Prof. Prabhakar H. Pathak

Professor Emeritus, The Ohio State University, ECE Dept., Columbus, Ohio, USA Adjunct Professor, University of South Florida, Tampa, Florida, USA


ABSTRACT: Compact range technology provides sensitive systems for near zone measurements of far zone antenna and scattering patterns. The compact range system analyzed here consists of a focal fed offset parabolic reflector antenna, whose near zone field approximates a uniform plane wave over a significant fraction of its projected aperture. The justification for the near field measurements of far zone patterns is obtained here using generalized reciprocity or reaction theorems together with the uniform geometrical theory of diffraction (UTD). Dual reflector and other compact ranges can be analyzed similarly. This reaction theorem based analysis also directly provides an analytical estimate of the errors in the measurements due to deviation of the compact range field from that of a uniform plane wave with a prescribed polarization. These errors result from various factors such as the effects of diffraction by reflector edges, the effects of cross polarization from the reflector surface and the generally tapered pattern of the feed for the compact range reflector. Methods for reducing these errors are discussed. Additional errors also result from multiple wave interactions between the compact range and the antenna or scattering object being measured, etc. The analysis developed here can be employed to systematically quantify errors in the measurements, and hence to optimize the performance of compact ranges. It is important to note that one measures only reactions and not the radiated/scattered fields directly, for only reactions are observables, such as voltages and currents, while fields are not even though fields of course exist. Hence, it becomes natural to use reaction theorems for the analysis of antenna/scattering measuring systems.

Prabhakar H Pathak : received his Ph.D. (1973) in Electrical Engineering from the Ohio State University (OSU). Currently he is Professor Emeritus at OSU, and Adjunct Professor at the Univ. of South Florida. Prof. Pathak is regarded as a codeveloper of the uniform geometrical theory of diffraction (UTD). His research interests continue to be in the development of new UTD ray solutions in both the frequency and time domains, as well as in the development of fast beam and hybrid (ray and numerical) methods for analyzing electrically large electromagnetic (EM) antenna and scattering problems, including reflector systems and conformal phased arrays. His work includes the development of analytical tools for predicting EM radiation and mutual coupling associated with antennas/arrays on large airborne/spaceborne platforms. He is also working on novel methods related to near field measurements of far zone antenna patterns. Prof. Pathak has been presenting short courses and invited talks at conferences and workshops both in the US and abroad. He has authored/coauthored over hundred journal and conference papers, as well as contributed chapters to seven books. Prior to 1993, he served two terms as an associated editor for IEEE Trans AP. He was appointed IEEE AP-S distinguished lecturer during 1991-1993, and was later appointed as chair of the distinguished lecturer program for the IEEE AP-S during 1995-2005. He was an IEEE AP-S AdCom member in 2010. He received the 1996 Schelkunoff best paper award from IEEE AP-S; the ISAP 2009 best paper award, the George Sinclair award (1996) from the OSU ElectroScience Laboratory, and the IEEE Third Millenium medal from AP-S in 2000. Prof. Pathak received the IEEE AP-S distinguished achievement award in 2013. He is an IEEE Life Fellow and a member of URSI commission B.

Prof. Levent Sevgi

Electrical – Electronics Engineering Department
OKAN University, Engineering Faculty,


ABSTRACT: The role of EM fields in our lives has been increasing. Communication, remote sensing, integrated command/control/surveillance systems, medicine, environment, education, marketing, defense are only a few areas where EM fields have critical importance. We have witnessed the transformation from “Engineering Electromagnetics” to “Electromagnetic Engineering” for the last few decades after being surrounded by electromagnetic waves everywhere. Among many others, electromagnetic compatibility (EMC) engineering is the most important one since it necessitates establishing an intelligent balance between strong mathematical background (theory), engineering experience (practice), and modeling and numerical computations (simulation).

This tutorial explores the fundamentals of EMC engineering and examines the concepts and underpinnings of electromagnetics. It highlights the procedures from design to market for both technical and non-technical issues, including market control, accreditation, calibration, EM signal environments, noise, interference, EMC tests and measurement, signal integrity, and EMC mitigation and protection. Electromagnetic model, circuit model, two-port circuit definitions, grounding, common and differential model currents, and microstripline circuits are explored. It also covers antennas and antenna calibration, including communication antennas, normalized site attenuation (NSA), loop antennas, and loop antenna calibration (LAC). Practical aspects and challenging issues in different sectors – from defense industry to telecommunications, space industry to automotive sector and fast trains, to commercial electronics, white goods, etc., are discussed.

