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

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 ...

AI Technical Summary

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 propose a new type of beamforming network based on filter multiplexing. Wide-spectrum light source optically controlled microwave beam forming network, effectively improving the energy utilization efficiency of the system, and conveniently expanding the scale of the system array

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