Dual band-notched UWB antenna with improved radiation pattern

Abstract

In this paper, a novel microstrip-fed compact antenna with dual band-notched characteristic is presented for ultra-wideband (UWB) applications. Assisted with symmetrical open-circuited stubs, a UWB impedance matching can be achieved. A novel modified capacitively loaded loop (CLL) resonator is proposed to realize the dual notched bands. By symmetrically placing a couple of proposed resonators in the vicinity of the feed line, dual band-notched properties in 3.4–3.7 GHz for WiMAX and 5.15– 5.825 GHz for WLAN are generated. The good performance of the dual notched bands, stable gain, and radiation patterns in the operating bands make the proposed antenna a good candidate for various UWB applications.