Patch loaded slot antenna for super wideband applications with dual-band notch characteristic

Abstract

Abstract This paper presents a patch loaded slot antenna for super wideband (SWB) application. To obtain SWB characteristic, the proposed antenna geometry combined a rectangular slot and an overlying patch excited by a trident shaped microstrip feed. It is observed that the hybrid nature of the proposed antenna effectively enhances the impedance bandwidth up to 120%, by combining the resonance of both patch and slot. Besides, it is investigated that after converting the conventional tapered feed into the trident shape feed, the impedance bandwidth is increased further from 120% to 167% ranging between 1.25 to 15 GHz. Moreover, one U-shaped slot and two L-shaped stubs are inserted into the antenna design to introduce the dual-band rejection property from 1.8 to 2.4 GHz (GSM 1800, Wi-Fi 2.1 and 2.4) and 3.1 to 4.2 GHz (WiMAX and C-band). Further, to validate the simulation results a prototype is fabricated and tested. The measured result shows that the proposed antenna offered an impedance bandwidth of 170.3% from 1.2 GHz to 15 GHz.