ANALYSIS OF METAMATERIAL ATTACHMENT FOR EM ABSORPTION IN HUMAN HEAD

The reducing specific absorption rate (SAR) with metamaterials attachment is investigated in this paper. The finite-difference time-domain method with lossy-Drude model is adopted in this analysis. The technique of SAR reduction is discussed and the effects of attaching location, distance, and size of metamaterials, perfect electric conductor (PEC), and materials on the SAR reduction are investigated. Metamaterials have achieved a 41.47% reduction of the initial SAR value for the case of 1 gm SAR. These results suggest a guideline to choose various types of metamaterials with the maximum SAR reducing effect for a phone model. Vpliv dodatka metamateriala na absorpcijo EM valovanja v cloveski glavi Kjucne besede: antena, model cloveske glave, lossy-Drude model, metamateriali, specificna absorbcijska stopnja (SAR) Izvlecek: v clanku opisemo zmanjsanje parametra SAR ( specificna absorbcijska stopnja ) z dodatkom metamateriala. Analizo smo opravili z modelom Drude in uporabo koncnih diferenc v casovni domeni. Opisana je tehnika zmanjsanja parametra SAR , raziskani so vpliv lokacije, oddaljenosti in velikosti metamaterialov ter vpliv popolnega elektricnega prevodnika (PEC) in vrste metamaterialov na zmanjsanje SAR. Z uporabo metamaterialov smo dosegli 41,47 % zmanjsanje zacetne vrednosti SAR, ki je bila 1gm SAR. Ti rezultati pomenijo neko vrsto smernic za izbiro materialov za mobilne telefone, ki najbolj zmanjsujejo parameter SAR.