Prof. Sevgi Born in Akhisar / Turkey on 1st January 1958.

He received his BsEE, MsEE and PhD degrees in Electronic Engineering from Istanbul Technical University (ITU) in 1982, 1984 and 1990, respectively. In 1987, while working on his PhD, he was awarded a fellowship that allowed him to work with Prof. L. B. Felsen at Weber Research Institute / New York Polytechnic University York for two years. His work at the Polytechnic concerned the propagation phenomena in non-homogeneous open and closed waveguides.

He was with Istanbul Technical University (1991–1998), TUBITAK-MRC, Information Technologies Research Institute (1999–2000), Weber Research Institute/Polytechnic University in New York / USA (1988–1990), Scientific Research Group of Raytheon Systems, Canada (1998 – 1999), Center for Defense Studies, ITUV-SAM (1993 –1998 and 2000–2002) and with University of Massachusetts, Lowell (UML) MA/USA as a full-time faculty (2012 – 2013) and with Dogus University (2001-2014). Since Sep 2014, he has been with Okan University.

He has been involved with complex electromagnetic problems and complex communication and radar systems for nearly three decades. His research study has focused on propagation in complex environments, analytical and numerical methods in electromagnetic, EMC/EMI modeling and measurement, communication, radar and integrated surveillance systems, surface wave HF radars, FDTD, TLM, FEM, SSPE, and MoM techniques and their applications, RCS modeling, bio-electromagnetics. He is also interested in novel approaches in engineering education, teaching electromagnetics via virtual tools. He also teaches popular science lectures such as Science, Technology and Society.

He is a Fellow member of the IEEE, an AdCom member of the IEEE Antennas and Propagation Society (AP-S) (2013 - 2015), the writer/editor of the “Testing ourselves” Column in the IEEE Antennas and Propagation Magazine (Feb 2007 -) and a member of the IEEE AP-S Education Committee (Jun 2006 -), a member of the IEEE AP-S Field Award Committee (Jan 2018 -). He is also a member of several editorial boards (EB), such as the IEEE Antennas and Propagation Magazine (Feb 2007 -), the IEEE Access (2017 - 2019), Wiley’s International Journal of RFMiCAE (Jan 2002 -), etc.

He has published more than 10 books in English and Turkish, nearly 200 journal/magazine papers/tutorials and attended 100+ international conferences/symposiums.

His three books Complex Electromagnetic Problems and Numerical Simulation Approaches (2003), Electromagnetic Modeling and Simulation (2014) and Radiowave Wave Propagation and Parabolic Equation Modeling (2017, with Gökhan Apaydin) were published by the IEEE Press & Wiley. His book A Practical Guide to EMC Engineering (2017) was published by ARTECH House.

Prof. Kin-Lu Wong

Kin-Lu WONG, National Chair Professor, IEEE Fellow, Thomson Reuters Highly Cited Researcher Elsevier Most Cited Researcher, IEEE AP-S AdCom Member/Transactions Track Editor Distinguished Chair Professor, Dept. of Electrical Engineering National Sun Yat-sen University, Kaohsiung 80424, Taiwan

3.Multi-Gbps High-Dimensional MIMO for 5G Mobile Devices and MIMO Capacity/Throughput Verification

ABSTRACT: High-Dimensional MIMO antennas are promising for application in next-generation mobile devices such as the smartphone for the fifth-generation (5G) communications to achieve multi-Gbps throughput with user’s hand holding and body blocking. It has recently been demonstrated that larger than 12 decoupled MIMO antennas are feasible to be embedded in the limited space in the smartphone to operate with 12 MIMO streams. In this case, larger than 5-Gbps throughput can be achieved with 100-MHz bandwidth only. A MIMO capacity/throughput testbed has also been developed for MIMO performance verification. Results of the multi-Gbps High-Dimensional MIMO in typical indoor and outdoor propagation scenarios will be presented and its potential applications for 5G communications will be discussed.

