CN102468882B - Optical fiber low-noise frequency reducer capable of being quickly aligned - Google Patents
Optical fiber low-noise frequency reducer capable of being quickly aligned Download PDFInfo
- Publication number
- CN102468882B CN102468882B CN201010541827.5A CN201010541827A CN102468882B CN 102468882 B CN102468882 B CN 102468882B CN 201010541827 A CN201010541827 A CN 201010541827A CN 102468882 B CN102468882 B CN 102468882B
- Authority
- CN
- China
- Prior art keywords
- signal
- optical fiber
- frequency
- freuqncy signal
- lnb
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The invention provides an optical fiber low-noise frequency reducer capable of being quickly aligned. The optical fiber low-noise frequency reducer is used in a wave collector of a satellite antenna system. The optical fiber low-noise frequency reducer comprises a frequency reducer, a branching device, an electric/optic converter and a power end, wherein the frequency reducer is coupled to an orthogonal mode converter of the wave collector, and is used for reducing the frequency of a polarization signal to generate a first intermediate-frequency signal; the branching device is used for branching the first intermediate-frequency signal to generate a second intermediate-frequency signal and a third intermediate-frequency signal; the electric/optic converter is coupled to the branching device for converting the second intermediate-frequency signal to an optic signal; and the power end is used for receiving electric energy and outputting the third intermediate-frequency signal. Therefore, an engineer can convert the optic signal to the electric signal during aligning without needing a plurality of residential unit equipment and can directly read the intermediate-frequency signals output by the wave collector by a demodulating device to judge whether the aligning is successful or not, so that the optical fiber low-noise frequency reducer is more convenient for the engineer.
Description
Technical field
The present invention relates to a kind of satellite antenna system, more particularly, relate to a kind of optical fiber lnb that can rapid-aligning.
Background technology
Because satellite communication has communication distance far and the extremely wide characteristic of covering scope, satellite communication is widely used in many fields, such as radio and television, communication etc.Therefore, though in bleak and desolate desert or vastness marine greatly, as long as set up reception antenna, just can receive satellite-signal.
Please refer to Fig. 1, Fig. 1 is the schematic diagram of a known satellite antenna system 100 in the time of contraposition.Satellite antenna system 100 includes a satellite disc 110, a wave collecting device (Low Noise Block Down-converter with Integrated Feed, LNBF) 120, and power supply 130.The satellite-signal that wave collecting device 120 mainly receives satellite disc 110, polarizes, then frequency reducing is intermediate-freuqncy signal, and then intermediate-freuqncy signal is converted to light signal and by fiber optic cables, output optical signal.Power supply 130, by coaxial cable, provides power supply to wave collecting device 120.Traditionally, system dealer, in the time that satellite disc 110 is installed with satellite contraposition, must utilize many flats equipment 140, the light signal that wave collecting device 120 is exported, convert the signal of telecommunication to, then send the signal of telecommunication to demodulating equipment (being Set Top Box, Set-Top Box) 150.So, the signal that the engineering staff of execution contraposition could export from demodulating equipment 150, judges that whether contraposition is successful.But satellite antenna system 100 is generally positioned 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 140.So require for engineering staff, will improve the degree of difficulty of carrying out contraposition, and the time that makes satellite antenna system 100 complete contraposition is elongated.
Therefore, need to provide a kind of optical fiber lnb that can rapid-aligning, to address the above problem.
Summary of the invention
The invention provides a kind of optical fiber lnb that can rapid-aligning, for a wave collecting device of a satellite antenna system, this optical fiber lnb comprises a lowering freqyency device, this lowering freqyency device is coupled to an orthogonal modes transducer of this wave collecting device, be used for a polarized signal frequency reducing, to produce one first intermediate-freuqncy signal; One branch unit, this branch unit is used for this first intermediate-freuqncy signal of branch, to produce one second and 1 the 3rd intermediate-freuqncy signal; One electricity/light conversion device, this electricity/light conversion device is coupled to this branch unit, is used for this second intermediate-freuqncy signal to be converted to light signal; And a power end, this power end is used for receiving electric energy and exports the 3rd intermediate-freuqncy signal.
