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Design of a printed dual-band coupled-line coupler with generalised negative-refractive index transmission lines

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2 Author(s)
Ryan, C.G.M. ; Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada ; Eleftheriades, G.V.

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.

Published in:

Microwaves, Antennas & Propagation, IET  (Volume:6 ,  Issue: 6 )