Antenna applications of negative-refractive-index transmission-line structures
AuthorEleftheriades, G. V.
Antoniades, Marcos A.
SourceIET Microwaves, Antennas and Propagation
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A number of new antenna-related applications that have recently been developed at the University of Toronto based on the concept of negative-refractive-index transmission-line metamaterials are reviewed. These include non-radiating phase-shifting lines that can produce either a positive or a negative phase-shift while exhibiting a broadband linear phase response, as well as compact and broadband series power dividers and associated planar series-fed printed dipole arrays with reduced beam-squinting. Moreover, a fully printed electrically small ring antenna featuring vertical polarisation and good radiation efficiency is also described. © 2007 The Institution of Engineering and Technology.