By satellite antenna system of the present invention, can make engineering staff in the time of contraposition, do not need again by many flats equipment, transfer light signal to the signal of telecommunication, and can directly read by demodulating equipment the intermediate-freuqncy signal that wave collecting device is exported, to judge whether success of contraposition, so so that engineering staff to be provided larger convenience when the contraposition.
Brief description of the drawings
Fig. 1 is the schematic diagram of a known satellite antenna system in the time of contraposition.
Fig. 2 is the schematic diagram of a satellite antenna system in the time of contraposition that can rapid-aligning of the present invention.
Fig. 3 is the functional-block diagram of the wave collecting device of satellite antenna system.
Fig. 4 is the schematic diagram of an embodiment of lowering freqyency device in Fig. 3.
Fig. 5 A to Fig. 5 G is the schematic diagram of the different embodiment of branch unit in Fig. 4.
Primary clustering symbol description:
100,200 satellite antenna systems
110,210 satellite discs
120,220 wave collecting devices
130,230 power supplys
140, the equipment of flat more than 240
150,250 demodulating equipments
310 orthogonal modes transducers
320 lowering freqyency devices
330 branch units
340 electricity/light conversion device
360 F type connectors
400 optical fiber lnbs
430 wave multiplexers
440,416,426 amplifiers
411,421 low noise amplifiers
412,422,415,425 band pass filters
413,423 frequency mixers
414,424 oscillators
B
1, B
2frequency down circuit
N
1, N
2node
S
r, S
r1, S
r2, S
rV, S
rHintermediate-freuqncy signal
S
ssatellite-signal
S
h, S
vpolarized signal
S
olight signal
Embodiment
Please refer to Fig. 2.Fig. 2 is the schematic diagram of a satellite antenna system 200 in the time of contraposition that can rapid-aligning of the present invention.Satellite antenna system 200 includes a satellite disc 210 and a wave collecting device 220.Wave collecting device 220 is by its power end and coaxial cable, receive the electric energy transmitting from demodulating equipment 250, polarize with the satellite-signal that satellite disc 210 is received, then frequency reducing is intermediate-freuqncy signal, and then intermediate-freuqncy signal is converted to light signal and passes through fiber optic cables, output optical signal.In addition, wave collecting device 220 is also directly by the intermediate-freuqncy signal after frequency reducing, by its power end and coaxial cable output.Therefore, system dealer is in the time installing satellite disc 210 with satellite contraposition, and the intermediate-freuqncy signal that just can directly wave collecting device 220 be transmitted by coaxial cable, sends demodulating equipment 250 to; And the signal that the engineering staff who carries out contraposition just can directly export from demodulating equipment 250 judges that whether contraposition is successful, and do not need to carry out opto-electronic conversion by many flats equipment.
In simple terms, in satellite antenna system 200, because wave collecting device 220 can be directly by the intermediate-freuqncy signal after frequency reducing, by its power end and coaxial cable output, the signal that therefore engineering staff just can directly export from demodulating equipment 250, judges that whether contraposition is successful.In this case, do not need to carry out opto-electronic conversion by many flats equipment, the more important thing is, engineering staff can carry out contraposition more expediently, increases efficiency.
