A 240-GHz 4-TX 4-RX 2-D-MIMO FMCW Radar Transceiver in 130-nm SiGe BiCMOS

A 240-GHz 4-transmitter (TX) 4-receiver (RX) 2-D multiple-input-multiple-output (MIMO) frequency-modulated continuous-wave (FMCW) radar transceiver was designed in a 130-nm SiGe bipolar CMOS (BiCMOS) technology with f(T)/ f(max) of 250/370 GHz using patch antennas on a single 4.032 x 4.032 mm(2) chip. The differential RF inputs, located at the emitters of the direct conversion mixer quad transistors of each RX channel are dc-coupled and current-matched to the differential on-chip patch antenna. At 240 GHz, measurements reveal an RX conversion gain of 24.8 dB, a single-sideband noise figure of 14.9 dB, and an output power of -2 dBm.