Abstract: This short course gives the participants an overview of the application, implementation, design and verification of base station antennas for 5G. In particular it is aimed at microwave, RF- and antenna engineers in the wireless area, but also useful for researchers looking for relevant research topics and system engineers needing a deeper understanding of the antenna component of their system.
The course explains underlying theoretical and practical implementation aspects of base station antennas in mobile communication networks of today and in 5G networks but discusses also their design, requirements and verification.
Outline: The course is divided into eight parts:
In the first three parts the fundamental parameters of a base station antenna are discussed in the context of radio network design. In particular we discuss parameters such as gain, radiation patterns, frequency bands and beam forming and put them in the context of cell planning, propagation and capacity.
In the fourth and fifth parts of the course we give an overview of the underlying theory of diversity, MIMO and multi beam antenna systems. In particular we look in detail at the implementation of multiple antennas in the 3GPP standard and how it is supposed to be used in various scenarios of 5G
In the final parts, we discuss the design of advanced antenna systems (AAS), regulatory requirements and their verification. In particularly we discuss “Over the Air” verification methods such as: Far field measurements (incl. CATR), Near field measurements and the use of, Reverberation chambers.
Bio: Prof. Claes Beckman is a microwave and antenna systems engineering professor and the founding director of the research center Wireless@kth, at KTH the Royal Institute of Technology in Stockholm Sweden. He has more than 30 years of experience from both academia and the wireless (radio and radar) industry, where his work has resulted in numerous products, patents and contributions to standards while serving on both ETSI and 3GPP committees. He is the adviser 50+ M.Sc., 7 licentiate and 3 PhD thesis and has published 100+ journal articles and conference reports, He was KTH’s Principal Investigator in the EU FP7 project METIS and has over the years generated more than $20M for various research projects related to wireless networks, radars, antennas and propagation. He is currently a senior researcher in the Radio Systems lab at KTH and a part time technical expert for Icomera AB. He also serves as board member of Medfield Diagnostics AB (publ.) and H&E Solutions AB and a technical board member of InCoax AB and Allgon AB (publ).
Bio: John Sanford is a professor of practice with the University of California San Diego and advises a number of companies in the wireless industry. He also manages the asset portfolio of Smartwaves Investments. Until recently, he was Chief Technical Officer of Ubiquiti Networks where he developed next-generation wireless communications systems. Previously he was president of Optimal RF which was acquired by Cushcraft Corporation and subsequently acquired by Laird Technologies. He was CTO of REMEC, Inc. where he developed the technology roadmap, IP and strategic partnerships and ran REMEC's Fixed Wireless Access Division. Prior to that, he founded Smartwaves International, which was acquired by REMEC in February 1999. At both locations, Dr. Sanford developed RF transceivers and related products including antennas, filters, algorithms and amplifiers. He has been active in the development and use of artificial intelligence routines for the design of microwave products. Prior to that, he was an Associate Professor at Chalmers University of Technology where he taught and conducted research related to Electromagnetics, Antennas and Array Signal Processing (MIMO). Dr. Sanford headed the Mobile Tower Top Group at Huber & Suhner AG. There he invented a range of mobile communications products that have become industry norms. From 1985 to 1988 he was a group manager with the Georgia Tech Research Institute where he designed military phased arrays and communication systems.
Specialties: Dr. Sanford uses advanced artificial intelligence methods to develop products with performance that would be impossible to realize using convention techniques. These products include wind turbines, microwave antennas, transceivers, and related products including, filters, amplifiers, and MIMO signal processing algorithms.
Additionally, he has led or participated in five successful equity events (2 IPOs and 3 acquisitions) for companies where he was either a prime or a senior contributor.
Bio: Dr. Joseph Hucks is a Senior Research Scientist in the Antenna Systems Division of the Sensors and Electromagnetic Applications Laboratory (SEAL) at the Georgia Tech Research Institute (GTRI). His areas of expertise are design, analysis, calibration, performance modeling and simulation in the antenna/radar and EO/IR domains.
