Trefftz Analysis For Temperature Rise On Human
Skin Exposed To Electromagnetic Waves
Author(s)
Y. Hirayama & E. Kita
Abstract
This paper describes the application of Trefftz method to the temperature rise in
a human skin exposed to a radiation from a cellular phone. A governing equation
is given as Poisson equation. An inhomogeneous term of the equation is approximated
with a polynomial function in Cartesian coordinates. The use of the approximated
term transforms the original boundary-value problem to that governed with
a homogeneous differential equation. The transformed problem can be solved by
the traditional Trefftz formulation. Firstly, the present method is applied to a simple
numerical example in order to confirm the formulation. The temperature rise
in a skin exposed to a radiation is considered as a second example.
Keywords: Trefftz method, poisson equation, polynomial function.
1 Introduction
There has been an increasing public concern regarding the possible health effects
of human exposure to an electromagnetic radiation. In Japan, there are four cellular
phone carrier companies; NTT Docomo, au, Softbank (vodafone) and Willcome.
They provide different types of cellular phone services. NTT Docomo, au and Softbank
(vodafone) provides Code Division Multiple Access (CDMA)-type phones
and Willcome Personal Handy-phone System (PHS)-type ones. The CDMA-type
phones are so-called 3G-cellular phones, which are used widely around the world.
The PHS-type phones operate in the 1880–1930 MHz frequency band, which are
used mainly in Japan, China, Taiwan and some other Asian countries. Since carrier
companies operate different services, their health effects are also dissimilar. In
this paper, we will focus on the temperature rise in a human skin exposed to the
radiation. The hazardous electromagnetic field levels can be quantified analyzing
the thermal response of the human body exposed to the radiation [1, 2].
Keywords
Trefftz method, poisson equation, polynomial function.
Related Book
Other papers in this volume
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