Workshop on Microwave and Millimetre-Wave Characterization of Dielectric Sheets


The aim of this Workshop is to present state-of-the-art and novel achievements in microwave and millimetre-wave characterization of dielectric sheets in the 1-110 GHz range with various resonant methods. At first, the efforts on benchmarking currently available material characterization methods, as recently undertaken by the international scientific and industrial community associated within the iNEMI 5G/mmWave Materials Assessment and Characterization project Consortium, will be addressed. The aim of the project was to identify advantages and limitations of the selected methods, determine possible gaps for extending these methods to 5G/mmWave frequencies, as well as to develop reliable reference standard materials for set-up and calibration. The measurement results obtained with such resonant methods as split-post dielectric resonators (SPDRs), Fabry-Perot open resonators (FPORs), split cavity resonators (SCR), and balanced-type circular-disk resonators (BCDR) will be presented and the project impact will be discussed.

In a subsequent part of the Workshop, the attention will be paid to measurement techniques based on SPDRs and FPORs addressing their features, advantages and limitations as well as practical measurement aspects. Point-wise measurements with SPDRs will be discussed together with surface imaging of the complex permittivity, run with a fully-automated 2D SPDR scanner. In case of the FPOR, two geometries will be presented, namely, double-concave and plano-concave, pointing out major differences between them in terms of the measurable types of the samples. Error and uncertainty budgets of both SPDRs and FPORs will also be discussed in details. In particular, it will be shown how the thickness and Q-factor uncertainties affect dielectric constant and loss tangent uncertainties, respectively.

Lectures will be supported with hands-on training, giving the opportunity of gaining practical insight into material characterization with SPDRs and FPORs as given directly by their vendors and developers.

Workshop Agenda


Introduction to the Workshop


Overview of the iNEMI 5G/mmWave Materials Assessment and Characterization project


Michael J. Hill
Assembly and Test Technology Development, Intel Corporation, Chandler, Arizona, USA


Material characterisation with split-post dielectric resonators in 1-15 GHz frequency range


Marzena Olszewska-Placha

QWED Sp. z o.o.


Material characterisation with Fabry-Perot open resonators in 20-110 GHz in frequency range


Bartlomiej Salski

Warsaw University of Technology

Institute of Radioelectronics and Multimedia Technology


Coffee break


Hands-on session:  Split-post dielectric resonators


Marzena Olszewska-Placha

QWED Sp. z o.o.


Coffee break


Hands-on session: Fabry-Perot open resonators


Bartlomiej Salski

Warsaw University of Technology

Institute of Radioelectronics and Multimedia Technology


Questions & concluding remarks


Dr. Marzena Olszewska-Placha is QWED ( Research Engineer since 2010 and since 2021 its Vice-President for Research and Development. She received the B.Sc., M.Sc, and Ph.D. (2014) degrees in the fields of waveguide filters, double reflector antennas, and graphene-based composite absorbing panels, from the Warsaw University of Technology (WUT). She participated in several research and industrial projects concerned with modelling and applications of graphene composites and metamaterials at GHz and THz frequencies, antennas for SATCOM applications, microwave treatment of bituminous surfaces, and materials characterization techniques. She is a member of IEEE. She is author of 11 journal articles and 30 conference presentations with over 210 citations, 3 book chapters and inventor of one patent (on microwave absorbers).

Prof. Bartlomiej Salski received the Ph.D. and D.Sc. degree in microwave engineering from the Warsaw University of Technology (WUT), Warsaw, Poland, in 2010 and 2015, respectively. He has been a University Professor at WUT since 2018. He is one of the founders and CEO of the EMArges company, which specializes in microwave characterization of materials and developed their flagship product, namely, Fabry-Perot open resonator. He is one of the founders and CEO of the Microwave and Radiolocation Foundation MIKON organizing international conferences in Poland and neighboring countries.

In 2015-2018 period, he was a recipient of a Scholarship for the Outstanding Young Scientists of the Ministry of Science and Higher Education. He received the Award of the 4th Department of the Polish Academy of Sciences in 2016 and several awards granted by the Rector of WUT for scientific, academic and organizational achievements. His research interests include electromagnetic modelling and microwave characterization of materials. He is the author of over 65 papers in peer reviewed journals and well over 100 conference papers with over 850 citations according to Google Scholar. He is a member of IEEE.

Dr. Michael J. Hill is a Principal Engineer at Intel Corporation in Chandler, Arizona.  He has been with the Electrical Core Competency group since 2002.  His work includes the development of new tools and techniques to allow precise characterization of substrate electrical performance metrics spanning power delivery, highspeed I/O and RF applications.   Much of his recent work has focused on metrologies for characterizing high speed integrated voltage regulators.  In addition to his work in Power Delivery, Michael is also responsible for developing characterization methods for package material sets spanning DC to 110GHz, and methods for characterizing mmWave package integrated antennas.   Michael is a senior member of the IEEE, has authored more than 30 peer reviewed publications and holds 10 patents.  He received B.S., M.S. and Ph.D. degrees in Electrical Engineering from the University of Arizona.