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  系列学术报告会通知(二)  
  IEEE 杰出演讲人 Yahya Rahmat-Samii 教授

题目:Electromagnetic Band Gap (EBG) Structures in Antenna Engineering: From fundamentals to Recent
             Advances (天线工程中的电磁带隙结构:从基础到新近的进展)
时间:2009年9月14日(一)下午15:30-17:00
地点:东南大学(四牌楼校区)李文正楼   6楼  北614会议室
主办:IEEE APMTT-EMC Joint Nanjing Chapter
 东南大学  毫米波国家重点实验室
 江苏省电子学会  天线与微波专业委员会
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内容提要: Periodic structures are abundant in nature, which have fascinated artists and scientists alike. When they interact with electromagnetic waves, exciting phenomena appear and amazing features result. In particular, characteristics such as frequency stop bands, pass bands, and band gaps could be identified. Reviewing the literature, one observes that various terminologies have been used depending on the domain of the applications. These applications are seen in filter designs, gratings, frequency selective surfaces (FSS), photonic crystals and photonic band-gaps (PBG), etc. We classify them under the broad terminology of “Electromagnetic Band Gap (EBG)” structures. EBG structures have provided promising paradigm for novel antenna designs. Due to the complexity of the EBG structures, it is usually difficult to characterize them through purely analytical methods. Instead, full wave simulators that are based on advanced numerical methods have been used in EBG analysis. Dispersion diagram, surface impedance, and reflection phase features are revealed for different EBG structures. These analysis tools have been integrated with modern optimization techniques such as genetic algorithms and particle swarm optimization to synthesis unique EBG structures. The applications of EBG structures in antenna designs have become a thrilling topic for antenna scientists and engineers. This is the central focus of this presentation by initially reviewing the fundamentals and then demonstrating recent advances. Utilizing several representative antenna examples it will be demonstrated that proper utilizations of EBG structures could enhance the performance of low profile antennas; however, considerable care must be exercised to fully appreciate their advantages and disadvantages.
演讲人简历:Yahya Rahmat-Samii is a Distinguished Professor, holder of the Northrop-Grumman Chair in EMs, member of the US National Academy of Eng. He was the former chairman of the EE Department at the UCLA, Before joining UCLA in 1989, he was a Senior Research Scientist at Jet Propulsion Laboratory of Caltech/NASA. Dr. Rahmat-Samii was 1995 President of IEEE AP Society, IEEE Distinguished Lecturer for 1995-1997 & 2007-2009 presenting lectures internationally. He was elected as a Fellow of IEEE in 1985 & a Fellow of IAE in 1986 and served as the Vice President of AMTA a Edmond S. Gillespie Fellow of AMTA (2007). Dr. Rahmat-Samii has authored and co-authored over 800 technical papers for journals and conferences, and has written over 25 book chapters and four books entitled, Electromagnetic Optimization by Genetic Algorithms, Electromagnetic Band Gap Structures in Antenna Engineering, and Impedance Boundary Conditions in Electromagnetics  Implanted Antennas in Medical Wireless Communications. He is also hold several patents. His research contributions cover a diverse area of electromagnetics and antennas. Dr. Rahmat-Samii has received numerous awards, including the 1992 &1995 Wheeler Best Appl. Prize Paper Award for IEEE AP Trans; 1999 Univ. of Illinois ECE Distinguished Alumni Award; AMTA’2000 Distinguished Achiev. Award; & IEEE 3rd Millennium Medal. He was the recipient of an Honorary Doctorate in Physics from the Univ.of Santiago de Compostela, Spain; & elected as a Foreign Member of the Royal Flemish Academy of Belgium for Science and the Arts (2001); he received the Technical Excellence Award from JPL(2002), the URSI Booker Gold Medal (2005), the Chen-To Tai Distinguished Educator Award of IEEE AP-S (2007), & the IEEE AP-S Distinguished Achievement Award (2009). Prof. Rahmat-Samii is the designer of the IEEE AP-S logo which is displayed on all IEEE AP-S publications
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