Experimental research on imaging of precession targets with THz radar

摘要

The terahertz (THz) radar has obvious advantages of high-resolution imaging because it is relatively easy to achieve large signal bandwidth compared with the microwave band. A 0.33 THz imaging radar system was built and experiments on a precession warhead model are presented. The imaging algorithm based on precession is adopted and high-resolution inverse synthetic aperture radar images are obtained. From these imaging results, the structures such as the cone–top and the cone–cylinder junctions, and even the subtle structures such as rivets are clearly shown. Finally, the resolutions under different conditions are analysed to verify the advantages of THz radar in high-resolution imaging.