arrival by some criminals, causes wired
The unnecessary economic loss of TV.Therefore, in the prior art, set top box is positioned by GNSS, will by combiner
GNSS signal and satellite TV signal are transmitted to set top box by same root feeder line, it is achieved thereby that being monitored to set top box.
But because satellite TV signal and GNSS signal frequency approach, and the gain of satellite TV signal output is
60db, and the gain of GNSS signal output is 30db, so being combined to satellite TV signal with GNSS signal, and is passed through
When same root feeder line transmits, it can disturb between the two, common combiner is shown when being combined to both
Abnormal low performance, embodying a concentrated expression of can not meet that resistance requirements, oversized and standing-wave ratio are too high.
Utility model content
Technical problem to be solved in the utility model be satellite TV signal be combined with GNSS signal and when pass through
When same root feeder line transmits, it can disturb between the two, common combiner is shown when being combined to both
Abnormal low performance, embody a concentrated expression of can not meet resistance requirements, oversized and standing-wave ratio it is too high, and it is an object of the present invention to provide with
In satellite TV signal and the anti-tampering combiner and its system of positioning signal, solve the above problems.
The utility model is achieved through the following technical solutions：
Led for satellite TV signal and the anti-tampering combiner of positioning signal, including the first input lead, the second input
Line and output lead；First input lead and the second input lead connection, and tie point connection output lead；Described
The distance between one input lead and the second input lead distance are arranged alternately；First input lead and the second input lead
Between maximum distance be 120~190mil；Minimum distance between first input lead and the second input lead is 25
~55mil.
In the prior art, when being transmitted when satellite TV signal is combined simultaneously with GNSS signal by same root feeder line, two
It can be disturbed between person, common combiner shows abnormal low performance, concentrated when being combined to both
Showing can not meet that resistance requirements, oversized and standing-wave ratio are too high.In the prior art, the impedance of increase combiner uses more prolongs
The mode of long wiring, although this mode can meet resistance requirements, combiner size can be caused to increase, cost improves；
Simultaneously as the frequency of satellite TV signal and GNSS signal is approached still and differed, result in combiner combining signal
When, both signals occur significantly to reflect in wire or waveguide, so as to greatly improve standing-wave ratio, have had a strong impact on combining
The power output of device so that TV broadcast signal effect is deteriorated.
When the utility model is applied, the first input lead and the second input lead bend setting, so as to which the first input is led
The distance between line and the second input lead distance are arranged alternately so that two wires mutually couple, in two wires
Signal matches each other, and reduces signal reflex, so as to reduce standing-wave ratio；Simultaneously because the first input lead and the second input are led
The distance between line distance is arranged alternately so that the impedance increase between the first input lead and the second input lead, and
Distance alternately at, wire due to autonomous induction so as to produce new induced impedance so that on the premise of not increased in size,
Reach preferable resistance requirements；Inventor after being emulated and being tested by having found, when the first input lead and the second input are led
Maximum distance between line is 120~190mil, and the minimum distance between the first input lead and the second input lead is 25
During~55mil, standing-wave ratio best effects can reach 1.33, meanwhile, meet the output impedance requirement of combiner.The utility model
By the way that the distance between an input lead and the second input lead distance are arranged alternately so that the performance of combiner is meeting to hinder
It is smaller in the case of anti-requirement, and standing-wave ratio is up to 1.33.
Further, the walks wire shaped of first input lead and the second input lead is square waveform, and above-mentioned two
The walks wire shaped of person is symmetrical along center line between the two.
When the utility model is applied, the distance between the first input lead and the second input lead distance are arranged alternately excellent
Elect square waveform as, and the walks wire shaped of the first input lead and the second input lead is symmetrical along center line between the two.Invention
People has found that impedance caused by the wire of square waveform cabling is highest by creative work, that is to say, that square waveform cabling
Wire on the premise of not increased in size, can further improve impedance.The utility model is by by the first input lead
Square waveform is disposed as with the walks wire shaped of the second input lead so that the performance of combiner is meeting the situation of resistance requirements
Under, it is smaller.
Further, the distance of the square waveform medium wave peak and trough is 43~73mil；It is adjacent in the square waveform
The distance of crest and trough central axis is 12~42mil.
