CN103715989A - Optical low-noise block down converter and satellite television system - Google Patents
Optical low-noise block down converter and satellite television system Download PDFInfo
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- CN103715989A CN103715989A CN201210375833.7A CN201210375833A CN103715989A CN 103715989 A CN103715989 A CN 103715989A CN 201210375833 A CN201210375833 A CN 201210375833A CN 103715989 A CN103715989 A CN 103715989A
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Abstract
Provided are an optical low-noise block down converter and a satellite television system. The optical low-noise block down converter is used in the satellite television system. The optical low-noise block down converter comprises a first down-conversion module coupled to a satellite antenna of the satellite television system and used for converting a vertical polarization signal received by the satellite antenna into a first intermediate-frequency signal, a second down-conversion module coupled to the satellite antenna and used for converting a horizontal polarization signal received by the satellite antenna into a second intermediate-frequency signal, and a third down-conversion module including a first input end and a second input end and used for absorbing part of the vertical polarization signal and the horizontal polarization signal and converting the absorbed part into a typical electrical signal, wherein the first input end is coupled between the satellite antenna and a first down-converter of the first down-conversion module, the second input end is coupled between the satellite antenna and a second down-converter of the second down-conversion module. Inconvenience in alignment and installation of a disk surface of the optical low-noise block down converter can be effectively reduced, and the installation efficiency can be accelerated.
Description
Technical field
The present invention relates to a kind of optical fiber lnb and satellite TV system, espespecially a kind of radio frequency satellite-signal that draws, convert it to exemplary electrical signal output, carry out according to this contraposition of satellite disc, to accelerate optical fiber lnb and the satellite TV system of installation effectiveness.
Background technology
In recent years, optical fiber lnb (Optical Low-Noise Block Down-converter, Optical LNB) application in satellite television broadcasting has become advanced trend, main cause is that optical communication has ultra broadband, low transmission loss under long distance, passive type optical branching filter, can transmit many lightwave signals simultaneously, be not subject to the advantages such as electromagnetic interference, and utilize single laser module satellite-signal can be sent to multi-user and the advantage such as remote, can overcome conventional transmission cable (as RG-6 cable) completely and cause the shortcoming that loss of signal cannot demodulation because of long distance.
Generally speaking, known optical fiber lnb includes a F formula connector and a FC formula connector, is used for respectively input DC power and output optical signal.Yet known optical fiber lnb, without the outgoing route of radio frequency satellite-signal (being the signal of telecommunication), cannot be supported typical case (Legacy) framework.Therefore, satellite TV system dealer, when satellite disc and satellite contraposition are installed, must utilize many flats equipment, the light signal of optical fiber lnb output is converted back to the signal of telecommunication, then send this signal of telecommunication to demodulating equipment (for example Set Top Box).So, the signal that the engineering staff of execution contraposition could export from demodulating equipment judges that whether contraposition is successful.Moreover satellite disc and optical fiber lnb are often arranged at roof or the exterior wall of building, these environment generally can not arrange supply socket or any power supply is provided.Therefore, engineering staff must pull out power supply from interior of building, to power to many flats equipment and demodulating equipment, so requires for engineering staff, will improve the degree of difficulty of carrying out contraposition, cause the time that satellite disc and satellite contraposition are installed to be elongated.
Therefore, how, under the design architecture of existing fiber lnb, directly draw radio frequency satellite-signal, convert it to exemplary electrical signal output, carry out according to this contraposition of satellite disc, to accelerate installation effectiveness, real be this area important topic one.
Summary of the invention
Therefore, main purpose of the present invention is to provide a kind of optical fiber lnb and satellite TV system, can draw radio frequency satellite-signal, converts it to exemplary electrical signal output, carries out according to this contraposition of satellite disc, to accelerate installation effectiveness.
The present invention discloses a kind of optical fiber lnb, this optical fiber lnb is for a satellite TV system, this optical fiber lnb comprises: one first frequency reducing module, this the first frequency reducing module is coupled to a satellite antenna of this satellite TV system, and a perpendicular polarization signal that is used for this satellite antenna to receive is converted to one first intermediate-freuqncy signal; One second frequency reducing module, this second frequency reducing module is coupled to this satellite antenna, and a horizontal polarization signal that is used for this satellite antenna to receive is converted to one second intermediate-freuqncy signal; And one the 3rd frequency reducing module, the 3rd frequency reducing module comprises a first input end and one second input, this first input end is coupled between this satellite antenna and one first frequency demultiplier of this first frequency reducing module, this second input is coupled between this satellite antenna and one second frequency demultiplier of this second frequency reducing module, be used for drawing this perpendicular polarization signal of part and this horizontal polarization signal and by after this perpendicular polarization signal and this horizontal polarization signal combination, be converted to an exemplary electrical signal.
