JCS_V6_N2_RP6 C. Keerthi G. Guru Prasad R. Nagendra S. Mehtaj Begum Journal on Communication Engineering and Systems 2277-5242 6 2 26 32 Antenna, Metamaterial, Circular Microstrip Antenna, Rogers RT/duroid 5880, HFSS Software Metamaterials are artificial structures and their electromagnetic properties are not present in nature. Employing metamaterials in microstrip antenna substrate will result in the improvement of the antenna parameters like bandwidth, gain, efficiency, etc. A novel design of metamaterial is considered in order to miniaturize a circular microstrip patch antenna. Metamaterial is composed of two nested split hexagons and it is located on a 10 x 10 mm Rogers RT/duroid 5880 substrate with 0.7874 mm thickness and dielectric constant value of 2.2. Here 4 x 4 array of such nested split hexagons is placed on the patch antenna substrate. By using the metamaterial in the antenna structure, the dimension of this proposed antenna is reduced to both half and quadrature compared to a microstrip patch antenna. Here the circular patch antennas loaded by an homogeneous substrate partially filled with negative metamaterials. Metamaterial is preferred because it supports a resounding radiating mode, even if the total size of the radiator is significantly smaller than the wavelength of operation. Here HFSS Software is used for simulation. February - April 2017 Copyright © 2017 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=13471