Characterization of thin slab artificial dielectric material using rectangular waveguide

This paper focuses on characterization of relative permittivity for thin slab artificial dielectric material using rectangular waveguide. The slab artificial dielectric material constructed of circular patch metallic copper on a rectangular shape of various thin materials is piled up in some configurations and densities. A rectangular waveguide with the dimension of 72.4mm × 34mm is employed as characterization tool. Variable of thin slab artificial dielectric material which will be investigated is thickness between 0.8mm to 8mm, composition using rhombic and orthorhombic, and number of unit cell. From characterization results, it is found that the increase of material thickness decreases its relative permittivity, whilst the orthorhombic composition has higher relative permittivity than the rhombic composition.