The present invention also discloses a kind of satellite TV system, and this satellite TV system comprises: a satellite antenna, and this satellite antenna is used for receiving a perpendicular polarization signal and a horizontal polarization signal; One optical fiber lnb, this optical fiber lnb comprises: one first frequency reducing module, this first frequency reducing module is coupled to this satellite antenna, is used for this perpendicular polarization signal to be converted to one first intermediate-freuqncy signal; One second frequency reducing module, this second frequency reducing module is coupled to this satellite antenna, is used for this horizontal polarization signal to be converted to one second intermediate-freuqncy signal; And one the 3rd frequency reducing module, the 3rd frequency reducing module comprises a first input end and one second input, this first input end is coupled between this satellite antenna and one first frequency demultiplier of this first frequency reducing module, this second input is coupled between this satellite antenna and one second frequency demultiplier of this second frequency reducing module, be used for drawing this perpendicular polarization signal of part and this horizontal polarization signal and by after this perpendicular polarization signal and this horizontal polarization signal combination, be converted to an exemplary electrical signal; And a demodulating equipment, this demodulating equipment is coupled to this optical fiber lnb, is used for the running of reading exemplary electrical signal and controlling this optical fiber lnb.
The present invention is when carrying out dish face and satellite contraposition, can directly demodulating equipment be coupled to F formula connector and read exemplary electrical signal, judge that according to this whether the contraposition of satellite disc is successful, engineering staff must not go back to the signal of telecommunication by light signal, recycling Set Top Box reads this signal of telecommunication, so can erection & lift Discussing Convenience; In addition, typical signal of telecommunication output yet can provide signal quality to monitor, or other users' satellite reception information, so also promotes the surcharge of optical fiber lnb; On the other hand, demodulating equipment also exportable supply power supply to optical fiber lnb, and by adjusting the direct voltage size of supply power supply and the running that ac voltage signal is controlled optical fiber lnb, so can save the problem that traditional fiber lnb and demodulating equipment need to be found power supply separately.Under framework of the present invention, can effectively reduce inconvenience, acceleration installation effectiveness that optical fiber lnb dish is installed in the face of position.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a satellite TV system of the embodiment of the present invention.
Fig. 2 is the schematic diagram of an optical fiber lnb of the embodiment of the present invention.
Fig. 3 is the schematic diagram of a power divider that is applicable to the optical fiber lnb of Fig. 2.
Fig. 4 is the schematic diagram of a coupling circuit that is applicable to the optical fiber lnb of Fig. 2.
Fig. 5 is the schematic diagram of a low noise amplification unit that is applicable to the optical fiber lnb of Fig. 2.
Primary clustering symbol description:
1 satellite TV system
10 optical fiber lnbs
11 first frequency reducing modules
12 second frequency reducing modules
13 the 3rd frequency reducing modules
14,113,123,133 gain amplifiers
15 electricity/light conversion device
16 power supply units
17 multiplexers
The equipment of flat more than 18
19 demodulating equipments
110,120,130,131 low noise amplification unit
111,116,121,126,136 band pass filters
112,122,132 frequency demultipliers
114,124,134 oscillators
115,125,135 mixers
137,138 power dividers
101 F formula connectors
102 FC formula connectors
437 coupling circuits
511,512,513 low noise amplifiers
IN1 first input end
IN2 the second input
S1 the first intermediate-freuqncy signal
S2 the second intermediate-freuqncy signal
L1 the first local oscillated signal
L2 the second local oscillated signal
L3 the 3rd local oscillated signal
SO light signal
The SE signal of telecommunication
SLG exemplary electrical signal
SAT satellite antenna
SV perpendicular polarization signal
SH horizontal polarization signal
SVH composite signal
PW supplies power supply
W, W1, W2 plain conductor
Embodiment
Please refer to Fig. 1, the schematic diagram of the satellite TV system 1 that Fig. 1 is the embodiment of the present invention.Satellite TV system 1 includes a satellite antenna SAT, an optical fiber lnb 10, the equipment of flat more than one 18 and a demodulating equipment 19.Satellite antenna SAT is used for receiving high frequency satellite-signal, and high frequency satellite-signal can include perpendicular polarization signal SV and horizontal polarization signal SH.Optical fiber lnb 10 is coupled to satellite antenna SAT, be used for perpendicular polarization signal SV and horizontal polarization signal SH to be converted to the light signal SO of intermediate frequency, and export light signal SO to fiber optic cables by its FC formula connector 102, to be passed to many flats equipment 18.Optical fiber lnb 10 is also coupled to demodulating equipment 19, be used for by perpendicular polarization signal SV and horizontal polarization signal SH be converted to meet typical architecture an exemplary electrical signal SLG(as shown in Figure 2), and export exemplary electrical signal SLG to demodulating equipment 19 by its F formula connector 101, make demodulating equipment 19 can read exemplary electrical signal SLG, to demodulate the contained information of satellite-signal.Demodulating equipment 19 also can be used to a supply power supply PW to be sent to optical fiber lnb 10, to drive the running of optical fiber lnb 10.
