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Proceedings Paper

Free space microwave focusing by a negative-index gradient lens
Author(s): T. Driscoll; D. N. Basov; P. M. Rye; S. Nemat-Nasser; D. Schurig; D. R. Smith
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Paper Abstract

Metamaterial structures designed to have simultaneously negative permittivity and permeability are known as left-handed materials. Their complexity and our understanding of their properties have advanced rapidly to the point where direct applications are now viable. We present a radial gradient-index (GRIN) lens with an index-of-refraction ranging from -2.67(edge) to -0.97(center). Experimentally, we find the lens can produce field intensities at the focus that are greater than that of the incident plane wave. These results are obtained at 10.45 GHz and in excellent agreement with full-wave simulations. This lens is a demonstrate an newly pioneered advanced fabrication technique using conventional printed circuit board (PCB) technology which offers significant design, mechanical, and cost advantages over other microwave lens constructions.

Paper Details

Date Published: 27 September 2006
PDF: 8 pages
Proc. SPIE 6320, Complex Photonic Media, 632005 (27 September 2006); doi: 10.1117/12.680752
Show Author Affiliations
T. Driscoll, Univ. of California/San Diego (United States)
SensorMetrix, Inc. (United States)
D. N. Basov, Univ. of California/San Diego (United States)
SensorMetrix, Inc. (United States)
P. M. Rye, Univ. of California/San Diego (United States)
S. Nemat-Nasser, Univ. of California/San Diego (United States)
D. Schurig, Duke Univ. (United States)
D. R. Smith, Duke Univ. (United States)

Published in SPIE Proceedings Vol. 6320:
Complex Photonic Media
Graeme Dewar; Martin W. McCall; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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