Prof. Kin-Lu Wong is a National Chair Professor of Ministry of Education, a Distinguished Researcher of Ministry of Science and Technology, a Distinguished Chair Professor with National Sun Yat-sen University, Taiwan, a Thomson Reuters Highly Cited Researcher, an Elsevier Most Cited Researcher, an IEEE Fellow, an elected IEEE Antennas and Propagation Society AdCom member, and a Track Editor of IEEE Transactions on Antennas and Propagation.

Prof. Wong was Senior Vice President of National Sun Yat-sen University in 2007~2012. He has graduated 55 PhD students, published 570 refereed journal papers, and 300 conference articles, and has been granted over 300 patents. Prof. Wong’s published articles have been cited over 26,700 times with an H-index of 77 in Google Scholar. He was General Chairs of 2012 APMC (Asia-Pacific Microwave Conference), 2014 ISAP (International Symposium on Antennas and Propagation), and 2016 APCAP (Asia-Pacific Conference on Antennas and Propagation) held in Kaohsiung, Taiwan. He has been an International Steering Committee member for many international conferences.

Dr Clency Lee-yow.

Dr. Clency Lee-Yew graduated from Queen Mary Collage in London, Uk with a B.Sc. and a Electrical Engineering. He spent one year with the university as a research assiatant before joining Com Dev Internation in Cambridge, Ontario, Canada where he worked as a senior engineer designing a variety of reflector antenna feeds for satellite communication. In 1994, he joined Custom Microwave Inc. (CMI) and took over as VP of operations. He became President of CMI in 1999 and has since transformed the company into a major supplier of high performance reflector antenna feeds for satellite communications. Since that time,CMI has supplied feeds for more than 220 sate llites.

4. Feed Design, Manufacture, Test and Qualification for Satellite Applications

ABSTRACT: Most communication satellites use reflector antennas to simultaneously transmit and receive RF signals for communicating with antennas on the ground. A key element of the reflector antenna system is the feed. Many factors should be considered during the feed design process to arrive at a cost-effective solution. These include bandwidth, polarization, power handling, passive inter-modulation levels, edge taper, isolation between the transmit and receive bands, insertion loss, envelope, port locations, mass, and environmental requirements. This presentation provides an overview of how these factors affect the choice of components, their design approach, choice of material, method of fabrication, integration and test methods used to realize a typical high-performance feed for satellite application.

Lot Shafai

University of Manitoba, Canada

5. Problems of Antenna Miniaturization and possible Remedies

ABSTRACT: Wireless communication is becoming an essential part of most new technologies, especially in personal communication, remote sensing, autonomous navigation, medical imaging and structural or personal health monitoring. Since the dominant means of information exchange is electromagnetic waves, they need antennas to transmit and receive the waves and electronics to process them. However, antennas must interface two separate bounded and unbounded media, where waves have distinct and different sizes. Consequently, to interact efficiently with waves their dimensions have become wavelength dependent, limiting their size reductions. This is the major impediment for antenna miniaturization. On the other hand, advancement of traditional technologies and emergence of new ones require ongoing size reductions to incorporate more features and operate at lower cost. This size discrepancy, thus, has made antennas the “Achilles’ heel” of technology progress, and is not limited to any particular area. Any small reduction in the antenna size, without deteriorating their performance, will provide a major progress in related technologies. Planar antennas are miniaturized in one dimension, and this presentation will highlight the penalties paid for miniaturizing their other dimensions, followed by new designs that can overcome the problems.