It should be noted that optical fiber lnb 10 of the present invention is a composite type optical fibre lnb, it includes known light signal output, and typical signal of telecommunication output is also provided simultaneously.Optical fiber lnb 10 is main by taking out front end satellite-signal after frequency reducing module sub-path wherein, the signal of taking-up is converted to the exemplary electrical signal SLG that meets typical architecture.Under this framework, engineering staff when carrying out dish face with satellite contraposition, can be directly by demodulating equipment 19(for example Set Top Box or monitor instrument) be coupled to F formula connector 101 and read exemplary electrical signal SLG, judge according to this whether successfully the contraposition of satellite disc.Therefore, engineering staff must not go back to the signal of telecommunication by light signal SO, and recycling Set Top Box reads this signal of telecommunication, so can erection & lift Discussing Convenience.Meanwhile, demodulating equipment 19 also exportable supply power supply PW to optical fiber lnb 10, so can save the problem that traditional fiber lnb and Set Top Box need to be found power supply separately.
Circuit structure about optical fiber lnb 10 please refer to Fig. 2, the schematic diagram of the optical fiber lnb 10 that Fig. 2 is the embodiment of the present invention.Optical fiber lnb 10 can be used for a satellite TV system, and it includes one first frequency reducing module 11, one second frequency reducing module 12, one the 3rd frequency reducing module 13, a multiplexer (Diplexer) 17, a gain amplifier 14, one electricity/light conversion device 15, a power supply unit 16, FC formula connector 102 and F formula connector 101.In Fig. 2, the first frequency reducing module 11 and the second frequency reducing module 12 are coupled to satellite antenna SAT, the perpendicular polarization signal SV and the horizontal polarization signal SH frequency reducing that are used for respectively satellite antenna SAT being received become the first intermediate frequency (Intermediate Frequency, IF) signal S1 and one second intermediate-freuqncy signal S2.Multiplexer 17 is coupled to the first frequency reducing module 11 and the second frequency reducing module 12, is used for the first intermediate-freuqncy signal S1 and the second intermediate-freuqncy signal S2 to synthesize a signal of telecommunication SE.Gain amplifier 14 is coupled to multiplexer 17, is used for amplification signal SE.Electricity/light conversion device 15 is coupled between gain amplifier 14 and FC formula connector 102, is used for signal of telecommunication SE to be converted to light signal SO.Power supply unit 16 is coupled to F formula connector 101, is used for receiving a supply power supply PW, to supply the power supply of each assembly in optical fiber lnb 10.The 3rd frequency reducing module 13 includes a first input end IN1 and one second input IN2, first input end IN1 is coupled to the first frequency reducing module 11, the second input IN2 is coupled to the second frequency reducing module 12, be used for drawing part perpendicular polarization signal SV and horizontal polarization signal SH, and by after perpendicular polarization signal SV and horizontal polarization signal SH combination, be converted to an exemplary electrical signal SLG.Then, by F formula connector 101 output exemplary electrical signal SLG.
The first frequency reducing module 11 includes a low noise amplification unit 110, a band pass filter 111, a frequency demultiplier 112 and a gain amplifier 113.Frequency demultiplier 112 includes an oscillator 114, a mixer 115 and a band pass filter 116.The second frequency reducing module 12 includes a low noise amplification unit 120, a band pass filter 121, a frequency demultiplier 122 and a gain amplifier 123.Frequency demultiplier 122 includes an oscillator 124, a mixer 125 and a band pass filter 126.
The first frequency reducing module 11 of take is example, and low noise amplification unit 110 is used for receiving and amplifies perpendicular polarization signal SV.Band pass filter 111 is coupled to low noise amplification unit 110, is used for filtering out high frequency band (10.7～12.75GHz) signal required in perpendicular polarization signal SV.Frequency demultiplier 112 is coupled between band pass filter 111 and gain amplifier 113, is used for the perpendicular polarization signal SV of high frequency to be converted to the first intermediate-freuqncy signal S1, exports according to this gain amplifier 113 to.Gain amplifier 113 is used for amplifying the first intermediate-freuqncy signal S1.In frequency demultiplier 112, oscillator 114 is used for producing one first local oscillated signal L1(9.75GHz).Mixer 115 is coupled to oscillator 114 and band pass filter 111, is used for perpendicular polarization signal SV and the first local oscillated signal L1 to carry out smear.Band pass filter 116 is coupled to mixer 115, and the image frequency being used for after filtering smear, to obtain the first required intermediate-freuqncy signal S1.The second frequency reducing module 12 is used for after horizontal polarization signal SH and the second local oscillated signal L2 smear, and frequency reducing becomes the second intermediate-freuqncy signal S2, and the circuit structure of the second frequency reducing module 12 and operation principles and the first frequency reducing module 11 are similar, are not repeated herein.
