Characterization of Compact Ovoidal Printed Antenna with Windowed Groundplane

This paper deals with the bandwidth enhancement of a compact printed antenna with an ovoidal patch incorporated with an ovoidal window on its groundplane. A relative position of the sharp-end of the ovoidal patch to the windowed groundplane is altered to investigate its influence to the bandwidth response. The original ovoidal patch was rotated in 180o, followed by rotating the ovoidal windowed groundplane. This reciprocal position improves the antenna performance where the bandwidth percentage increases up to approximately 49%. The fabricated antenna works at the frequency range of 3.20–19.62 GHz or with the bandwidth percentage of 207%. The measured radiation patterns at the frequencies of 4 GHz, 8 GHz, and 17 GHz show good agreements with the simulated ones. This configuration has provided a maximum gain of 7.98 dBi at the frequency of 11 GHz.