Bio: Lotfollah Shafai B.Sc. from University of Tehran in 1963 and M.Sc. and Ph.D., from University of Toronto, in 1966 and 1969. In November 1969, he joined the Department of Electrical and Computer Engineering, University of Manitoba as a Lecturer, Assistant Professor 1970, Associate Professor 1973, Professor 1979, Distinguished professor 2002, and Distinguished professor Emeritus 2016. His assistance to industry was instrumental in establishing an Industrial Research Chair in Applied Electromagnetics at the University of Manitoba in 1989, which he held until July 1994. In 1986, he established the symposium on Antenna Technology and Applied Electromagnetics, ANTEM, at the University of Manitoba, which has grown to be the premier Canadian conference in Antenna technology and related topics. He has been the recipient of numerous awards. In 1978, his contribution to the design of the first miniaturized satellite terminal for the Hermes satellite was selected as the Meritorious Industrial Design. In 1984, he received the Professional Engineers Merit Award and in 1985, "The Thinker" Award from Canadian Patents and Development Corporation. From the University of Manitoba, he received the "Research Awards" in 1983, 1987, and 1989, the Outreach Award in 1987 and the Sigma Xi Senior Scientist Award in 1989. In 1990 he received the Maxwell Premium Award from IEE (London) and in 1993 and 1994 the Distinguished Achievement Awards from Corporate Higher Education Forum. In 1998 he received the Winnipeg RH Institute Foundation Medal for Excellence in Research. In 1999 and 2000 he received the University of Manitoba Research Award. He is a life Fellow of IEEE and a life Fellow of The Royal Society of Canada. He was a recipient of the IEEE Third Millenium Medal in 2000 and in 2002 was elected a Fellow of The Canadian Academy of Engineering and Distinguished Professor at The University of Manitoba. In 2003 he received an IEEE Canada “Reginald A. Fessenden Medal” for “Outstanding Contributions to Telecommunications and Satellite Communications”, and a Natural Sciences and Engineering Research Council (NSERC) Synergy Award for “Development of Advanced Satellite and Wireless Antennas”. He held a Canada Research Chair 2001-2016 in Applied Electromagnetics and was the International Chair of Commission B of the International Union of Radio Science (URSI) for 2005-2008. In 2009 he was elected a Fellow of the Engineering Institute of Canada, and was the recipient of IEEE Chen-To-Tai Distinguished Educator Award. In 2011 he received the Killam Prize in Engineering from The Canada Council, for his “outstanding Canadian career achievements in engineering, and his research on antennas”. In 2013 he received The “John Kraus antenna Award” from IEEE Antennas and Propagation Society “For contributions to the design and understanding of small high efficiency feeds and terminals, wideband planar antennas, low loss conductors, and virtual array antennas”. In 2014 he was the recipient of Edward E. Altschuler Best paper Prize from IEEE APS Magazine, and in 2016 the best paper award from IEEE ANTEM. In 2017, International Union of Radio Science, URSI, awarded him the Booker Gold Medal “For outstanding contributions to antenna miniaturization by electromagnetics and numerical techniques, small satellite terminals, planar antennas, invention of virtual reflectors, low loss engineered conductors and dielectric film components and antennas”. In 2018, he was the recipient of IEEE Antennas and Propagation Society’s Distinguished Achievement Award “For contributions to singular electromagnetics, moment methods, reflector feeds and virtual arrays, wideband antennas, gain enhancement in miniaturized antennas and dielectric film circuits and antennas”


Dr. C. J. Reddy

Vice President of Business Development – Electromagnetics, Americas Altair

1. Hybrid Computational Techniques for Analysis of Airborne Antennas and Radomes

ABSTRACT: With growing communications, nowadays there are increasingly sophisticated antenna systems with associated electronics aboard aircrafts. Advances in electromagnetic (EM) simulations have significantly improved the design process for such systems, resulting in reduced testing time and costs. EM simulations are widely used in the aerospace industry for antenna design, placement and airborne radars. Simulations can be broadly categorized into full-wave and asymptotic solutions. Asymptotic solutions also solve Maxwell Equations, but with appropriate assumptions and approximations. While full wave solutions are accurate, they are computationally expensive when applied to electrically large structures such as aircrafts. While asymptotic solutions may provide an alternative, they may not be suitable for modeling complex antenna geometries while mounted on the aircraft. In this talk, we will review hybrid computational techniques that are becoming popular to analyze and optimize antenna designs as well as antenna placement on air borne platforms. Efficient hybrid methods for airbone radome analysis will also be presented.

