Design CPW-Fed Printed Monopole UWB Antenna for Band Notched Applications

Abstract

A coplanar waveguide (CPW)-fed printed monopole UWB antenna is proposed. The antenna has dual band notched characteristics for ultra-wideband (UWB) applications. The proposed CPW-fed antenna consist of stepped feed line, stepped ground plane, stepped rectangular patch, U-slot, and C-slot to improve the bandwidth. By removing a C shaped slot and a U shaped slot from stepped patch, the band reject property is obtained at 3.4GHz/4.4GHz. The antenna is designed on the FR4 epoxy substrate with 24 (length) x 24 (width) surface area. A 50 Co-Planar Waveguide (CPW) transmission line is used to feed the printed stepped patch. The design and simulation of the antenna is completed by High Frequency Structure Simulator (HFSS) software. High Frequency Structure Simulator is frequency domain simulation software. Finite Element Method (FEM) method is in HFSS software used for antenna structure optimal design and performance simulation. The simulation result shows that, the compact antenna has good results including consistent radiation patterns, stable gain, with better return loss, broadband impedance matching.