BAND-NOTCHED SMALL SQUARE SLOT ANTENNA FOR ULTRA-WIDEBAND APPLICATIONS

摘要

In this article, a novel printed slot antenna for ultra wideband applications with variable frequency band-notch characteristic is presented. The proposed antenna consists of a modified radiating stub with a pair of L-shaped slits and a ground plane with two T-shaped parasitic structures, which provides a wide usable fractional bandwidth of more than 135% (2.81-5.1GHz) while showing the band rejection performance in the frequency band of 5 to 6 GHz. By cutting a pair of L-shaped slits with variable dimensions on the radiating stub frequency band-stop performance is generated and we can control its characteristics such as band-notch frequency and its bandwidth. The designed antenna has a small size of 20×20 mm~2. Simulated and experimental results obtained for this antenna show that it exhibits good radiation behavior within the UWB frequency range.