UWB small slot antenna with WLAN frequency band-stop function

Abstract

A new design of a multi-resonance small slot antenna with variable band-notched function for ultra-wideband (UWB) applications is proposed. The proposed slot antenna consists of a square radiating stub and a ground plane with a pair of L-shaped parasitic structures and an inverted T-shaped strip protruding inside the rectangular slit, which provides a wide usable fractional bandwidth of more than 135% (2.98-16.73 GHz), while showing the band rejection performance in the frequency band of 5.05-5.9 GHz to avoid any interference from wireless local area network systems. The designed antenna has a small size of 20 20 0.8 mm3. Simulated and experimental results obtained for this antenna show that it exhibits good radiation behaviour within the UWB frequency range. © The Institution of Engineering and Technology 2013.