Microwave related imaging system and imaging method based on thinned array

Abstract

The invention discloses a microwave related imaging system and a microwave related imaging method based on a thinned array, which mainly aim to solve the problems of poor imaging effect and low resolution when non-radial relative movement does not exist between a radar antenna and a target in the prior art. The system comprises a transmitting antenna (1), a target (2), a receiver (3) and a signal processor (5), wherein the transmitting antenna (1) is formed by a thinned array antenna; different microwave coded signals are transmitted by all array elements, so as to form a microwave radiation field in space through incoherent superposition; the target (2) is irradiated through the microwave radiation field, so as to generate target scattering echoes; the microwave radiation field (4) on the surface of the target (2) is stored; the target scattering echoes are received by the receiver (3) through a single antenna and a single channel; and the target scattering echoes received by the receiver (3) and the pre-stored microwave radiation field (4) are processed by the signal processor (5), so as to obtain the imaging of the target. By using the system and the method, super-resolution imaging of the target without ambiguity can be realized when the non-radial relative movement does not exist between the radar antenna and the target, and the system and the method can be used for super-resolution imaging of the target by an airborne forward-looking radar and a ball-borne radar.

Description

technical field [0001] The invention belongs to the technical field of radar, relates to a microwave correlation imaging system and an imaging method, and can be used for sparse array antenna structure, signal collection and processing, and optimization algorithm application. technical background [0002] The scheme of using entangled photon pairs to realize quantum correlation imaging was first theoretically proposed by Soviet scholar David Nikolaevich Klyshko in 1988. Shi Yanhua, T.B.Pittman and others from the University of Maryland in the United States used the entangled photon pairs generated by the spontaneous parametric down-conversion SPDC process in 1995, combined with coincidence measurement technology, to realize a quantum correlation imaging and interference phenomenon. In 2004, the Lugiato group in Italy theoretically proposed that correlation imaging can also be realized by using ordinary classical thermal light sources. In 2005, Shi Yanhua's group completed t...

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Problems solved by technology

[0006] In the prior art, when there is no non-radial relative motion between the radar antenna and the target, the imaging effect is poor and the resolution is low

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