Wideband and Compact Fabry-Perot Cavity Antenna Using Single Layer PRS With Circular Patch

A broadband and compact Fabry-Perot cavity antenna (FPCA) with single-layer partially reflective surface (PRS) is presented. The structure of the PRS designed by printing complementary circular patches on the top of the dielectric substrate and circular apertures on the bottom of it. By optimizing the parameters of PRS structure, the PRS produced positive phase gradient in the relatively wide operating frequency range from 7.8-10.5GHz, which obviously extends bandwidth of the FPCA. The FPCA fed by 2x2 slots coupled 2x2 patches, which not only produces a wide impedance bandwidth, but also reduces complexity of fabrication. The simulation results of the proposed antenna show that the -10dB impedance bandwidth of 7.72-10.83GHz (33%). The 3dB gain bandwidth of 7.8-10.1GHz (25%) with a peak gain of 13.6dBi. Expanding bandwidth using only single-layer dielectric substrate.