BIO: Dr. C.J. Reddy : is the Vice President, Business Development-Electromagnetics for Americas at Altair Engineering, Inc.( At Altair, he is leading the marketing and support of commercial 3D electromagnetic software, FEKO ( in Americas. Dr. Reddy was a research fellow at the Natural Sciences and Engineering Research Council (NSERC) of Canada and was awarded the US National Research Council (NRC) Resident Research Associateship at NASA Langley Research Center. While conducting research at NASA Langley, he developed various computational codes for electromagnetics and received a Certificate of Recognition from NASA for development of a hybrid Finite Element Method/Method of Moments/Geometrical Theory of Diffraction code for cavity backed aperture antenna analysis. Dr. Reddy is a Fellow of IEEE, Fellow of Applied Computational Electromagnetics Society (ACES) and a Senior Member of Antenna Measurement Techniques Association (AMTA). Dr. Reddy served on ACES Board of Directors from 2006 to 2012 and again from 2015 to 2018. Dr. Reddy was awarded Distinguished Alumni Professional Achievement Award by his alma mater, National Institute of Technology (NIT), Warangal in 2015. He published 37 journal papers, 77 conference papers and 18 NASA Technical Reports to date. Dr. Reddy is a co-author of the book, “Antenna Analysis and Design Using FEKO Electromagnetic Simulation Software,” published in June 2014 by SciTech Publishing (now part of IET). Dr. Reddy was the General Chair of ACES 2011 Conference held in Williamsburg, VA during March 27-31, 2011. And also ACES 2013 conference, Monterey CA (March 24-28, 2013) as well as the General Chair of ACES 2015 conference held in Williamsburg, Virginia during March 22-26, 2015. He was the Co-General Chair of 2014 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting held during July 6-11, 2014 in Memphis, TN. Dr. Reddy is the General Chair for AMTA 2018 conference to be held in Williamsburg, Virginia during November 3-8, 2018.

Prof. Dr. N.N.S.S.R.K. PRASAD
2. Requirements of Antennas for Next Generation Stealth Fighter Aircrafts

ABSTRACT: Fighter aircrafts draw their lethal and survivable strengths from the Sensor Systems that are installed on them. The typical sensor systems that are essential for combat aircrafts are Radar, EW System, Communication-Navigation-Identification (CNI) systems. Stealth fighter aircrafts demand different requirements of antennas of their sensors on the aircraft when compared to non-stealth fighter aircrafts. All the antennas on Stealth Fighters have to be primarily conformal or concealed to produce as low RCS as possible of the aircraft. This presentation brings the requirements, issues associated with and existing and futuristic technologies for these antennas of next generation stealth fighter aircrafts.

BIO: Dr. N.N.S.S.R.K. Prasad: More than 31 years of Experience in Research, Design and Development. Presently working as Scientist ‘H’ (Outstanding Scientist) and Technology Director (LCA Payloads) in Aeronautical Development Agency (ADA).

Joined ADA in 1998 from SAMEER-Mumbai (former group of Tata Institute of Fundamental Research (TIFR)-Mumbai), where he was working (as Head-Signal Processing Group) since 1986.

B.Tech., in Electronics and Communication engineering and M.Tech., in Controls and Instrumentation from JNTU College of engineering, Kakinada, (A.P.) in 1985 and 1987 respectively. Obtained Ph.D. in Communication Engineering from IIT-Bombay in 2003.

Worked and contributed for Prestigious and very important National Projects like MST Radar for atmosphere research of ISRO (NARL), Opto-electronic Integrated Circuits project for Ministry of Information Technology, RF Networking of Indian Light Houses & Radio Beacon projects of Ministry of Surface Transport, Active Seeker project of DRDO etc. during his tenure at SAMEER-Mumbai.

Currently he is working for another prestigious project of the nation i.e. Tejas- Indian Light Combat Aircraft (LCA) project, its variants for Indian Air Force (IAF) and Indian Navy (IN). He is also working for Advanced Medium Combat Aircraft and other projects of ADA.

He has more than 100 publications in national and international conferences and journals. He is a senior member of IEEE, USA, Fellow of IETE, IE, OSI, VEDA, Life Member of ISOI, AeSI, ASCI and CSI and Member of IET, UK and AOC, USA.

Awarded 'DRDO Scientist of the Year' for 2014.

Guided independently many under graduate and post-graduate projects. Under his guidance, two PhD thesis programs completed for VTU in 2014. Presently guiding five PhDs programs under VTU, Belgaum, Karnataka and one under MIT, Chennai, Tamilnadu.

