Tutorials

Tutorial 1

Pixelization and Binary Optimization: A Trend to Fully Automated and Optimum Design of Microwave Devices Based On PCB


Biography

Pr. Vahid Nayyeri (Senior Member, IEEE) was born in Tehran, Iran. He received the B.Sc. degree from the Iran University of Science and Technology (IUST), Tehran, Iran, in 2006, the M.Sc. degree from the University of Teheran, Tehran, Iran, in 2008, and the Ph.D. degree from the IUST in 2013, all in electrical engineering.

Pr. From 2007 to 2010, he worked as an RF-circuit designer at the IUST satellite research center. He then was the technical manager of three research and industrial projects at the Antenna and Microwave Research Laboratory at IUST. In June 2012 he joined the University of Waterloo, Waterloo, ON, Canada, as a visiting scholar. Presently, he is an assistant professor of the department of satellite engineering, IUST, and also serves as the co-director of the Antenna and Microwave Research Laboratory. He has authored and co-authored one book (in Persian) and over 50 journal and conference technical papers. He has been collaborating with Professor Omar M. Ramahi's group at University of Waterloo, since 2012. His research interests include applied and computational electromagnetics and microwave circuits. He is a senior member of IEEE.

He was the General Co-Chair of the “1st National Conference on Space Technology and Its Applications” held in Tehran, Iran in 2019. In 2014, Dr. Nayyeri received the “Best Ph.D. Thesis Award” from the IEEE Iran Section for his research on the modeling of complex media and boundaries in the finite-difference time-domain method. He has served as reviewer to several journals and conferences.


Abstract

Influential people are never satisfied with the status quo. They're the ones who constantly ask, 'What if?' and 'Why not?'
They're not afraid to challenge conventional wisdom, and they don't disrupt things for the sake of being disruptive;
they do it to make things better.

Travis Bradberry

“What if ?”

What if there is a way to achieve the maximum bandwidth in microwave couplers?

What if there is a way to achieve the maximum sensitivity in microwave sensors?

What if there is a way to find the optimum pattern for the unit cell of a metasurface?

What if there is way to find the optimum design for microwave devices?

And, what if there is a way to fully automate the design of electromagnetics-based devices?

Nowadays, using computer-aided design (CAD), microwave designers are capable of delivering designs that meet the predefined requirements as long as these requirements are not extreme. For this purpose, they first draw a topology of the design according to the classical methods, and then using optimization techniques, which are embedded in almost all CAD packages, they optimize the sizes, dimensions and other parameters to achieve the required goals. The question which may arise is that “is it the best design one can achieve?” Since the optimization is about changing the dimension of the model, not its shape and topology, the performance of the final optimized design highly depends on the initial design topology and so it may not be the best solution. What if there is way to find the optimum design without having an initial model? If that were the case, the design can be performed in a fully automated, complete-cycle procedure.

In this tutorial,I introduce a robust method to fully automate and optimized the design of microwave devices that are fabricated with printed circuit board (PCB), such as sensors, antennas, couplers and metasurfaces. In this method the shape of the artworks (the pattern to be etched into each copper layer of a PCB) is optimized to achieve the best possible performance. This optimization is not about changing the dimensions of a model but rather about its shape. The required optimization procedure is essentially making a decision as to which parts of the pattering area are covered with metal and which parts are not (etched). This can be achieved by pixelization of the pattering area and applying a binary optimization algorithm. A binary optimizer would assign one of two states to a specific part of the model: one state refers to metallization and the other state to no metallization. These specific parts are generated by dividing the pattering area into pixels. Since there is no need for a proper initial design, the design procedure can be performed in a fully automated fashion.

