A CPW-Fed Wide Slot Ultra-Wideband Antenna with Triple Band Rejection Characteristics

Abstract

AbstractA coplanar waveguide (CPW) fed circular slot ultra-wideband (UWB) antenna with triple band-notched characteristics is proposed and its performance is evaluated by HFSS simulation and measurement. The three notch bands are realized by means of two arc-shaped parasitic elements (ASPEs) and an E-shaped stub (ESS). By adjusting the dimensions of the ASPEs and ESS, three notch bands can be tuned to filter unwanted 3.5 GHz WiMAX, 5.5 GHz WLAN and 8 GHz X-band signals. The simulated and measured results demonstrate that the proposed antenna covers the entire UWB band with voltage standing wave ratio (VSWR) less than 2 and provides three notch bands to reduce potential interferences from existing narrowband systems. Furthermore, this tri-band frequency rejection UWB antenna can provide omnidirectional radiation patterns and high rejection band-notched characteristics, which are suitable for UWB communication applications.