Psi-shaped Ultra-wideband Monopole Antenna with a Modified Feeding Structure

Novel design of Psi-shaped printed monopole antenna consisting of modified feeding structure is proposed. A detailed parametric study for various antenna parameters that forms the Psi shaped patch is presented. The pair of vertical slots in Psi shaped patch optimizes the antenna bandwidth till 4 GHz of frequency range whereas position of horizontal slots that constitutes modified feeding structure optimizes the antenna bandwidth till 6GHz. Further optimization for bandwidth beyond 7 GHz is obtained by suitably selecting the feed line position along patch base edge which optimizes the input impedance at higher order patch resonant mode. The proposed Psi shaped patch antenna yields BW from 1.5 GHz to more than 10GHz. The proposed configuration shows broadside radiation pattern over most of the bandwidth with peak broadside gain of nearly 2 dBi. Due to the realized antenna characteristics Psi shaped antenna can find applications in Bluetooth, Wi-Fi and personal communication systems for frequencies above 1GHz.