At Raytheon/Santa Barbara Remote Sensing, he was the lead analyst and testbed lead for the successful Visible Infrared Imaging Radiometer Suite (VIIRS) pursuit. At Toyon Research Corporation, he performed the initial antenna analyses for the XLSAT study which led to the DARPA ISAT Program. At Harris Corporation, he was the lead antenna analyst on the ISAT program, where he developed the SPARTAN asymptotic physical optics algorithm, enabling for the first time analysis and real-time compensation of deformed phased array-fed reflectors tens of thousands of wavelengths long, for which he won a Harris engineering award and received a certificate of recognition from DARPA. At Harris he also worked on direction finding and various calibration algorithms. At Trident Systems, he worked closely with the late Howard Mendelson on his Model-Aided Adaptive Processing (MAAP) GMTI algorithm. At SAZE Technologies he worked on multistatic radar data fusion, automatic target recognition using complex SAR imagery, and developed a fully-polarimetric clutter model for arbitrary terrain.
Among his distinctions, he graduated Phi Beta Kappa from M.I.T. and is an NSF Fellow. He is also an ex-Green Beret and graduated on the Commandant’s List from the U.S. Army Special Forces Qualification Course, and has real world special operations experience. He is also a Senior Member of IEEE. Joe and his wife Christi were extremely honored when his friend Ben Bova dedicated his book Apes & Angels to them.
He received his S.B. in Mathematics from M.I.T. in 1984, where he also studied Electrical Engineering and Physics, and his M.A. and Ph.D. in Theoretical Physics from U.C.S.B., where he worked on general relativity, gauge field theory and particle physics.
Abstract: Electromagnetic metamaterials are artificial periodic structures engineered to control the propagation of waves and to achieve physical effects not attainable in natural materials – high-frequency magnetism, negative refraction, strong absorption, lensing, cloaking, and more. Research in metamaterials started three decades ago, if not earlier, and exploded in the 2000s as a quest for “perfect lenses,” “perfect absorbers,” etc. But, as the field of metamaterials matured, it became clear that ideal devices were not realizable because of losses, finite lattice cell sizes, and other factors. Undoubtedly, however, “imperfect” materials and devices will continue to be developed, and we can therefore expect a growing need for more sophisticated methods of their analysis and, more specifically, for accurate homogenization theories valid for any composition and size of the lattice cell.
The objective of homogenization (effective medium theory) is to describe a composite structure in terms of effective parameters accurately representing reflection, transmission and propagation of waves on the scale coarser than the lattice cell size.
The course introduces a homogenization methodology valid in both electrostatics and electrodynamics and applicable to an arbitrary size and composition of the lattice cell. Nonlocal effects can be included in the model, making order-of-magnitude accuracy improvements possible. We then travel backward in time and explore the connection between the new framework and the classical 19th – early 20th century theories of Clausius-Mossotti, Lorenz-Lorentz, Maxwell Garnett.
A particularly challenging problem for future research is to determine what effective material tensors are attainable for given constituents of a metamaterial with their given properties, and how the lattice cell could be designed to produce such tensors. For example, what is the maximum effective permeability achievable? Bounds for effective parameters are currently known only for relatively simple settings, such as static dielectric permittivity of mixtures with two ingredients. The methodology developed in this course may help to make progress toward solving a much broader set of problems of this kind. This methodology can also be extended to other areas – for example, acoustics or eddy current problems in laminated cores of electric machines.
Bio: Dr. Igor Tsukerman is Professor of Electrical and Computer Engineering at the University of Akron, Ohio, where he has been a faculty member since 1995. Dr. Tsukerman’s academic degrees are from St. Petersburg Polytechnic in Russia: a combined B.Sc. / M.Sc. degree (with honors) in Control Systems (1982) and a Ph.D. in Electrical Engineering (1988). His research is focused on the simulation of nanoscale systems, applied electromagnetics and photonics, plasmonics, computational methods, and homogenization of materials. He teaches a variety of undergraduate and graduate courses (Basic Electrical Engineering, Signals & Systems, Circuits, Electromagnetic Fields, Digital Signal Processing, Random Signal Analysis, Simulation of Nanoscale Systems, and others). Tsukerman has approximately 200 refereed publications, has authored a monograph (Computational Methods for Nanoscale Applications: Particles, Plasmons and Waves, Springer 2008) and co-edited a book (Plasmonics and Plasmonic Metamaterials: Analysis and Applications, World Scientific, 2011).