When the utility model is applied, inventor is had found by creative work, when the square waveform medium wave peak and trough
Distance is 43~73mil, and when the distance of adjacent crest and trough central axis is 12~42mil, standing-wave ratio can enter one
The effect for reaching 1.3 of step.
Further, first input lead, the second input lead and output lead use microstrip line or strip line；Institute
The width for stating the first input lead, the second input lead and output lead is 8~20mil.
When the utility model is applied, the first input lead, the second input lead and output lead use microstrip line or banding
Line can reach more preferable impedance matching effect, while the width of the first input lead, the second input lead and output lead is 8
~20mil can reach the purpose of matching impedance.
Further, the utility model also includes balance resistance；First input lead and the second input lead input
One end of signal is connected by balance resistance.
When the utility model is applied, balance resistance connects one end of the first input lead and the second input lead input signal
Connect so that two output ports it is signal-balanced；Simultaneously when wherein a wire occurs opening a way or be short-circuit, the power of reflection
By resistance absorption, the safety of whole signal line ensure that.
Further, the utility model also includes the first isolation capacitance, the second isolation capacitance and the 3rd isolation capacitance；It is described
First isolation capacitance is arranged at the signal input part of the first input lead；Second isolation capacitance is arranged at the second input lead
Signal input part；3rd isolation capacitance is arranged at the signal output part of output lead.
Further, the capacity of first isolation capacitance and the second isolation capacitance is 5~15pF；3rd isolation
The capacity of electric capacity is 1~5pF.
When the utility model is applied, because the input/output terminal of combiner is frequently necessary to be total to interface with DC signals, this will
DC signals are caused to disturb the signal in combiner, the utility model is by setting three isolation resistances, and the first isolation
The capacity of electric capacity and the second isolation capacitance is 5~15pF, and the capacity of the 3rd isolation capacitance is 1~5pF, realizes and DC signals are entered
Row isolation.
Further, the length of first input lead and the second input lead is that combiner centre frequency corresponds to ripple
Long a quarter.
When the utility model is applied, the first input lead and the second input lead are that bending is set, length described herein
The length being stretched to for the first input lead and the second input lead under straight configuration.Due to defeated to the first input lead and second
Enter the distance between wire distance to be arranged alternately so that can prolong conductor length on the premise of change in size is little
Stretch, when conductor length is a quarter of combiner centre frequency corresponding wavelength, signal reflex is minimum, and power attenuation is also just most
It is small.
Using the anti-interference system of combiner described in the utility model, including：For receiving satellite TV signal and handling
Tuner；For receiving the secondary signal receiving unit of positioning satellite signal；For carrying out LNA to positioning satellite signal
The 2nd big LNA units；The second filter unit being filtered for the positioning satellite signal after amplifying to low noise；For to filter
The amplifying unit that positioning satellite signal after ripple is amplified；For by the satellite TV signal after processing and the positioning after processing
Satellite-signal is combined and sent to the combiner of set top box.
When the utility model is applied, tuner receives satellite TV signal and handled, and secondary signal receiving unit receives fixed
Position satellite-signal, the 2nd LNA units carry out low noise amplification to positioning satellite signal, and the second filter unit after low noise amplification to determining
Position satellite-signal is filtered, and amplifying unit is amplified to filtered positioning satellite signal, and combiner is by defending after processing
Positioning satellite signal after star TV signal and processing is combined and sent to set top box, due to having used in the utility model
Described combiner so that the signal that set top box receives does not disturb, and the signal after demodulation is more accurate.
Further, the tuner includes：For receiving the first signal receiving unit of satellite TV signal；For right
Satellite TV signal carries out the first LNA units of low noise amplification；It is filtered for the satellite TV signal after amplifying to low noise
The first filter unit；For to filtered satellite TV signal downconvert to the down coversion list of level needed for set top box
Member；For carrying out the low-pass filter unit of LPF to the satellite TV signal after down coversion.
When the utility model is applied, the first signal receiving unit receives satellite TV signal, and the first LNA units are to satellite electricity
Low noise amplification is carried out depending on signal, the satellite TV signal after the first filter unit amplifies to low noise is filtered, down-converter unit
Filtered satellite TV signal is carried out to downconvert to level needed for set top box, low-pass filter unit is to the satellite after down coversion
TV signal carries out LPF so that satellite TV signal preferably can be combined with positioning signal.
