Numerička studija izračuna sigurnosne razine zračenja Bluetooth slušalice

master's thesis

• Title (english): Numerical Study of Bluetooth Headset Radiation Safety Level Calculation
• Author: Tamara Šeša
• Mentor: Dina Šimunić (mentor)
• Committee member: Dina Šimunić (predsjednik povjerenstva)
• Committee member: Krešimir Malarić (član povjerenstva)
• Committee member: Radovan Zentner (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2016-09-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing

Abstract

Razvojem industrije mobilnih komunikacija raste i svjesnost o štetnosti neionizirajućeg zračenja i njegovom utjecaju na zdravlje ljudi. Prvi dio rada pokriva teoretsku osnovu za razumijevanje problematike i zakonske regulative, a u drugom dijelu su dani konkretni rezultati simulacije dobiveni pomoću programskog paketa Sim4Life. Posebna pozornost u teoretskom dijelu rada posvećena je SAR-u, glavnoj mjeri za određivanje utjecaja neionizirajućeg zračenja na ljudsko tijelo, koji opisuje kolika je apsorbirana snaga u mediju s gubitcima po jedinici mase. Bluetooth slušalica je modelirana poluvalnim dipolom i zajedno sa SAM fantomom simulirana je u različitim okruženjima: slobodnom prostoru, osobnom automobilu i uredu. Osim okruženja, mijenjan je i relativni položaj slušalice u odnosu na glavu. Odabrani su položaji slušalice od 60° i 30°. Pokazano je kako su rezultati SAR-a u sva tri okruženja manji (bolji) za položaj slušalice pod kutem od 60°, a najbolji u osobnom automobilu zbog prisutnosti dielektričnih materijala koji apsorbiraju EM valove. Valja naglasiti kako su sve vrijednosti SAR-a unutar zakonskih ograničenja.

Abstract (english)

The development of mobile communication industries gave rise to awareness of the harmful effects of non-ionizing radiation on human health. The first part of this study covers the theoretical basis for understanding this subject and its legal regulations, while the second part gives results of simulations run in the Sim4Life simulation programme package. In the theoretical part of the study, special attention was given to SAR, the main measurement for the effect of non-ionizing radiation on the human body. SAR describes the amount of power absorbed by a given medium, per unit of mass. A Bluetooth device was modelled by a half-wavelength dipole and simulated in different environments with the SAM phantom: open space, car and office. Also, multiple simulations were run in a single environment with changes to the relative angle of the device in respect to the position of the head. The angle of the device was set to be either 60° or 30°. Simulation results show that SAR values in all three environments favor the 60° angle of the device relative to the head, with the lowest SAR scores in the car, caused by the dielectric materials of the car that absorb most of the EM waves. It is worth mentioning that all SAR values in all simulations are within legal regulations.

• Keywords: Bluetooth slušalica; poluvalni dipol; SAR; FDTD; Sim4Life
• Keywords (english): Bluetooth headset; half-wavelength dipole; SAR; FDTD; Sim4Life
• Language: croatian
• URN:NBN: urn:nbn:hr:168:301289
• Study programme: Title: Information and Communication Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka informacijske i komunikacijske tehnologije (magistar/magistra inženjer/inženjerka informacijske i komunikacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2018-02-06 12:16:06