Scattering Characteristics Analysis and Super-Resolution Imaging of Clothes with Terahertz Radar

Abstract

The unique advantages of terahertz waves can greatly promote the development of security check, body measurement and other fields. In order to study the scattering characteristics of clothes made of different materials in the terahertz band, a terahertz radar system operating at 220GHz was used, and experiments on six kinds of clothes were carried out. It can be seen from the results that all kinds of clothes tested cannot completely block the penetration of the terahertz wave. On this basis, super-resolution imaging of the mannequin in clothes is realized through the orthogonal matching pursuit algorithm combined with compressed sensing theory. The results show that this algorithm has better resolution and anti-interference performance than the traditional one-dimensional imaging algorithm.