Single-emission-multi-reception terahertz aperture coding imaging device and method

Abstract

The invention discloses a single-emission-multi-reception terahertz aperture coding imaging device and method; the method comprises the following steps: S100, an emission unit of a single-emission-multi-reception array antenna emits a terahertz signal to a transmission type coding aperture; S200, the transmission type coding aperture is controlled by a system control host so as to load a lens phase modulation factor on the terahertz signal, and directionally projects the loaded signal to the target space so as to scan the target; S300, when the target surface scatters an echo signal, the transmission type coding aperture loads an aperture coding random phase shift factor on the echo signal; S400, the reception unit of the single-emission-multi-reception array antenna samples the echo signal with the loaded phase, and returns the signal to the system control host for image processing, thus obtaining a target image. The method and device can enlarge the imaging effect distance, and can further improve the imaging resolution and imaging speed, thus preventing the problems that an existing radar foresight imaging technology cannot consider the instantaneity, the high resolution and theimaging distance in the same time.

Description

technical field [0001] The invention relates to the technical field of high-resolution radar staring imaging, in particular to a single-shot multi-receiver terahertz aperture coding imaging device and method. Background technique [0002] With the development of society, radar high-resolution imaging plays an increasingly important role in ensuring national strategic security and promoting national economic development. The existing radar imaging systems mainly include microwave radar imaging systems and optical radar imaging systems. Among them, the optical sensor can perform forward-looking imaging, has short wavelength, high resolution, and fast imaging speed, but relies on target radiation, has poor penetration ability to smoke, dust, fog, and obstacles, and is easily affected by environmental factors. The microwave radar sensor can actively detect and has strong penetrating ability. However, due to the low microwave frequency, long wavelength, and low angular resolutio...

AI Technical Summary

Problems solved by technology

Under the single-send-single-receive antenna system, the high-resolution imaging of the target requires an increase in the number of sampling and encoding, thereby reducing the imaging speed

In addition, the current aperture coding imaging system requires random coding at the transmitting end, which inhibits the ability to form the transmitting beam and shortens the distance of the imageable target.

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