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Proceedings Paper

A negative refractive index metamaterial wave plate for millimetre-wave applications
Author(s): I. Mohamed; G. Pisano; M. W. Ng; B. Maffei; V. Haynes; F. Ozturk
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Paper Abstract

By use of a metamaterial based on the ‘cut wire pair’ geometry, highly birefringent wave plates may be constructed by virtue of the geometry’s ability of having a negative and positive refractive index along its perpendicular axes. Past implementations have been narrow band in nature due to the reliance on producing a resonance to achieve a negative refractive index band and the steep gradient in the phase difference that results. In this paper we attempt to design and manufacture a W-band quarter wave plate embedded in polypropylene that applies the Pancharatnam method to increase the useable bandwidth. Our modelling demonstrates that a broadening of the phase difference’s bandwidth defined as the region 90° ± 2° is possible from 0.6% (101.7 GHz – 102.3 GHz) to 7.8% (86.2 GHz – 93.1 GHz). Our experimental results show some agreement with our modelling but differ at higher frequencies.

Paper Details

Date Published: 5 October 2012
PDF: 7 pages
Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 845228 (5 October 2012); doi: 10.1117/12.926931
Show Author Affiliations
I. Mohamed, The Univ. of Manchester (United Kingdom)
G. Pisano, The Univ. of Manchester (United Kingdom)
M. W. Ng, The Univ. of Manchester (United Kingdom)
B. Maffei, The Univ. of Manchester (United Kingdom)
V. Haynes, The Univ. of Manchester (United Kingdom)
F. Ozturk, The Univ. of Manchester (United Kingdom)


Published in SPIE Proceedings Vol. 8452:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI
Wayne S. Holland, Editor(s)

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