The 3rd frequency reducing module 13 includes low noise amplification unit 130 and 131, power divider 137,138 and a frequency demultiplier 132.Power divider 137 is coupled to first input end IN1, is used for drawing part perpendicular polarization signal SV.Low noise amplification unit 130 is coupled to power divider 137, is used for receiving and amplifies perpendicular polarization signal SV.Power divider 138 is coupled to the second input IN2, is used for drawing part of horizontal polarized signal SH.Low noise amplification unit 131 is coupled to power divider 138, is used for receiving and amplifies horizontal polarization signal SH.Low noise amplification unit 130 and 131 is coupled to each other, and perpendicular polarization signal SV and horizontal polarization signal SH is mutually combined, to produce a composite signal SVH.Frequency demultiplier 132 is coupled to low noise amplification unit 130 and 131, is used for composite signal SVH to be converted to exemplary electrical signal SLG.
Frequency demultiplier 132 includes an oscillator 134, a mixer 135, a band pass filter 136 and a gain amplifier 133.Oscillator 134 is used for producing one the 3rd local oscillated signal L3(9.75GHz and 10.6GHz).Mixer 135 is coupled to oscillator 134 and band pass filter 136, is used for composite signal SVH and the 3rd local oscillated signal L3 to carry out smear.Band pass filter 136 is coupled to mixer 135, and the image frequency being used for after filtering smear, to obtain required exemplary electrical signal SLG.Gain amplifier 133 is coupled to band pass filter 136, is used for amplifying exemplary electrical signal SLG.
Following formula be respectively the first frequency reducing module 11, the second frequency reducing module 12 and the 3rd frequency reducing module 13 frequency reducing conversion formula (unit: GHz):
SV（10.7～12.75）-L1（9.75）=S1（0.95～1.95～3.0）；
SH（10.7～12.75）-L2（7.30）=S2（3.40～4.4～5.45）；
SVH（10.7～11.7）-L3（9.75）=SLG（0.95～1.95）；
SVH（11.7～12.75）-L3（10.6）=SLG（1.1～2.15）。
Wherein, the first intermediate-freuqncy signal S1 includes low-frequency band perpendicular polarization signal (Vertical Low, VL) and high frequency band perpendicular polarization signal (Vertical High, VH); The second intermediate-freuqncy signal S2 includes low-frequency band horizontal polarization signal (Horizontal Low, HL) and high frequency band horizontal polarization signal (Horizontal High, HH); Exemplary electrical signal SLG includes high and low frequency band perpendicular polarization signal, and high and low frequency band horizontal polarization signal.Following table is listed the operating voltage (unit: GHz) of frequency and the corresponding circuits of each frequency band polarized signal.
Because the size of its circuit voltage is depended in the running of typical architecture, so adjust the direct voltage size of supply power supply PW and the running that ac voltage signal can be controlled optical fiber lnb 10.Specifically, engineering staff is in carrying out the process of dish face and satellite contraposition, can directly input supply power supply PW to optical fiber lnb 10 by Set Top Box, by direct voltage size and the ac voltage signal of adjusting supply power supply PW, control the open and close of the low noise amplification unit 130,131 in the 3rd frequency reducing module 13, to control respectively perpendicular polarization signal SV and horizontal polarization signal SH enters the 3rd frequency reducing module 13.Meanwhile, Set Top Box also can read exemplary electrical signal SLG by F formula connector 101, judges that whether contraposition is successful.For instance, when Set Top Box is inputted the supply voltage PW of 13 volts to optical fiber lnb 10, the exemplary electrical signal SLG of the 3rd frequency reducing module 13 outputs is high frequency band perpendicular polarization signal (1.1～2.15GHz); When Set Top Box is inputted the supply voltage PW of 18 volts to optical fiber lnb 10, exemplary electrical signal SLG is low-frequency band horizontal polarization signal HL(0.95～1.95GHz); The supply voltage PW that inputs 18 volts and 22KHz when Set Top Box is during to optical fiber lnb 10, and exemplary electrical signal SLG is high frequency band horizontal polarization signal HH(1.1～2.15GHz).
