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:2019-08-01
Journal:IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
Included Journals:SCIE、EI
Volume:18
Issue:8
Page Number:1626-1630
ISSN No.:1536-1225
Key Words:Low-profile antenna; pattern-reconfigurable antenna; quasi-omnidirectional antenna; windmill loop
Abstract:In this letter, a low-profile pattern-reconfigurable antenna has been designed. The antenna is modified from a conventional windmill loop antenna, with the radial arms disconnected at the center and a shorting via added between the top and bottom layers. Three different patterns are controlled by three p-i-n diodes, which are located at the center of the bottom layer and operate as switches. A half-wavelength bent dipole with a reflector provides a boresight radiation with directional pattern on the azimuth plane. The second boresight pattern is obtained by a coupled fed half-wavelength dipole together with another one-wavelength dipole. The radiation nulls of the two boresight patterns are complementary to each other on the azimuth plane. A third pattern with omnidirectional radiation on the azimuth plane is obtained when the current is uniformly distributed along the arcs, forming a typical magnetic dipole. The antenna operates at 2.4 GHz wireless local area network (WLAN) band (2.40-2.485 GHz), with the measured average efficiencies of 82%, 82%, and 80% for the three modes, respectively.
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.
