Automotive FMCW radars face growing challenges from interference and strong reflections, requiring receiver architectures with enhanced robustness. This PhD proposes a novel mmWave receiver front-end integrating a reconfigurable N-path filter that attenuates strong interferers before down-conversion, fundamentally relaxing linearity constraints. A comprehensive architectural and circuit-level analysis was carried out, supported by the design of 2-path and 4-path filters in 28nm CMOS bulk technology, operating throughout the mmWave automotive radar band. A proof-of-concept chip was experimentally validated, demonstrating the first reported N-path filtering across the 76–81 GHz automotive radar band.
