报告摘要

The talk will begin by covering the origins of periodic arrays as Frequency Selective Surfaces (FSS) and how these simple geometrical periodic elements were first instigated for their implementation in high gain reflector antennas for satellites and base stations. As manufacturing processes and material properties improved implementing them in commercial products became a reality. With regards to low profile antennas, placing a planar FSS at a N/2 distance from a grounded prime radiator increased its gain by about 12-fold. The FSS has now become a Partial Reflecting Surface (PRS) and with the introduction of an Artificial Magnetic Conductor (AMC) ground, the low-profile antenna has become even more slick where the distance of the PRS from the prime radiator reduced to N/4 or even subwavelength. The talk will also cover a new class of arrays (so called metamaterials) with meta-atoms as elements that can be manufactured in situ with advanced state-of-the-art 3D printers. The talk will highlight some salient results of these meta-atoms arrays and as well as bistable auxetic metamaterials for future electronic and medical applications.

个人简介

Professor J. (Yiannis) C. Vardaxoglou (F’12) completed his B.Sc. in Mathematical Physics (1982) and his Ph.D. in Electronics (1985) at the University of Kent, UK. He joined Loughborough University as a lecturer in 1988 and was promoted to Senior Lecturer in 1992 and Professor of Wireless Communications in 1998. He served as the Dean of the School of Electronic, Electrical and Systems Engineering at Loughborough University from 2006-2012. Since 2021 he has been an Emeritus professor at Loughborough University and currently, he is a visiting Professor at the State Key Laboratory of Terahertz and Millimeter Waves, Electrical Engineering Department, City University, Hong Kong.
   He established the 34-year-old Wireless Communications Research (WiCR) group at Loughborough University and founded the Centre for Mobile Communications Research (CMCR). He was the director of Symeta research centre funded by an EPSRC Grand Challenge award, researching in a wide-ranging topic applicable to cutting-edge wireless communications technology. His current research focuses primarily on metamaterial structures, additive manufacturing (3D printing) for RF/micro/mm wave engineering. Symeta collaborates with many internationally leading companies and universities. He was the principal investigator of a prestigious EPSRC’s Grand Challenge £5M (FEC) award: Synthesizing 3D Metamaterials for RF, Microwave and THz Applications,(symeta.co.uk).
    He has served as a consultant to various industries, holds six patents and is the Technical Director of Antrum Ltd. He has attracted research funding from industry and has been awarded 18 EPSRC research grants. He has published over 500 refereed journals and conference proceeding papers (with over 12000 citations) and has written a book on FSS. He was Chairman of the Executive Committee of the IET’s Antennas and Propagation Professional Network in the UK and chaired the IEEE’s distinguish lecturer program of the Antennas and Propagation Society (APS) for five years. He founded the Loughborough Antennas & Propagation Conference (LAPC), which has run over a decade. He has chaired numerous IEE//IET events and has served on the Steering Committee of the European Conference on Antennas and Propagation, EuCAP. He was the General Chair of EuCAP ‘07. He was elected a Fellow of the Royal Academy of Engineers (FREng) in 2011 and a Fellow of the Institute of Electrical (FIET) and Electronics Engineers (FIEEE) in 2012.