Accurate Material Characterization over THz Frequency Range

#Terahertz #Days #IEEE

This presentation will begin with a general discussion on the current landscape of THz research and development.  In particular, the state-of-the-art of MHz-through-THz material characterization will be briefly reviewed. Subsequently, two groups of free-space THz measurement techniques will be described for accurate material characterization and parametric extraction in connection with frequency independent optical paths. Quasi-optical mirror and lens systems are studied and developed over THz range to achieve precision complex permittivity measurements of dielectric substrates, films, and materials. To achieve a wide plane wave zone for the center of four-parabolic-mirror systems, two corrugated horns are designed and fabricated for the measurement systems. The Gaussicity of the corrugated horn is larger than 97.4%. For the proposed multiple reflection model and direct wave model, a set of closed-form expressions of loss tangent are derived from transmission parameters of the measurement systems. The resolution and uncertainty of loss tangent are examined according to the working frequency, the thickness of wafer or substrate, the real part of relative permittivity, and the transmission measurement uncertainty. The complex permittivity of Rogers/Duroid series PCB substrates, which are commonly used at microwave frequencies, and silicon wafers are measured over THz ranges.

  Date and Time




  • Date: 28 Feb 2022
  • Time: 11:00 AM to 01:00 PM
  • All times are (GMT-05:00) US/Eastern
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  • Montreal, Quebec
  • Canada

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  • Co-sponsored by STARaCOM (Montreal)
  • Starts 27 December 2021 02:37 PM
  • Ends 08 February 2022 02:37 PM
  • All times are (GMT-05:00) US/Eastern
  • No Admission Charge


Ke Wu


Dr. Ke Wu is Endowed Industrial Research Chair in Future Wireless Technologies and Professor of Electrical Engineering at Polytechnique Montréal, where he is the Director of the Poly-Grames Research Center. He was the Canada Research Chair in RF and millimeter-wave engineering and the Founding Director of the Center for Radiofrequency Electronics Research of Quebec. He held/holds visiting/honorary professorships at various universities around the world. Dr. Wu has graduated over 74 Ph.D. and 95 M.Sc. Students. He has authored/co-authored over 1400 referred papers, and a number of books and book chapters and filed more than 50 patents. Dr. Wu was the general chair of the 2012 IEEE MTT-S International Microwave Symposium. He was the 2016 President of the IEEE Microwave Theory and Techniques Society (MTT-S). He also served as the inaugural North-American representative in the General Assembly of the European Microwave Association. He was the recipient of many awards and prizes including the inaugural IEEE MTT-S Outstanding Young Engineer Award, 2004 Fessenden Medal of the IEEE Canada, 2009 Thomas W. Eadie Medal from the Royal Society of Canada, Queen Elizabeth II Diamond Jubilee Medal, 2013 Award of Merit of Federation of Chinese Canadian Professionals, 2014 IEEE MTT-S Microwave Application Award, the 2014 Marie-Victorin Prize (Prix du Quebec), 2015 Prix d’Excellence en Recherche et Innovation of Polytechnique Montréal, 2015 IEEE Montreal Section Gold Medal of Achievement, 2019 IEEE MTT-S Microwave Prize, and 2021 EIC Julian C. Smith Medal. He was an IEEE MTT-S Distinguished Microwave Lecturer. Dr. Ke Wu is a Fellow of the IEEE, Canadian Academy of Engineering and Royal Society of Canada.

Address:Montreal, Quebec, Canada


10:45 AM - 10:55 AM:  Opening the workshop, Mansour Naslcheraghi, Chair of YP Montreal

10:55 AM - 11:05 AM:  Workshop and Speaker introduction by chair of Terahertz Days workshop Series, Dr. Gunes Karabulut Kurt

11:05 AM - 12:05 PM:  Talk by Prof. Ke Wu

12:05 PM - 12:45 PM:  Q & A session

This event is sponsored by STARaCOM