Wall Analysis of Buildings Using a Compact Multi-Band Radar System with a Common Phase-Center Antenna

A compact multi-band radar system operating from 24.05–26.5 GHz, 76–84 GHz and 167–182 GHz using three FMCW radar chips is presented. This system concept is enabled by a PCB-based common phase-center antenna, which illuminates a single dielectric lens. The antenna performance is evaluated by means of gain and radiation pattern measurements. A multitude of wall structures are analyzed using the proposed multi-band radar system. This demonstrates the versatility and robustness of the multi-band approach for the application of building analysis.