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Optical Engineering

Optoelectronic imaging using a millimeter-wave, optically controlled, photo-injected Fresnel-zone plate antenna
Author(s): Tom F. Gallacher; Duncan A. Robertson; Graham M. Smith
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Paper Abstract

We present results for a rapid, precise, and wide field-of-view scanning antenna for use at millimeter and submillimeter wavelengths, based on the photo-injected Fresnel-zone plate antenna (piFZPA) method. In this paper, we demonstrate the potential of this technology as a viable solution for a range of applications demanding real-time imagery or high flexibility and beam fidelity at these frequencies. We present proof-of-principle experiments at 94 GHz that incorporate a commercial display technology operating at visible wavelengths. The 100-mm-diameter piFZPA achieves 37-dBi directivity, excellent beam symmetry, beam steering in two dimensions over a ±20-deg field of view, and precise beam control and repeatability. Preliminary results of a piFZPA-based, short-range, 94-GHz, three-dimensional imaging radar are also presented.

Paper Details

Date Published: 7 November 2012
PDF: 7 pages
Opt. Eng. 51(11) 119003 doi: 10.1117/1.OE.51.11.119003
Published in: Optical Engineering Volume 51, Issue 11
Show Author Affiliations
Tom F. Gallacher, Univ. of St. Andrews (United Kingdom)
Duncan A. Robertson, Univ. of St. Andrews (United Kingdom)
Graham M. Smith, Univ. of St. Andrews (United Kingdom)

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