Please continue to refer to Fig. 3.Fig. 3 is the functional-block diagram of the wave collecting device 220 of satellite antenna system 200.As shown in Figure 3, wave collecting device 220 comprises an orthogonal modes transducer (Orthomode Transducer, OMT) 310, a lowering freqyency device 320, a branch unit 330 and one electricity/light conversion device 340.In addition, wave collecting device 220 comprises a horn antenna (feedhorn), is used for collecting the satellite-signal that satellite disc 210 receives.Orthogonal modes transducer 310 is by satellite-signal S
sbe separated into perpendicular polarization signal S
vand horizontal polarization signal S
h.Lowering freqyency device 320 is by perpendicular polarization signal S
vand horizontal polarization signal S
hbe downconverted to the intermediate-freuqncy signal S of a predetermined frequency band
r.Branch unit 330 is by intermediate-freuqncy signal S
rbranch into intermediate-freuqncy signal S
r1with S
r2.Intermediate-freuqncy signal S
r1with S
r2all with intermediate-freuqncy signal S
ridentical, intermediate-freuqncy signal S wherein
r1be used to provide to electricity/light conversion device 340, to be converted to light signal S
o, and export fiber optic cables to; And intermediate-freuqncy signal S
r2export coaxial cable to by a F type connector 360, engineering staff can be connected in demodulating equipment 250 to be loaded with intermediate-freuqncy signal S
r2coaxial cable, to carry out contraposition.In addition, preferably, intermediate-freuqncy signal S
r2be loaded on the coaxial cable that wave collecting device 220 and power supply 130 link.
Should be noted, Fig. 3 illustrates the function of wave collecting device 220, and in detail implementation should be required and suitably adjust according to system.For instance, please refer to Fig. 4.Fig. 4 is the schematic diagram of an embodiment of lowering freqyency device 320 in Fig. 3.As shown in Figure 4, lowering freqyency device 320 comprises two frequency down circuit B
1with B
2, a wave multiplexer (IF diplexer) 430 and an amplifier 440.Frequency down circuit B
1with B
2be used for respectively perpendicular polarization signal S
vwith horizontal polarization signal S
hbe downconverted to a predetermined frequency band (as 0.95GHz～1.95GHz～3.0GHz and 3.4GHz～4.4GHz～5.45GHz).More particularly, at frequency down circuit B
1in, perpendicular polarization signal S
vthe band pass filter 412 that is 10.7～12.75GHz by low noise amplifier 411 and passband (Passband), then the 9.75GHz oscillator signal producing by frequency mixer 413 and oscillator 414 carries out mixing, the band pass filter 415 that is finally 0.95～3GHz by passband and intermediate frequency amplifier 416, be output as an intermediate-freuqncy signal S
rV.At frequency down circuit B
2in, horizontal polarization signal S
hthe band pass filter 422 that is 10.7～12.75GHz by low noise amplifier 421 and passband, then the 7.3GHz oscillator signal producing by frequency mixer 423 and oscillator 424 carries out mixing, the band pass filter 425 that is finally 3.4～5.45GHz by passband and intermediate frequency amplifier 426, be output as an intermediate-freuqncy signal S
rH.Wave multiplexer 430 is used for frequency down circuit B
1with B
2intermediate-freuqncy signal S after frequency reducing
rV, S
rHin conjunction with, and send amplifier 440 to and amplify, to export intermediate-freuqncy signal S
rgive branch unit 330.
In addition, for improving product integrality, also lowering freqyency device 320, electricity/light conversion device 340 and branch unit 330 can be combined into an optical fiber lnb (Optical Low Noise Block Down-converter, Optical LNB) 400.In this case, optical fiber lnb 400 not only has frequency-dropping function and the intermediate-freuqncy signal after frequency reducing is converted to the function of light signal with output, also can, by the intermediate-freuqncy signal after frequency reducing, directly export by its power end, to provide engineering staff to carry out contraposition use.
In addition, in the present invention, the set-up mode of branch unit 330 also can have different variation.Do contraposition to engineering staff and use owing to being used to provide by 330 branches of branch unit signal out, and in fact in Fig. 4, intermediate-freuqncy signal S
rVor S
rHcan offer engineering staff and do contraposition use.Therefore, branch unit 330 also can be arranged at node N
1or N
2, and by intermediate-freuqncy signal S
rVor S
rHbranch, carries out contraposition use to offer engineering staff.
