Aperture synthesis with a monochromatic metasurface imaging system for 3D near-field imaging

Michael Boyarsky, Timothy Sleasman, Laura Pulido-Mancera, Aaron V. Diebold, Mohammadreza F. Imani, David R. Smith

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Microwave imaging systems have become increasingly prevalent owing to their ability to obtain 3D images while penetrating optically-opaque materials. These capabilities have motivated the development of various microwave imaging systems for applications ranging from security screening to biomedical imaging. Recent demonstrations have evidenced the idea that metasurface apertures can improve the hardware characteristics of microwave imaging systems due to their lightweight, low-cost, and planar nature. While metasurfaces can improve the antenna hardware, the large spectral bandwidth required for microwave imaging still incurs complex, costly, and performance-limiting RF components. To address the drawbacks inherent to using a large bandwidth, recent works have suggested that near-field microwave imaging can be performed at a single frequency point. In this work, monochromatic imaging is demon-strated by deploying two metasurface apertures to form a near-field microwave imaging system. By leveraging the unique radiation patterns emitted by metasurfaces, a pair of metasurface antennas, one acting as a transmitter and the other as a receiver, can acquire range and cross range information with measurements taken at a single frequency. We will show that this operation can then be supplemented by introducing aperture synthesis in the height direction to obtain fully 3D images. To account for the unusual illumination strategy, a reconstruction algorithm based on the range migration algorithm is formulated and implemented to enable ecient reconstruc-tion of 3D images. Ultimately, the metasurface hardware, aperture synthesis, and monochromatic operation are combined to form an imaging system with high performance capabilities, without requiring complex and costly hardware.

Original languageEnglish (US)
Title of host publicationPassive and Active Millimeter-Wave Imaging XXI
EditorsDavid A. Wikner, Duncan A. Robertson
PublisherSPIE
ISBN (Electronic)9781510617797
DOIs
StatePublished - 2018
Externally publishedYes
EventPassive and Active Millimeter-Wave Imaging XXI 2018 - Orlando, United States
Duration: Apr 18 2018Apr 19 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10634
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferencePassive and Active Millimeter-Wave Imaging XXI 2018
CountryUnited States
CityOrlando
Period4/18/184/19/18

Keywords

  • 3D Imaging
  • Metamaterials
  • Microwave Imaging
  • Reconfigurable An-tennas
  • Synthetic Aperture Radar

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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