1. INTRODUCTION

UWB technology having advantages like high data rate transmission, overcoming multipath effects and not needing complicated systems, rapidly gained favorability in wireless telecommunications[1]. For these kind of systems, in the huge family of antennas, planar monopole antennas absorbed more attention owing characteristics like favorable radiation patterns, simple and low cost fabrication and multi band ability [2]. One of the major problems in UWB systems is interference with other frequency bands like WiMAX and WLAN. To filter these bands it is possible to use filters connected to the antenna or creating the filtering function in the antenna’s structure which is more favorable. Many techniques have been used to create filtering function in UWB antennas.