Abstract
This work presents a novel symmetrical circular-shaped metamaterial design with dual resonance frequencies for the X-and Ku-band applications. The fast-growing technology in communication systems has encouraged researchers to conduct various studies in the related bands. Therefore, this research emphasis is to design a compact 8 × 8 mm2 sized metamaterial design that can be applied to the communications system. A total of five distinct circular-shaped metamaterial (CM) structures were constructed on 1.524 mm thick Rogers RT6002 material to gain the objective of this investigation. Meanwhile, investigation of the metamaterial electromagnetic properties and effective medium parameters were carried out by utilising Computer Simulation Technology Microwave Studio (CST) software. Several design constraints and parameters were nominated, and each parameter variation was analysed in the present paper. Based on the numerical simulation data, the proposed CM unit cell manifested dual-resonance frequencies precisely at 8.667 GHz (at X-band) and 13.835 GHz (at Ku-band). Furthermore, the validation procedure was carried out by comparing the measured and simulated results and the outcome clearly shows that the second resonance frequency was increased by 0.336 GHz while the first frequency was reduced by 0.071. In the meantime, the CM design was simulated in High-frequency Structure Simulator (HFSS) to validate the numerical result. There were slight differences occurred among the simulation results of both software and the comparison was largely in agreement. The introduced CM design manifests left-handed characteristics for all peak values. Proving the CM design reaches the goal of this scientific study and can be used in communication system applications.