Bandwidth enhancement of RMPA using ENG metamaterials at THz

Left handed materials which have both negative permittivity and permeability, have been the area of potential research over a decade. As the technology advances, metamaterials have capability to vastly impact the field of antennas. This paper elucidates antenna parameter optimization using metamaterial (MTM) embedded in antenna substrate at high frequency (THz). Ansoft HFSS has been used to design and analyse the RMPA (rectangular microstrip patch antenna) with design frequency 227 THz and operating range of 215THz to 239THz having RT duroid (ε_r=2.33) as substrate material Three metamaterials (MTMs), single split, double split and interdigitated, having negative permittivity (Epsilon negative group i.e. ENG) in the given frequency range are embedded in the substrate. Upon incorporation bandwidth widens to around 19% and VSWR improves by approx 5%.