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Proceedings Paper

A reconfigurable millimeter-wave spotlight metasurface aperture integrated with a frequency-diverse microwave imager for security screening
Author(s): Okan Yurduseven; Daniel L. Marks; Jonah N. Gollub; David R. Smith
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Paper Abstract

In this paper, a spotlight imaging system integrated with a frequency-diverse aperture is presented for security-screening applications. The spotlight imager consists of holographic metasurface antennas that can dynamically be tuned to radiate spotlight patterns allowing the extraction of high-resolution images from a constrained field-of-view (FOV). The reconfigurable holographic metasurface antennas consist of a metasurface layer used to modulate the guided-mode reference to an aperture field of interest producing the desired radiated wavefronts. The reconfigurable operation is achieved in an all-electronic manner without the need for any mechanical moving apparatus or phase shifting circuits. The spotlight aperture operates at a single frequency, 75 GHz, within the W-band frequency regime (75 – 110 GHz) and is used for the high-resolution identification of threat objects while the frequency-diverse aperture operates at K-band frequencies (17.5 – 26.5 GHz) and is used for low-resolution detection purposes. The scene to be imaged is first interrogated using the K-band aperture at low resolution and the constrained-FOV is imaged using the W-band system to achieve the identification of threat objects.

Paper Details

Date Published: 11 May 2018
PDF: 9 pages
Proc. SPIE 10634, Passive and Active Millimeter-Wave Imaging XXI, 1063406 (11 May 2018); doi: 10.1117/12.2303588
Show Author Affiliations
Okan Yurduseven, Duke Univ. (United States)
Daniel L. Marks, Duke Univ. (United States)
Jonah N. Gollub, Duke Univ. (United States)
David R. Smith, Duke Univ. (United States)

Published in SPIE Proceedings Vol. 10634:
Passive and Active Millimeter-Wave Imaging XXI
David A. Wikner; Duncan A. Robertson, Editor(s)

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