A Compact 28-nm FD-SOI CMOS 76–81 GHz Automotive Band Receiver Path with Accurate 0.2° Phase Control Resolution

This paper presents a 76–81 GHz receiver path for automotive radar applications in 28-nm FD-SOI CMOS technology. It introduces a new accurate phase control using MOS varactors. The proposed solution implemented in the front-end low noise amplifier (LNA) allows a phase control of maximum 22° with a 0.2° resolution for minimum degradation of the LNA and the receiver performances. The receiver contains a two-stage LNA with 5.5 dB noise figure (NF), a passive mixer, a local oscillator (LO) driver and a baseband (BB) amplifier. The receiver exhibits input compression points (ICP1dB) of −25.2 dBm and −12.6 dBm with and without BB amplifier, respectively. The active area of the receiver path is only 0.057 mm2 for a total power consumption of 41.7 mW.