3D FMCW Radar Using Beam Switching Transmitter

Abstract

This study proposes a 24 GHz FMCW radar system to detect the 3-dimensional location of a target. To determine the azimuth and elevation angles of a target, the proposed radar includes seven transmitters, illuminating seven elevation angles between −17.5° and 17.5° with a 5° resolution, and a receiver with a 2×4 array. Instead of using a conventional switch, beam steering is performed by directly switching the power amplifier of the transmitter. Experimental results show that the proposed radar system detects the location of the target with an RCS of −12.40 dBsm at a distance of 350 m with 20 dB SNR.