A Fabry–Perot antenna using a frequency selective surface layer with wideband and Low RCS for Mm-wave applications

Abstract

In this article, a Fabry-Pérot cavity antenna operating in the K-band is introduced, offering wideband, high gain with low RCS properties. The design consists of a patch antenna serving as a feed antenna and a bianisotropic frequency selective surface (FSS) layer incorporated to create a Fabry–Perot antenna for expanding the bandwidth, intensifying the gain, and minimizing radar cross-section (RCS). The proposed Fabry–Perot antenna is fabricated and measured, showing good agreement between simulated and measured results. The results show an impedance bandwidth of 23.6 % and a 3-dB gain of 14.1% at the center frequency of 28 GHz.