Dragan Poljak

Dragan Poljak received his PhD in el. Eng. in 1996 from the Univ. of Split, Croatia. He is the Full Prof. at Dept. of Electron. and Computing, Univ. of Split. His research interests are oriented to computational electromagnetics (electromagn. compatibility, bioelectromagnetics and plasma physics). To date Prof. Poljak has published more than 160 journ. and 250 conf. papers, and authored some books, e.g. two by Wiley, New Jersey and one by Elsevier, St Louis. He is a Senior member of IEEE, a member of Editorial Board of Eng. Anal. with Boundary Elements, Math. Problems in Eng. And IET Sci. Measur. & Techn. He was awarded by several prizes for his research achievements, such as National Prize for Science (2004), Croatian sect. of IEEE annual Award (2016), Technical Achievement Award of the IEEE EMC Society (2019) and George Green Medal from University of Mississippi (2021). From May 2013 to June 2021 Prof. Poljak was a member of the board of the Croatian Science Foundation. He was involved in ITER physics EUROfusion collaboration and he is currently involved in DONES EUROfusion collaboration and in Croatian center for excellence in research for tech. sciences. He is active in few Working Groups of IEEE/Internat. Committee on Electromagnetic Safety (ICES) Tech. Comm. 95 SC6 EMF Dosimetry Modeling.

Update: “Efficient Dosimetry Procedures in GHz frequency range for 5G systems“
Abstract: Human exposure to mobile communications systems of fifth generation (5G) may lead to local temperature elevation at the body surface. According to IEEE 2019 and ICNIRP 2020 guidelines, this surface heating is quantified by absorbed power density (S_ab) above transition frequency of 6GHz, while for the frequencies below 6GHz well-known quantity specific absorption rate (SAR) is used. Also, transmitted power density (TPD), an alternative dosimetric quantity and metric providing an estimation of skin temperature elevation for human exposure to EM fields at GHz frequency range is used.

The presentation first starts with analytical assessment of S_ab  and TPD for the case of Hertz dipole radiating in the presence of a lossy half-space. It will be followed by an analytical/numerical assessment of S_ab in the homogeneous planar model of the human tissue due to radiation of horizontal dipole antenna of finite length in GHz frequency range. Next topic of interest is the calculation of incident power density (IPD) and related temperature increase in multilayer tissue model using different numerical methods based on the paper prepared by IEEE ICES working group  and recently published in IEEE Access (November 2021 Issue).

Finally, stochastic-deterministic electromagnetic-thermal dosimetry in lower portion of GHz frequency range for anatomically based realistic multilayered model of the human head exposed to  radiation from 5G communication systems will be presented. This part of the talk is based on the recently published paper in IEEE TEMC Special Issue on Progress in Environmental Electromagnetic Safety and Bimedical EMC (October 2021 Issue).

Some concluding remarks and guidelines for future work will be outlined.