Title
Analiza prodrlog elektromagnetskog polja mobilnog telefona korišćenjem numeričkog modela dečije glave za različite mikrotalasne podopsege
Creator
Stanković, Vladimir B. 1978-
Copyright date
2017
Object Links
Select license
Autorstvo-Nekomercijalno-Bez prerade 3.0 Srbija (CC BY-NC-ND 3.0)
License description
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Language
Serbian
Cobiss-ID
Theses Type
Doktorska disertacija
description
Datum odbrane: 20.03.2018.
Other responsibilities
mentor
Marković, Vera 1956-
član komisije
Dončov, Nebojša
član komisije
Cvetković, Nenad
član komisije
Krstić, Dejan
član komisije
Jovanović, Jovic
Academic Expertise
Tehničko-tehnološke nauke
University
Univerzitet u Nišu
Faculty
Elektronski fakultet
Group
Katedra za telekomunikacije
Alternative title
Analysis of penetrating electromagnetic field from mobile phones using a numerical model of the child head in different microwave ranges
Publisher
[V. B. Stanković]
Format
211 listova
description
Bibliografija: listovi 203-211
description
Telecommunications
Abstract (en)
The research work presented here was aimed at obtaining the new
results related to the calculation of penetrated electromagnetic field
from a mobile phone and its spatial distribution inside a child’s head.
Several numerical models were developed for the purpose of
investigating the effects of mobile phone radiation. A comprehensive
3D numerical model was developed, which corresponds to the
anatomical and morphological properties of a seven years-old child
head by size and shape. An adult head model was created for the
purpose of examining the different effects of electromagnetic
radiation on children and adults. Also, in line with the trend of
increased use of mobile phones for internet access and
viewing/reading of the content on the device display, a child eye
model with appropriate anatomical and morphological characteristics
was developed to match such use.
The source of electromagnetic radiation has been created to match
the shape of a contemporary smart phone, and it contains the housing
with a display and the antenna. The research involved a simulation of
operational conditions of the phone at several different frequencies –
both at currently used and at upcoming 5G network frequencies.
For assumed level of device output power, high values of electric
field intensity and specific absorption rate (SAR), exceeding the
allowed reference levels and base limitations were found in some
tissues/organs inside the child head model. Higher than allowed
electric field and SAR levels were also found for millimetre wave
frequency ranges but they are concentrated in narrow layers near the
very surface of the model, whereby the exceeding SAR level is even
more noticeable.
Higher values of electric field intensity and SAR are present in the
child head model to a greater extent compared to the adult head
model, due to anatomical and geometrical differences between child
and adult head models. The research also shows that the
morphological properties of children’s tissues and organs influence
the increase of SAR values.
Authors Key words
Elektromagnetsko zračenje, elektromagnetsko polje, numerički
model, mikrotalasi, mobilni telefon, biološko tkivo, SAR
Authors Key words
Electromagnetic radiation, electromagnetic field, numerical model,
microwaves, mobile phone, biological tissue, SAR
Classification
621.395+537.531]:576.3+519.6(043.3)
Subject
T 191
Type
Elektronska teza
Abstract (en)
The research work presented here was aimed at obtaining the new
results related to the calculation of penetrated electromagnetic field
from a mobile phone and its spatial distribution inside a child’s head.
Several numerical models were developed for the purpose of
investigating the effects of mobile phone radiation. A comprehensive
3D numerical model was developed, which corresponds to the
anatomical and morphological properties of a seven years-old child
head by size and shape. An adult head model was created for the
purpose of examining the different effects of electromagnetic
radiation on children and adults. Also, in line with the trend of
increased use of mobile phones for internet access and
viewing/reading of the content on the device display, a child eye
model with appropriate anatomical and morphological characteristics
was developed to match such use.
The source of electromagnetic radiation has been created to match
the shape of a contemporary smart phone, and it contains the housing
with a display and the antenna. The research involved a simulation of
operational conditions of the phone at several different frequencies –
both at currently used and at upcoming 5G network frequencies.
For assumed level of device output power, high values of electric
field intensity and specific absorption rate (SAR), exceeding the
allowed reference levels and base limitations were found in some
tissues/organs inside the child head model. Higher than allowed
electric field and SAR levels were also found for millimetre wave
frequency ranges but they are concentrated in narrow layers near the
very surface of the model, whereby the exceeding SAR level is even
more noticeable.
Higher values of electric field intensity and SAR are present in the
child head model to a greater extent compared to the adult head
model, due to anatomical and geometrical differences between child
and adult head models. The research also shows that the
morphological properties of children’s tissues and organs influence
the increase of SAR values.
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