ABSTRACT In this paper, effects of a brain tumor located in a dispersive human head model on specific absorption rate (SAR) and temperature rise distributions due to different types of RF sources at 4G and 5G cellular frequencies are investigated with the use of a multiphysics model. This multiphysics model analyzes the dispersive human head with the brain tumor and provides the SAR and temperature rise distributions in the head due to the RF source operated at 4G and 5G cellular frequencies in a single finite-difference time-domain simulation. An adjacent antenna operated at 4G and 5G cellular frequencies to the human head is considered as the RF source for near-field exposure, while a plane wave field radiated by base stations operated at 4G and 5G cellular frequencies is considered as the RF source for far-field exposure. Numerical results show that the brain tumor in the head slightly affects the SAR and temperature rise distributions due to different RF sources at 4G and 5G cellular frequencies.

中文翻译：

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由于 4G 和 5G 频率的射频源，分散的人头部中的脑肿瘤对 SAR 和温升分布的影响

摘要 在本文中，使用多物理场模型研究了位于分散性人体头部模型中的脑肿瘤对 4G 和 5G 蜂窝频率下不同类型射频源导致的比吸收率 (SAR) 和温升分布的影响. 该多物理场模型分析了具有脑肿瘤的弥散性人类头部，并在单个有限差分时域仿真中提供了由于在 4G 和 5G 蜂窝频率下运行的射频源而导致的头部 SAR 和温升分布。工作在 4G 和 5G 蜂窝频率的与人体头部相邻的天线被认为是近场暴露的射频源，而工作在 4G 和 5G 蜂窝频率的基站辐射的平面波场被认为是远场的射频源。 - 场曝光。