Wide Band CPW-fed Circular Patch Antenna with Tapered Ground Plane

Abstract

A novel Co-Planar Waveguide (CPW)_ fed antenna is presented for Ultrawide Band (UWB) applications. The main body of the antenna
comprises of a simple circular patch and a ground plane with tapered stepped structure. The bandwidth enhancement is realized by the addition of
the tapered steps to the antenna ground plane. The antenna is printed on a compact area of 20×20×1.6mm3FR4 substrate and operates over the very
wide band of 3-29.5GHz for S11<-10dB, that is as high as 163%. Good agreement is obtained between the simulated and measured results. Antenna
design process and bandwidth enhancement technique will be discussed in detail.