Wideband Fully Metallic Fabry Perot Cavity Antenna with a Curved Ground Plane

This paper proposes a wideband FPCA with fully metallic construction using a curved ground plane. A metallic construction is quite favourable for high power space applications. By curving the ground plane, a variable resonance cavity height is realized. That results in a wider 3dB Gain-Bandwidth of 19% as compared to 9.2% for a traditional flat ground plane. A very low sacrifice in maximum gain, a mere 0.48dB is traded against this increase in the bandwidth. Impacts on Gain-Bandwidth by different degrees of ground plane curvatures are also presented.