On the other hand, branch unit 330 is used for to intermediate-freuqncy signal S
rshunt, its implementation is also by industry is known.For instance, please refer to Fig. 5 A to Fig. 5 G.Fig. 5 A to Fig. 5 G is the schematic diagram of the different embodiment of branch unit 330 in Fig. 4, and it is sequentially direct-coupling device (direct coupler), T-shaped power divider (power divider), resistor-type power divider, the gloomy power divider of Vygen (Wilkinson power divider), 90 degree differ mixed power divider (quadrature hybrid power divider) and 180 degree differ mixed power divider (ring hybrid power divider).Should be noted, Fig. 5 A to Fig. 5 G is only used for illustrating the possible implementation of branch unit 330, is not limited to this, and designer should be according to the required suitable selection of system or design branch unit 330.
In sum, by satellite antenna system of the present invention, can make engineering staff in the time of contraposition, do not need again by many flats equipment, transfer light signal to the signal of telecommunication, and can directly read by demodulating equipment the intermediate-freuqncy signal that wave collecting device is exported, to judge whether success of contraposition, so so that engineering staff to be provided larger convenience when the contraposition.
The foregoing is only preferred embodiment of the present invention, every equalization of doing according to the scope of the claims in the present invention book changes and modifies, and all should belong to covering scope of the present invention.
Claims (6)
1. an optical fiber lnb that can rapid-aligning, for a wave collecting device of a satellite antenna system, this optical fiber lnb comprises:
One lowering freqyency device, this lowering freqyency device is coupled to an orthogonal modes transducer of this wave collecting device, is used for a polarized signal frequency reducing, to produce one first intermediate-freuqncy signal;
One branch unit, this branch unit is used for this first intermediate-freuqncy signal of branch, to produce one second and 1 the 3rd intermediate-freuqncy signal;
One electricity/light conversion device, this electricity/light conversion device is coupled to this branch unit, is used for this second intermediate-freuqncy signal to be converted to light signal and to export fiber optic cables to; And
One power end, this power end is used for receiving electric energy and exports the 3rd intermediate-freuqncy signal;
Wherein, directly read this wave collecting device and directly export to the 3rd intermediate-freuqncy signal of coaxial cable by a demodulating equipment;
Wherein, this is second identical with this first intermediate-freuqncy signal with the 3rd intermediate-freuqncy signal.
2. optical fiber lnb as claimed in claim 1, wherein this polarized signal is a perpendicular polarization signal or a horizontal polarization signal.
3. optical fiber lnb as claimed in claim 1, wherein this polarized signal comprises a perpendicular polarization signal and a horizontal polarization signal, this lowering freqyency device comprises:
One first frequency down circuit, this first frequency down circuit is used for this perpendicular polarization signal to carry out frequency reducing, to export one the 4th intermediate-freuqncy signal;
One second frequency down circuit, this second frequency down circuit is used for this horizontal polarization signal to carry out frequency reducing, to export one the 5th intermediate-freuqncy signal; And
One wave multiplexer, this wave multiplexer is coupled to this first frequency down circuit, this second frequency down circuit and this branch unit, be used in conjunction with the 4th with the 5th intermediate-freuqncy signal, to produce this first intermediate-freuqncy signal.
4. optical fiber lnb as claimed in claim 3, wherein this lowering freqyency device also comprises an amplifier, is coupled between this wave multiplexer and this branch unit.
5. optical fiber lnb as claimed in claim 3, wherein the frequency band of the 4th intermediate-freuqncy signal is approximately between between 0.95GHz to 3.0GHz, and the frequency band of the 5th intermediate-freuqncy signal is approximately between between 3.4GHz to 5.45GHz.
