Abstract
Left-handed materials, which have both negative permittivity and permeability, have been the area of potential research over a decade. This paper elucidates the design of a double-negative group (DNG) THz metamaterial, namely, E-shaped, having negative refraction ranging from 34.5 to 37.5 THz. Rectangular microstrip patch antenna (RMPA) with microstrip feed has been designed using Ansoft HFSS with RT Duroid (ϵr = 2.33) as substrate and having the same frequency range as that of the metamaterial's negative region. Upon incorporation of proposed metamaterial's array inside the antenna substrate, bandwidth of antenna increases by 4 THz and directivity of antenna increases by about 43% with E-shaped metamaterial.
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