Keynote Speech 1
The Art and Engineering of Antenna Near-Field Measurements and Diagnostics: History, Fundamentals and Future
Speaker: Prof. Yahya Rahmat-Samii (University of California, Los Angeles, USA)
Date:December 4, 11:20 – 12:00
This talk will provide the participants with a novel way to understand the fundamental concepts behind modern antenna measurements and, in particular, the near field measurements and diagnostic techniques. Starting from Marconi’s first antenna pattern measurements, we then suggest planar near-field measurements as an exciting paradigm linking electromagnetic theory, sampling techniques, and FFT. Starting from the basic electromagnetic principles, the underlying concepts governing simulations, designs and operations of planar near field measurements and diagnostics techniques will be reviewed. Modern measurement schemes such as plane-polar and bi-polar scanning will be highlighted. Advances in applying these techniques to millimeter-wave measurements will be reviewed. Representative measurement results of reflector, array and reflectarray antennas will be presented. The importance of near field diagnostic techniques will be discussed through some unique test cases. Finally, the topic of phaseless measurement techniques and algorithms will be touched upon demonstrating the potential applications of these techniques in modern antenna measurements. Among the examples that will be touched upon are the measurements of Galileo mesh reflector antenna, weather array, Rapidscat antenna aboard the space shuttle, etc. It is the intent of this talk to expose the participants to the fun world of antenna metrology, where they can appreciate how a number of related fields are integrated in this endeavor.
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. Dr. 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.
Dr. Rahmat-Samii is a Fellow of IEEE, AMTA, ACES, EMS and URSI. Dr. Rahmat-Samii 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, Rahmat-Samii 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.
Keynote Speech 2
Planar Near Field to Far Field Transformation Using an Equivalent Current Approach that Employs No Probe Correction
Speaker: Prof. Tapan Sarkar, (Syracuse University, USA)
Date:December 5, 09:00 – 09:40
This paper applies the equivalent magnetic current approach to obtain the equivalent currents on a fictitious surface representing the radiated fields. A simple, efficient and accurate method is presented for computing far-field antenna patterns from measured near-field data where a planar phased array consisting of resonant size printed dipole is used as a probe antenna. The method utilizes near-field data to determine equivalent magnetic current sources over a fictitious planar surface and these currents are used to ascertain the far-fields. The near-field measurements are carried out by terminating the dipole with an appropriate load impedance and then measuring the complex voltages across the loads. In this case, probe corrections were not implemented.
Tapan K. Sarkar received the B.Tech. degree from the Indian Institute of Technology, Kharagpur, in 1969, the M.Sc.E. degree from the University of New Brunswick, Fredericton, NB, Canada, in 1971, and the M.S. and Ph.D. degrees from SyracuseUniversity, Syracuse, NY, in 1975. From 1975 to 1976, he was with the TACODivision of the General Instruments Corporation. He was with the Rochester Institute of Technology, Rochester, NY, from 1976 to 1985. He was a Research Fellow at the Gordon McKay Laboratory, Harvard University, Cambridge, MA, from1977 to 1978. He is now a Professor in the Department of Electrical andComputer Engineering, Syracuse University. His current research interests deal with numerical solutions of operator equations arising in electromagnetics and signal processing with application to system design. He obtained one of the“best solution” awards in May 1977 at the Rome Air Development Center (RADC)Spectral Estimation Workshop. He received the Best Paper Award of the IEEETransactions on Electromagnetic Compatibility in 1979 and in the 1997 NationalRadar Conference. He has authored or coauthored more than 360 journal articles and numerous conference papers and 32 chapters in books and fifteen books,including his most recent ones, Iterative and Self Adaptive Finite-Elements in Electromagnetic Modeling (Boston, MA: Artech House, 1998), Wavelet Applications in Electromagnetics and Signal Processing (Boston, MA: ArtechHouse, 2002), Smart Antennas (IEEE Press and John Wiley & Sons,2003), History of Wireless (IEEE Press and John Wiley & Sons, 2005), and Physics of Multiantenna Systems and Broadband Adaptive Processing (John Wiley &Sons, 2007), Parallel Solution of Integral Equation-Based EM Problems in the Frequency Domain (IEEE Press and John Wiley & Sons, 2009), Time and Frequency Domain Solutions of EM Problems using Integral Equations and a Hybrid Methodology (IEEE Press and John Wiley & Sons, 2010), and Higher Order Basis Based Integral equation Solver (HOBBIES) (John Wiley & Sons 2012) .