Before coming to the University of Akron, Tsukerman worked at the Department of Electrical & Computer Engineering, the University of Toronto (1990-1995). A joint project with GE Canada involved electromagnetic field analysis and noise reduction in large electric motors.
Abstract: The main disadvantage with forming a beam in a specific direction using an array antenna is that it requires multiple radiation elements, phase shifters, and signal processing circuits. The size, weight, and cost of such an antenna prohibit its use in modern portable transceivers. This short course describes how to overcome such issues, presenting recent progress in beamforming antennas. The course is composed of three chapters.
Chapter 1 describes beam-forming antennas that are fabricated using conventional natural materials. Each antenna is composed of a main radiation element and parasitic elements. A detailed discussion of beam forming in 2, 4, and 16 directions is presented. The presentation reveals the reconfigurablity of the antenna characteristics, and includes the radiation pattern, input impedance, and gain, when the beam is steered around the antenna axis. Note that the radiation from these antennas is linearly polarized (LP).
Chapter 2 introduces circularly polarized (CP) beam-forming metamaterial antennas that can steer their beam in both the azimuth and elevation planes. The antenna height is chosen to be extremely small: on the order of lambda/100 at the operating frequency. This makes these antennas suitable for installation on the surface of moving objects, such as vehicles and satellites.
Chapter 3 presents high-gain antennas with a beam that can be tilted in specific directions. It is emphasized that these antennas do not use phase shifters; each antenna is composed of a single radiation source and N (= 1, 2, 3) inhomogeneous loop-based metaplates, which are placed above the radiation source. The mechanism for forming a tilted beam is explained and radiation beams with a tilt angle of 30 and 60 degrees from the zenith are demonstrated.
Bio: Hisamatsu Nakano (IEEE Life Fellow) is a Professor Emeritus at Hosei University and a special-appointment researcher at Hosei university graduate school. His research topics include numerical methods for low- and high-frequency antennas and optical waveguides. He has published over 300 articles in major refereed journals and is the author or co-author of 12 books, including Low-Profile Natural and Metamaterial Antennas, IEEE Press and Wiley, 2016.
In 1994, he received the IEEE Transactions on Antennas and Propagation Best Application Paper Award (H. A. Wheeler Award). He also received “Chen-To Tai Distinguished Educator Award” in 2006 and “Distinguished Achievement Award” in 2016, both from the IEEE Antennas and Propagation Society. In 2010, he was selected as a recipient of “The Prize for Science and Technology from Japan’s Minister of Education, Culture, Sports, Science, and Technology.”
Prof. Nakano has served as a member of AdCom (2000-2002) and the Region 10 representative (2004-2010) of the IEEE Antennas and Propagation Society. He is an associate editor of several journals and magazines, such as Electromagnetics, IEEE Antennas and Propagation Society Magazine, etc.
Abstract: In recent years, research in deep learning techniques has attracted much attention. With the help of big data technology, massive parallel computing, and fast optimization algorithms, deep learning has greatly improved the performance of many problems in the speech and image research. In this short tutorial, the presenter hopes to share some of his learnings in deep learning techniques, and discuss the potential and feasibility of applying deep learning in computational electromagnetics. The presenter hopes to explore the characteristics, feasibility, and challenges of deep learning methods in the field of computational electromagnetics through some preliminary research on solving Poisson's equation, array antenna synthesis, electromagnetic imaging, etc.
Bio: Prof. Maokun Li received the B.S. degree in electronic engineering from Tsinghua University, Beijing, China, in 2002, and the M.S. and Ph.D. degrees in electrical engineering from University of Illinois at Urbana-Champaign in 2004 and 2007, respectively. After graduation, he worked as a senior research scientist at Schlumberger-Doll Research, Cambridge, MA, USA. Since 2014, he joined the department of electronic engineering as an associate professor in Tsinghua University, Beijing, China. His research interests include fast algorithms in computational electromagnetics and their applications in antenna modeling, electromagnetic compatibility analysis, inverse problems, etc. He has published 1 book chapter, 50 journal papers, 120 conference proceedings, and 3 patent applications. He also serves as an associate editor for IEEE Journal on Multiscale and Multiphysics Computational Techniques, Applied Computational Electromagnetic Society Journal, and the guest editor for the special issue on “Electromagnetic Inverse Problems for Sensing and Imaging” in IEEE Antennas and Propagation Magazine. He was also among the recipients of China National 1000 Plan in 2014, and 2017 IEEE Ulrich L. Rohde Innovative Conference Paper Award.
