Filter feedback multiplexed millimeter wave subcarrier optical controlled microwave beam forming network

A microwave beam and millimeter wave technology, applied in the field of optical communication and microwave combination, can solve the problems of weak array scale expansion, low energy application efficiency of light source, etc. Effect

Inactive Publication Date: 2009-02-04
TSINGHUA UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low light source energy application efficiency and poor array scale scalability faced by the current optically controlled microwave beamforming network based on broadband light source, and propos...

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  • Filter feedback multiplexed millimeter wave subcarrier optical controlled microwave beam forming network

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Embodiment Construction

[0020] The basic principle of the present invention is: by multiplexing the positive and negative directions of the filter, the spectral shape of the wide-spectrum light source in the beamforming network can be shaped and optimized, so that its amplification efficiency in the EDFA can be greatly improved, and then the entire chain can be improved. The power level of the effective spectrum in the road can be improved to improve energy utilization efficiency. Under the same system power, the new solution can effectively improve the signal-to-noise ratio and support larger-scale arrays than ordinary delay networks. The basic structure of this beamforming network is as follows figure 1 shown.

[0021] figure 1 The wide-spectrum light emitted by the wide-spectrum light source first enters the wavelength selective multiplexing module, which is successively connected by a 1:N beam splitter, N wavelength selective multiplexing branches and an N:1 combiner Composition, the wide-spect...

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Abstract

The invention relates to a filter feedback reusable millimeter wave subcarrier light controlled microwave beam forming network, which belongs to the technical field of millimeter wave subcarrier optical controlled microwave beam forming, and is characterized in that a wavelength selecting reusable module transforms wide-spectrum light output by wide-spectrum light source to a comb-like spectrum; the comb-like spectrum is modulated by microwave signals which need to be transmitted, and the comb-like spectrum most energy of which is concentrated in the peak wavelength is formed after dispersive delay and amplification; then an adjustable filter in the wavelength selecting reusable module is utilized for inverse filtering to obtain each required signal; amplification efficiency of an erbium-doped optical fibre amplifier is greatly enhanced, and then the power level of useful spectra of the entire link is enhanced; and compared with that traditional wide-spectrum light passes through the light controlled microwave beam forming network, the invention enhances energy utilization.

Description

technical field [0001] Filter feedback multiplexing millimeter-wave subcarrier optically controlled microwave beamforming network is a signal processing system that performs true delay on millimeter-wave subcarriers. It belongs to the field of optical communication and microwave integration, especially involving broadband optically controlled phased arrays. Radar, light control beam forming smart antenna and other fields. Background technique [0002] Optically controlled microwave beamforming network (OBFN) is an important research direction in the field of microwave photonics. It uses light wave technology to perform power distribution, phase control, and power combination on broadband microwave signals, so as to control the spatial distribution of microwave signals. The earliest beam forming was mainly used in phased array radars, mainly using phase shifters to achieve beam pointing. But when the radar needs to perform high-precision detection, tracking, positioning and ...

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Application Information

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IPC IPC(8): H04B10/12H04B10/20H04B10/25
Inventor 郑小平宋怡桥薛晓晓张汉一周炳琨
Owner TSINGHUA UNIV
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