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Multipoint high-frequency microwave signal generating method

A technology of microwave signal and signal generation, applied in electromagnetic wave transmission system, electrical components, transmission system, etc., can solve the problems of millimeter wave processing difficulties and expensive millimeter wave source, and achieve strong practical value, low cost and easy realization

Inactive Publication Date: 2010-03-17
PLA UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

Because of the issues involved in frequency up-conversion and down-conversion, mmWave sources must be available in the central office or base station, and mmWave sources are very expensive
On the other hand, the processing of millimeter waves in the electrical domain is already relatively difficult, facing an electronic bottleneck that cannot be broken through

Method used

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  • Multipoint high-frequency microwave signal generating method
  • Multipoint high-frequency microwave signal generating method
  • Multipoint high-frequency microwave signal generating method

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Embodiment Construction

[0027] 1). Based on the Brillouin scattering effect of single-mode fiber, the Brillouin scattering effect produces Stokes light with a frequency shift of 0.088nm relative to the pump light. Based on the ring resonator amplification structure, the input signal is more enters the Brillouin scattering device for the first time to generate multi-level Stokes light;

[0028] 2). Based on the double-peak optical filter of the predetermined wavelength interval, obtain 2 laser wavelengths whose frequency interval is equal to the frequency of the target microwave signal (all frequency components except these two laser wavelengths are suppressed), the 2 A laser wavelength is beaten to generate a microwave signal with a frequency that is an integer multiple of 11 GHz;

[0029] 3). A multi-peak filter designed based on a predetermined wavelength interval. The interval between each two peaks of the multi-peak filter is about 11GHz or an integer multiple of 11GHz. Using the multi-peak filte...

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Abstract

The invention relates to a multipoint high-frequency microwave signal generating method; in the method, a 2*2 coupling, a Brillouin scattering device and a light filter are used for extracting pump signals and Stokes signals in one or multiple stages, and then the extracted signals are subject to beat frequency to generate one or a plurality of high-frequency microwave signals. The method comprises the following steps: firstly, designing an annular cavity structure based on Brillouin scattering, and arranging a Brillouin scattering device in the annular cavity so as to simultaneously obtain pump signals and Stokes signals in multiple stages; secondly, selecting two or a plurality of laser wavelengths the frequency interval of which is equal to that of the target microwave signal by using the light filter based on a preset reflectance spectrum, wherein all frequency components except for the selected laser wavelengths are inhibited; and thirdly, carrying out the beat frequency on the selected laser wavelengths to generate one or a plurality of microwave signals of which the frequencies are approximately integral multiples of 11GHz.

Description

technical field [0001] The invention relates to a method for generating multi-level Stokes (Stokes) waves by using the Brillouin effect and a ring cavity resonant amplifying structure and passing it through a filter to generate a high-frequency microwave signal. It only needs one Brillouin wave The deep scattering device can generate multi-level Stokes waves, and generate high-frequency microwave signals through photodetectors. This method generates microwaves with high frequency and multiple frequency points, 11GHz, 22GHz, 33GHz, ..., up to 77GHz. The device has the advantages of simple structure, high conversion efficiency, easy realization and strong practical value. Background technique [0002] Generating high-frequency microwave signals optically is one of the key technologies in the Radio over Fiber (RoF) system. At present, the main methods of optically generating high-frequency microwave signals mainly include the method of optically generating high-frequency micr...

Claims

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Application Information

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IPC IPC(8): H04B10/00
Inventor 蒲涛沈颖徐智勇王荣
Owner PLA UNIV OF SCI & TECH
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