报告摘要

In recent years, dielectric resonator antennas (DRAs) have attracted extensive research interest due to their compact size, high eficiency, and ease of excitation. Among the key design parameters, theoperating firequency plays a critical role. Traditionally, the dielectric waveguide model (DWM) has been employed to calculate the resonant frequencies of various DRA modes based on the dimensions and dielectric constant ε_r  of the antennas. A rectangular DRA can be configured to realize a tri-band operation by exciting the ，，and    modes. When these three modes are properly combined, they can yield a wide bandwidth. To achieve this, three simultaneous transcendental equations, which correspond to the three resonant modes, must be solved to determine the three DRA dimensions, leading to a unique design solution.

In this talk, we address the inverse problem: determining the DRA dimensions of a tri-mode rectangular DRA given the dielectric constant ε_r  and three target resonant frequencies. The methodology and results of this approach will be presented in detail. Limitations of the tri-mode DRA design will also be presented in this talk.

个人简介

Prof. LEUNG, Kwok Wa received his B.Sc. degree in Electronics and Ph.D. degree in Electronic Engineering from the Chinese University of Hong Kong in 1990 and 1993, respectively. In 1994, he joined the Department of Electrical Engineering at City University of Hong Kong, where he is currently a ChairProfessor. He was the Associate Head of the Department and Associate Dean (Research) of College of Engineering. In 2006, he was a Visiting Professor in the Department of Electrical Engineering, The Pennsylvania State University, USA.
   Professor Leung was the Chair of the IEEE AP/MTT Hong Kong Joint Chapter for the years of 2006 and 2007. He was a General Chair of 2022 lEEE Conference on Antenna Measurements and Applications, Guangzhou, the Technical Program Chair of 2008 Asia-Pacifc Microwave Conference, Hong Kong, and the Technical Program Co-Chair of 2006 IEEE TENCON, Hong Kong. He was an Editor for HKlE Transactions and a Guest Editor of lET Microwaves, Antennas and Propagation. He was an Associate Editor for the IEEE Antennas and Wireless Propagation Letters and IEEE Transactions on Antennas and Propagation (TAP). He was selected as outstanding Associate Editor of the TAP twice in 2009 and 2010. From 2013 to 2016, Prof. Leung was appointed as the Editor-in-Chief of the TAP.
    Prof. Leung received the USRI Young Scientists Awards in Japan and Russia in 1993 and 1995, respectively. He received the Departmental Outstanding Teacher Awards in 2005, 2010, and 2011. He also received the CityU Research Excellence Award 2013. He was a Distinguished Lecturer of the IEEE Antennas and Propagation Society from 2012 to 2014. He is the leading recipient of the prestigious First Class Award (Natural Science) of the 2016 Higher Education Outstanding Scientific Research Output Awards, the Ministry of Education, China. He was selected as an awardee of the Distinguished Alumni Awards for 2021, Department of Electronic Engineering, The Chinese University of Hong Kong. His students received the 2015 lEEE AP-S Eugene F. Knott Memorial Pre-Doctoral Research Award and best paper awards in international/regional conferences. He is a Fellow of IEEE.