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Optical low-noise block downconverter, multi-dwelling unit equipment and related satellite television system

A low-noise frequency reducer and frequency reduction technology, applied in electromagnetic wave transmission system, transmission system, optical fiber transmission and other directions, can solve the problem of high cost and achieve the effect of reducing cost

Active Publication Date: 2011-11-23
WISTRON NEWEB
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the cost of the satellite TV system 20 using optical fiber transmission is much more expensive than the traditional satellite TV system using coaxial cable

Method used

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  • Optical low-noise block downconverter, multi-dwelling unit equipment and related satellite television system
  • Optical low-noise block downconverter, multi-dwelling unit equipment and related satellite television system
  • Optical low-noise block downconverter, multi-dwelling unit equipment and related satellite television system

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Embodiment Construction

[0046] Please refer to Figure 5 , Figure 5 It is a schematic diagram of an optical low-noise frequency down converter 50 according to an embodiment of the present invention. The optical low-noise downconverter 50 is used to down-convert input signals with orthogonal polarization directions, such as vertical and horizontal polarization signals, and convert them into optical signals, which is suitable for optical fiber transmission satellite television systems. Figure 5 The optical low-noise downconverter 50 is based on the general-purpose low-noise downconverter specifications commonly used in Europe as an example.

[0047] The optical low-noise frequency down converter 50 includes frequency down circuits 500 and 502, an oscillator 504, and optical transmitters 506 and 508. The frequency reduction circuit 500 includes a low noise amplifier 510, a band pass filter 512, a mixer 514, a band pass filter 516, and an intermediate frequency amplifier 518. The frequency reduction circui...

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Abstract

The invention discloses an optical low-noise block downconverter, multi-dwelling unit equipment and a related satellite television system. The optical low-noise block downconverter comprises a first downconversion circuit, a second downconversion circuit, an oscillator, a first light emitter and a second light emitter, wherein the first downconversion circuit is used for performing downconversion and filtering processing on a first polarized signal input into the optical low-noise block downconverter to output a first intermediate frequency signal; the second downconversion circuit is used for performing the downconversion and filtering processing on a second polarized signal input into the optical low-noise block downconverter to output a second intermediate frequency signal; frequency bands of the first and second intermediate frequency signals are the same; the oscillator is coupled to the first and second downconversion circuits, and is used for generating an oscillation signal and outputting the oscillation signal to the first and second downconversion circuits; the first light emitter is coupled to the first downconversion circuit, and is used for converting the first intermediate frequency signal into a first optical signal; and the second light emitter is coupled to the second downconversion circuit, and is used for converting the second intermediate frequency signal into a second optical signal. The optical low-noise block downconverter, the multi-dwelling unit equipment and the related satellite television system reduce the cost.

Description

Technical field [0001] The invention relates to an optical low-noise block down converter (Optical Low-Noise Block Downconverter), multiple residential unit equipment and related satellite television systems, in particular to a low-cost optical low-noise block down converter, multiple residential unit equipment and related Satellite communication system. Background technique [0002] Satellite communication has the advantages of wide coverage and freedom from ground environment interference. For the purpose of satellite TV broadcasting, users can watch various channel programs and enjoy high picture quality. Please refer to figure 1 , figure 1 It is a schematic diagram of a well-known satellite television system 10. The satellite TV system 10 is a satellite TV shared antenna system (Satellite Master Antenna Television), which is suitable for use in buildings or communities. Each user can receive satellite signals, such as Ku band (10.7-12.75 GHz) satellite signals through a shar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/12H04N7/20H04B10/2507
Inventor 王则闵
Owner WISTRON NEWEB
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