Journal
APPLIED PHYSICS LETTERS
Volume 82, Issue 12, Pages 1815-1817Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1561167
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We show the enhancement of evanescent waves by a realizable negative-refractive-index (NRI) medium consisting of a periodic 2-D L,C loaded transmission-line (TL) network. This network is referred to as a dual TL structure. Growing evanescent waves within the dual TL structure are predicted analytically and demonstrated through simulation. These findings confirm that the dual TL structure is not simply a phase compensator that corrects the phase of propagating waves, but is in fact a NRI medium, since it also enhances the amplitudes of evanescent waves. This structure is a likely candidate for microwave subwavelength focusing and imaging applications. (C) 2003 American Institute of Physics.
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