A Hybrid Synthetic Aperture and Time-Reversal MUSIC Algorithm for Subwavelength Radar Imaging

Authors

  • Nathaniel Tamminga Azusa Pacific University
  • Brianna Christensen Azusa Pacific University
  • Sarah Petry Azusa Pacific University
  • Enson Chang Azusa Pacific University

DOI:

https://doi.org/10.51390/vajbts.v1i1.14

Keywords:

TR-MUSIC, CSAR, SAR, RFID, SATR-MUSIC, subwavelength, radar imaging, synthetic aperture

Abstract

A promising chipless RFID approach uses millimeter-wave synthetic aperture radar (SAR) to image metal ink-printed ID tags from a meter or more away. Due to printing cost, it is desirable to minimize the size and spacing of metal patches within a tag, preferably into the subwavelength regime. Although circular SAR (CSAR) has a sharply peaked point response in 2D, its side lobes of closely-spaced targets interfere strongly with each other to distort the image. An alternative 2D subwavelength imaging approach with minimal side lobes is Time-Reversal MUSIC (TR-MUSIC). Traditional TR-MUSIC, however, requires a large number of transmitters and receivers. We propose a hybrid synthetic aperture TR-MUSIC algorithm (SATR-MUSIC) that combines the benefits of both approaches. Using relatively few transceivers, SATR-MUSIC is able to resolve objects separated by approximately  in 2D with minimal background artifacts. It does so by averaging TR-MUSIC’s imaging kernel incoherently over the synthetic aperture.

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Published

2021-07-07

How to Cite

Tamminga, N., Christensen, B., Petry, S., & Chang, E. (2021). A Hybrid Synthetic Aperture and Time-Reversal MUSIC Algorithm for Subwavelength Radar Imaging. Virginia Journal of Business, Technology, and Science, 1(1). https://doi.org/10.51390/vajbts.v1i1.14