Design of an UWB Planar Monopole Antenna for Use in a Circular Cylindrical Microwave Imaging System

Abstract

The design of an ultra wideband planar monopole antenna for use in a circular cylindrical microwave imaging system is presented. The designed antenna is developed on a high dielectric substrate and its size is 13 mm by 26 mm. The measured 10-dB return loss bandwidth of this antenna element is from 3 GHz to more than 15 GHz. Its radiation efficiency is higher than 90% over the whole 10 dB return loss bandwidth.