Abstract: The proliferation of wireless market has driven the demand of smart RF systems with multi-functional sensing, energy harvesting and communication modules that can readily reconfigure their electromagnetic response depending on changes in their environment. This requires low-cost, compact, flexible and reconfigurable RF components that can be printed on-demand and scaled-to-large numbers. However, current systems are inadequate to meet these demands which can be largely attributed towards use of - 1) subtractive manufacturing technologies (SMTs) and 2) conventional tunability schemes that become non-linear and complicated as structure size increases.
Traditional SMTs are complicated, require specialized clean room environment and can only realize planar RF modules with high fabrication cost & time and moderate achievable performance. Moreover, their planar configuration can only support finite tunability mechanisms that can be broadly categorized into changing material properties, using complex electronics or micro-electromechanical (MEMS) structures. These techniques are typically power hungry, laborious, expensive with limited (discrete-state) tunability range making them impractical as the size of the structure increases. In comparison, mechanical tuning mechanisms features superior power handling capability, quality factor, linearity and wide-band (continuous range) tunability but their bulky size, heavy weight and low switching/tuning speed has restricted their use in modern communication systems.
The hidden link between the two approaches are smart 4D origami-inspired RF structures; that are designed to mimic nature's wisdom of self-assemblage and shape-reconfiguration in a well-studied and controlled manner to achieve tunability through shape-morphing.
Mr. Syed Abdullah Nauroze received his B.Sc. (honors) in computer engineering from University of Engineering and Technology, Taxila Pakistan in 2005 and M.Sc. in electrical engineering from Royal Institute of Technology (KTH), Stockholm, Sweden and Georgia Institute of Technology in 2008 & 2018 respectively. During 2008-09 he worked at Microsystems Technology Laboratory (KTH), where he conducted research on on-chip millimeter-wave antennas for automotive radar and future wireless applications. He is currently pursuing his Ph.D. in electrical and computer engineering at Georgia Institute of Technology, Atlanta, USA where he is working as a Research Assistant at ATHENA lab. Mr. Nauroze has a teaching experience of seven (7) years. His research interests include application of additive manufacturing techniques like 3D printing and ink-jet printing for flexible and origami-based RF structures. He has published his work in more than 30 journals and conference proceedings including Proceedings of National Academy of Sciences (PNAS), IEEE Proceedings and International Microwave Symposium (IMS). He is also a recipient of prestigious Swedish Institute scholarship in 2006 and Fulbright Scholarship in 2014 for his masters and PhD degrees respectively.
Prof. Manos Tentzeris was born and grew up in Piraeus, Greece. He graduated from Ionidios Model School of Piraeus in 1987 and he received the Diploma degree in Electrical Engineering and Computer Science (Magna Cum Laude) from the National Technical University in Athens, Greece, in 1992 and the M.S. and Ph.D. degrees in Electrical Engineering and Computer Science from the University of Michigan, Ann Arbor in 1993 and 1998.
