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:Journal Papers
Date of Publication:2020-07-01
Journal:IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Included Journals:SCIE
Volume:68
Issue:7
Page Number:5199-5208
ISSN No.:0018-926X
Key Words:Antenna radiation patterns; Antenna feeds; Correlation; Antenna measurements; Mobile handsets; Systematics; Characteristic mode analysis (CMA); feeding arrangement; mobile antennas; pattern synthesis; user effect
Abstract:In this article, a systematic and generally applicable method to synthesize patterns for single antennas is proposed based on characteristic mode analysis (CMA). Both the theoretical analysis and real implementations are taken into consideration. To obtain a desired pattern, we first calculate the weighting coefficient of each mode using the correlation between the characteristic field and the desired pattern. Afterward, the synthesized current and the feeding vector are solved using CMA, providing feeding information, such as feeding numbers, locations, amplitude, and phase. The feeding vector is nonsparse, making practical feeding impossible. In this circumstance, the theory of compressed sensing is applied so that the number of ports can be greatly reduced, and the synthesized pattern is still highly correlated with the desired one. The method is applied to 2-D and 3-D structures, where a mobile handset and a scaled model of the shipboard are utilized as representatives. The prototype of the handset antenna was fabricated and measured, with the desired pattern achieved, having null in the boresight direction and being almost omni-directional on the plane of the chassis. The measured results agree well with the simulated ones. With the synthesized pattern, the handset antenna is robust to the user effects. The method can be generally applied to pattern synthesis for planar and 3-D antennas.
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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.