Reviewer for Journals of AeSI-India, IEEE-USA and IEE (IET)-UK.

PhD/M.Tech external examiner for IIT-Bombay, DIAT-Pune, VIT-Vellore-Tamilnadu, VTU-Belgaum-Karnataka and paper setter for VTU-Karnataka.

Dr. C.B. Ravipati,
Intelsat Corporation, McLean, Virginia, USA
3. Overview of Satellite Communication Systems, Antennas & Propagation Effects

ABSTRACT: A general overview of the satellite networks, types of satellites and orbits and their missions will be presented initially. Impact of antenna characteristics and propagation effects on communications links will be addressed. The second part of the talk will be devoted to the space segment including key features of communications payloads. Next, the ground segment considerations for various applications will be addressed. A few examples of satellite link calculations will be presented. Satellite constellations have received attention in the recent past and some of those systems will be outlined. The presentation concludes with a summary of major satellite operators, regulatory aspects, and market trends.

Biography: Dr. C.B. Ravipati received his Ph.D. degree in Electrical Engineering from the Indian Institute of Technology Kanpur. During 1996-98, he worked as a Post Doctoral Fellow at the University of Manitoba, Winnipeg, Canada. He was employed at MDA Space Corporation, Canada and later at Orbital Sciences Corporation where he was involved with analysis and design of satellite antenna systems and payload hardware ranging from UHF to Ka-band. He is presently working in the Space Systems group at Intelsat Corporation, USA. His responsibilities include systems architecture studies for new communications satellites and services.

He is a Senior Member of IEEE and a reviewer for IEEE Transactions on Antennas and Propagation, IEEE Antennas and Propagation Magazine, and IEEE Antenna and Wireless Propagation Letters. He has presented peer-reviewed papers at several international conferences and co-authored two chapters in “Handbook of Reflector Antennas and Feed Systems” published in 2013 by the Artech House.

Prof. Atif Shamim
4. Additively Manufactured Flexible and Wearable Antenna Systems

ABSTRACT: With the advent of wearable sensors and internet of things (IoT), there is a new focus on electronics which can be bent so that they can be worn or mounted on non-planar objects. Due to large volume (billions of devices), there is a requirement that the cost is extremely low, to the extent that they become disposable. The flexible and low-cost aspects can be addressed through additive manufacturing technologies such as inkjet, screen and 3D printing. This talk introduces additive manufacturing as an emerging technique to realize low cost, flexible and wearable antenna systems. The ability to print electronics on unconventional mediums such as plastics, papers, and textiles has opened up a plethora of new applications. In this talk, various innovative antenna designs will be shown which have been realized through additive manufacturing. A multilayer process will be presented where dielectrics are also printed in addition to the metallic parts, thus demonstrating fully printed antennas. Many new functional inks and their use in tunable and reconfigurable antennas will be shown. In the end, many system level examples will be shown, primarily for wireless sensing applications. The promising results of these designs indicate that the day when electronics can be printed like newspapers and magazines through roll-to-roll and reel-to-reel printing is not far away.

Biography: Atif Shamim – received his MS and PhD degrees in electrical engineering from Carleton University, Canada in 2004 and 2009 respectively. He was an NSERC Alexander Graham Bell Graduate scholar at Carleton University from 2007 till 2009 and an NSERC postdoctoral Fellow in 2009-2010 at Royal Military College Canada and KAUST. In August 2010, he joined the Electrical Engineering Program at KAUST, where he is currently an Associate Professor and principal investigator of IMPACT Lab. He was an invited researcher at the VTT Micro-modules Research Center (Oulu, Finland) in 2006. His research work has won best paper awards in IEEE EuWiT 2008, IEEE IMS 2016, IEEE MECAP 2016 and honorable mention prizes in IEEE APS 2005, IEEE IWAT 2006, IEEE IMS 2014, IEEE IMS 2017 (3MT competition). He was given the Ottawa Centre of Research Innovation (OCRI) Researcher of the Year 2008 Award in Canada. His work on Wireless Dosimeter won the ITAC SMC Award at Canadian Microelectronics Corporation TEXPO in 2007. Prof. Shamim also won numerous business-related awards, including 1st prize in Canada’s national business plan competition and was awarded OCRI Entrepreneur of the year award in 2010. He is an author/co-author of over 200 international publications, an inventor on 20 patents and has given over 40 invited talks at various international forums. His research interests are in innovative antenna designs and their integration strategies with circuits and sensors for flexible and wearable wireless sensing systems through a combination of CMOS and additive manufacturing technologies. Dr. Shamim is a Senior Member of IEEE and serves on the editorial board of IEEE Transactions on Antennas and Propagation.

