Planar multi-layer passive retrodirective Van Atta array reflectors at X-band

Retrodirective array reflectors have found many applications in the area of collision avoidance systems, satellite communications and enhancing RCS in general. This paper presents two planar multi-layer passive retrodirective Van Atta array reflectors based on microstrip antenna operating at X-band. Theoretical analysis of the Van Atta array will be outlined, together with simulation results and RCS measurements of the planar Van Atta array reflectors. Future development in extending the bandwidth of the passive Van Atta array and further increase in RCS will also be discussed.