Broadband single-feed microstrip antenna in a fabry-perot resonator
We designed a single-feed microstrip antenna in a Fabry-Perot resonator cavity used for Ku-band (12-18 GHz) applications. A cavity was formed by a ground plane and a frequency selective surface made of a circular hole array and was excited by a single-feed microstrip patch located inside the cavity. The antenna with low-profile and reduced thickness produced a high gain (~19 dBi) and a broad bandwidth (~7%). The optimized antenna was fabricated, and the measured results were close to the simulated ones.