{"title":"Single-Mode Wireless Sensing by Nonlinear Parity-Time-Symmetric Circuits","authors":"Zhipeng Li, J. S. Ho","doi":"10.1109/APS/URSI47566.2021.9703967","DOIUrl":null,"url":null,"abstract":"Wireless sensing in parity-time-symmetric system by interplay between gain and loss have shown enhanced sensitivity due to the nonlinear response. Here, we report single-mode wireless sensing using nonlinear parity-time-symmetric circuits. We observe an exceptional point where the frequency response of system is nonlinear following square-root-topology. We also observe frequency hopping point by single-mode switching due to the nonlinear saturable gain. We demonstrate wireless pressure sensing with enhanced sensitivity at an EP and HP compared to the traditional wireless sensing without gain. Wireless sensing by parity-time-symmetric circuits shows great potentials for highly sensitive biomedical sensing.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"1 1","pages":"1345-1346"},"PeriodicalIF":0.0000,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APS/URSI47566.2021.9703967","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
Wireless sensing in parity-time-symmetric system by interplay between gain and loss have shown enhanced sensitivity due to the nonlinear response. Here, we report single-mode wireless sensing using nonlinear parity-time-symmetric circuits. We observe an exceptional point where the frequency response of system is nonlinear following square-root-topology. We also observe frequency hopping point by single-mode switching due to the nonlinear saturable gain. We demonstrate wireless pressure sensing with enhanced sensitivity at an EP and HP compared to the traditional wireless sensing without gain. Wireless sensing by parity-time-symmetric circuits shows great potentials for highly sensitive biomedical sensing.