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Antenna Design and SAR Analysis on Human Head Phantom Simulation for Future Clinical Applications.

Felipe Pablo PerezJoseph Paul BandeiraJorge J MorisakiSeshasai Vamsi Krishna PeddintiPaul SalamaJames RizkallaMaher E Rizkalla
Published in: Journal of biomedical science and engineering (2017)
RF-EMF exposure to the human head phantom was performed utilizing a Yagi-Uda antenna type possessing high gain (in the order of 10 dbs) at a frequency of 64 MHz and SAR of 0.6 W/Kg. In order to maximize the EM power transmission in one direction, directors were placed in front of the driven element and reflectors were placed behind the driven element. So as to strategically direct the EM field into the center of the brain tissue, while providing field linearity, our analysis considered the field distribution for one versus four antennas. Within the provided dimensions of a typical human brain, results of the Bioheat equation within COMSOL Multiphysics version 5.2a software demonstrated less than a 1 m˚K increase from the absorbed EM power.
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