Signal Modeling and Analysis of a Planar Phased-Array FMCW Radar With Antenna Switching

A frequency-modulated continuous-wave (FMCW) radar system with a planar phased array based on antenna switching is considered. The radar system consists of N
₁
linear antenna arrays where each linear antenna array consists of N
₂
receiving antennas. In each cycle, the receiving antennas on each linear antenna array are switched to the single receiving channel in turn from the first antenna to the N
₂
th antenna. An accurate and detailed system model for the radar system is addressed. The Cramer-Rao lower bound (CRLB) analysis on the accuracy of estimating the azimuth angle, elevation angle, velocity, and range using the radar system is presented.