A procedure to develop realistic numerical models of cellular phones for an accurate evaluation of SAR distribution in the human head

Stetano Pisa, Marta Cavagnaro, Vanni Lopresto, Emanuele Piuzzi, Giorgio A. Lovisolo, Paolo Bernardi

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21 Citations (Scopus)


This paper presents an optimization procedure based on the minimization of a cost function and devoted to implement realistic numerical models of cellular phones to be used inside a finite-difference time-domain code. The adopted cost function depends on geometrical and electrical parameters of the phone and quantifies the accuracy of the model by comparing the simulation results with experimental measurements of the near electric and magnetic fields in free space, and of the specific absorption rate (SAR) in a homogeneous cubic phantom. As an example of the application of the proposed optimization method, a numerical model of a commercial phone has been implemented and the power deposition in an anatomically based model of the human head has been computed for various phone positions. The obtained results show that the use of inaccurate phone models can lead to large errors on local SAR evaluation. © 2005 IEEE.
Original languageEnglish
Pages (from-to)1256 - 1264
Number of pages9
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number4 I
Publication statusPublished - Apr 2005
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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