Ultra-Wideband Small Rectangular Slot Antenna With Variable Band-Stop Function

This article proposes a novel, small, printed rectangular slot antenna for ultra-wideband (UWB) applications with dual band-notch function with band-notch performance. To increase the impedance bandwidth of the rectangular slot antenna and achieve UWB coverage, we use an inverted T-shaped conductor backed plane inside the rectangular slot on the other side of the substrate. Additionally, by using a coupled rotated C-shaped strip around the inverted T-shaped conductor backed plane, a frequency notched band performance has been obtained. The designed antenna has a small size of 20 × 20 mm ² while showing the radiation performance in the frequency band of 3.04 to over 10.87 GHz with a band rejection performance in the frequency band of 5.03 to 5.94 GHz. Simulated and measured results are presented to validate the usefulness of the proposed antenna structure for UWB applications.