B13. Design of Notched Ultra-wideband Antenna with Irregular Radiator Shape Using Bacterial Swarm Optimization (BSO) Algorithm

In this paper, the Bacterial Swarm Optimization (BSO) is linked with the Finite Element Method (FEM) simulator (Ansoft HFSS simulator) to design a notched ultra-wideband antenna with an irregular shape radiator for ultra-wideband (UWB) applications. The proposed antenna has a compact substrate size of 30 mm by 30 mm and 1.6 mm thickness. The optimized antenna can cover the spectrum of UWB (from 3.1 GHz to 10.6 GHz) with notched band from 5 GHz to 6 GHz for WLAN service (5.15-5.825 GHz) achieved by attaching U-shape slot on the radiator element. The results are compared with that calculated by the Finite integration technique (FIT) method and with the measured results. Good agreement is obtained. The proposed antenna shows acceptable gain flatness with stable omnidirectional radiation patterns across UWB bands.