Oval-Slot and Arc-Slits-Loaded UWB Planar Oval Monopole Antenna

This paper deals with the development of ultra-wideband (UWB) planar oval monopole antenna loaded by an oval-slot and arc-slits on its radiating patch. The proposed antenna designed with such configuration is aimed to support UWB applications. The oval-slot is made by mimicking and geometrically down-scaling the area of radiating patch, whilst two pairs of arc-slits are carved upon the patch. The tapered feed-line is employed to accommodate an impedance match for a wide-range frequency response. The configuration of planar oval monopole antenna is deployed on an RT/duroid 5880 dielectric substrate, while its characteristic response is observed at the frequency range of 1–20 GHz. The characterization result shows that the proposed antenna configuration works at the operating frequency from 1.38 GHz to more than 20 GHz, or in other terms the geometric fractional bandwidth of more than 354.43%, with two rejection bands at the frequency range of 1.95–3.47 GHz and 9.08–9.55 GHz.