Wide angle impedance matching metamaterials for waveguide-fed phased-array antennas

TitleWide angle impedance matching metamaterials for waveguide-fed phased-array antennas
Publication TypeJournal Article
Year of Publication2010
AuthorsS. Sajuyigbe, M. Ross, P. Geren, S..A. Cummer, M.H.. Tanielian, D.R. Smith
JournalIET Microwaves, Antennas & Propagation
Volume4
Issue8
Pagination1063
Date Published2010
Abstract

This work investigates the gains realisable through the use of artificially structured materials, otherwise known as metamaterials, in the wide angle impedance matching (WAIM) of waveguide-fed phased-array antennas. The authors propose that the anisotropic properties of a metamaterial layer, when designed appropriately, can be employed to achieve impedance matching at a wide contiguous range of phased-array antenna transmission angles. Simulation and numerical results show that an optimised impedance match over a broad angular range can be readily achieved using a doubly uniaxial (magnetic and electric) anisotropic layer, an outcome not found accomplishable when an optimised isotropic dielectric layer is used. The authors propose the possibility of using metamaterials to achieve anisotropic WAIM layer configurations, and the authors show, using two simple uniaxial designs, that a metamaterial layer over the phased-array gives performance characteristics similar to its homogeneous anisotropic effective medium counterpart.

Short TitleIET Microw. Antennas Propag.