Title :
Design of a printed dual-band coupled-line coupler with generalised negative-refractive index transmission lines
Author :
Ryan, C.G.M. ; Eleftheriades, George
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada
Abstract :
A dual-band printed metamaterial coupler made of a microstrip line and a generalised negative-refractive-index (NRI) line is presented. Owing to the presence of two left-handed bands in the generalised negative-refractive-index transmission line (NRI-TL) unit cell, backward coupling occurs over two frequency ranges centred on 2.7 and 4.7-GHz. Measured results for an edge-coupled device are reported; peak coupling levels of -3.5 and -4.4-dB are observed.
Keywords :
coupled transmission lines; metamaterials; microstrip lines; millimetre wave couplers; refractive index; backward coupling; edge-coupled device; generalised negative-refractive index; left-handed bands; metamaterial coupler; microstrip line; printed dual-band coupled-line coupler; transmission lines;
Journal_Title :
Microwaves, Antennas & Propagation, IET
DOI :
10.1049/iet-map.2011.0508
