Featured Speakers

Keynote Speaker

Dr. Zoya Popovic
Distinguished Professor, University of Colorado Boulder
Lockheed Martin Corporation Endowed Chair of Radio Frequency Engineering

Monday, October 7th, 8:05 – 8:55 a.m.

Multi beam Phase-Shifterless Antenna Array and Free-space Measurements

Abstract & Bio

This talk describes the analysis, design and measurements of steered and multi-beam phase-shifterless passive and active antenna arrays.  Active arrays include receive, transmit and both full and half-duplex T/R arrays. Examples of arrays from 36 to 956 elements in size and from X to W-band will be given, with various applications, including LEO satellite down-links (8.36GHz), formation-flying satellite links (28GHz), multi-path mitigation (10GHz) and angle-of-arrival detection (through W band).

Zoya Popović received her Dipl. Ing. degree from the University of Belgrade, Serbia, in 1985, and the M.S. and Ph.D. degrees from Caltech, Pasadena, California, in 1986 and 1990, respectively. Her doctoral thesis was on large-scale quasi-optical microwave power combining. She joined the faculty of the University of Colorado in Boulder in August 1990, where she became a full professor in 1998, and received the Hudson Moore Jr. endowed professorship in 2006. She was named Distinguished Professor in 2010 and Lockheed Martin Endowed Chair in 2017. She has developed five undergraduate and graduate electromagnetics and microwave laboratory courses and co-authored (with her late father) Introductory Electromagnetics for the junior-level core course for electrical and computer engineering students, translated to several foreign languages. Her research interests include high-efficiency linear microwave power amplifiers, low-loss broadband microwave and millimeter-wave circuits, medical applications of microwaves, intelligent RF circuits, active antenna arrays, cryogenic circuits, microwave radiometry, and wireless powering for low-power sensors. She was a Visiting Professor at the Technische Universitat Muenchen, Munich, Germany, in 2001 and 2003, and at Supaero (ISAE), Toulouse, in 2014 and a Chair of Excellence at Carlos III University in Madrid, Spain, in 2018.

Invited Speaker

Dr. Philippe Garreau
CEO, Microwave Vision Group)

Tuesday, October 8th, 8:00 a.m.

The Challenges of Using Electronically Scanned Probe Arrays in Aerospace & Defense Antenna Measurement Applications

Abstract & Bio

Over the past 20 years, electronically scanned probe arrays have clearly demonstrated their capability to drastically shorten the measurement time for testing antennas. This antenna measurement technique has been well accepted primarily in the civil telecommunication market. However, the advantages of using electronically scanned probe arrays has not only been a question of speeding up the measurement time. Hence, instead of using these measurement tools for one-shot measurements at the end of any new development, they have been increasingly used from the beginning to the end of development, therefore participating in optimizing all radiated parameters of the system. In the last few years, we have observed a strong interest in using probe arrays for Aerospace and Defense applications. This talk will introduce and discuss the challenges currently being faced regarding the use of probe arrays for testing Aerospace and Defense antennas. 

Philippe is a graduate of SUPELEC, a historically prominent engineering school in France. He began his career at the European Space Agency (ESA) before joining SATIMO in 1992 as an engineer in charge of antenna measurements. He became Managing Director of SATIMO in 1996 and at the age of 46, became CEO of Microwave Vision Group in 2008. He has been the driving force behind the transformation of SATIMO from an independent research unit on the outskirts of Paris to its status as an international Group and a leading supplier of antenna measurement systems, EMC test facilities, and full turn-key test solutions for advancing wireless technology 

EurAAP Invited Speaker

Dr. Elena Saenz
European Space Agency (ESA/ESTEC)

Wednesday, October 9th, 8:00 a.m.

A Scatterometer Operating at Millimetre and Sub-Millimetre Wave Wavelengths: Design, Integration and Testing

Abstract & Bio

Many different materials including composites are used in the field of millimeter wave antennas. Examples of dielectrics, frequency selective surfaces (FSS), sandwich structures, composite resins, ceramics and metal plates can be seen in applications ranging from low frequencies up to sub-mm waves. An accurate characterization of these materials is of vital importance for future missions in the Telecom, Earth Observations and Science domains.

