A miniatured Hexagon-shaped UWB Antenna

A miniaturized ultra-wideband printed antenna working at C / X / Ku / K / Ka band is presented in this article. The hexagon-shaped radiator with a semi-elliptical ground plane is designed as a feed antenna. The size of the antenna is 32 ×32×1.47mm
³
or 0.32 λ0×0.32λ0×0.0147λ0, where λ0 is the wavelength at 3 GHz in the free space. The proposed antenna is fed by a coplanar waveguide (CPW). The impedance bandwidth and fractional bandwidth are 26.2 GHz and 161.4%, respectively. The antenna operates from 3.13-29.33 GHz. The peak gain is 6.64 dBi and the radiation patterns are approximately omnidirectional in H-plane in the whole operating frequency band.