{"title":"A modular antenna for near-field UHF-RFID smart point readers","authors":"A. Michel, P. Nepa, M. Pino","doi":"10.1109/APS.2016.7696176","DOIUrl":null,"url":null,"abstract":"A novel configuration of a Modular Antenna proposed for NF UHF-RFID desktop reader applications is here described. Specifically, a spiral Travelling Wave Antenna (TWA) is used to generate a strong and uniform field in proximity of the antenna surface. Then, such a microstrip transmission line feeds four resonating curved slot antennas placed close to the spiral TWA and 90-degree rotated with respect to the desktop reader antenna center, through a series-feeding connection. In order to radiate a circularly polarized field, the four slots are fed with the same current amplitude and with a 90-degree phase-shift (sequential rotation feeding technique). To make the antenna scalable, the spiral TWA is extended beyond each slot antenna, so spreading the generated field in a large and arbitrarily shaped area.","PeriodicalId":6496,"journal":{"name":"2016 IEEE International Symposium on Antennas and Propagation (APSURSI)","volume":"57 1","pages":"935-936"},"PeriodicalIF":0.0000,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2016 IEEE International Symposium on Antennas and Propagation (APSURSI)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APS.2016.7696176","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
A novel configuration of a Modular Antenna proposed for NF UHF-RFID desktop reader applications is here described. Specifically, a spiral Travelling Wave Antenna (TWA) is used to generate a strong and uniform field in proximity of the antenna surface. Then, such a microstrip transmission line feeds four resonating curved slot antennas placed close to the spiral TWA and 90-degree rotated with respect to the desktop reader antenna center, through a series-feeding connection. In order to radiate a circularly polarized field, the four slots are fed with the same current amplitude and with a 90-degree phase-shift (sequential rotation feeding technique). To make the antenna scalable, the spiral TWA is extended beyond each slot antenna, so spreading the generated field in a large and arbitrarily shaped area.
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