Chair of Electromagnetic Theory

Development of Novel Material Models of Technical and Biological Structures for Electromagnetic Field Simulations in mm- and sub-mm-Wave Range

Project title (German)
Entwicklung und Bewertung biologischer und technischer Materialmodelle für numerische Simulationen von Terahertz-Expositionen des menschlichen Körpers und von Fehleranalysen in Glas- und Carbon-Faser-Verbundstrukturen mit mm- und Sub-mm-Wellen

Project manager
Prof. Dr. Markus Clemens

Project member
Dr.-Ing. Oliver Spathmann

Project duration
2015 - 2017

mm- / sub-mm-wave range, electrical material parameters, human body, exposure-related heating, composite fiber materials, non-destructive testing, numerical computer simulations

Deutsche Forschungsgemeinschaft (DFG) under grant number CL143/12-1

Project description

The aim of the research project is to develop novel material models for technical and biological structures. These models, which are based on mixing methods, are intended to fill the gaps in literature on dielectric material parameters (permittivity and conductivity) in the mm and sub-mm wavebands (about 30 GHz - 10 THz). As part of this research project, the acquired material data are then to be used for numerical computer simulations. In order to demonstrate the wide range of applications of these material models and also to show the limitations of the approach, two very different topics are covered: First, the electromagnetic exposure of human body tissues in current and future applications working at THz frequencies (sub-mm waves) is to be calculated and the suitability of the novel material models is to be evaluated. Second, high-resolution models of composite fiber materials with and without defects are to be developed and then irradiated with mm and sub-mm field sources. In this way, the field modifications in front of and/or behind the material samples as well as in the samples themselves can be compared in order to identify the causes for the observed misdiagnoses in non-destructive material testing with imaging techniques.

Project-related publications

S. Runke, G. An, O. Spathmann, J. Streckert and M. Clemens, "Simulation of Nondestructive Testing Methods for the Detection of Composite Material Defects", 17th International IGTE Symposium on Numerical Field Calculation in Electrical Engineering (IGTE 2016), Graz, Austria, 18.-21.09.2016. Book of Abstracts, p. 11., Sep. 2016.
O. Spathmann, M. Zang, J. Streckert, V. Hansen, M. Saviz, T. Fiedler, K. Statnikov, U. Pfeiffer and M. Clemens, "Numerical Computation of Temperature Elevation in Human Skin Due to Electromagnetic Exposure in the THz Frequency Range", IEEE Transactions on Terahertz Science and Technology, vol. 5, no. 6, pp. 978 - 989, Nov. 2015.
O. Spathmann, M. Saviz, J. Streckert, M. Zang, V. Hansen and M. Clemens, "Numerical Verification of the Applicability of the Effective Medium Theory With Respect to Dielectric Material Properties", IEEE Transactions on Magnetics, vol. 51, no. 3, pp. 7204204, Mar. 2015.
M. Zang, V. Hansen, U. Pfeiffer, O. Spathmann, K. Statnikov, J. Streckert and M. Clemens, "Development and Application of Electromagnetic Field Excitation Models for Dosimetry Studies in the THz Range", Ninth International Conference on the Computation in Electromagnetics (CEM 2014), London, United Kingdom, 31.03.-01.04.2014. Two-page paper, Mar. 2014.
O. Spathmann, V. Hansen, M. Saviz, J. Streckert, M. Zang and M. Clemens, "Estimation of Dielectric Material Properties in THz-Frequency Range Using Effective Medium Theory", EMC Europe 2013, Brugge, Belgium, 02.-06.09.2013, vol. Full paper appeared in IEEEXplore, Conf. Proceedings, pp. 154-159, Sep. 2013.
K. Statnikov, R. Al Hadi, M. Clemens, V. Hansen, O. Spathmann, J. Streckert, M. Zang and U. Pfeiffer, "Methods for Determining the Exposure to THz Radiation Utilizing CMOS-Based Detectors", International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2013), September 2013, Mainz, Germany, Sep. 2013.
M. Saviz, L. Mogouon Toko, O. Spathmann, J. Streckert, V. Hansen, M. Clemens and R. Faraji-Dana, "A New Open-Source Toolbox for Estimating the Electrical Properties of Biological Tissues in the Terahertz Frequency band", Journal of Infrared, Millimeter, and Terahertz Waves, vol. 34, pp. 529 - 538, Jul. 2013.

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