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Computer Science and Information Engineering, World Congress on (2009)
Los Angeles, California USA
Mar. 31, 2009 to Apr. 2, 2009
ISBN: 978-0-7695-3507-4
pp: 364-368
The Finite-Difference Time-Domain (FDTD) is the most often used method for evaluating of electromagnetic fields in human tissue. This paper presents a study of heating effects resulted from using a mobile phone operating near a metal wall. The unsplit-field finite-difference time-domain (FDTD)simulation scheme was used in the simulation. The simulated physical domain consists of a dipole antenna, a high-resolution human head model and a metal wall enclosed by the Perfectly Matched Layer(PML). In this case, the PML acts as an electromagnetic field absorbing layer and was backed by a perfect electric conductor. An antenna operated at 900 MHz and 1.8 GHz was used in the simulation.The Specific Absorption Rate (SAR) was computed and averaged on a tissue mass of one gram and ten grams, SAR 1-g and SAR 10-g, respectively. The main purpose of the present research is to compare SAR resulted from a mobile phone operated at two different frequencies (900 MHz and 1.8 GHz) in the close proximity to a metal wall. Also, average powers(Pavg) absorbed in various human tissues were computed with a distance between an antenna and a metal wall ( Δl ) as a varied parameter. Results from the simulation show that the computed SAR 1-g and SAR 10-g values are not exceed the limitation values established by various standard institutes. Also, the average power absorbed in all tissue models with a mobile phone operated at 1.8 GHz has an average power lower than those operated at 900 MHz except for the average power absorbed in muscle (7
Finite-Difference Time-Domain(FDTD), PML, SAR

T. Jariyanorawiss, N. Homsup and W. Homsup, "Unsplit-Field FDTD Simulation of a Mobile Phone Operating Near a Metal Wall," 2009 WRI World Congress on Computer Science and Information Engineering, CSIE(CSIE), Los Angeles, CA, 2009, pp. 364-368.
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