A frequency diversity array implementation device and method based on a coherent light frequency comb

Abstract

The invention discloses a frequency diversity array implementation device and method based on a coherent light frequency comb. The device is characterized in that a bias control circuit I is connectedto a bias control port of an electro-optical modulator, and a signal generator is connected to a radio frequency input port of the electro-optical modulator; The laser is connected with the input port of the optical coupler I; A first output port of the first optical coupler is connected with a first input port of a second optical coupler through a first optical frequency comb generator, and a second output port of the first optical coupler is connected to an optical input port of the electro-optical modulator; The output port of the electro-optical modulator is connected to the input port IIof the optical coupler II after passing through the optical frequency comb generator II; And the output port of the optical coupler II, the array optical filter, the array delay processing module, the photoelectric detector array, the microwave front-end array and the antenna array are sequentially connected. The advantages of the microwave photon technology in the aspects of parallel processingand wavelength multiplexing are utilized, and one-time generation and parallel processing of array stepping microwave signals are achieved.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a device and method for realizing a frequency diversity array based on a coherent optical frequency comb. Background technique [0002] In 2006, the U.S. Air Force Dynamics Research Laboratory proposed the concept of frequency diversity array (Frequency Diverse Array, also known as Frequency Controlled 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 adjacent array elements, that is, the radiation frequency of the first array element for f 0 , and the frequency of the radiation signal of the mth array element is f 0 +(m-1)Δf. When the frequency offset Δf is fixed, the beam pointing changes periodically as the distance changes, that is, a distance-depend...

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

Images