Synthetic Ultra-Wideband Phased-Array Transceiver for Millimeter-Wave Imaging Applications With On-Chip Antennas

This paper discusses the design of a synthetic ultra-wideband phased-array transceiver front-end in SiGe BiCMOS that is capable of providing the largest bandwidth among all RF millimeter-wave imagers reported in the literature. An ultra-wide imaging bandwidth of 100 GHz (10–110 GHz) is achieved by the integration of three adjacent, disjointed frequency sub-bands. Each sub-band includes a fully-integrated $4 imes 2$ array of transceivers. Each transceiver includes a low-power differential pulse generator, a delay generator, a transmit-receive (T/R) switch, a low-noise amplifier (LNA), a multiplier, and an on-chip slot bowtie antenna.