First signal receiving unit described above, secondary signal receiving unit, the first LNA units, the 2nd LNA units,
One filter unit, the second filter unit, down-converter unit, low-pass filter unit and amplifying unit are prior art, this practicality
It is new to be combined, realize new technique effect.
The utility model compared with prior art, has the following advantages and advantages：
1st, the utility model is used for the anti-tampering combiner of satellite TV signal and positioning signal, by by an input lead
The distance between second input lead distance is arranged alternately so that the performance of combiner in the case where meeting resistance requirements,
It is smaller, and standing-wave ratio is up to 1.33；
2nd, the utility model is used for satellite TV signal and the anti-tampering combiner of positioning signal, by the way that the first input is led
The walks wire shaped of line and the second input lead is disposed as square waveform so that the performance of combiner is meeting the situation of resistance requirements
Under, it is smaller；
3rd, the utility model is used for satellite TV signal and the anti-tampering combiner of positioning signal, when the square waveform medium wave
The distance of peak and trough is 43~73mil, and when the distance of adjacent crest and trough central axis is 12~42mil, standing wave
Than the effect that can further reach 1.3；
4th, the utility model anti-interference system, due to having used the combiner described in the utility model so that set top box
The signal received does not disturb, and the signal after demodulation is more accurate.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the utility model embodiment, forms the one of the application
Part, the restriction to the utility model embodiment is not formed.In the accompanying drawings：
Fig. 1 is the utility model combiner structure schematic diagram；
Fig. 2 is Tthe utility model system structural representation；
Fig. 3 is tuner system schematic；
Fig. 4 is the comparison structure schematic diagram of embodiment 9；
Fig. 5 is the comparison structure schematic diagram of embodiment 9.
Mark and corresponding parts title in accompanying drawing：
The input leads of 1- first, the input leads of 2- second, 3- output leads, 4- balance resistances, the isolation capacitances of 5- first, 6-
Second isolation capacitance, the isolation capacitances of 7- the 3rd.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, it is not intended as to restriction of the present utility model.
Embodiment 1
As shown in figure 1, the utility model is used for satellite TV signal and the anti-tampering combiner of positioning signal, including first
Input lead 1, the second input lead 2 and output lead 3；The input lead 2 of first input lead 1 and second connects, and should
Tie point connection the distance between output lead 3, the input lead 2 of the first input lead 1 and second distance is arranged alternately；Institute
It is 120~190mil to state the maximum distance between the first input lead 1 and the second input lead 2；The He of first input lead 1
Minimum distance between second input lead 2 is 25~55mil.
When the present embodiment is implemented, the first input lead 1 and the second input lead 2 bend setting, so as to which the first input is led
The distance between the input lead 2 of line 1 and second distance is arranged alternately so that two wires mutually couple, in two wires
Signal match each other, reduce signal reflex, so as to reduce standing-wave ratio；Simultaneously because the first input lead 1 and second is defeated
Enter the distance between wire 2 distance to be arranged alternately so that the impedance increase between the first input lead 1 and the second input lead 2,
And at far and near alternating, wire due to autonomous induction so as to produce new induced impedance so that in not increased in size
Under the premise of, reach preferable resistance requirements；Inventor after being emulated and being tested by having found, when the first input lead 1 and
Maximum distance between two input leads 2 is 120~190mil, and between the first input lead 1 and the second input lead 2 most
When being closely 25~55mil, standing-wave ratio best effects can reach 1.33, meanwhile, meet the output impedance requirement of combiner.
Embodiment 2
As shown in figure 1, the present embodiment is on the basis of embodiment 1, between the first input lead 1 and the second input lead 2
Maximum distance be preferably 155mil, and the minimum distance between the first input lead 1 and the second input lead 2 is preferably
39mil。
When the present embodiment is implemented, inventor is emulated, simulation result such as table 1 by emulation experiment to a variety of distances
Shown, all simulation results are carried out in the case of impedance reaches 25 ohm, and first is classified as the first input lead 1 and second in table
Maximum distance between input lead 2, the minimum distance between first behavior the first input lead 1 and the second input lead 2：
Table 1
From in table 1, the maximum distance between the first input lead 1 and the second input lead 2 is 155mil, and first
When minimum distance between the input lead 2 of input lead 1 and second is 39mil, standing-wave ratio reaches best effects 1.33.