Pr. Vahid Nayyeri

Tutorial 2

Broadband Absorbers Based on Periodic Structures


Biography

Pr. Habiba Hafdallah Ouslimani was born in Tebessa, Algeria. She received the D.E.S. (Diploma of Higher Education) degree in physics from the University of Science and Technology Houari Boumediene, Bab Ezzouar, Algeria, in 1980, the Master’s degree, Ph.D degree, and the Doctorat d’Etat from the Institute of Fundamental Electronics (IEF), Group of “Rapid Circuits and Quantum Optics (CROQ;) - URA22 CNRS University of Orsay, Paris 11, in 1981, 1983, and 1990, respectively. From 1984 to 1990, she was an Assistant Professor with the Department of Electronics and Industrial Informatics, Institute of Technology Cachan, University of Paris-Sud.
She defends the Doctorat d’Etat diploma (May 1990) on "Study of High-Speed Physical Phenomena in Field Effect Transistors." IEF Univ. Paris 11 Orsay.

She joined the Université Paris Nanterre - P10, France in 1990, as an Associate Professor. She worked between 1990 and 2002 on ultra-fast circuits for high-speed communications (> 40 GB/s). She participated and collaborated on several scientific projects with Alcatel, Thales, .. on the design of high-speed switching circuits (few ps) mainly on the technologies of " InP hetero-structures Bipolar Transistors ". Since 2002, she has been a Full Professor and leads the Applied Electromagnetic Group, Energetic Mechanics and Electromagnetic Laboratory (LEME EA-4416), University Paris-Nanterre (UPN) at the Scientific campus Ville d’Avray. Her current research interests include metamaterials, periodic structures, frequency selective surfaces, and partially reflective surfaces. The main applications of the metasurfaces concern the design of low profile and miniaturized antennas, ultra-thin Radar absorbers, mutual coupling effects reduction, RCS characterization, FSS filters and duplexer. She participated and led, during this last decade, more than six research programs and research contracts with French Clusters, DGA and national grand-groups. From 2011 to 2014, she represented the French DGA in the NATO SET-181 Meeting devoted to Metamaterials for Defence and Security Applications (chaired by Dr. E. Ozbay). She is currently president of the IEEE AP-S France Chapter.


Abstract

In the last decade, various metamaterial based applications have been developed covering low to optical frequencies domains. They were deployed for several applications such as; compact and sub-length antennas, invisible cloaking, super lenses and sensing to name but a few. Large-band electromagnetic wave absorbers with ultra-thin height (much lower than the operational wavelength) and simple fabrication process are good candidates for metamaterial-based design. Their application in electromagnetic compatibility (EMC), stealth (radar cross section reduction) and Electromagnetic Interferences (EMI) reduction are very useful for civilian (decoupling electrical equipment’s and devices for example) and broadband capability in defense.

In this tutorial, we will present some examples of designed and experimentally characterized thin broadband absorber structures. The metamaterial-based absorber (MA) operate in the radar bandwidth, center frequency of about 8 to 10 GHz with 3 to 4 GHz bandwidth. An absorption rate more than 90% in the whole bandwidth is obtained under normal incidence. The designed structures achieve a low profile which can reach thickness value that is very close to the theoretical limit.

Pr. Habiba Hafdallah Ouslimani

Tutorial 3

Electroceuticals: How Electromagnetic Fields are changing Biomedicine


Biography

Luciano Tarricone is a Full Professor of Electromagnetic Fields at the University of Salento in Lecce, Italy, where he is the leader of the EML2 (Electromagnetic Labs Lecce). He got his Laurea Degree (summa cum Laude, 1989) and his Ph.D. (1994) from the University of Rome "La Sapienza", with a thesis on Bio Electromagnetics. In 1990 he was a Research Fellow at the National Health Institute in Rome, Italy. Between end of 1990 and 1994 he was a System Engineer and Researcher with the IBM European Center for Scientific and Engineering Computing. Between 1994 and 2001 he was a Researcher and Professor e Incaricato of EM Compatibility at the University of Perugia, Italy.

Since 2001 he has joined the University of Salento, where he has been Coordinator of the PhD School in Information Engineering, and Coordinator of the Bachelor and Master Courses in Information Engineering and Communication Engineering.

He is a consultant for many different research and industrial institutions in Italy and in the world. He is the Italian representative in the General Assembly of the European Microwave Association. He has been or is the General Chair or General TPC Chair, or plenary speaker, for several important international conferences, such as the European Microwave Week or the Mediterranean Microwave Symposium. He was the founder of two spin-off companies.