In simple terms, optical fiber lnb 10 of the present invention can utilize that the 3rd frequency reducing module 13 is drawn vertically, horizontal polarization signal convert it to the exemplary electrical signal SLG of intermediate frequency.Simultaneously, can utilize the typical signal of telecommunication of F formula connector 101 output to Set Top Box, and input supply power supply PW to optical fiber lnb 10 by Set Top Box, make direct voltage size and the a-c cycle of changeable its supply power supply of Set Top Box PW, to control the running of the 3rd frequency reducing module 13 and the output of exemplary electrical signal SLG.Thus, when carrying out dish face and satellite contraposition, engineering staff can utilize Set Top Box to read exemplary electrical signal, judge contraposition whether success and instant surveillance satellite signal quality and signal stabilization degree etc., and save the power supply that needs traditionally to seek respectively optical fiber lnb 10 and demodulating equipment 19.
Note that embodiments of the present invention are not limited to this embodiment, those of ordinary skill in the art should change according to this and modify, as long as aim according to the invention.For instance, the form of power divider 137,138 is not limit, and as shown in Figure 3, Fig. 3 is the schematic diagram of power divider 137.Power divider 137, on the signal path of perpendicular polarization signal SV, by plain conductor W1, W2 and parallel resistance between the two, is equally divided into two tunnels by the signal power of perpendicular polarization signal SV.
Power divider 137,138 also can be realized by a coupling circuit, and as shown in Figure 4, Fig. 4 is the schematic diagram of a coupling circuit 437.Coupling circuit 437 on the signal path of perpendicular polarization signal SV, the plain conductor W that be arranged in parallel, direct-coupling perpendicular polarization signal SV, then it is inputed to low noise amplification unit 130, to amplify the perpendicular polarization signal SV drawing out.
Low noise amplification unit 110,120,130,131 can include at least one low noise amplifier, is used to provide the signal amplifying function of different brackets, and designer can, according to actual demand, adjust the quantity of low noise amplifier.As shown in Figure 5, Fig. 5 is the schematic diagram of a low noise amplification unit 110.Low noise amplification unit 110 includes low noise amplifier 511,512 and 513, and being used for provides three grades of signal amplifying functions to input signal.
On the other hand, the 3rd frequency reducing module 13 is mainly drawn part perpendicular polarization signal SV and horizontal polarization signal SH, therefore the first input end IN1 of the 3rd frequency reducing module 13 can be coupled on the signal path between satellite antenna SAT and the frequency demultiplier 112 of the first frequency reducing module 11, and the second input IN2 can be coupled on the signal path between satellite antenna SAT and the frequency demultiplier 122 of the second frequency reducing module 12.For example, first input end IN1 can be coupled between satellite antenna SAT and low noise amplification unit 110, between low noise amplification unit 110 and band pass filter 111 or between band pass filter 111 and mixer 115.The second input IN2 can be coupled between satellite antenna SAT and low noise amplification unit 120, between low noise amplification unit 120 and band pass filter 121 or between band pass filter 121 and mixer 125.
In sum, optical fiber lnb of the present invention is a kind of composite type optical fibre lnb, and it includes known light signal output, and exemplary electrical signal output is also provided simultaneously.Optical fiber lnb mainly, by taking out front end satellite-signal after frequency reducing module sub-path wherein, is converted to the signal of taking-up the exemplary electrical signal that meets typical architecture.Under this framework, engineering staff, when carrying out dish face and satellite contraposition, can directly for example, be coupled to F formula connector 101 by demodulating equipment (Set Top Box or supervision instrument) and read exemplary electrical signal, judges that according to this whether the contraposition of satellite disc is successful.Therefore, engineering staff must not go back to the signal of telecommunication by light signal, and recycling Set Top Box reads this signal of telecommunication, so can erection & lift Discussing Convenience.In addition, typical signal of telecommunication output yet can provide signal quality to monitor, or other users' satellite reception information, so also promotes the surcharge of optical fiber lnb.On the other hand, demodulating equipment also exportable supply power supply to optical fiber lnb, and by adjusting the direct voltage size of supply power supply and the running that ac voltage signal is controlled optical fiber lnb, so can save the problem that traditional fiber lnb and demodulating equipment need to be found power supply separately.Under framework of the present invention, dish face erection method is identical with traditional erection mode, can effectively reduce inconvenience, acceleration installation effectiveness that optical fiber lnb dish is installed in the face of position.
The foregoing is only preferred embodiment of the present invention, every equivalent variations of doing according to the scope of the claims in the present invention book and modification, all should belong to covering scope of the present invention.
Claims (20)
1. an optical fiber lnb, this optical fiber lnb is for a satellite TV system, and this optical fiber lnb comprises:
One first frequency reducing module, this first frequency reducing module is coupled to a satellite antenna of this satellite TV system, and a perpendicular polarization signal that is used for this satellite antenna to receive is converted to one first intermediate-freuqncy signal;
One second frequency reducing module, this second frequency reducing module is coupled to this satellite antenna, and a horizontal polarization signal that is used for this satellite antenna to receive is converted to one second intermediate-freuqncy signal; And
One the 3rd frequency reducing module, the 3rd frequency reducing module comprises a first input end and one second input, this first input end is coupled between this satellite antenna and one first frequency demultiplier of this first frequency reducing module, this second input is coupled between this satellite antenna and one second frequency demultiplier of this second frequency reducing module, be used for drawing this perpendicular polarization signal of part and this horizontal polarization signal and by after this perpendicular polarization signal and this horizontal polarization signal combination, be converted to an exemplary electrical signal.
