Realization of ultra-wideband bistatic simultaneous transmit and receive antenna system

An ultra-wideband bistatic simultaneous transmit and receive (STAR) antenna system utilizing miniaturized TEM horn arrays is proposed. The TX/RX arrays are fully recessed in a metallic cavity and flush-mounted on a ground plane to reduce the interaction with nearby objects and antennas. Isolation >49dB is measured over the desired bandwidth of operation. Different techniques to improve the isolation at low and mid bands are also discussed.