Compact sectoral UWB antenna with WLAN (5.2/5.8 GHz) and WiMAX (5.5 GHz) filtering characteristics

This paper presents a compact circular sectored microstrip antenna embedded with two symmetric circular slots and a sectoral ground plane embedded with an open-ended rectangular slot for enhancement of bandwidth and its applicability for UWB communications. The proposed structure exhibits Fractional Bandwidth(FBW) of 157.38 % (2.38 GHz -19.96 GHz) using Rogers RT Duroid 5880as a substrate for lower surface wave loss and attaining broader bandwidth producing notch band centered at around 5.30 GHz (4.26 GHz - 6.34 GHz) which effectively filters out WLAN(5.2/5.8 GHz) and WiMAX(5.5 GHz) bands. The gain of the antenna ranges from 5.34 - 5.73dBi throughout the resonant frequency band and the results obtained from measurement have good accordance with simulated solutions in terms of return loss, gain, polarization and far field patterns.