Shielding performance of a mobile phone’s radiation with a good conductor

Document Type : Original Article

Authors

Dept. of Electrical and Electronics Eng., Selcuk University, Konya, Turkey.

Abstract

Abstract:
In this study, shielding of radiation from a mobile phone towards user is analyzed. It
includes both simulations of shielding of EM wave radiated from mobile phone and
practically shielding measurements. Copper plate as a good conductor is utilized for
shielding. Since the radiation mostly penetrates via user’s ear, the shield is placed on the
earpiece of the mobile phone. For simulations, a Finite Difference Time Domain
(FDTD) program has been developed in Matlab programming language. FDTD
simulations have been carried out in 2 dimensions with first order Mur’s ABC.
Shielding effectiveness (SE) values have been computed by using electric field values
which the user is exposed to. Also electromagnetic radiation graphics with color code
and field patterns can be showed as simulation outputs. Experimental measurements are
carried out in an ordinary room. A radiation-meter and a mobile phone with internal
antenna are used for these measurements. The results obtained from both simulations
and measurements are compared.

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