tapan junici mohamed
Tapan K SARKAR  Jun-Ichi TAKADA  Mohamed HIMDI
Department of Electrical Engineering and Computer Science Syracuse University; Syracuse, New York 13244-1240 Email:,  Department of International Development Engineering
Graduate School of Science and Engineering
Tokyo Institute of Technology 2-12-1-S6-4
O-okayama, Meguro-ku
Tokyo 152-8550, JAPAN
ESIR – 263, avenue Général Leclerc –
Bâtiment 41bis – 35042
Rennes/Universitee De Rennes
Title :The Physics and Mathematics of Cellular Wireless Propagation

Abstract: The objective of this presentation is to illustrate that an electromagnetic macro modeling can properly predict the path loss exponent in a mobile cellular wireless communication. This represents the variation of the path loss with distance from the base station antenna. Specifically, we illustrate that the path loss exponent in a cellular wireless communication is three preceded by a slow fading region and followed by the fringe region where the path loss exponent is four. The size of these regions is determined on the heights of the base station transmitting antennas and the receiving antennas. Theoretically this is illustrated through the analysis of radiation from a vertical electric dipole situated over a horizontal imperfect ground plane as first considered by Sommerfeld in 1909. To start with, the exact analysis of radiation from the dipole is made using the Sommerfeld formulation. The semi-infinite integrals encountered in this formulation are evaluated using a modified saddle point method for field points moderate to far distances away from the source point to predict the appropriate path loss exponents. In addition, Okumura’s experimental data and extensive data taken from seven different base stations in urban environments at two different frequencies will validate the theory. Experimental data reveal that a macro modeling of the environment using an appropriate electromagnetic analysis can accurately predict the path loss exponent for the propagation of radio waves in a cellular wireless communication scenario. It is also shown that an electromagnetic macro modeling of the environment can provide simulation results comparable to the data as one would obtain in an actual drive test measurement for a cellular environment. The input parameters for the electromagnetic model can be generated using only the physical parameters of the environment like the height of the transmitting and receiving antennas over the ground, their tilts toward the ground, and the electrical parameters of the ground. Such analysis can provide realistic plots for the received power versus separation distance between the receiving and the transmitting base station antennas. The novelty of the electromagnetic analysis technique proposed in this paper lies in its ability to match the simulation and measurement results without any statistical or empirical curve fitting or an adhoc choice of a reference distance. This illustration is made using real data measured for cellular networks in western India and Srilanka

Title: Study of Microwave Wideband Channel toward 5G Mobile System

Abstract: Since 4G mobile systems are being released in the real world, R&D trend proceeds to 5G systems. This study focuses on the utilization of microwave frequency above 6 GHz for mobile access. The propagation channel at this frequency range behaves very differently from the conventional UHF channel. The talk covers the background, the development of equipments so called channel sounder, and some experimental results of urban and indoor environments.

Title of Keynote: Creation of a gradient index structure inside foam material for an Inhomogeneous lenses with focusing and beam scanning capabilities in millimeter waves

Abstract: The presentation deals with inhomogeneous dielectric lenses which allow to focus energy from one primary source (antenna). The index law inside the lenses give the opportunity to design beam scanning and beam shaping antennas. Creating a gradient index into a dielectric structure is a major issue nowadays for the design of microwave components and antennas, especially for lenses as Luneburg, Fresnel and Maxwell Fish-eye. The use of a foam material and a simple technological process can allow this. Because a foam material is composed of air bubbles, and core materials (resin, PVC, …), removing the air will increase the density of the foam and so increase its dielectric constant. The authors present a simple technological process to expel the air from a piece of foam in order to increase the permittivity of the foam. This is then applied to the design of a various kind of lens antenna in millimeter waves. The authors worked on this type antenna for millimetre wave applications such indoor communication systems at 60GHz of automotive radars at 24 and 79GHz. The presentation will be divided in sub parts as :
• How to reconstruct the index law inside the lens?
• Which type of primary source to illuminate the lenses?
• Beam scanning and beam shaping capability
• Example of 60GHz active lens antenna