6. optical fiber lnb as claimed in claim 1, wherein this branch unit is direct-coupling device, T-shaped power divider, resistor-type power divider, the gloomy power divider of Vygen, 90 degree differ mixed power divider or 180 degree differ mixed power divider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010541827.5A CN102468882B (en) | 2010-11-12 | 2010-11-12 | Optical fiber low-noise frequency reducer capable of being quickly aligned |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010541827.5A CN102468882B (en) | 2010-11-12 | 2010-11-12 | Optical fiber low-noise frequency reducer capable of being quickly aligned |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102468882A CN102468882A (en) | 2012-05-23 |
| CN102468882B true CN102468882B (en) | 2014-09-10 |
Family
ID=46072115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010541827.5A Active CN102468882B (en) | 2010-11-12 | 2010-11-12 | Optical fiber low-noise frequency reducer capable of being quickly aligned |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102468882B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715989B (en) * | 2012-09-29 | 2016-06-22 | 启碁科技股份有限公司 | Optical fiber low-noise frequency and satellite TV system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2786867Y (en) * | 2004-10-15 | 2006-06-07 | 台扬科技股份有限公司 | Full frequency section simultaneous output low noise frequency demultiplier |
| CN101557507A (en) * | 2008-04-09 | 2009-10-14 | 台扬科技股份有限公司 | Low-noise frequency demultiplier and outdoor receiving device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070075909A1 (en) * | 2005-10-03 | 2007-04-05 | Andrew Corporation | Integrated Satellite Communications Outdoor Unit |
-
2010
- 2010-11-12 CN CN201010541827.5A patent/CN102468882B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2786867Y (en) * | 2004-10-15 | 2006-06-07 | 台扬科技股份有限公司 | Full frequency section simultaneous output low noise frequency demultiplier |
| CN101557507A (en) * | 2008-04-09 | 2009-10-14 | 台扬科技股份有限公司 | Low-noise frequency demultiplier and outdoor receiving device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102468882A (en) | 2012-05-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8351796B2 (en) | Optical low-noise block downconverter, multiple dwelling unit, and related satellite television system | |
| CN102468882B (en) | Optical fiber low-noise frequency reducer capable of being quickly aligned | |
| CN201114052Y (en) | Ku double local oscillation multi-output system | |
| TWI449344B (en) | Optical lnb capable of fast position adjusting | |
| CN103501204B (en) | A kind of X-band power output telemetry-acquisition device | |
| CN203800933U (en) | Wideband KU wave band dual output satellite down converter | |
| JP2001016128A (en) | Converter for two satellite receiving antenna | |
| CN103179388A (en) | Matrix receiving method and device for multiple satellite digital television signals | |
| CN114710175B (en) | Radio astronomical normal temperature receiver device | |
| TWI514785B (en) | Optical low-noise block down-converter and satellite television system | |
| US8989323B2 (en) | Single cable including multiple interconnections between two radio units for cross polarization interference cancellation | |
| CN111884724B (en) | Photoelectric radio frequency feeder line assembly applied to downlink communication link | |
| EP1540833B1 (en) | Emission device intended to be coupled with a reception device | |
| CN102255659B (en) | Optical low-noise block downconverter, multi-dwelling unit equipment and related satellite television system | |
| CN202634431U (en) | Single-satellite double-output KU-waveband satellite tuner | |
| JP6706176B2 (en) | Broadband hybrid joint reception system and optical receiver (V-ONU) | |
| CN116996025B (en) | Terahertz image rejection mixer, communication circuit and communication equipment | |
| KR20030033094A (en) | Repeating System for Satellite Broadcasting | |
| CN103715989A (en) | Optical low-noise block down converter and satellite television system | |
| CN2318756Y (en) | High frequencyt device for receiving C-band satellite signal | |
| CN117977137A (en) | Assembled quadrature analog converter-filter assembly and electronic equipment | |
| KR200265685Y1 (en) | Device for Repeating Satellite Broadcasting Signal | |
| CN104469439A (en) | Signal conversion device | |
| CN114584158A (en) | 5G NR frequency shift double-channel MIMO power self-balancing system | |
| CN113922882A (en) | High-integration transceiving module based on microwave photons and working method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |