Analysis of Bandwidth and Loss in Negative-Refractive-Index Transmission-Line (NRI–TL) Media Using Coupled Resonators

Author

Eleftheriades, George V.

Author_Institution

Dept. of Electr. & Comput. Eng., Toronto Univ., Ont.

Volume

17

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

412

Lastpage

414

Abstract

The bandwidth and loss characteristics of negative-refractive-index transmission-line (NRI-TL) metamaterials are examined in the limit of the model of coupled C-L resonators. It is analytically shown that the tighter the coupling between resonators, the wider the size of the backward passband and the smaller the propagation losses. This establishes that the wider bandwidths and smaller losses that characterize NRI-TL media are due to the tight coupling (i.e., electrical connection) between their constituent C-L loop resonators, rather than the absence of resonators

Keywords

losses; metamaterials; resonators; transmission line theory; backward passband; backward waves; bandwidth characteristic; coupled C-L resonators; coupled resonators; left-handed media; loss characteristics; metamaterials; negative-refractive-index transmission-line media; propagation losses; tight coupling; Bandwidth; Magnetic fields; Magnetic moments; Metamaterials; Mutual coupling; Passband; Polarization; Propagation losses; Transmission lines; Wire; Backward waves; coupled resonators; left-handed media; metamaterials; negative refraction index (NRI); transmission lines (TLs);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2007.897785

Filename

4220698