@article{Tamminga_Christensen_Petry_Chang_2021, title={A Hybrid Synthetic Aperture and Time-Reversal MUSIC Algorithm for Subwavelength Radar Imaging}, volume={1}, url={https://www.vajbts.org/index.php/vaJBTS/article/view/14}, DOI={10.51390/vajbts.v1i1.14}, abstractNote={<p>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.</p>}, number={1}, journal={Virginia Journal of Business, Technology, and Science}, author={Tamminga, Nathaniel and Christensen, Brianna and Petry, Sarah and Chang, Enson}, year={2021}, month={Jul.} }