2. optical fiber lnb as claimed in claim 1, wherein this first frequency reducing module comprises:
One low noise amplification unit, this low noise amplification unit is coupled to this satellite antenna, and this low noise amplification unit comprises at least one low noise amplifier, and this at least one low noise amplifier is used to provide at least one stage signal and amplifies;
One band pass filter, this band pass filter is coupled between this low noise amplification unit and this first frequency demultiplier, is used for this perpendicular polarization signal to carry out filtering, and by this first frequency demultiplier, this perpendicular polarization signal is converted to this first intermediate-freuqncy signal; And
One gain amplifier, this gain amplifier is coupled to this first frequency demultiplier, is used for amplifying this first intermediate-freuqncy signal.
3. optical fiber lnb as claimed in claim 2, wherein this first frequency demultiplier comprises:
One oscillator, this oscillator is used for producing one first local oscillated signal;
One mixer, this mixer is coupled to this oscillator, is used for this perpendicular polarization signal and this first local oscillated signal to carry out smear; And
One band pass filter, this band pass filter is coupled to this mixer, is used for this perpendicular polarization signal after smear to carry out filtering, so that this perpendicular polarization signal is converted to this first intermediate-freuqncy signal.
4. optical fiber lnb as claimed in claim 1, wherein this second frequency reducing module comprises:
One low noise amplification unit, this low noise amplification unit is coupled to this satellite antenna, and this low noise amplification unit comprises at least one low noise amplifier, and this at least one low noise amplifier is used to provide at least one stage signal and amplifies;
One band pass filter, this band pass filter is coupled between this low noise amplification unit and this second frequency demultiplier, is used for this horizontal polarization signal to carry out filtering, and by this second frequency demultiplier, this horizontal polarization signal is converted to this second intermediate-freuqncy signal; And
One gain amplifier, this gain amplifier is coupled to this second frequency demultiplier, is used for amplifying this second intermediate-freuqncy signal.
5. optical fiber lnb as claimed in claim 4, wherein this second frequency demultiplier comprises:
One oscillator, this oscillator is used for producing one second local oscillated signal;
One mixer, this mixer is coupled to this oscillator, is used for this horizontal polarization signal and this second local oscillated signal to carry out smear; And
One band pass filter, this band pass filter is coupled to this mixer, is used for this horizontal polarization signal after smear to carry out filtering, so that this horizontal polarization signal is converted to this second intermediate-freuqncy signal.
6. optical fiber lnb as claimed in claim 1, wherein the 3rd frequency reducing module comprises:
One first low noise amplifier, this first low noise amplifier is coupled to this first input end, is used for receiving and amplifies this perpendicular polarization signal;
One second low noise amplifier, this second low noise amplifier is coupled to this second input, is used for receiving and amplifies this horizontal polarization signal; And
One the 3rd frequency demultiplier, the 3rd frequency demultiplier is coupled to this first, second low noise amplifier, and to receive a composite signal of this perpendicular polarization signal and this horizontal polarization signal combination, this 3rd frequency demultiplier comprises:
One oscillator, this oscillator is used for producing one the 3rd local oscillated signal;
One mixer, this mixer is coupled to this oscillator, is used for this composite signal and the 3rd local oscillated signal to carry out smear;
One band pass filter, this band pass filter is coupled to this mixer, is used for this composite signal after smear to carry out filtering, so that this composite signal is converted to this exemplary electrical signal; And
One gain amplifier, this gain amplifier is coupled to this band pass filter, is used for amplifying this exemplary electrical signal.
7. optical fiber lnb as claimed in claim 6, wherein the 3rd frequency reducing module also comprises a plurality of power dividers, the plurality of power divider is coupled to this first, second input, is used for drawing respectively this perpendicular polarization signal of part and this horizontal polarization signal.
8. optical fiber lnb as claimed in claim 6, wherein the 3rd frequency reducing module also comprises a plurality of coupling circuits, the plurality of coupling circuit is coupled to this first, second input, is used for drawing respectively this perpendicular polarization signal of part and this horizontal polarization signal.