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 Syracuse University, Syracuse, NY, in 1975. From 1975 to 1976, he was with the TACO Division 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, from 1977 to 1978. He is now a Professor in the Department of Electrical and Computer 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 IEEE Transactions on Electromagnetic Compatibility in 1979 and in the 1997 National Radar Conference. He has authored or coauthored more than 300 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: Artech House, 2002), Smart Antennas (IEEE Press and John Wiley & Sons, 2003), History of Wireless (IEEE Press and John Wiley & Sons, 2005), 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’s Citation 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-commission Working 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 editorial board of Digital Signal Processing – A Review Journal (2007-2012), on the board of directors of ACES (2000-2006), vice president of the Applied Computational Electromagnetics Society (ACES), a member of the IEEE Electromagnetics Award board (2004-2007) and an associate editor for the IEEE Transactions on Antennas and Propagation (2004-2010). He is on the editorial board of Journal of Electromagnetic Waves and Applications and Microwave and Optical Technology Letters. He was the chair of the International Conference Technical Committee of IEEE Microwave Theory and Techniques Society # 1 on Field Theory and Guided Waves. He is a member of Sigma Xi and International Union of Radio Science Commissions A and B. He is listed in ISI highly cited and is ranked number 1 in guide 2 research with an h-index of 54 and with 12,548 citations. He is the 2014 President of the IEEE Antennas and Propagation Society. He is also the president of OHRN Enterprises, Inc., a small business incorporated in New York state (1985) performing various research work for various organizations in system analysis. 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
BiodataJun-ichi Takada received B.E. and D.E. degrees from Tokyo Institute of Technology (Tokyo Tech) in 1987 and 1992, respectively. He was a Research Associate at Chiba University in 1992-1994, and an Associate Professor at Tokyo Tech in 1994-2006. He has been a Professor in Tokyo Tech since 2006. In 2003-2007, he was also a Researcher in National Institute of Information and Communications Technology. His current interests include the radiowave propagation and channel modeling for various wireless systems, and regulatory issues of spectrum sharing. He served as a secretary and the chair of IEICE Technical Committee on Software Radio in 2001-2007 and 2007-2009, respectively. He served as the chair of measurement WG in ITU-R TG 1/8 on compatibility between UWB devices and radiocommunication services in 2005. He has been involving in the European COST action on wireless communications (COST 273, 2100, IC 1004) for more than ten years, and served as the co-chair of SIG in body communications in COST 2100 “Pervasive Mobile & Ambient Wireless Communications”. He currently serves as an assistant secretary of Japan National Committee of International Union of Radio Science (URSI), and vice chair of Consortium of White Space Users for Coordination of Operation in Japan. He has extensively involved in the international cooperation and development projects in East and South East Asia. He is currently working with the Department World Heritage in Luang Prabang, Lao PDR in database and GIS application, and with the Mongolian State University of Education in development of in-service teacher training materials using ICT. He has contributed to many official development assistance of Japanese government in South East Asian Universities and there networks, such as Southeast Asia Engineering Education Development Network (AUN/SEED-Net) and Institute of Technology Cambodia. He serves as the chair of the Study Group of Engineering and International Development in Japan Society of International Development (JASID). He received the Achievement Award in 2009, and the Best Paper Award in 1995 from IEICE, and Best Paper Awards in 2005 and 2013 from IEICE Communications Society. He is a fellow of IEICE, a senior member of IEEE, and a member of ECTI Association Thailand and JASID. BiodataHimdi, Mohamed Date of birth: 08 July 1963, Morocco Nationality: French DEGREES: Ph.D., from the University of Rennes 1 (France) in 1990 in signal processing and telecommunications. Since 2003: Professor at the Rennes 1 University The head of high frequency and antenna department at IETR (Institut d’electronique et Telecommunications de Rennes) from 2003 to 2010. His research activities concern the passive and active millimetre-wave antennas. His research interests also theoretical and applied computational electromagnetics, development of new architectures of printed antenna arrays and new 3-D antenna technologies. He is the author and co-author of 83 journal papers and more than 200 papers in conference proceedings. He has received 31 patents in the area of antennas. He is also author/co-author of five book chapters. He participates actively on European Antenna Centre Excellence (ACE) in millimetre and integrated antennas activities. Co-Organizer each two years of ESOA Courses “MM-wave antenna design and technologies” in Rennes. Session Co-Chair in ANTEM’05, EUCAP06, EUCAP2014. Co-Organizer of two Thematic Days in Rennes concerning “Millimeter waves antennas” and “Large bandwidth antenna”. Repsonsable of many international collaboration between France and Canada, India, Saudia Arabia and Japan. Invited Professor in 2013 in Carleton University for cotutelle collaboration. He is expert from ANR, DGA, CNRS and ANRT, and supervisor of more than 35 PhD student He received the 1992 ISAP conference Young researcher Scientist Fellowship (Japan) and, 1995, an award from the International Union of Radio Scientists (Russia). He was Laureat of the second national competition for the creation of compagny in innovative technologies in 2000 (Ministry of Industry and Education, France). He was superviser of Sébastien Palud “PhD DGA Award” in 2009 and Lilia Manac’h “Silver Award for Young Scientist Awards” at IUMRS-ICEM2012 conferences in Japan

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