{"title":"Analysis on power harvesting circuits with tunable matching network for improved efficiency","authors":"Ping Zhao, T. Hollstein, M. Glesner","doi":"10.1109/RME.2009.5201312","DOIUrl":null,"url":null,"abstract":"This paper presents the necessity and potential of using tunable matching network in UHF RFID transponders. A compact I/V model for diode-connected MOSFET in strong inversion and sub-threshold regions, which is based on the UMC 0.13-µm technology, is utilized to analyze the influence of the dynamic load to the performance of the power harvesting circuit. A direct dependence of the voltage sensitivity on the varying load current has been found and formulated. The dependence suggests the necessity of optimizing dynamically the impedance matching network between the antenna and the rectifier according to the transponder operation status. A concept of the operationcontrolled tunable matching network is finally proposed.","PeriodicalId":245992,"journal":{"name":"2009 Ph.D. Research in Microelectronics and Electronics","volume":"7 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2009-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"9","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2009 Ph.D. Research in Microelectronics and Electronics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/RME.2009.5201312","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 9
Abstract
This paper presents the necessity and potential of using tunable matching network in UHF RFID transponders. A compact I/V model for diode-connected MOSFET in strong inversion and sub-threshold regions, which is based on the UMC 0.13-µm technology, is utilized to analyze the influence of the dynamic load to the performance of the power harvesting circuit. A direct dependence of the voltage sensitivity on the varying load current has been found and formulated. The dependence suggests the necessity of optimizing dynamically the impedance matching network between the antenna and the rectifier according to the transponder operation status. A concept of the operationcontrolled tunable matching network is finally proposed.
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