A K-Band FMCW Radar Transceiver IC for Small Drone Radars

This paper presents a K-band frequency-modulated continuous-wave radar transceiver integrated-circuit (IC) implemented in a 65 nm complementary metal-oxide semiconductor process. The transceiver IC includes 1-ch Tx and 2-ch Rx. The wideband chirp generator, radio frequency (RF) and intermediate frequency (IF) parts, and analog-to-digital converter were integrated into the IC. The IF component can automatically compensate for the path loss difference along the distance using the sensitivity time control (STC) function with DC offset cancellation feedback. The receiver can perform over a wide dynamic range through gain control in the RF and IC. The full receiver gain was 83 dB, and the transmitted power was 11.64 dBm. An experiment using an external antenna showed that the maximum detection range was 26.4 m.