Embodiment 3
As shown in figure 1, the present embodiment is on the basis of embodiment 2, the input lead 2 of the first input lead 1 and second
Walks wire shaped be square waveform, and the two walks wire shaped is symmetrical along center line between the two.
When the present embodiment is implemented, the distance between the first input lead 1 and the second input lead 2 distance are arranged alternately excellent
Elect square waveform as, and the walks wire shaped of the first input lead 1 and the second input lead 2 is symmetrical along center line between the two.Hair
A person of good sense has found that impedance caused by the wire of square waveform cabling is highest, that is to say, that square waveform is walked by creative work
The wire of line can further improve impedance on the premise of not increased in size.The utility model is by the way that the first input is led
The walks wire shaped of the input lead 2 of line 1 and second is disposed as square waveform so that the performance of combiner is meeting the feelings of resistance requirements
It is smaller under condition.
Embodiment 4
As shown in figure 1, the present embodiment, on the basis of embodiment 3, the distance of the square waveform medium wave peak and trough is 43
~73mil；The distance of adjacent crest and trough central axis is 12~42mil in the square waveform.
When the present embodiment is implemented, inventor is had found by creative work, when the square waveform medium wave peak and trough away from
From for 43~73mil, and when the distance of adjacent crest and trough central axis is 12~42mil, standing-wave ratio can be further
The effect for reaching 1.3.
Embodiment 5
As shown in figure 1, the present embodiment, on the basis of embodiment 4, the distance of square waveform medium wave peak and trough is preferably
58mil, and the distance of adjacent crest and trough central axis is preferably 27mil.
When the present embodiment is implemented, inventor is emulated, simulation result such as table 2 by emulation experiment to a variety of distances
Shown, all simulation results are carried out in the case of impedance reaches 25 ohm, and first is classified as in adjacent crest and trough in table
The distance of the distance of the distance of mandrel line, the first behavior crest and trough, square waveform medium wave peak and trough is 58mil, and adjacent
Crest and the distance of trough central axis when being 27mil, standing-wave ratio reaches 1.3.
Table 2
From in table 2, the distance of square waveform medium wave peak and trough is 58mil, and adjacent crest and trough central shaft
When the distance of line is 27mil, standing-wave ratio reaches best effects 1.3.
Embodiment 6
As shown in figure 1, the present embodiment is on the basis of embodiment 1, first input lead 1, the and of the second input lead 2
Output lead 3 uses microstrip line or strip line；The width of first input lead 1, the second input lead 2 and output lead 3
For 8~20mil.
When the present embodiment is implemented, the first input lead 1, the second input lead 2 and output lead 3 are preferably microstrip line；The
The width of one input lead 1, the second input lead 2 and output lead 3 is preferably 15mil.
Embodiment 7
As shown in figure 1, the present embodiment is on the basis of embodiment 1, in addition to balance resistance 4；First input lead 1
Connected with one end of the input signal of the second input lead 2 by balance resistance 4.
When the present embodiment is implemented, balance resistance 4 is preferably 101 resistance, and balance resistance 4 is by the first input lead 1 and second
One end connection of the input signal of input lead 2 so that two output ports it is signal-balanced；Wherein a wire ought occur simultaneously
Open circuit or it is short-circuit when, the power of reflection ensure that the safety of whole signal line by resistance absorption.
Embodiment 8
As shown in figure 1, the present embodiment is on the basis of embodiment 1, in addition to the first isolation capacitance 5, the second isolation capacitance 6
With the 3rd isolation capacitance 7；First isolation capacitance 5 is arranged at the signal input part of the first input lead 1；Second isolation
Electric capacity 6 is arranged at the signal input part of the second input lead 2；The signal that 3rd isolation capacitance 7 is arranged at output lead 3 is defeated
Go out end；The capacity of the isolation capacitance 6 of first isolation capacitance 5 and second is 5~15pF；The capacity of 3rd isolation capacitance 7
For 1~5pF.
When the present embodiment is implemented, the capacity of the first isolation capacitance 5 and the second isolation capacitance 6 is preferably 10pF；Described 3rd
The capacity of isolation capacitance 7 is 3pF, and because the input/output terminal of combiner is frequently necessary to be total to interface with DC signals, this is just
DC signals can be caused to disturb the signal in combiner.
