Device and method for realizing frequency diversity array based on coherent optical frequency comb

Abstract

The invention discloses a device and method for implementing a frequency diversity array based on a coherent optical frequency comb. The device includes: a bias control circuit connected to the bias control port of the electro-optic modulator, and a signal generator connected to the port of the electro-optic modulator RF input port; the laser is connected to the input port of optocoupler one; the output port one of optocoupler one is connected to the input port one of optocoupler two through optical frequency comb generator one, and the output port two of optocoupler one is connected to the electro-optic modulation The optical input port of the device; the output port of the electro-optical modulator is connected to the input port 2 of the optical coupler 2 after passing through the optical frequency comb generator 2; the output port of the optical coupler 2, the array optical filter, the array delay processing module, The photodetector array, the microwave front-end array and the antenna array are connected in sequence. The invention utilizes the advantages of microwave photon technology in parallel processing and wavelength multiplexing to realize one-time generation and parallel processing of array stepping microwave signals.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a frequency diversity array realization device and method based on a coherent optical frequency comb. Background technique [0002] In 2006, the U.S. Air Force Power Research Laboratory proposed the concept of frequency diversity array (Frequency Diversity Array: Frequency Diverse Array, also known as frequency control array) (Paul Antonik, Michael C.Wicks, HughD.Griffiths and Christopher J.Baker, Frequency diverse array Radars, 2006IEEERadar Conference, 2006, Vols.1and 2: 215-217), by adding a frequency increment Δf much smaller than the center frequency to the transmitted signal on the adjacent array element, that is, the radiation frequency of the first array element for f 0 , while the radiation signal frequency of the mth array element is f 0 +(m-1)Δf. When the frequency offset Δf is fixed, the beam pointing changes periodically with the distance, that is, a dis...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a frequency diversity array implementation device and method based on a coherent optical frequency comb in view of the shortcomings of the traditional electrical frequency control array, such as many frequency mixing devices, difficult channel coherence, and difficult broadband tuning. Utilize the advantages of microwave photonics technology in parallel processing and wavelength multiplexing to realize one-time generation and parallel processing of arrays of stepped microwave signals

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