He is Associate Editor for several important journals (Int. Journal of MW and Wireless Technology, Wireless Power Transfer Journal, MW and Optical Techn. Letters, and several others) and a reviewer for all the most important journals in the fields of his interest. He has authored more than 120 papers in international peer-reviewed journals, more than 400 papers in international conferences and workshops, and 3 books. He was awarded as Alfiered el Lavoro by the Italian Presidente della Repubblica.


Abstract

In the recent past the word “electroceutical” has attracted attention and investments. It is a multidisciplinary initiative for medical treatments using electric/magnetic/electromagnetic power to modulate a number of body functions controlled by neurological circuits. Of course, a wide variety of theoretical approaches, technologies and different knowledges converge onto such applications. In this presentation, the important role played by the use of suitable modelling techniques at cell and tissue level will be demonstrated, so as to understand and predict possible therapeutic effects. Furthermore, the fundamental role of wireless power transfer as a supportive technology for implants will be proved. It will be discussed how the combination of the two mentioned theoretical and technological capabilities, extended by flexible/implanted bioelectronics, nanopulses technology, and accurate tissue and organ modelling can open new perspectives to the use of RF technologies in biomedical engineering or biomedicine.

Pr. Luciano Tarricone

Pr. Jean-Marie FLOC'H

Tutorial 4

Reconfigurable Antennas: A challenge for the Futur Communication Systems


Biography

Pr. Jean-Marie FLOC'H was born on September 26th 1952 in Dinan (Bretagne region, France). Since 1984 he is a research engineer at IETR (Institute of Research in Electronics and Telecom of Rennes), CNRS Unit N° 6164 affiliated to INSA (French National Institute of Applied Sciences). He got his Ph.D. degree in Electronics from the same institute in 1992.

In the early years, Pr. Floc’h activity was focused on the support of research programs and training of INSA engineers. Rapidly, he acquired additional responsibilities: characterization and development means and the technical management of the laboratory. With the significant growth of the lab, he gradually held the responsibility of relationships with the industrial players (technology transfer, communication with the companies/ business relations, support of spin-off creation, etc…) as well as the training of staff.

Pr. Floc’h actively participated to the creation of the ESC Department (Electronics and Systems of Communication). He is still committed to the development of technological collaborations between INSA Rennes and the industrial companies.

From 1995 to 2000 Pr. Floc’h held the position of Deputy Director of the IETR (Institute of Research in Electronics and Telecom of Rennes). Since 2003, he is in charge of industrial collaborations at IETR. He is an expert consultant for the Regional Council of Bretagne, Jessica Ouest (a National Research program in Electronics) and the ANVAR (French National Agency for Innovation). He is also involved in the European Network of Excellence called ACE (Antenna Center of Excellence) now EURAAP.

The scientific fields of competencies of Pr. Jean-Marie FLOC'H are around the Antenna, MMIC, VHF active and passive circuits design, Modeling, characterization and applications of wireless communication systems.


Abstract

Wireless communication systems must be able to meet increasing requirements of multiple standards, higher data rates and better use of Frequency Spectrum. To overcome these challenges, antennas need to be flexible and adapt to environment changes. Frequency Reconfigurable Antennas are addressing these complexes and over changing needs and are consequently becoming a hot topic triggering tremendous research interest. This tutorial isa presentation of work from industrial partner and works done in our institute.

First I present some industrial realizations from Ethertronics(US), the first designer for Samsung mobile phone antennas. Next, I present some research work performed in INSA dealing with antenna:
- Reconfigurability in frequency
- Reconfigurability in polarization
- Reconfigurability in radiation pattern
- Reconfigurability in reject frequency

For these purposes, we use different kinds of active and passive technologies: active with varactor, switch and digital capacitance, passive with mechanical reconfigurability and metal liquid.

Finally, we present the prospects with applications using new materials and the issues to be done. This tutorial uses the results of works done during the thesis of Imen Ben Trad, Saber Dakli and Ines Roussi from the university El Manar of Tunis and other research results from INSA.

Our Sponsors