Naslov
Investigation of Absorbed Electromagnetic Energy at Digital Mobile Communications Frequencies

Autori
Ilijašević, Nataša

Vrsta, podvrsta i kategorija rada
Ocjenski radovi, magistarski rad

Fakultet
Fakultet elektrotehnike i računarstva

Mjesto
Zagreb

Datum
16.03

Godina
1999

Stranica
111

Mentor
Šimunić, Dina

Ključne riječi
mobile telephone; dosimetry; properties of tissue; SAR; numerical methods; measurements; GSM

Sažetak
There are some concerns about the health effects produced by the electromagnetic fields of mobile telephones. Safety limits have been proposed by standard setting organizations such as CENELEC and IRPA. For mobile telephones the Specific Absorption Rate (SAR) in the head of the user is quantity to be determined for the purpose of compliance. Electromagnetic calculation is a candidate for certification of mobile telephones with respect to the limits proposed for the SAR averaged over a certain weight of tissue (1g or 10g) and over a time interval (6 minutes). In this thesis, a study is presented of different parameters that determine the accuracy of the electromagnetic calculations. The Finite Difference Time Domain (FD-TD) method and Method of Moments (MoM) were used as modeling tools. The accuracy of the modeling method for the calculations of electromagnetic fields in simple configurations must be carefully investigated. A procedure is needed to verify the accuracy of the tools. Canonical cases can help for this verification. After the verification by using simple models, more complex models can be used. In addition to the calculations, measurements were made as well. In the case of real mobile telephones, it is necessary to investigate each particular model, because of the differences in their design and manufacturing characteristics.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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