Embodiment 9
As shown in Figure 1, Figure 4 and Figure 5, the present embodiment compared for existing two kinds of combinings on the basis of embodiment 1~9
Device；Fig. 4 is conventional microstrip line combiner, and the microstrip line combiner includes two input leads and an output lead；Fig. 5 is normal
With LC combiners, the combiner includes two inputs and an output end, and two input ends and output set electric capacity,
Ground connection is set also between input and output end.When being combined to identical satellite TV signal and GNSS signal, when
When matching impedance is 25 ohm, caused standing-wave ratio contrast is as shown in table 3：
Table 3
| Conventional microstrip line combiner | Conventional LC combiners | The utility model combiner | |
| Standing-wave ratio | 2 | 1.45 | 1.3 |
From table 3 it is observed that the standing-wave ratio of conventional microstrip line combiner is up to 2, the standing-wave ratio for commonly using LC combiners is high
Up to 1.45, the standing-wave ratio of the utility model combiner is only 1.3.
Embodiment 10
As shown in Fig. 2 the utility model anti-interference system, including：For the high frequency for receiving satellite TV signal and handling
Head；For receiving the secondary signal receiving unit of positioning satellite signal；For carrying out the of low noise amplification to positioning satellite signal
Two LNA units；The second filter unit being filtered for the positioning satellite signal after amplifying to low noise；For to filtered
The amplifying unit that positioning satellite signal is amplified；For the satellite TV signal after processing and the position location satellite after processing to be believed
Number it is combined and sends to the combiner of set top box.
When the present embodiment is implemented, the 2nd LNA units are preferably the 2SC5508 of auspicious Sa, and the second filter unit is preferably to be full of to add
The NDFG002 of electronics, amplifying unit are preferably the 2SC5508 of auspicious Sa, and tuner receives satellite TV signal and handled, the second letter
Number receiving unit receives positioning satellite signal, and the 2nd LNA units carry out low noise amplification, the second filter unit to positioning satellite signal
Positioning satellite signal after amplifying to low noise is filtered, and amplifying unit is amplified to filtered positioning satellite signal, is closed
Satellite TV signal after processing and the positioning satellite signal after processing are combined and sent to set top box by road device, due to making
With the combiner described in the utility model so that the signal that set top box receives does not disturb, the signal after demodulation
It is more accurate.
Embodiment 11
As shown in Figures 2 and 3, on the basis of embodiment 10, the tuner includes the present embodiment：For receiving satellite
First signal receiving unit of TV signal；For carrying out the first LNA units of low noise amplification to satellite TV signal；For right
The first filter unit that satellite TV signal after low noise amplification is filtered；For being carried out to filtered satellite TV signal
Downconvert to the down-converter unit of level needed for set top box；For carrying out LPF to the satellite TV signal after down coversion
Low-pass filter unit.
When the present embodiment is implemented, the first signal receiving unit and the first LNA units are preferably the NEC3512 of auspicious Sa, and first
Wave filter is preferably 10.7ghz-12.2ghz microstrip filters, and down-converter unit is preferably the RDA3566 crystal oscillators of sharp enlightening, low pass
Wave filter is preferably preferred sharp electronics LF32L1200H45-L04.First signal receiving unit receives satellite TV signal, the first LNA
Unit carries out low noise amplification to satellite TV signal, and the satellite TV signal after the first filter unit amplifies to low noise is filtered
Ripple, down-converter unit carry out downconverting to level needed for set top box, low-pass filter unit pair to filtered satellite TV signal
Satellite TV signal after down coversion carries out LPF so that satellite TV signal can be closed preferably with positioning signal
Road.
Embodiment 12
The present embodiment is on the basis of embodiment 10 to 11, and Tthe utility model system is to the performance requirement of combiner and this reality
It is as shown in table 4 with Novel combiner performance：
Table 4
From table 4, the utility model combiner performance is fully met closes to GNSS signal and satellite TV signal
The requirement on road.
Above-described embodiment, the purpose of this utility model, technical scheme and beneficial effect are entered
One step describes in detail, should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, it is all within the spirit and principles of the utility model, any modification for being made, equally replace
Change, improve, should be included within the scope of protection of the utility model.
