Design and development of metamaterial inspired planar antennas for wireless communications

Abstract

Left-handed materials have mostly attracted researchers in the last decade because of their extraordinary properties, such as negative index of refraction, negative electrical permittivity, and negative magnetic permeability. They are considered artificial composite or structured material that exhibits properties, not found in naturally occurring materials. Left-handed material was first termed by Veselago in 1968, who predicted that there exists such a medium in which the magnetic field, electric field, and wave vectors form a left-handed orthogonal set. newlineThe basic design goal of the research is to explore the capabilities of metamaterial for all types of wireless applications such as Global System for Mobile Communication (GSM), Wireless Local Area Network (WLAN), Global Positioning Systems (GPS), and Worldwide Interoperability for Microwave Access (WiMAX), etc. This work primarily discusses the realization of Left-handed material by the Split Ring Resonators (SRRs) designs and Defected Ground Structure (DGS). Different designs were developed using the unit cell concept and arrays of split-ring resonators for better antenna parameter results. newlineAnother design mainly focuses on a multi-layered SRR structure. A comparison of the different designs with and without partial ground plane has been carried out; simulated and fabricated results for antenna prototypes are also discussed. All proposed antenna designs are fabricated to validate the simulated results obtained from simulation software. newline