94-GHz dual-polarized phased array transmitter (TX) and receiver (RX) ICs in 130-nm BiCMOS and their module-level integration with antennas-in-package for radar imaging applications are presented. A detailed system-level analysis of the phased-array ICs is presented highlighting architectural choices for robust operation at high temperatures. Measurement results will be presented for the ICs, the modules, and a prototype 3-D imaging system.