Low profile dual band-notched slot antenna with modified ground plane for UWB systems

In this paper, a new compact microstrip-fed slot antenna with dual band-notched performance for Ultra-Wideband (UWB) communications is presented. In the proposed structure, by using an inverted U-shaped conductor-backed plane, a new resonance at 12.5 GHz is excited and hence much wider impedance bandwidth can be produced. In order to generate a single band-notched function, we use an inverted T-shaped strip protruded inside the rectangular slot, with this structure first rejection band around of 3.3-4.2 GHz can be achieved. By inserting a pair of C-shaped slots in the ground plane, dual bandnotched function can be produced. The measured results reveal that the presented dual band-notched slot antenna offers a wide bandwidth from 2.62 GHz to 13.81 GHz, with two notched bands covering all the 5.2/5.8 GHz WLAN, 3.5/5.5 GHz WiMAX and 4-GHz C bands. The proposed antenna has a small size. Simulated and experimental results obtained for this antenna show that it exhibits good radiation behavior within the UWB frequency range. © 2014 ACES