A common way of describing these materials is in terms of reflection, transmission and absorption. This is sufficient in the case of homogeneous materials with perfectly flat and smooth interfaces. When the material is in-homogeneous or rough, however, some of the incoming radiation will be scattered away. To measure this scattering and therefore improve the measurement of reflection, transmission and absorption a scatterometer has been designed and fabricated to operate in the 50 -750 GHz region of the spectrum.

The scatterometer is currently undergoing final installation at ESTEC and during integration and test further research was required to address three factors which were limiting performance: anomalous phase shift, coupling variation, standing waves and lack of normalization of the measured signal. This paper will present the design and describe how these issues were resolved using experimental and simulated data. Finally, the uncertainty evaluation of the measurements will be presented.

Elena Saenz was born in Viana, Navarra, Spain, in 1981. She received the M.Sc. and Ph.D. degrees from the Public University of Navarra (UPNA), Pamplona, Spain, in 2004 and 2008, respectively, both in Telecommunication Engineering. Her doctoral research was focused on the analysis and design of meta-surfaces with emphasis on their application as superstrates for planar antennas.

Until 2008 she was with the Antenna Group, Public University of Navarra. Since then, she has been working at the European Space Research and Technology Centre (ESTEC), European Space Agency (ESA), Noordwijk, The Netherlands with main interest in frequency/polarization selective surfaces, (sub)millimetre wave technologies and applications, antenna measurements and material characterization.

Dr. Saenz received the Loughborough Antennas and Propagation Conference (LAPC) 2006 and 2007 Best Paper Awards and the International Workshop on Antenna Technology (IWAT) 2007 Best Paper Award. In 2008, she received the IEEE Antennas and Propagation Society Graduate Research Award. She was co-author of the best paper in measurements at EuCAP 2018.

Lunch and Learn Speaker

Dr. Daniel Sievenpiper
Professor, University of California San Diego

Wednesday, October 9, 12:00 p.m.

Patterned Meta-surfaces for Manipulating Propagation, Scattering, and Interaction of Waves with Objects and Materials

Abstract & Bio

Beginning with the background on meta-surfaces and artificial impedance surfaces, this talk will introduce the history of holographic impedance pattern generation, methods for guiding waves around objects (cloaking), and tunable surfaces for beam steering. Introducing anisotropy leads to surface waveguides, and techniques for polarization-independent scattering control. However, creating arbitrary, in-homogeneous, anisotropic patterns requires the formulation of new mapping techniques, such as the point shifting method. This enables smooth transitions such as for graded surface wave lenses, and patterns for transition-free steering or shifting waves.  This talk will describe techniques for producing complex impedance patterns for controlling surface waves in a variety of ways. We will also discuss a new one-dimensional interface state known as a “line wave” and the relationship between these waves and photonic topological insulators, as well as chiral surfaces, each of which can enable one-way propagation of waves with unique scattering properties. We will also discuss tunable, nonlinear, and modulated impedance surfaces which have new and interesting absorption properties, such as the ability to distinguish different waveforms or propagation directions, or to enable self-tuning absorbers.

Professor Daniel Sievenpiper joined the UC San Diego faculty in 2010. He received his BS in 1994 and his PhD in 1999 from UCLA, where he studied photonic crystals and other periodic structures, and invented the high impedance electromagnetic surface. Dan joined HRL (the former Hughes Research Laboratories) in Malibu, CA in 1999. During the following 11 years, he and his team developed new electromagnetic structures, with an emphasis on small, conformal, tunable, and steerable antennas. Dan held a variety of technical and management positions at HRL including Director of the Applied Electromagnetics Laboratory. In 2010 he joined UC San Diego, where his research is focused on artificial media, and the integration of active electronics with electromagnetic structures and antennas to enable new capabilities and applications. In 2008, Dan received the URSI Issac Koga Gold Medal. In 2009, he was named as a Fellow of the IEEE. Dan currently has more than 70 issued patents and more than 140 technical publications.

IEEE AP-S Invited Speaker

Dr. J. Ch. Bolomey
Emeritus Professor, University Paris Saclay, France

Thursday, October  10th, 8:00 a.m.

Overview of Microwave-based Imaging Systems for Medical Applications

Abstract & Bio

The possible use of microwaves for medical imaging diagnosis is investigated since the early 80’s. And yet, almost forty years later, it still has not gained undisputable clinical recognition.

