التفاصيل البيبلوغرافية
| العنوان: |
Computation of Electromagnetic Fields in Assemblages of Biological Cells. Using a Modified Finite-Difference Time-Domain Scheme. |
| المؤلفون: |
See, Chan H.1 c.h.seeI@brad.ac.uk, Abd-Alhameed, Raed A.1 r.a.a.abd@brad.ac.uk, Excell, Peter S.1 p.s.excell@brad.ac.uk |
| المصدر: |
IEEE Transactions on Microwave Theory & Techniques. Sep2007, Vol. 55 Issue 9, p1986-1994. 9p. |
| مصطلحات موضوعية: |
ELECTROMAGNETIC fields, FREQUENCIES of oscillating systems, FINITE differences, BOUNDARY value problems, ELECTRIC fields, MAGNETIC fields, ELECTRIC oscillators, OPTICAL communications, PHYSICS instruments |
| مستخلص: |
When modeling objects that are small compared with the wavelength, e.g., biological cells at radio frequencies, the stan- dard finite-difference time-domain (FDTD) method requires ex- tremely small time-step sizes, which may lead to excessive computation times. The problem can be overcome by implementing a quasi-static approximate version of FDTD based on transferring the working frequency to a higher frequency and scaling back to the frequency of interest after the field has been computed. An approach to modeling and analysis of biological cells, incorporating a generic lumped-element membrane model, is presented here. Since the external medium of the biological cell is lossy material, a modified Berenger absorbing boundary condition is used to truncate the computation grid. Linear assemblages of cells are investigated and then Floquet periodic boundary conditions are imposed to imitate the effect of periodic replication of the assemblages. Thus, the analysis of a large structure of cells is made more computationally efficient than the modeling of the entire structure. The total fields of the simulated structures are shown to give reasonable and stable results at 900, 1800, and 2450 MHz. This method will facilitate deeper investigation of the phenomena in the interaction between electromagnetic fields and biological systems. [ABSTRACT FROM AUTHOR] |
|
Copyright of IEEE Transactions on Microwave Theory & Techniques is the property of IEEE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Business Source Index |
