A D-Band Fully-Differential Quadrature FMCW Radar Transceiver with 11 dBm Output Power and a 3-dB 30-GHz Bandwidth in SiGe BiCMOS

摘要

This paper presents a fully-integrated D-band bistatic frequency-modulated continuous-wave radar transceiver (TRX) chip based on 130 nm SiGe BiCMOS technology. The TRX chip consists of an active IQ modulator and an IQ down-conversion mixer. It is based on a ×6 frequency multiplier chain, with a 40-GHz frequency doubler and a 120-GHz frequency tripler. The IQ signals are generated by a capacitively loaded folded 90° hybrid coupler. The entire chip is optimized for wideband operation. The TRX chip and the circuit break-outs are characterized on wafer. The TRX chip demonstrates state-of-the-art performance with a peak output power of 11 dBm and a 3-dB bandwidth of 30 GHz. The on-chip receiver provides a measured conversion gain of around 15 dB and a simulated minimum noise figure of 8 dB, with a 1-dB input compression point of -7.5 dBm. The IQ receiver shows a good balanced behavior with an average amplitude imbalance of 0.5 dB and a phase variation from 93° to 98° throughout the 3-dB bandwidth. The chip consumes a total DC power of 825 mW and has an area of 1.964 × 1.964 mm~2.