Abstract

Abstract— In this paper, a compact size metamaterialsloaded circular microstrip patch antenna is presented. A complementary splitring resonator is loaded in the ground plane of circular microstrip patchantenna. The unloaded circular microstrip patch antenna resonates at 5.5 GHz,whereas after loading it with complementary split ring resonator, the sameantenna resonates near 5.3GHz with reduced size. The effective footprint of theantenna is reduced by nearly 25% compared to the conventional patch antenna.The gain of the metamaterials loaded antenna structure is 3.5 dB. The antennaprovides a cross polarization isolation of about ≥15 dB at 5.3 GHz. The antennaalso achieves wider axial ratio beam width of 75.5 degrees.

Keyword: Complementary split ringresonators; Microstrip Patch; Metamaterials; Radiation Pattern.