A Fabry-Perot Cavity Antenna With Non-Uniform Superstrate and EBG Ground for High Gain and High Aperture Efficiency

A design of high-gain Fabry-Perot cavity (FPC) antenna is presented with non-uniform frequency selective surface (FSS) superstrate and electromagnetic band gap (EBG) reflecting ground. The FSS EBG ground are utilized to flexibly control the attenuation constant $\alpha $ over a large aperture while ensuring resonance condition FPC. uniformity amplitude field improved significantly obtaining appropriate radiation efficiency. Therefore, high gain efficiency can be achieved within desirable bandwidth. theoretical estimation conducted prove superiority proposed referenced uniform one. straight-forward methodology based on radial leaky-wave theory modified transverse equivalent network (TEN) model. FPC diameter notation="LaTeX">$6.6\lambda _{0}$ designed at 15 GHz. Simulated results show that 24.6 dBi an 67.9% has been achieved. measured 24.0 58.4%. 10dB return loss bandwidth 3 dB 5.3% 3.2%, respectively. overcomes limit conventional antennas, guide two-dimensional antennas.