Wideband omnidirectinal perforated minkowski fractal dielectric resonator antenna

Abstract

A wideband perforated minkowski fractal dielectric resonator antenna is proposed. The antenna is centrally fed by a probe and operating in quasi TM01δ mode which is similar to the TM01δ mode of cylindrical dielectric resonator antenna. An impedance bandwidth (S11 <; -10 dB) of 2.48 GHz (47%) is obtained and the peak gain varies from 3.6 dBi-4.05 dBi in the matching band with maximum at 5.5 GHz. The antenna radiates like electric monopole, resulting in omnidirectional radiation pattern. The radiation pattern is stable throughout the matching band and cross polarized levels are below -40 dB and -20 dB in xz- and xy-plane, respectively.