Prof. Tadashi Takano

(Professor Emeritus, JAXA) Hiroshi Matsumoto (Chairman, Space Solar Power Systems Society)

5. Antenna and Propagation for Microwave Power Transmission in Space

ABSTRACT: A large amount of power can be transmitted on a microwave from space to the earth, as is called a space solar power system (SSPS). The SSPS is a powerful solution to the world-wide issue of energy and environment. This scheme is particularly beneficial to equatorial countries as the satellite flies over the equator.

The microwave power transmission needs quite large transmitting and receiving antennas on a satellite and on the ground, respectively. Accordingly, the concept of antennas and their way of construction should be quite different from conventional ones. The transmitted power beam should be accurately and precisely controlled to be put into the receiving aperture. The influence of space plasma should be considered in beam propagation. On the other hand, suitable measures against emergency have to be investigated.

This presentation will explain the whole idea of SSPS, and the current status of the aforementioned technology study, as may gives the audience some hints of new research topics. Finally, it should be noted that a SSPS needs global collaboration in both research and construction phases, due to large scaled launching and assembling in space and a particular role of equatorial countries.

Biography: Tadashi Takano – received B. S. and M. S. in Electric Engineering and Electronic Engineering, respectively, and Ph. D. from the University of Tokyo, in 1967, 1969, and 1972, respectively.

In 1972, he joined the Electrical Communication Laboratories of Nippon Telegraph and Telephone (NTT) Public Corporation. In 1984, he moved to the Institute of Space and Astronautical Science, Japan, where he was Professor in Radio Tracking. Later, the institute was merged to form JAXA. In 1991 he became Professor in Electronic Engineering in the Graduate School of the University of Tokyo. In retirement, he was awarded a professor emeritus. In 2008, he moved to Nihon University as a professor in Electronics and Computer Science, where he is now a fellow researcher after retirement.

His research interests originally included antenna engineering and radio communications. He extended his research field to radio wave applications to space debris monitoring, natural hazard detection, and wireless power transfer. He played a role of a chairman in several domestic or international academic societies. He contributed to planning of R&D strategy in NTT and several governmental organizations.

He received several awards from the Institute of Electronics, Information and Communication Engineers (IEICE) of Japan su as the 1992 Excellent Paper Award, and the 1983 Kajii Award from NTT, iWAT2010 Best Paper Prize, and so on.

Dr. Takano is a member of IEEE (Fellow), IEICE (Fellow), Institute of Electrical Engineers of Japan, URSI, Japan Society for Aeronautical and Space Science, Japan Rocket Society, Space Solar Power Research Society, Seismology Society of Japan, American Geophysical Union.

Prof. Ahmed A. Kishk

Concordia University, Montreal, Canada

6. Simple Low Profile High Efficient 60 GHz Antenna Array for 5G Applications

ABSTRACT: Two concepts are used to design high gain antenna elements will be presented. The antenna is designed on a thin dielectric substrate. These elements achieve better than 11 dBi gain. One design is for narrowband application of around 2 GHz, and another for better than 7 GHz. These elements are larger than a full wavelength. Therefore, their arrays are supposed to have grating lobes, but the element high gain nature is employed to suppress the grating lobes. As the elements are based on printed circuit technology, the corporate feeding network has been based on the same technology, which is known to have strong radiation losses as well as surface waves at these frequencies. Two concepts are used to either reduce such losses or to incorporate it in a constructive way in the array radiation. In some feeding networks, a perfect magnetic conducting packaging concept is used to reduce or suppress the radiation losses. Different 4x4 element arrays will be presented that has a realized efficiency better than 90% and again better than 22dBi. These arrays have been constructed and tested providing measurements in agreement with the simulated results. These arrays are considered to be low-cost antennas for 5G applications.

