Hui Li
Professor Supervisor of Doctorate Candidates Supervisor of Master's Candidates
Main positions:信息与通信工程学院副院长
Gender:Female
Alma Mater:Royal Institute of Technology
Degree:Doctoral Degree
School/Department:School of Information and Communication Engineering
Discipline:Communication and Information Systems. Electromagnetic Field and Microwave Technology
Business Address:No. 2, Linggong Road, Dalian University of Technology, Dalian, Liaoning Province; 116024
Contact Information:hui.li@dlut.edu.cn
E-Mail:hui.li@dlut.edu.cn
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Indexed by:期刊论文
Date of Publication:2017-09-23
Journal:IEEE ACCESS
Included Journals:SCIE、EI、Scopus
Volume:5
Page Number:21070-21079
ISSN No.:2169-3536
Key Words:Loop antenna; metallic surface; radio frequency identification (RFID); single-layer antenn; tag antenna; ultra-high frequency (UHF)
Abstract:Simple and low cost tag antenna with long reading distance in various environments is in great demand with its wide applications. This paper describes the design and optimization procedure of a single layer tag antenna, which covers relatively long reading range when mounted on both metallic surface and various dielectrics. The antenna is based on the loop structure, with a small ka of 0.66. Characteristic mode analysis is first performed to inspect how a typical loop structure radiates in free space and on PEC. Antenna structure is then designed based on the characteristics of the loop. Afterward, equivalent circuits of the tag antenna on dielectrics and on metal are extracted, in order to provide guidance for antenna optimization. The proposed tag antenna achieves the maximum reading distance of 6.1 m and 14.1 m, respectively, when mounted on metal and dielectrics with low permittivity. Measurements of the tag antenna were carried out in different environments, including outdoor scenario, indoor scenarios with low and high reflections. The measured results agree reasonably well with the predicted ones. The tag antenna is proved to be competitive in perspective of simple structure, low cost, long reading distance, and tolerance on various background materials.
Hui Li was born in Heilongjiang province, China. She received the B.E. degree in optical engineering from Tianjin University (TJU), China, in 2007 and Ph.D degree in electrical engineering from the Royal Institute of Technology (KTH), Sweden, in 2012. She is currently an associate professor at Dalian University of Technology. Research Interests:Multiple input multiple output systems, millimeter wave antenna, implantable antnena, RFID, theory of characteristic mode and etc.
