Abstract
Transverse electromagnetic (TEM) cells can be used for exposing biological culture specimens to electromagnetic fields and observing possible anomalous effects. The uniformity of field exposure is critical to quantifying the biological response versus the electromagnetic dose. Standing waves and other electromagnetic field nonuniformities can cause nonuniform exposure. This paper reports the results of high-resolution three-dimensional finite-difference time-domain (FDTD) simulations of a complete TEM cell designed for operation at 837 MHz. Several different cases were studied in which the number of culture dishes, the depth of the culture liquid, and the orientation of the culture dishes were varied. Further, the effect of the culture-dish glass bottom thickness and the meniscus of the liquid medium were examined. The FDTD results show that there is a significant nonuniform field and specific absorption rate (SAR) distribution within the culture medium for each case examined. Hence, biological dose-response experiments using the TEM cell should account for the possibility of strong localized SAR peaking in the culture media to provide useful data in setting exposure standards for wireless communications.
Original language | English (US) |
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Pages (from-to) | 1067-1076 |
Number of pages | 10 |
Journal | IEEE Transactions on Biomedical Engineering |
Volume | 45 |
Issue number | 8 |
DOIs | |
State | Published - Aug 1998 |
Funding
Manuscript received June 6, 1997; revised February 10, 1998. This work was supported in part by Wireless Technology Research L.L.C. and Cray Research, Inc. The work of S. C. Hagness was supported in part by an NSF Graduate Fellowship. Asterisk indicates corresponding author. *M. Popović is with the Department of Electrical and Computer Engineering, McCormick School of Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 USA (e-mail: [email protected]).
Keywords
- Absorbing media
- Biological cells
- Biological effects of electromagnetic radiation
- Biological system modeling
- Dosimetry
- Electromagnetic propagation in absorbing media
- FDTD methods
- Waveguides
ASJC Scopus subject areas
- Biomedical Engineering