Title :
Growing evanescent waves in continuous transmission-line grid media
Author :
Andrade, Trevor ; Grbic, Anthony ; Eleftheriades, George V.
Author_Institution :
Sr. Dept. of Electr. & Comput. Eng., Univ. of Toronto, Ont., Canada
Abstract :
We demonstrate the growth of evanescent waves in a backward-wave medium which consists of a printed continuous transmission-line (TL) grid without any embedded lumped elements (chip or printed) or vias. This proposed medium is referred to as a backward-wave transmission-line (BWTL) grid. When such a BWTL medium is sandwiched between two complementary forward-wave transmission-line (FWTL) grids, growing evanescent waves are supported in the BWTL medium. Analysis and microwave simulations verify the growth of evanescent waves including in the realistic case of lossy TLs. The proposed BWTL medium is easy to construct and inherently scalable with frequency.
Keywords :
metamaterials; periodic structures; plasmons; transmission line theory; backward-wave medium; backward-wave transmission-line grid; continuous transmission-line grid media; evanescent waves; forward-wave transmission-line grids; left-handed metamaterials; microwave simulations; negative refraction; periodic structures; plasmons; printed continuous transmission-line grid; Analytical models; Dispersion; Equations; Frequency; Impedance; Lenses; Metamaterials; Permeability; Plasmons; Transmission lines;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2004.842864
