To research the exposure impact of electromagnetic radiation from mobile phone antennas under the millimeter wave on the human head,a broadband millimeter wave 5G microstrip antenna array and a three-layer spherical human head model including the scalp layer,skull layer,and brain layer are established in COMSOL electromagnetic simulation software.For three different antenna input powers,the electromagnetic exposure levels of the antennas are analyzed through dosimetric simulation using the incident power density(Sinc)and absorbed power density(Sab)specified by the ICNIRP,with a focus on the distribution situation of temperature rise within the head model.The simulation results indicate that when the antenna input power is 23 dBm,the Sinc and Sab values do not meet the ICNIRP specified limits,suggesting that 18 dBm is a suitable choice for millimeter wave antennas.Among the three input powers,the Sab value calculated at 25 GHz is the highest,resulting in a surface temperature rise on the brain layer of up to 0.149℃,which is below the threshold for thermal damage to the human head.As the distance increases from 1 mm to 30 mm,the Sinc value significantly decreases,with a maximum reduction of 82.95%.
millimeter wave5G mobile phone antennabroadbandelectromagnetic exposuretemperature field distribution
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