2023年广东省毫米波与太赫兹重点实验室专业系列讲座

时间：2023年4月14日（周五）下午3:00pm-6:00pm

地点：逸夫人文馆报告厅, 华南理工大学五山校区

香港城市大学陆贵文教授报告

报告题目：An On-Body Matched Differentially-Fed Magneto-Electric Dipole Antenna for Head Imaging Systems

报告人：陆贵文教授（英国皇家工程院院士, IEEE Fellow；Chair Professor, Department of Electrical Engineering，City University of Hong Kong, Hong Kong, China）

报告摘要：

An on-body matched differentially-fed magneto-electric (ME) dipole antenna is proposed for the head imaging system to detect intracranial hemorrhage (ICH). The ME dipole with its differential feed achieves a wide impedance bandwidth of 137% from 0.45 GHz to 2.4 GHz. The antenna exhibits unidirectional and symmetrical radiation patterns in the near-field region, leading to a stable main beam toward the 2D imaging domain inside the human head. The high front-to-back ratio (FBR) above 18 dB is realized in the whole frequency band by this antenna. The values of specific absorption rate (SAR) always remain safe level under 0.82 W/kg in the entire band with an input power of 10 dBm. To validate the detection capability of the proposed antenna, a head imaging system composed of eight antenna elements in a co-polarization state is designed and fabricated. The reconstructed two-dimensional images of the head interior using a confocal imaging algorithm demonstrate the successful detection and localization of the circular bleeding area as small as 3 mm in radius numerically and 5 mm in radius experimentally, and it has the capability to detect multiple bleeding areas of the human brain, which indicates the head imaging system has the potential to be used in clinical trials.

报告人简介：

Kwai-Man Luk is a Fellow of the UK Royal Academy of Engineering and a Fellow of the Hong Kong Academy of Engineering Science. He received the B.Sc.(Eng.) and Ph.D. degrees in electrical engineering from The University of Hong Kong in 1981 and 1985, respectively. He served as Head of the Department of Electronic Engineering from 2004 – 2010 and founding Director of State Key Laboratory of Millimeter Waves from 2008 – 2013, and he is currently Acting Head and Chair Professor of the Electrical Engineering Department at the City University of Hong Kong. His recent research interest is mainly on the design of advanced antennas for wireless connectivity. Professor Luk was awarded the 2000 Croucher Foundation Senior Research Fellowship in Hong Kong. He received the 2011 State Technological Invention Award (2nd Honor) of China. He is the recipient of the 2017 IEEE APS John Kraus Antenna Award for the invention of the L-shaped probe-fed patch antenna and magnetoelectric dipole. He received the prestigious Ho Leung Ho Lee Prize for Science and Technology Progress in 2019 and the 14th Guanghua Engineering Science and Technology Prize in 2022 in China. He was Lead Guest Editor for the special issue on “Antennas in Wireless Communications” published by the Proceedings of the IEEE in July 2012, and for the special issue on “Advanced Antennas for Wireless Connectivity” published by Engineering in April 2022. He is a Deputy Editor-in-Chief of PIERS journals. He served as reviewer of numerous technical journals including Nature Communications. Professor Luk is Fellow of the Hong Kong Institution of Engineers (HKIE), the Chinese Institute of Electronics (CIE), the Institution of Engineering and Technology (IET), the Institute of Electrical and Electronics Engineers (IEEE) and the Electromagnetics Academy (EMA). He is an elected AdCom Member and the Distinguished Lecturer Program Chair of the IEEE Antennas and Propagation Society since January 2021.

香港城市大学梁国华教授报告

报告题目：Designs of Antennas with Novel Metal Lens

报告人：梁国华教授（IEEE Fellow；Chair Professor, Department of Electrical Engineering，City University of Hong Kong, Hong Kong, China）

报告摘要：

Wideband high-gain antennas are required for point-to-point wireless communication systems. In this talk, a new open-horn antenna integrated with a metal lens is presented. The metal lens consist of sub-channels, and the equal-path-length condition is enforced for all of the sub-channels to obtain a wideband high-gain antenna. In addition, the magnitude- and phase-distributions are separately controlled by different parts of the antenna to obtain a uniform E-field magnitude distribution at the radiating aperture. To reduce the sidelobe level, an improved version is obtained by designing a tapered E-field magnitude distribution. The original and improved designs were fabricated with the 3-D metal printing technique. Omnidirectional antennas are widely used in wireless communication systems because they can provide full azimuthal coverage. At millimeter-wave frequencies, a higher gain is needed to compensate for the high atmosphere propagation loss. In this talk, an omnidirectional antenna integrated with a metal lens will also be presented. It can be used in remote areas where the populations are widely dispersed. Both measured and simulated results will be provided for each design, and reasonable agreement between them is obtained

报告人简介：

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 Chair Professor. 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 the Technical Program Chair, 2008 Asia-Pacific Microwave Conference, Hong Kong, and the Technical Program Co-Chair, 2006 IEEE TENCON, Hong Kong. He was an Editor for HKIE Transactions and a Guest Editor of IET 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), which is the most prestigious journal in the field. 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 IEEE AP-S Eugene F. Knott Memorial Pre-Doctoral Research Award and best paper awards in international/regional conferences. He is a Fellow of IEEE.

香港城市大学黄衡博士报告

报告题目：Functional-Material Integrated High-Frequency Devices for Millimeter-wave and Terahertz Applications

报告人：黄衡博士（Associate Professor, Department of Electrical Engineering Deputy Director,State Key Laboratory of Terahertz and Millimeter Waves，City University of Hong Kong, Hong Kong, China）

报告摘要：

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.

报告人简介：

Hang Wong received a Ph.D. degree from City University of Hong Kong in 2006. He was an acting assistant professor in the Department of Electrical Engineering, Stanford University, in 2011. 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 University of Waterloo; Canada, University of College London, UK; and University of Limoges, France in 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 250 papers, 22 patents, and 2 book chapters, with Google citations of 6700+ and an H-index of 46. 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. Dr. Wong’s 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. Parts of his antenna inventions were adopted by industry leaders to satellite navigation system, wireless sensing network, and 5G MIMO base-station antenna systems. He was awarded the top 2% most-cited scientist by Stanford University in 2021 and 2022.