9. optical fiber lnb as claimed in claim 1, this optical fiber lnb also comprises:
One multiplexer, this multiplexer is coupled to this first, second frequency reducing module, is used for synthesizing this first, second intermediate-freuqncy signal, to produce a signal of telecommunication;
One gain amplifier, this gain amplifier is coupled to this multiplexer, is used for amplifying this signal of telecommunication; And
One electricity/light conversion device, this electricity/light conversion device is coupled to this gain amplifier, is used for this signal of telecommunication to be converted to a light signal, exports a FC formula connector to, to transmit by a Connectorized fiber optic cabling.
10. optical fiber lnb as claimed in claim 1, this optical fiber lnb also comprises a power supply unit, this power supply unit is coupled to a F formula connector, be used for receiving the direct voltage that a demodulating equipment of this satellite system provides, for power supply that should optical fiber lnb, and this F formula connector is also coupled to the 3rd frequency reducing module, be used for exporting this exemplary electrical signal, for this demodulating equipment, read this exemplary electrical signal, to control the running of this optical fiber lnb.
11. 1 kinds of satellite TV systems, this satellite TV system comprises:
One satellite antenna, this satellite antenna is used for receiving a perpendicular polarization signal and a horizontal polarization signal;
One optical fiber lnb, this optical fiber lnb comprises:
One first frequency reducing module, this first frequency reducing module is coupled to this satellite antenna, is used for this perpendicular polarization signal to be converted to one first intermediate-freuqncy signal;
One second frequency reducing module, this second frequency reducing module is coupled to this satellite antenna, is used for this horizontal polarization signal to be converted to one second intermediate-freuqncy signal; And
One the 3rd frequency reducing module, the 3rd frequency reducing module comprises a first input end and one second input, this first input end is coupled between this satellite antenna and one first frequency demultiplier of this first frequency reducing module, this second input is coupled between this satellite antenna and one second frequency demultiplier of this second frequency reducing module, be used for drawing this perpendicular polarization signal of part and this horizontal polarization signal and by after this perpendicular polarization signal and this horizontal polarization signal combination, be converted to an exemplary electrical signal; And
One demodulating equipment, this demodulating equipment is coupled to this optical fiber lnb, is used for the running of reading exemplary electrical signal and controlling this optical fiber lnb.
12. satellite TV systems as claimed in claim 11, wherein this first frequency reducing module comprises:
One low noise amplification unit, this low noise amplification unit is coupled to this satellite antenna, and this low noise amplification unit comprises at least one low noise amplifier, and this at least one low noise amplifier is used to provide at least one stage signal and amplifies;
One band pass filter, this band pass filter is coupled between this low noise amplification unit and this first frequency demultiplier, is used for this perpendicular polarization signal to carry out filtering, and by this first frequency demultiplier, this perpendicular polarization signal is converted to this first intermediate-freuqncy signal; And
One gain amplifier, this gain amplifier is coupled to this first frequency demultiplier, is used for amplifying this first intermediate-freuqncy signal.
13. satellite TV systems as claimed in claim 12, wherein this first frequency demultiplier comprises:
One oscillator, this oscillator is used for producing one first local oscillated signal;
One mixer, this mixer is coupled to this oscillator, is used for this perpendicular polarization signal and this first local oscillated signal to carry out smear; And
One band pass filter, this band pass filter is coupled to this mixer, is used for this perpendicular polarization signal after smear to carry out filtering, so that this perpendicular polarization signal is converted to this first intermediate-freuqncy signal.
14. satellite TV systems as claimed in claim 11, wherein this second frequency reducing module comprises:
One low noise amplification unit, this low noise amplification unit is coupled to this satellite antenna, and this low noise amplification unit comprises at least one low noise amplifier, and this at least one low noise amplifier is used to provide at least one stage signal and amplifies;
One band pass filter, this band pass filter is coupled between this low noise amplification unit and this second frequency demultiplier, is used for this horizontal polarization signal to carry out filtering, and by this second frequency demultiplier, this horizontal polarization signal is converted to this second intermediate-freuqncy signal; And
One gain amplifier, this gain amplifier is coupled to this second frequency demultiplier, is used for amplifying this second intermediate-freuqncy signal.
15. satellite TV systems as claimed in claim 14, wherein this second frequency demultiplier comprises:
One oscillator, this oscillator is used for producing one second local oscillated signal;
One mixer, this mixer is coupled to this oscillator, is used for this horizontal polarization signal and this second local oscillated signal to carry out smear; And
One band pass filter, this band pass filter is coupled to this mixer, is used for this horizontal polarization signal after smear to carry out filtering, so that this horizontal polarization signal is converted to this second intermediate-freuqncy signal.
