Abstract
A computational hydrodynamics model consisting of a system of four coupled time-domain partial differential equations is applied to study the response of the cellular sodium ion channel to a microwave electric-field excitation. The model employs a dynamic conservation law formulation, which has not been previously applied to this problem. Results indicate that the cellular sodium ion channel exhibits an electrical nonlinearity at microwave frequencies, which generates an intermodulation spectrum when excited by an amplitude-modulated electric field. Intermodulation products having frequencies down to 50 MHz, and very likely well below 50 MHz, appear possible. This is a new nonthermal microwave interaction mechanism with living tissues that, if observable below 0.1 MHz, could enable the stimulation of excitable biological tissues, and thereby have significant implications for human health and safety.
Original language | English (US) |
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Pages (from-to) | 2040-2045 |
Number of pages | 6 |
Journal | IEEE Transactions on Microwave Theory and Techniques |
Volume | 52 |
Issue number | 8 II |
DOIs | |
State | Published - Aug 2004 |
Funding
Manuscript received July 8, 2003; revised February 13, 2004. This work was supported in part by the National Science Foundation under Grant DMS-0311263. N. S. Stoykov is with the Rehabilitation Institute of Chicago, Chicago, IL 60611 USA and also with the Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL 60611 USA (e-mail: [email protected]). J. W. Jerome is with the Department of Mathematics, Northwestern University, Evanston, IL 60208 USA. L. C. Pierce is with the Weinberg College of Arts and Sciences, Northwestern University, Evanston, IL 60208 USA. A. Taflove is with the Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL 60208 USA. Digital Object Identifier 10.1109/TMTT.2004.831924
Keywords
- Computational modeling
- Electromagnetic interactions
- Living cells
- Microwaves
- Nonlinearity
- Nonthermal
ASJC Scopus subject areas
- Radiation
- Condensed Matter Physics
- Electrical and Electronic Engineering