Inadvertently stemming from dosimetry and after early experiments on isolated organs, animals or phantoms, microwave imaging investigations moved, around the beginning of the 90’s, to clinical applications, such as breast cancer screening and brain stroke diagnosis. Thanks to a continuous increase of research manpower efforts via multinational projects, and of the computing power, a few start-up companies developed prototypes usable for clinical trials. Today, clinical results are coming back enabling to assess their medical relevance and to serve as guidelines for system improvements, according to the general engineer-physician interaction process followed previously by all the imaging modalities already routinely used in the clinical practice (X-Rays, Ultrasounds, Magnetic Resonance, Nuclear Imaging, etc.).

This overview aims to highlight antenna-related issues encountered in the medical imaging context, which may significantly differ from more usual communication, radar or other sensing scenarios, due to complex near-field patient-dependent interactions and severe constraints of clinical environments. Focused attention is given to different possible criteria to be specifically used, case-by-case, for optimizing antenna design and antenna array configuration. The first Part provides a brief historical review from simplified family trees of microwave components architectures and reconstruction algorithms. Secondly, breast and brain imaging are selected as relevant test cases to illustrate achieved sensitivity and specificity performances, giving a more than ever pragmatic idea of how far microwaves have arrived from the “patient bed”. The third Part is dedicated to still open issues and remaining challenges, and to suggested solutions for tackling them. Among those suggestions, the first ones consist of exploiting the best of already-existing microwave technologies (which is still far from being the case today), such as those used in MIMO communications for instance, and to anticipate the impact of coming advanced developments such as meta-materials or 5G, RFID, and IoT components. To conclude, two other major issues aiming to identify the possible space to be occupied by microwaves in the medical imaging market will be addressed: i) their substitution and/or complementary aspects in terms of imaging capabilities with respect to other existing modalities which, on their own sides, will also continually improve, and more generally ii), the currently increasing use of Artificial/Augmented Intelligence in the routine medical practice, and more specifically the impact of Machine Learning on diagnosis imaging, which already paves the way to promising improvements for microwave systems.

Jean-Charles Bolomey is currently Emeritus Professor at Paris-Saclay University (PSU), France. Graduated from Supelec in 1963, he obtained a Ph.D. degree of PSU in 1971, where he became Professor in 1976 and conducted his research in the Laboratoire des Signaux et Systemes, a joint unit of PSU, Supelec and the National Center for Scientific Research.

Since 1981, his contributions, deliberately oriented toward innovative technology transfer and valorization, have been devoted to Near-Field and Very-Near-Field techniques in their broad acceptation, including antenna measurement, EMC testing as well as Industrial-Scientific-Medical (ISM) applications. He more particularly promoted using modulated probe array technology for rapid Near-Field characterization of intentional and non-intentional radiating systems. He co-authored with Professor F.Gardiol a reference book on “Engineering Applications of the Modulated Scatterer Technique” and is holder of numerous patents covering various probe array arrangements for microwave sensing and imaging systems, such as the first microwave camera for biomedical applications, Best Paper Awarded at the 1983 European Microwave conference. In 1986, Professor Bolomey founded the Microwave Vision Company SATIMO while also involved in industrial applications of microwave heating and material processing, as well as in High Power Microwave metrology. His recent research was targeting rapid probe array SAR measurements and load-modulated scattering antennas with related RFID sensing applications, as visiting Professor at UPC Barcelona. He contributed as member of several Scientific Advisory Boards of European Institutions and startup companies.

Professor Bolomey has received several awards, including the Blondel Medal of the Société des Electriciens et des Electroniciens, the Général Ferrié Award of the French Academy of Sciences, the Medal of the French URSI Chapter and the Schlumberger Stitching Fund Award for his contribution to inverse scattering techniques in microwave imagery. He has received the 2001 AMTA Distinguished Achievement Award for his pioneering activity in the field of modulated probe arrays, and was elected Edmond S. Gillespie Fellow in 2007. He is Fellow of the IEEE and was Distinguished Lecturer of the IEEE Antenna and Propagation Society from 2010 to 2013. He has received the 2015 Joseph F. Keithley Award from the IEEE Instrumentation and Measurement Society for his pioneering contributions to efficient probe array technology for fast electromagnetic near-field techniques and microwave imagery, and the 2017 Antenna Award of the European Association for Antennas and Propagation.