A Terahertz FMCW Radar with 169-GHz Synthetic Bandwidth and Reconfigurable Polarization in 40-nm CMOS

The ultra-high-precision wireless sensing capability is highly demanded, but current radars encounter the bandwidth and cost problems. This paper presents a terahertz ultra-broadband FMCW radar using a sparse synthetic bandwidth architecture. Utilizing a 40-nm CMOS technology, a dual-band sparse SBR prototype with substrate-coupling antenna and reconfigurable polarization has been proposed, capable of achieving 141~310GHz synthetic operating frequencies (i.e. 169 GHz/74.9% synthetic bandwidth) and 1.0 mm range resolution.