アンテナ・伝搬技術の研究分野においてリフレクトアレー(RA)、トランスミットアレー(TA)、ビーム等の可変型デバイスが注目されています。
今回、香港城市大学テラヘルツ・ミリ波国家重点研究所で開発された最先端のアンテナ技術について、Kwai Man Luk先生とHang Wong先生の２名よりご講演いただくことになりました。お二人はマグネットエレクトリック(ME)ダイポールアンテナの考案者として良く知られております。
まず、Kwai Man Luk先生よりMEダイポールがRA、 TA設計においても魅力的であることを述べていただき、高利得でビームステアラブルなRA,、TA設計について概説していただきます.。
さらにHang Wong先生より機能性材料を用いたミリ波やテラヘルツの可変型，スイッチ型のデバイスの設計例を紹介していただきます。

■日　時：2023年9月6日　14:30-17:00
■会　場：熊本大学　黒髪南地区　共用棟(黒髪南W3) 1F 講義室　（リンク先50番の建物）
■聴講料：無料（会員、非会員問わず聴講可能）

■講　師：Prof. Kwai Man Luk (City University of Hong Kong)
■演　題：Design of Wideband Reflectarrays and Transmitarrays of Magnetoelectric Dipole Antennas

■講演概要 
The magnetoelectric (ME) dipoles have been successfully developed for mobile communications, radars and sensing connectivity with many distinguished features including wide bandwidth, low cross polarization, low back radiation and stable gain and beamwidth over the operating frequencies. Recently, it has been demonstrated that the ME dipoles are also attractive for the design of reflectarrays (RA) and transmitarrays (TA) that are of topical interest in the antenna community. In this talk, design of high-gain, beam-steerable reflectarrays and transmitarrays operating at microwaves and millimeter waves based on the ME dipoles will be reviewed.
First, the basic operating principles of ME dipole, RA and TA are introduced. Next, the ME-diole-based TRA and TA designs are discussed, with a few samples presented in details, including fixed-beam designs with high aperture efficiency and reconfigurable designs with wide-angle scanning capability. It will be demonstrated that the use of ME dipoles instead of conventional microstrip antennas can significantly enhance the bandwidth of the antenna arrays. Possible future work will also be shared.

■講師紹介
Prof.Kwai Man Luk (Fellow, IEEE) received the B.Sc. and Ph.D. degrees in electrical engineering from The University of Hong Kong, Hong Kong, in 1981 and 1985, respectively.,He joined the Department of Electronic Engineering, City University of Hong Kong, Hong Kong, in 1985, as a Lecturer. Two years later, he moved to the Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong, where he spent four years. In 1992, he returned to the City University of Hong Kong, where he served as the Head for the Department of Electronic Engineering from 2004 to 2010, and the Director for the State Key Laboratory of Millimeter Waves from 2008 to 2013, and is currently the Acting Head and the Chair Professor of the Department of Electrical Engineering. His recent research interests include designs of microstrip patch antennas, magneto-electric dipole antennas, dense dielectric patch antennas, and open resonator antennas.,Prof. Luk is a fellow of the U.K. Royal Academy of Engineering; the Hong Kong Academy of Engineering Science; the Chinese Institute of Electronics, China; the Institution of Engineering and Technology, U.K.; and the Electromagnetics Academy, USA. He was the Chief Guest Editor of a special issue on “Antennas in Wireless Communications” published in the Proceedings of the IEEE in July 2012 and a special issue on “Advanced Antennas for Wireless Connectivity” published in Engineering. He is the Deputy Editor-in-Chief of Photonics and Electromagnetics Research Symposium (PIERS) journals and an Associate Editor of IET Microwaves, Antennas and Propagation

■講　師：Prof. Hang Wong (City University of Hong Kong)
■演　題：Functional-Material Integrated High-Frequency Devices for Millimeter-wave and Terahertz Applications

■講演概要
Technology market forecasts high-frequency products will boost up rapidly in the coming decades not only the popular microwave electronics but also that of unreleased millimeter-wave and terahertz inventions. Scientists put hard efforts to demonstrate both feasibility and capability of the new allocated frequency spectrum by ITU from 110 to 450 GHz that can be commercialization through the introduction of emerging applications of wireless systems such as 6G communications, terahertz imaging, millimeter-wave detection and sensing, low-orbit space communications, intelligent ultra-fast wireless, green energy network, etc. In this talk, the speaker is going to introduce recent high-frequency electronic developments by other world-leading antenna research groups and share state-of-the-art antenna technologies invented at the State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong. Breaking through the bottleneck of PIN diode at high-frequency devices, the speaker will demonstrate some examples of using functional materials to design millimeter-wave and terahertz reconfigurable, tunable, and switchable devices including antennas, metasurfaces, polarizers, modulators, and filters.

■講師紹介
Prof. Hang Wong received a Ph.D. degree from City University of Hong Kong in 2006. He joined the Department of Electrical Engineering in 2012 and is currently an Associate Professor and the Deputy Director of the State Key Laboratory of Terahertz and Millimeter Waves. He had several visiting professorships at Stanford University, USA; University of Waterloo, Canada; University of College London, UK; and University of Limoges, France in 2011, 2013, 2014, and 2015 respectively. His research interests include designs of wideband antennas, reconfigurable antennas, millimeter-wave antennas, terahertz antennas, functional-material antennas and related applications. He has published over 280 papers, 30 patents, and 2 book chapters, with Google citations of 7000+ and an H-index of 47. He is the chair of the IEEE Antennas and Propagation /Microwave Theory and Techniques (MTT) Chapter of Hong Kong, the IEEE APS Region-10 Representative, the associate editor of IEEE Transactions on Antennas and Propagation (TAP), and the associate editor of IEEE Antenna Wireless Propagation Letters (AWPL). Dr. Wong was the general co-chair of 2020 Asia Pacific Microwave Conference; and the general chair of 2021 Cross Strait Radio Science and Wireless Technology Conference. His contribution has been highly recognized by numerous technical awards and best paper awards at the international conferences at the countries of USA, UK, France, Korea, Japan, and China. He pioneered and was a co-inventor of L-probe dual-polarization antenna technology in 2004, magneto-electric antenna technology in 2006, and the first generation of Beidu’s handheld antennas in 2008, thin-intelligent antenna in 2013, reconfigurable-metal-liquid antenna in 2018, and programmable-terahertz meta in 2020. Parts of his antenna inventions were adopted by industry leaders to satellite navigation system, wireless sensing network, 5G MIMO base-stations, and auto-payment systems for vehicles. He was awarded the top 2% most-cited scientist by Stanford University in 2021 and 2022.

当日会場まで直接お越し下さい。

■主催：(一社)電子情報通信学会九州支部
■共催：IEEE AP-S Fukuoka Chapter
■協賛：IEICE　アンテナ・伝播研究会

熊本大学　福迫 武
fukusako@cs.kumamoto-u.ac.jp