A Compact Split Ring Resonator Loaded Antenna

In recent years, there has been a growing interest for the use of metamaterials in the antenna design. Antenna researchers tried to utilize the metamaterial properties to the maximum extend. It has been proved that metamaterials are a good candidate for the enhancement of antenna performance over the past years. Metamaterial properties are particularly used for miniaturization of the antenna. In this paper, a compact split ring resonator loaded antenna is presented. The proposed structure is designed on an FR4 substrate with dielectric constant 2.4 with thickness 1.6 mm and consists of small patch and circular SRR. The antenna resonates at 15.5 GHz without SRR. After loading by SRR resonant frequency is reduced to 10.35 GHz. The reduction in resonant frequency is 33.22%. The distance between the patch and SRR is very important in determining the resonant frequency. Coaxial feeding is used for the excitation of the antenna. Simulation tool based on the method of moment (MOM)-Zeland IE3d 12.0 has been used to analyze and optimize the antenna. The fundamental parameters of the antenna such as return loss, VSWR, gain, radiation pattern are obtained and all meets the acceptable antenna standard.