Absorbing FSS ground plane for reduced-Radar Cross Section of conformal antennas

Several approaches in the literature have been attempted for reducing the Radar Cross-Section (RCS) of antennas, specifically for conformal patch antennas. Ideally, the antenna should function unimpeded at the communication frequency but should have a minimal radar signature at all other frequencies of interest. Here, absorbing Frequency Selective Surfaces are used as the ground plane of a conformal antenna in order to reduce the RCS at higher frequencies. This technique offers many advantages over existing published techniques in the literature that generally show limited RCS reduction or poor antenna performance.