Size Reduction of Square Microstrip Patch Antenna by Using Metamaterials Structure

The focus of this study is to investigate size reduction of Conventional Microstrip Patch Antenna (CMPA), using metamaterial structure. Metamaterial is a Complementary Split Ring Resonator (CSRR) unit cell which has negative permittivity (ε <0) and positive permeability (μ >0). The CSRR response is verified in simulation based on scattering parameters by using Nicolson-Ross-Weir (NRW) method. Results show that the relative permittivity is negative at the resonant frequency of CSRR. This study also presents the design and simulation of the CMPA and Miniaturized Microstrip Patch Antennas (MMPA) at 5.15 GHz resonant frequency. The reduction ratio reaches to 80.7 % by applying metamaterial structure via CSRR in the substrate. Those antennas were simulated using Computer Simulation Technology Microwave Studio (CST MWS).