He is currently a Ken Byers Professor in the area of flexible electronics with the School of ECE, Georgia Tech and he has published more than 600 papers in refereed Journals and Conference Proceedings, 5 books and 25 book chapters. He has served as the Head of the Electromagnetics Technical Interest Group of the School of ECE, Georgia Tech. Also, he has served as the Georgia Electronic Design Center Associate Director for RFID/Sensors research from 2006-2010 and as the GT-Packaging Research Center (NSF-ERC) Associate Director for RF research and the leader of the RF/Wireless Packaging Alliance from 2003-2006. Also, Dr. Tentzeris is the Head of the A.T.H.E.N.A. Research Group (20 students and researchers) and has established academic programs in 3D Printed RF electronics and modules, flexible electronics, origami and morphing electromagnetics, Highly Integrated/Multilayer Packaging for RF and Wireless Applications using ceramic and organic flexible materials, paper-based RFIDs and sensors, inkjet-printed electronics, nanostructures for RF, wireless sensors, power scavenging and wireless power transfer, Microwave MEM's, SOP-integrated (UWB, mutliband, conformal) antennas and Adaptive Numerical Electromagnetics (FDTD, MultiResolution Algorithms). He was the 1999 Technical Program Co-Chair of the 54th ARFTG Conference and he is currently a member of the technical program committees of IEEE-IMS, IEEE-AP and IEEE-ECTC Symposia. He was the TPC Chair for the IMS 2008 Conference and the Co-Chair of the ACES 2009 Symposium. He was the Chairman for the 2005 IEEE CEM-TD Workshop. He was the Chair of IEEE-CPMT TC16 (RF Subcommittee) and he was the Chair of IEEE MTT/AP Atlanta Sections for 2003. He is a Fellow of IEEE, a member of MTT-15 Committee, an Associate Member of European Microwave Association (EuMA), a Fellow of the Electromagnetics Academy, and a member of Commission D, URSI and of the the Technical Chamber of Greece. He is the Founder and Chair of the newly formed IEEE MTT-S TC-24 (RFID Technologies). He is one of the IEEE C-RFID DIstinguished Lecturers and he has served as one IEEE MTT-Distinguished Microwave Lecturers (DML) from 2010-2012.
Prof. Glaucio Paulino is the Raymond Allen Jones Chair at the Georgia Institute of Technology. Prior to joining Georgia Tech in January 2015, he was the Donald and Elizabeth Willett Professor of Engineering at the University of Illinois at Urbana-Champaign (UIUC). His seminal contributions in the area of computational mechanics include the development of methodologies to characterize the deformation and fracture behavior of existing and emerging materials and structural systems; topology optimization for large-scale multiscale/multiphysics problems; deployable structures and origami engineering. According to a Daily Digest article, he created “Tech’s first Origami Engineering class” (arguably the first in the USA) during the Fall/2017 and received the “Class of 1940 Course Survey Teaching Effectiveness Award”. He earned the Walter L. Huber Civil Engineering Research Prize from ASCE (2004) and he is a Fellow of USACM (2011), IACM (2012), AAM (2015), and ASCE/EMI (2017). He received the 2014 Ted Belytschko Applied Mechanics Award from ASME; and the 2015 Cozzarelli Prize from the National Academy of Sciences, “which recognizes recently published PNAS papers of outstanding scientific excellence and originality.” He was the Shimizu Professor at Stanford Univ. in 2016 and the 2017 Southwest Mechanics Lecture Series Speaker. He was President of the Society of Eng. Science (SES) in 2018, and a member of the Board of Directors of EMI (Engineering Mechanics Institute), 2015-2018. He is Associate Editor of the Journal of Optimization Theory & Applications, ASCE J. of Eng. Mechanics, and Mechanics Research Communications, and a Regional editor of the International Journal of Fracture. His contributions to the permanent scientific literature include more than 250 scholarly publications in peer-refereed international journals, including interdisciplinary journals (such as PNAS, Science Advances, Scientific Reports, Soft Matter, and Proceedings of the Royal Society-A), and a book on The Symmetric Galerkin Boundary Element Method (Springer-Verlag, 2008). His h-index is 49 (ISI Web of Science), 66 (Google Scholar). More information about his research and professional activities can be found at the following url: http://www.ghpaulino.com
Prof. H. Jerry Qi is an associate professor at Georgia Institute of Technology. He received his bachelor degrees (dual degree), master and PhD degree from Tsinghua University (Beijing, China) and a ScD degree from Massachusetts Institute of Technology (Boston, MA, USA). After one year postdoc at MIT, he joined University of Colorado Boulder as an assistant professor in 2004, and was promoted to associate professor with tenure in 2010. He joined Georgia Tech in 2014 as an associate professor with tenure. Prof. Qi’s research is in the broad field of nonlinear mechanics of soft materials and focuses on developing fundamental understanding of multi-field properties of soft active materials through experimentation and constitutive modeling then applying these understandings to application designs. He and his collaborators have been working on a range of soft active materials, including shape memory polymers, shape memory elastomeric composites, light activated polymers, covalent adaptable network polymers, for their interesting behaviors such as shape memory, light actuation, surface patterning, surface welding, healing, and reprocessing. Recently, he and his collaborators pioneered the 4D printing concept. Prof. Qi is a recipient of NSF CAREER award (2007). He is the founding chair of Mechanics of Soft Materials technical committee of Applied Mechanics division in ASME. He is a member of Board of Directors and the treasurer for the Society of Engineering Science.
