![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
The far field characteristics of an axially slotted circular or elliptical antenna coated with multi-dielectric layers are investigated. The fields in the various regions are expressed in terms of Mathieu functions. The unknown field expansion coefficients in every region are obtained by applying the boundary conditions at various surfaces. Numerical results are obtained for the radiation pattern, aperture conductance and antenna gain for the case of conventional or metamaterials coatings. The obtained numerical results show that slotted antenna coated with multi-dielectric layers could have higher gain and lower sidelobes for specific parameters than single layered antenna.