To address the spectrum congestion issue in the every-increasing need for wireless data rates, Terahertz (THz) regions have attracted much attention in recent years. Considering the application demands as well as the technology trends, our group is putting effort into doing researches on CMOS integrated circuits and systems targeted for THz communications compliant with the standard IEEE 802.15.3d. The circuit building blocks mainly include voltage-controlled oscillators, phased-locked loops (PLLs), mixers, low-noise amplifiers, and on-chip antennas.
Millimeter-wave RFID is considered to greatly benefit the future internet-of-things eco-system. Currently, our group is investigating the 60GHz/90GHz RFID system, with focus on the circuit design of pad-less and battery-less RFID tags using standard CMOS technologies.