Dual segment rectangular dielectric resonator antenna with metamaterial for improvement of bandwidth and gain

Abstract

The simulation and experimental studies of an aperture-coupled wideband dual segment rectangular dielectric resonator antenna with metamaterial for C-band applications are presented in this paper. The antenna consists of Alumina (Al2O3) ceramic as upper segment and Teflon as lower segment. The combination of circular-shaped coplanar split-ring resonator and conducting strip has been used as metamaterial superstrate. With the use of metamaterial superstrate, the bandwidth of the antenna is increased by 48% through simulation and 22% experimentally. The broadside radiation pattern of the antenna is converted into directive radiation pattern with reduced beamwidth when metamaterial superstrate is used. The peak gain of the antenna is also enhanced by 33% through simulation and 31% experimentally with the use of metamaterial superstrate. © 2014 Wiley Periodicals, Inc.