A 210-270-GHz Circularly Polarized FMCW Radar With a Single-Lens-Coupled SiGe HBT Chip Grzyb, Janusz ; Statnikov, Konstantin ; Sarmah, Neelanjan ; Heinemann, Bernd ; Pfeiffer, Ullrich R. Abstract Publication: IEEE Transactions on Terahertz Science and Technology Pub Date: November 2016 DOI: 10.1109/TTHZ.2016.2602539 Bibcode: 2016ITTST...6..771G