Abstract: This paper presents design of monopole band notched ultra wideband antenna. A coupling strip gap introduced in the square patch helps to notch certain frequency bands. This is a compact, low power ultra wide band (UWB) antenna which mitigates the saturation of spectrum. Its low power characteristic make it invisible for the radio systems sharing the same spectrum hence minimizes interference due to other licensed bands. This proposed band notched UWB antenna is used for several frequency bands such as Wi-Max(3.3 GHz to 3.6 GHz), WLAN (5.15 GHz to 5.35 GHz and 5.725 GHz to 5.825 GHz) and HIPERLAN/ 2( 5.15 to 5.35 GHz and 5.47GHz to 5.725 GHz).
Keywords: Ultra-wideband antenna, VSWR, Partial ground plane, rectangular metallic strip, U-slot rectangular patch antenna, coupling strip, industrial, scientific, and medical radio band(ISM).