Design of Double Notch Band Half-Elliptical Shape Reconfigurable Antenna for UWB Applications

Abstract

Abstract- A compact ultra-wideband (UWB) reconfigurable antenna with dualband-notched properties is presented in this paper. The dual notch band half –elliptical reconfigurable antenna is fed by (50 Ω) microstrip feed lines and it isprinted above an FR-4 substrates (32 × 32.6) mm2 dimensions. This dual bandnotched characteristic is accomplished by embedding two crossing U-shapedslot in the half-elliptical radiating patch of the proposed reconfigurable antenna.The modeling procedure and performance evaluation of the presented antennawas achieved by using the electromagnetic simulator software, (CST) ComputerSimulation Technology. The measured bandwidth of the presented antenna for(VSWR < 2) spans 2.6 GHz to 12 GHz, which covers the entire UWB band of 3.1GHz to 10.6 GHz, with a controlling dual notched band (VSWR > 2) in 3.5 GHzand 5.2 GHz. The presented antenna is appropriate for UWB applications withanother benefits of reduces the interference effect with the wireless local areanetwork (WLAN) systems that operating in 5.15–5.35 GHz band (IEEE 802.11a),as well as reducing the interference effect with the Worldwide Interoperabilityfor Microwave Access (WiMAX) application, which operates in 3.5 GHz band(IEEE 802.16e). The parameters that affect the efficiency of the antenna asregards to its frequency domain and radiation pattern qualities are studied