Issue: Vojnosanit Pregl 2016; Vol. 73 (No. 6)
Modelling and assessment of the electric field strength caused by mobile phone to the human head
Authors:
Raimondas Buckus*, Birute Strukcinskiene†, Juozas Raistenskis*, Rimantas Stukas*
Background/Aim. Electromagnetic field exposure is the oneof the most important physical agents that actively affects live
organisms and environment. Active use of mobile phones influences
the increase of electromagnetic field radiation. The
aim of the study was to measure and assess the electric field
strength caused by mobile phones to the human head. Methods.
In this paper the software “COMSOL Multiphysics” was
used to establish the electric field strength created by mobile
phones around the head. Results. The second generation
(2G) Global System for Mobile (GSM) phones that operate in
the frequency band of 900 MHz and reach the power of 2 W
have a stronger electric field than (2G) GSM mobile phones
that operate in the higher frequency band of 1,800 MHz and
reach the power up to 1 W during conversation. The third generation
of (3G) UMTS smart phones that effectively use high
(2,100 MHz) radio frequency band emit the smallest electric
field strength values during conversation. The highest electric
field strength created by mobile phones is around the ear, i.e.
the mobile phone location. The strength of mobile phone electric
field on the phantom head decreases exponentially while
moving sidewards from the center of the effect zone (the ear),
and constitutes 1–12% of the artificial head’s surface. Conclusion.
The highest electric field strength values of mobile
phones are associated with their higher power, bigger specific
energy absorption rate (SAR) and lower frequency of mobile
phone. The stronger electric field emitted by the more powerful
mobile phones takes a higher percentage of the head surface.
The highest electric field strength created by mobile
phones is distributed over the user's ear.