Prof. Stavros V. Georgakopoulos (S’93–M’02–SM’11) received the Diploma in electrical engineering from the University of Patras, Patras, Greece, in June 1996, M.S. degree in electrical engineering, and the Ph. D. degree in electrical engineering both from Arizona State University (ASU), Tempe, in 1998, and 2001, respectively. From 2001-2007 he held a position as Principal Engineer at the Research and Development Department of SV Microwave, Inc., where he worked on the design of high reliability passive microwave components, thin-film circuits, high performance interconnects and calibration standards. Since 2007, he has been with the Department of Electrical and Computer Engineering, Florida International University, Miami, where he is now Professor. Also, he is the founder and Director of the Transforming Antennas Center at FIU, a research center focusing on the development of foldable and reconfigurable antenna systems. He has pioneered the development of origami antennas and origami electromagnetic structures and is the inventor of the foundational patent on origami antennas (Georgakopoulos, et al., Origami Folded Antennas, USPTO Utility Patent US 9,214,722). He leads funded research programs on antennas, RF systems, wireless power transfer and wireless technologies. He also serves as Associate Editor of the IEEE Transactions on Antennas and Propagation. In 2015, he received the 2015 FIU President’s Council Worlds Ahead Faculty Award, which is the highest honor FIU extends to a faculty member for excelling in research, teaching, mentorship and service.
Prof. Sungjoon Lim (M’06) received the B.S. degree in Electronic Engineering from Yonsei University, Seoul, Korea, in 2002, and the M.S. and Ph.D. degrees in Electrical Engineering from the University of California at Los Angeles (UCLA), Los Angeles, CA, USA, in 2004 and 2006, respectively.
After a postdoctoral position at the Integrated Nanosystem Research Facility (INRF), University of California at Irvine, Irvine, CA, USA, he joined the School of Electrical and Electronics Engineering, Chung-Ang University, Seoul, Korea, in 2007, where he is currently a full Professor. From 2013 to 2014 and 2018 to 2019, he was a Visiting Scholar at the Georgia Institute of Technology, Atlanta, GA, USA. He has authored and coauthored more than 250 international conference, letter and journal papers. His research interests include engineered electromagnetic structures (metamaterials, electromagnetic bandgap materials, and frequency selective surfaces), origami RF electronics, reconfigurable antennas, substrate integrated waveguide (SIW) components, inkjet-printed RF electronics and RF MEMS applications. He is also interested in the modeling and design of microwave circuits and systems.
Prof. Lim received the Institution of Engineering and Technology (IET) Premium Award in 2009, ETRI journal Best Paper Award in 2014, Best Paper Award in the 2015 International Workshop on Antenna Technology (iWAT), Best Paper Award in the 2018 International Symposium on Antennas and Propagation (ISAP), and CAU Distinguished Scholar from 2014 to 2018.
Abstract: Due to the development of wireless communication technology, low profile, high gain, multiband, or wideband antennas are desired. This short course presents an unbalanced fed ultra low profile inverted L (ULPIL) antenna and the functional antennas composed of ULPIL antenna. At first, the principle of impedance matching is discussed by comparing with that in the inverted F antenna. Then the design of following functional antennas are presented.
