Implementation and Characterization of a Two-Dimensional Printed Circuit Dynamic Metasurface Aperture for Computational Microwave Imaging

Timothy A. Sleasman, Mohammadreza F. Imani, Aaron V. Diebold, Michael Boyarsky, Kenneth P. Trofatter, David R. Smith

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We present the design, fabrication, and experimental characterization of a 2-D, dynamically tuned, metasurface aperture, emphasizing its potential performance in computational imaging applications. The dynamic metasurface aperture (DMA) consists of an irregular, planar cavity that feeds a multitude of tunable metamaterial elements, all fabricated in a compact, multilayer printed circuit board process. The design considerations for the metamaterial element as a tunable radiator, the associated biasing circuitry, as well as cavity parameters are examined and discussed. A sensing matrix can be constructed from the measured transmit patterns, the singular value spectrum of which provides insight into the information capacity of the apertures. We investigate the singular value spectra of the sensing matrix over a variety of operating parameters, such as the number of metamaterial elements, number of masks (aka tuning states), and number of radiating elements. After optimizing over these key parameters, we demonstrate computational microwave imaging of simple test objects.

Original languageEnglish (US)
Article number9211779
Pages (from-to)2151-2164
Number of pages14
JournalIEEE Transactions on Antennas and Propagation
Volume69
Issue number4
DOIs
StatePublished - Apr 2021
Externally publishedYes

Keywords

  • Aperture antennas
  • holography
  • image reconstruction
  • microwave antennas
  • microwave imaging
  • multiplexing
  • radar imaging
  • statistical distributions

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'Implementation and Characterization of a Two-Dimensional Printed Circuit Dynamic Metasurface Aperture for Computational Microwave Imaging'. Together they form a unique fingerprint.

Cite this