16. satellite TV systems as claimed in claim 11, wherein the 3rd frequency reducing module comprises:
One first low noise amplifier, this first low noise amplifier is coupled to this first input end, is used for receiving and amplifies this perpendicular polarization signal;
One second low noise amplifier, this second low noise amplifier is coupled to this second input, is used for receiving and amplifies this horizontal polarization signal; And
One the 3rd frequency demultiplier, the 3rd frequency demultiplier is coupled to this first, second low noise amplifier, and to receive a composite signal of this perpendicular polarization signal and this horizontal polarization signal combination, the 3rd frequency demultiplier comprises:
One oscillator, this oscillator is used for producing one the 3rd local oscillated signal;
One mixer, this mixer is coupled to this oscillator, is used for this composite signal and the 3rd local oscillated signal to carry out smear;
One band pass filter, this band pass filter is coupled to this mixer, is used for this composite signal after smear to carry out filtering, so that this composite signal is converted to this exemplary electrical signal; And
One gain amplifier, this gain amplifier is coupled to this band pass filter, is used for amplifying this exemplary electrical signal.
17. satellite TV systems as claimed in claim 16, wherein the 3rd frequency reducing module also comprises a plurality of power dividers, the plurality of power divider is coupled to this first, second input, is used for drawing respectively this perpendicular polarization signal of part and this horizontal polarization signal.
18. satellite TV systems as claimed in claim 16, wherein the 3rd frequency reducing module also comprises a plurality of coupling circuits, the plurality of coupling circuit is coupled to this first, second input, is used for drawing respectively this perpendicular polarization signal of part and this horizontal polarization signal.
19. satellite TV systems as claimed in claim 11, wherein this optical fiber lnb also comprises:
One multiplexer, this multiplexer is coupled to this first, second frequency reducing module, is used for synthesizing this first, second intermediate-freuqncy signal, to produce a signal of telecommunication;
One gain amplifier, this gain amplifier is coupled to this multiplexer, is used for amplifying this signal of telecommunication; And
One electricity/light conversion device, this electricity/light conversion device is coupled to this gain amplifier, is used for this signal of telecommunication to be converted to a light signal, exports a FC formula connector to, to transmit by a Connectorized fiber optic cabling.
20. satellite TV systems as claimed in claim 11, wherein this optical fiber lnb also comprises a power supply unit, this power supply unit is coupled to a F formula connector, be used for receiving a direct voltage, for power supply that should optical fiber lnb, and this F formula connector is also coupled to the 3rd frequency reducing module, is used for exporting this exemplary electrical signal, for this demodulating equipment, reads this exemplary electrical signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210375833.7A CN103715989B (en) | 2012-09-29 | 2012-09-29 | Optical fiber low-noise frequency and satellite TV system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210375833.7A CN103715989B (en) | 2012-09-29 | 2012-09-29 | Optical fiber low-noise frequency and satellite TV system |
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| CN103715989A true CN103715989A (en) | 2014-04-09 |
| CN103715989B CN103715989B (en) | 2016-06-22 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM261922U (en) * | 2004-09-20 | 2005-04-11 | Prime Electronics & Satellitics Inc | A low noise block downconverter of C-band and Ku-band |
| EP1181787B1 (en) * | 1999-08-30 | 2008-04-16 | Hughes Electronics Corporation | Single-lnb satellite data receiver |
| CN101366198A (en) * | 2006-01-25 | 2009-02-11 | 艾利森电话股份有限公司 | Method and apparatus for reducing combiner loss in a multi-sector, omni-base station |
| CN102255659A (en) * | 2010-05-17 | 2011-11-23 | 启碁科技股份有限公司 | Optical low-noise block downconverter, multi-dwelling unit equipment and related satellite television system |
| CN102468882A (en) * | 2010-11-12 | 2012-05-23 | 启碁科技股份有限公司 | Optical fiber low-noise frequency reducer capable of being quickly aligned |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW534542U (en) * | 2002-01-29 | 2003-05-21 | Prime Electronics & Satellitics Inc | Structure for preventing cross-modulation interference of satellite transmission |
-
2012
- 2012-09-29 CN CN201210375833.7A patent/CN103715989B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1181787B1 (en) * | 1999-08-30 | 2008-04-16 | Hughes Electronics Corporation | Single-lnb satellite data receiver |
| TWM261922U (en) * | 2004-09-20 | 2005-04-11 | Prime Electronics & Satellitics Inc | A low noise block downconverter of C-band and Ku-band |
| CN101366198A (en) * | 2006-01-25 | 2009-02-11 | 艾利森电话股份有限公司 | Method and apparatus for reducing combiner loss in a multi-sector, omni-base station |
| CN102255659A (en) * | 2010-05-17 | 2011-11-23 | 启碁科技股份有限公司 | Optical low-noise block downconverter, multi-dwelling unit equipment and related satellite television system |
| CN102468882A (en) * | 2010-11-12 | 2012-05-23 | 启碁科技股份有限公司 | Optical fiber low-noise frequency reducer capable of being quickly aligned |
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|---|---|
| CN103715989B (en) | 2016-06-22 |
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