Dr.Sarkar is a Registered Professional Engineer in the State of New York. He received the College of Engineering Research Award in 1996 and the Chancellor’sCitation for Excellence in Research in 1998 at Syracuse University. He was an Associate Editor for feature articles of the IEEE Antennas and Propagation Society Newsletter (1986-1988), Associate Editor for the IEEE Transactions on Electromagnetic Compatibility (1986-1989), Chairman of the Inter-commissionWorking Group of International URSI on Time Domain Metrology (1990-1996),distinguished lecturer for the Antennas and Propagation Society from (2000-2003,2011-2013),Member of Antennas and Propagation Society ADCOM (2004-2007), on the board of directors of ACES (2000-2006), vice president of the Applied ComputationalElectromagnetics Society (ACES), a member of the IEEE Electromagnetics Awardboard (2004-2007), an associate editor for the IEEE Transactions on Antennas and Propagation (2004-2010) and on the editorial board of Digital Signal Processing. A Review-Journal (2003-2012). He is on the editorial board of Journal of Electromagnetic Waves andApplications and Microwave and Optical Technology Letters. He is a member of the InternationalConference Technical Committee of IEEE Microwave Theory and Techniques Society# 1 on Field Theory and Guided Waves. He is a member of Sigma Xind International Union of Radio Science Commissions A and B. He was the 2014 President of the IEEE Antennas and Propagation Society.
He received Docteur Honoris Causa from Universite Blaise Pascal, Clermont Ferrand, France in 1998, from Politechnic University of Madrid, Madrid, Spain in 2004, and from Aalto University, Helsinki, Finland in 2012. He received the medal of the friend of the city of Clermont Ferrand, France, in 2000.
Keynote Speech 3
Rectangular Coordinate Orthogonal Multiplexing Antenna System for Non-Far Region Communication
Speaker: Prof. Jiro Hirokawa (Tokyo Institute of Technology, Japan)
Date:December 6, 09:00 – 09:40
This speech presents the rectangular coordinate orthogonal multiplexing (ROM) antenna system for non-far region communication. ROM uses beam orthogonality in the rectangular coordinate system. The orthogonality based on polarity relating to the symmetry of the antenna structure gives wideband operation and the extension to two-dimensional orthogonality is easy. These features would be advantageous in comparison with OAM transmission based on the orthogonality in the cylindrical coordinate system in microwave and millimeter-wave areas. The feasibility is discussed on one system, where a corporate-feed waveguide slot array antenna and a monopulse circuit are combined. 4-multiplexing 40cm-communication using 16×16-slot arrays are confirmed experimentally in 80GHz band.
Jiro Hirokawa received the B.S., M.S. and D.E. degrees in electrical and electronic engineering from Tokyo Institute of Technology (Tokyo Tech), Tokyo, Japan in 1988, 1990 and 1994, respectively. He was a Research Associate from 1990 to 1996 and an Associate Professor from 1996 to 2015 at Tokyo Tech. He is currently a Professor there.
He was with the antenna group of Chalmers University of Technology, Gothenburg, Sweden, as a Postdoctoral Fellow from 1994 to 1995. His research area has been in slotted waveguide array antennas and millimeter-wave antennas. He received IEEE AP-S Tokyo Chapter Young Engineer Award in 1991, Young Engineer Award from IEICE in 1996, Tokyo Tech Award for Challenging Research in 2003, Young Scientists’ Prize from the Minister of Education, Cultures, Sports, Science and Technology in Japan in 2005, Best Paper Award in 2007 and a Best Letter Award in 2009 from IEICE Communications Society, and IEICE Best Paper Award in 2016. He is a Fellow of IEEE and IEICE.