Bios: Emeritus Professor Mitsuo Taguchi received his B. E. and M. E. degrees from Saga University, Japan in 1975 and 1977, respectively, and a Dr. Eng. Degree from Kyushu University Japan in 1986. In 1996 he was a visiting researcher at the Department of Electrical Engineering at the University of California, Los Angeles. From 1977 he was a Research Associate in Saga University. From 1987 he was an Associate Professor in Nagasaki University. From 2007 he was a Professor in Nagasaki University. He from retired Nagasaki University in 2018. Since 2018 he has been a Professor Emeritus in Nagasaki University. Prof. Taguchi’s research interests are low profile antennas for mobile communication and the education by using the electromagnetic simulator. He was a Chair of Technical group of Microwave Simulator in IEICE from 2006 to 2007, IEEE AP-S Fukuoka Chapter Chair from 2007 to 2008, IEICE Kyushu Section Chair in 2013. Prof. Taguchi wrote the following books; Portable TV Antenna, in “Antenna Engineering Handbook Fourth Edition”, Chapter 30, edited by J. Volakis, McGraw Hill, 2007, and so on.
Abstract: From frequency selective surfaces (FSS) to electromagnetic band-gap (EBG) ground planes, from impedance boundaries to Huygens metasurfaces, novel electromagnetic surfaces have been emerging in both microwaves and optics. Many intriguing phenomena occur on these surfaces, and novel devices and applications have been proposed accordingly, which have created an exciting paradigm in electromagnetics, the so-called "Surface Electromagnetics". This short course will review the development of various electromagnetic surfaces, as well as the state-of-the art concepts and designs. Detailed presentations will be provided on the unique electromagnetic features of EBG ground planes and advanced metasurfaces. Furthermore, a wealth of antenna examples will be presented to illustrate promising applications of the surface electromagnetics in antenna engineering.>
Yahya Rahmat-Samii is a Distinguished Professor, holder of the Northrop-Grumman Chair in electromagnetics, member of the US National Academy of Engineering (NAE), winner of the 2011 IEEE Electromagnetics Field Award and the former chairman of the Electrical Engineering Department at the University of California, Los Angeles (UCLA). Before joining UCLA, he was a Senior Research Scientist at Caltech/NASA's Jet Propulsion Laboratory. Prof. Rahmat-Samii was the 1995 President of the IEEE Antennas and Propagation Society and 2009-2011 President of the United States National Committee (USNC) of the International Union of Radio Science (URSI). He has also served as an IEEE Distinguished Lecturer presenting lectures internationally.
Prof. Rahmat-Samii is a Fellow of IEEE, AMTA, ACES, EMS and URSI. He has authored or co-authored over 1000 technical journal articles and conference papers and has written over 35 book chapters and five books. He has over fifteen cover-page IEEE publication papers. In 1984, he received the Henry Booker Award from URSI, which is given triennially to the most outstanding young radio scientist in North America. In 1992 and 1995, he received the Best Application Paper Prize Award (Wheeler Award) of the IEEE Transactions on Antennas and Propagation. In 1999, he received the University of Illinois ECE Distinguished Alumni Award. In 2000, Prof. Rahmat-Samii received the IEEE Third Millennium Medal and the AMTA Distinguished Achievement Award. In 2001, he received an Honorary Doctorate Causa from the University of Santiago de Compostela, Spain. In 2001, he became a Foreign Member of the Royal Flemish Academy of Belgium for Science and the Arts. In 2002, he received the Technical Excellence Award from JPL. He received the 2005 URSI Booker Gold Medal presented at the URSI General Assembly. He is the recipient of the 2007 Chen-To Tai Distinguished Educator Award and the 2009 Distinguished Achievement Award of the IEEE Antennas and Propagation Society. He is the recipient of the 2010 UCLA School of Engineering Lockheed Martin Excellence in Teaching Award and the 2011 campus-wide UCLA Distinguished Teaching Award. In 2015, he received the Distinguished Engineering Educator Award from The Engineer's Council. In 2016, he received the John Kraus Antenna Award of the IEEE Antennas and Propagation Society and the NASA Group Achievement Award. In 2017, he received the ACES Computational Electromagnetics Award and IEEE Antennas and Propagation S. A. Schelkunoff Best Transactions Prize Paper Award.
Prof. Rahmat-Samii has had pioneering research contributions in diverse areas of electromagnetics, antennas, measurement and diagnostics techniques, numerical and asymptotic methods, satellite and personal communications, human/antenna interactions, RFID and implanted antennas in medical applications, frequency selective surfaces, electromagnetic band-gap structures, applications of the genetic algorithms and particle swarm optimizations, etc., His original antenna designs are on many NASA/JPL spacecrafts for planetary, remote sensing and Cubesat missions (visit http://www.antlab.ee.ucla.edu/). Prof. Rahmat-Samii is the designer of the IEEE AP-S logo which is displayed on all IEEE AP-S publications.