Claims (10)
1. led for satellite TV signal and the anti-tampering combiner of positioning signal, including the first input lead (1), the second input
Line (2) and output lead (3)；First input lead (1) and the second input lead (2) connection, and tie point connection is defeated
Go out wire (3), it is characterised in that the distance between first input lead (1) and the second input lead (2) are far and near alternately to arrange
Cloth；Maximum distance between first input lead (1) and the second input lead (2) is 120~190mil；Described first is defeated
It is 25~55mil to enter the minimum distance between wire (1) and the second input lead (2).
It is 2. according to claim 1 for satellite TV signal and the anti-tampering combiner of positioning signal, it is characterised in that
The walks wire shaped of first input lead (1) and the second input lead (2) is square waveform, and the two walks wire shaped
It is symmetrical along center line between the two.
It is 3. according to claim 2 for satellite TV signal and the anti-tampering combiner of positioning signal, it is characterised in that
The distance of the square waveform medium wave peak and trough is 43~73mil；Adjacent crest and trough central axis in the square waveform
Distance be 12~42mil.
It is 4. according to claim 1 for satellite TV signal and the anti-tampering combiner of positioning signal, it is characterised in that
First input lead (1), the second input lead (2) and output lead (3) use microstrip line or strip line；Described first is defeated
The width for entering wire (1), the second input lead (2) and output lead (3) is 8~20mil.
It is 5. according to claim 1 for satellite TV signal and the anti-tampering combiner of positioning signal, it is characterised in that
Also include balance resistance (4)；One end of first input lead (1) and the second input lead (2) input signal passes through balance
Resistance (4) connects.
It is 6. according to claim 1 for satellite TV signal and the anti-tampering combiner of positioning signal, it is characterised in that
Also include the first isolation capacitance (5), the second isolation capacitance (6) and the 3rd isolation capacitance (7)；First isolation capacitance (5) sets
It is placed in the signal input part of the first input lead (1)；Second isolation capacitance (6) is arranged at the letter of the second input lead (2)
Number input；3rd isolation capacitance (7) is arranged at the signal output part of output lead (3).
It is 7. according to claim 6 for satellite TV signal and the anti-tampering combiner of positioning signal, it is characterised in that
The capacity of first isolation capacitance (5) and the second isolation capacitance (6) is 5~15pF；The capacity of 3rd isolation capacitance (7)
For 1~5pF.
It is 8. according to claim 1 for satellite TV signal and the anti-tampering combiner of positioning signal, it is characterised in that
The length of first input lead (1) and the second input lead (2) be combiner centre frequency corresponding wavelength four/
One.
9. the anti-interference system of combiner described in any one in usage right requirement 1 to 8, it is characterised in that including：
For the tuner for receiving satellite TV signal and handling；
For receiving the secondary signal receiving unit of positioning satellite signal；
For carrying out the 2nd LNA units of low noise amplification to positioning satellite signal；
The second filter unit being filtered for the positioning satellite signal after amplifying to low noise；
For the amplifying unit being amplified to filtered positioning satellite signal；
For the satellite TV signal after processing and the positioning satellite signal after processing to be combined and send to set top box
Combiner.
10. anti-interference system according to claim 9, it is characterised in that the tuner includes：
For receiving the first signal receiving unit of satellite TV signal；
For carrying out the first LNA units of low noise amplification to satellite TV signal；
The first filter unit being filtered for the satellite TV signal after amplifying to low noise；
For to filtered satellite TV signal downconvert to the down-converter unit of level needed for set top box；
For carrying out the low-pass filter unit of LPF to the satellite TV signal after down coversion.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720516519.4U CN206673068U (en) | 2017-05-10 | 2017-05-10 | For satellite TV signal and the anti-tampering combiner and its system of positioning signal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720516519.4U CN206673068U (en) | 2017-05-10 | 2017-05-10 | For satellite TV signal and the anti-tampering combiner and its system of positioning signal |
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| Publication Number | Publication Date |
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| CN206673068U true CN206673068U (en) | 2017-11-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106997980A (en) * | 2017-05-10 | 2017-08-01 | 四川省视频电子有限责任公司 | For satellite TV signal and the anti-tampering combiner and its system of positioning signal |
-
2017
- 2017-05-10 CN CN201720516519.4U patent/CN206673068U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106997980A (en) * | 2017-05-10 | 2017-08-01 | 四川省视频电子有限责任公司 | For satellite TV signal and the anti-tampering combiner and its system of positioning signal |
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