Terahertz frequency band aperture coding high-resolution middle and long distance staring imaging device and method

Abstract

The present invention belongs to the radar imaging technology field, and especially relates to a terahertz frequency band aperture coding high-resolution middle and long distance staring imaging device and method. The imaging device comprises a terahertz transmission module 1, a transmission antenna 2, an electric control secondary reflector array 3, a paraboloid primary mirror 4, a receiving antenna 5, a terahertz receiving module 6, a memory 7 and a system control host 8. The terahertz transmission module is connected with the transmission antenna, and the electric control secondary reflector array is connected with a system control host; the paraboloid primary mirror is configured to perform reflection and alignment of the terahertz coding wave beam; the receiving antenna collects the scattering echo signals of the surface of a target; the terahertz receiving module is configured to perform low noise amplification, frequency mixing and quadrature demodulation processing of the scattering echo signals; and the system control host performs relation imaging processing of the echo signals and the reference signals to obtain a target reconstruction image. The terahertz frequency band aperture coding high-resolution middle and long distance staring imaging device and method obtain the high-resolution capability in the wave beam of the identical caliber traditional radar diffraction limit and are fast in mode switching.

Description

technical field [0001] The invention belongs to the technical field of radar imaging, and in particular relates to a high-resolution radar staring imaging technology, in particular to a terahertz frequency band aperture coding high-resolution mid-to-long distance staring imaging device and method. Background technique [0002] High-resolution radar imaging is an important means to realize battlefield reconnaissance, target detection and identification, and plays a pivotal role in ensuring national strategic security and competing for battlefield initiative. Conventional microwave radar systems can actively detect, have strong penetrating capabilities, and can work all day and all day long. Frame rate, high resolution front view imaging. Although Synthetic Aperture Radar (SAR) and Inverse Synthetic Aperture Radar (ISAR) imaging can obtain high resolution in the lateral direction through synthetic aperture, both rely on the relative motion between the radar and the target, an...

AI Technical Summary

Problems solved by technology

Although the terahertz aperture coded high-resolution imaging radar technology has many advantages over the traditional radar imaging technology, there are still some problems that need to be solved urgently, such as the limited imaging distance of the system, and the non-mechanical uniform scanning of the imaging plane by the terahertz beam is difficult to achieve. The quasi-optical design of the imaging system is more difficult

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