Dr. Fan Yang received the B.S. and M.S. degrees from Tsinghua University, Beijing, China, and the Ph.D. degree from the University of California at Los Angeles (UCLA). From 1994 to 1999, he was a Research Assistant with the State Key Laboratory of Microwave and Digital Communications, Tsinghua University. From 1999 to 2002, he was a Graduate Student Researcher with the Antenna Laboratory, UCLA. From 2002 to 2004, he was a Post-Doctoral Research Engineer and Instructor with the Electrical Engineering Department, UCLA. In 2004, he joined the Electrical Engineering Department, The University of Mississippi as an Assistant Professor, and was promoted to an Associate Professor. In 2011, he joined the Electronic Engineering Department, Tsinghua University as a Professor, and has served as the Director of the Microwave and Antenna Institute since then.
Dr. Yang's research interests include antennas, periodic structures, computational electromagnetics, and applied electromagnetic systems. He has published over 200 journal articles and conference papers, six book chapters, and three books entitled Scattering Analysis of Periodic Structures Using Finite-Difference Time-Domain Method (Morgan & Claypool, 2012), Electromagnetic Band Gap Structures in Antenna Engineering (Cambridge Univ. Press, 2009), and Electromagnetics and Antenna Optimization Using Taguchi's Method (Morgan & Claypool, 2007).
Dr. Yang served as an Associate Editor of the IEEE Transactions on Antennas and Propagation (2010-2013) and an Associate Editor-in-Chief of Applied Computational Electromagnetics Society (ACES) Journal (2008-2014). He was the Technical Program Committee (TPC) Chair of 2014 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting. Dr. Yang has been the recipient of several prestigious awards and recognitions, including the Young Scientist Award of the 2005 URSI General Assembly and of the 2007 International Symposium on Electromagnetic Theory, the 2008 Junior Faculty Research Award of the University of Mississippi, the 2009 inaugural IEEE Donald G. Dudley Jr. Undergraduate Teaching Award, and the 2011 Recipient of Global Experts Program of China.
Abstract: In the classical Electromagnetics textbooks, the microwave devices such as circulators, couplers, and filters are solved by non-systematic approaches such as even-odd mode analysis. Hence an electrical engineering student coming from the conventional circuit theory background encounters difficulties in understanding and solving microwave circuits. In this paper, we propose a modified node voltage analysis method in which the circuit branches are represented by their forward transmission matrices so that the electromagnetic wave propagation is taken care of. The Kirchhoff's current rule, tailored for high frequencies, is applied to formulate the simultaneous node voltage equations which are subsequently solved by matrix inversion. Voltages and currents and the resulting S-parameters can then be calculated. From the node currents, a 2D voltage or current surface distribution can also be generated that can reveal the underlying propagation mechanisms for different microwave (non-radiating) circuits. Examples include filters, couplers, duplexers, and other novel designs.
In this workshop, I will present a systemic approach of solving voltages and currents for selected circuit designs from recently published papers. I will provide MATLAB codes for these circuits which can be further modified to be used in any other circuit design.
In the examples that I will provide from my own papers, the FTM method results strengthened the paper presentation and hence contributed to their acceptance in renowned journals such as IEEE Transactions on Microwave theory and techniques, Applied Physics Letters, and IEEE Access.
Bio: Prof. Omar F. Siddiqui received the bachelor’s degree from the University of Engineering and Technology at Lahore, Lahore, Pakistan, in 1994, the master’s degree from the University of Texas at Arlington, Arlington, TX, USA, in 1999, and the Ph.D. degree from the University of Toronto, Toronto, ON, Canada, in 2006, all in electrical engineering. He was with Nortel Networks and Alcatel-Lucent as a Radio Frequency Design Engineer. He is currently an Associate Professor with the College of Engineering, Taibah University, Medina, Saudi Arabia. His current research interests include applied electromagnetics and metamaterials. He was a recipient of the two Best Paper Awards from the International Microwave Symposium, Long Beach, in 2005.