A D-band Fully-Integrated 2-RX, 1-TX FMCW Radar Sensor with 13dBm Output Power

In this paper, we present a fully-integrated frequency-modulated continuous-wave radar transceiver working in the D-band. The transceiver is equipped with two receivers and one transmitter. The transmitter is based on a high-speed quadrature-phase-shift-keying modulator and each of the two receivers is based on a fully-differential I/Q receiver. The radar sensor can be operated in a single-input multiple-output configuration to perform Doppler, range, and angular measurements. The D-band quadrature signals for the transmitter and the two receivers are generated using transmission-line based hybrid couplers. The transceiver utilizes a $\times 6$ frequency multiplier chain with state-of-the-art power-added-efficiency and conversion gain of 3% and 27dB, respectively. The transmitter has a measured peak output power of around 13dBm at 122GHz, which is the highest reported power for Si-based D-band radar sensors. The receivers are designed to be tolerant to high transmitter leakage signals and provide a measured conversion gain of around 14dB. The entire transceiver runs on 1.8V and 3.3V supply voltage has a DC power consumption of 1.2W. The chip size is 3mm $\times 3$ mm.