Volume 4 Number 2 (Feb. 2009)
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JCP 2009 Vol.4(2): 168-175 ISSN: 1796-203X
doi: 10.4304/jcp.4.2.168-175

FDTD Simulation of a Mobile Phone Operating near a Metal Wall

Nuttaka Homsup1, Terapass Jariyanorawiss1, Wiroj Homsup2
1Faculty of Engineering, Kasetsart University, Thailand
2Royal Thai Air Force Academy, Bangkok, Thailand


Abstract—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 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 fields absorbing layer and was backed by a perfect electric conductor. An antenna model 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 ( △l ) as a varying 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 (6 < △l < 8 cm) and eye (6 < △l < 10 cm).

Index Terms—Finite-Difference Time-Domain (FDTD), Perfectly Matched Layer (PML), SAR, Metal Wall.

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Cite: Nuttaka Homsup, Terapass Jariyanorawiss, Wiroj Homsup, "FDTD Simulation of a Mobile Phone Operating near a Metal Wall," Journal of Computers vol. 4, no. 2, pp. 168-175, 2009.

General Information

ISSN: 1796-203X
Frequency: Monthly
Editor-in-Chief: Prof. Liansheng Tan
Executive Editor: Ms. Nina Lee
Abstracting/ Indexing: DBLP, EBSCO,  ProQuest, INSPEC, ULRICH's Periodicals Directory, WorldCat, CNKI,etc
E-mail: jcp@iap.org
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