Biography: Ahmed A. Kishk received the BS degree in Electronic and Communication Engineering from Cairo University, Cairo, Egypt, in 1977, and BSc. in Applied Mathematics from Ain-Shams University, Cairo, Egypt, in 1980. In 1981, he joined the Department of Electrical Engineering, University of Manitoba, Winnipeg, Canada, where he obtained his M. Eng. and Ph.D. degrees in 1983 and 1986, respectively. From 1977 to 1981, he was a research assistant and an instructor at the Faculty of Engineering, Cairo University. From 1981 to 1985, he was a research assistant at the Department of Electrical Engineering, University of Manitoba. From December 1985 to August 1986, he was a research associate fellow at the same department. In 1986, he joined the Department of Electrical Engineering, University of Mississippi, as an Assistant Professor. He was on sabbatical leave at Chalmers University of Technology, Sweden during the 1994-1995 and 2009-2010 academic years. He was a Professor at the University of Mississippi (1995-2011). He was the director of the Center for Applied Electromagnetic System Research (CAESR) during the period, 2010-2011. Currently, he is a Professor at Concordia University, Montréal, Québec, Canada (since 2011) as Tier 1 Canada Research Chair in Advanced Antenna Systems. He was an Associate Editor of Antennas & Propagation Magazine from 1990 to 1993. He is a distinguished lecturer for the Antennas and Propagation Society (2013-2015). He was an Editor of Antennas & Propagation Magazine (1993-2014). He was a Co-editor of the special issue, “Advances in the Application of the Method of Moments to Electromagnetic Scattering Problems,” in the ACES Journal. He was also an editor of the ACES Journal during 1997. He was an Editor-in-Chief of the ACES Journal from 1998 to 2001. He was the chair of Physics and Engineering Division of the Mississippi Academy of Science (2001-2002). He was a Guest Editor of the special issue on artificial magnetic conductors, soft/hard surfaces, and other complex surfaces, in the IEEE Transactions on Antennas and Propagation, January 2005. He was a technical program committee member for several international conferences. He was a member of the AP AdCom (2013-2015) and the 2017 AP-S president.

His research interest includes the areas of millimeter wave antennas for 5G applications, Analog beamforming network, Dielectric resonator antennas, microstrip antennas, small antennas, microwave sensors, RFID antennas for readers and tags, Multi-function antennas, microwave circuits, EBG, artificial magnetic conductors, soft and hard surfaces, phased array antennas, and computer-aided design for antennas; reflect/transmitarray, wearable antennas, and Feeds for Parabolic reflectors. He has published over 325-refereed journal articles and 450 conference papers. He is a co-author of four books and several book chapters and the editor of three books. He offered several short courses in international conferences.

Dr. Kishk and his students received several awards. Dr. Kishk won the 1995 and 2006 outstanding paper awards for papers published in the Applied Computational Electromagnetic Society Journal. He received the 1997 Outstanding Engineering Educator Award from Memphis section of the IEEE. He received the Outstanding Engineering Faculty Member of the Year in 1998 and 2009, Faculty research award for outstanding performance in research in 2001 and 2005. He received the Award of Distinguished Technical Communication for the entry of IEEE Antennas and Propagation Magazine, 2001. He also received The Valued Contribution Award for outstanding Invited Presentation, “EM Modeling of Surfaces with STOP or GO Characteristics – Artificial Magnetic Conductors and Soft and Hard Surfaces” from the Applied Computational Electromagnetic Society. He received the Microwave Theory and Techniques Society, Microwave Prize 2004. He received 2013 Chen-To Tai Distinguished Educator Award of the IEEE Antennas and Propagation Society. In recognition “For contributions and continuous improvements to teaching and research to prepare students for future careers in antennas and microwave circuits, Kishk is a Fellow of IEEE since 1998, Fellow of Electromagnetic Academy, and a Fellow of the Applied Computational Electromagnetics Society (ACES). He is a member of Antennas and Propagation Society, Microwave Theory, and Techniques, Sigma Xi Society, U.S. National Committee of International Union of Radio Science (URSI) Commission B, Phi Kappa Phi Society, Electromagnetic Compatibility, and Applied Computational Electromagnetics Society.