{"title":"Passive and Lossless, Closed Metasurfaces for Illusion Electromagnetics","authors":"J. Budhu, L. Szymanski, A. Grbic","doi":"10.23919/EuCAP57121.2023.10133421","DOIUrl":null,"url":null,"abstract":"A two stage algorithm for the design and optimization of three-dimensionally contoured metasurfaces is presented. The first stage involves integral equation modeling and a moment method solution resulting in a local active/lossy design. The second stage involves optimization. It uses the gradient descent method and a semi-analytic gradient calculation using the adjoint variable method to obtain a non-local passive/lossless metasurface design with identical far field performance to the local active/lossy design. An example of an electromagnetic illusion is presented for a cubical metasurface which scatters the fields of a PEC sphere.","PeriodicalId":103360,"journal":{"name":"2023 17th European Conference on Antennas and Propagation (EuCAP)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2023 17th European Conference on Antennas and Propagation (EuCAP)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.23919/EuCAP57121.2023.10133421","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
A two stage algorithm for the design and optimization of three-dimensionally contoured metasurfaces is presented. The first stage involves integral equation modeling and a moment method solution resulting in a local active/lossy design. The second stage involves optimization. It uses the gradient descent method and a semi-analytic gradient calculation using the adjoint variable method to obtain a non-local passive/lossless metasurface design with identical far field performance to the local active/lossy design. An example of an electromagnetic illusion is presented for a cubical metasurface which scatters the fields of a PEC sphere.