Terahertz Sensing With CMOS-RFIC:Feasibility Verification for Short-Range Imaging Using 300-GHz MIMO Radar

For solving various social issues, sensing technology has gained significant interest. Terahertz waves, which combine the high resolution of light and transparency of radio waves, enable visualization of obstacles behind internal structures. So, it offers potential for new solutions. This letter introduces the overview of a short-distance sensing system based on the full digital MIMO radar concept, the design, and fundamental evaluation results of 300 GHz RFIC using CMOS technology, as well as the achievements of imaging using 300 GHz terahertz wave based on actual measurements. Since the terahertz band can obtain an ultrawideband spectrum, several millimeter resolution imaging can be performed in azimuth, elevation, and depth direction. We show the feasibility of the security gate application with the measured high-resolution tomographic images.