人体组织等效电学参数的计算与应用

摘要

Maxwell-Gamett theory on effective electromagnetic parameters of composite materials was used to establish electromagnetic model of human tissue. Conductivity and dielectric parameters of the model were considered to calculate absorption and reflection characteristics of human body when it exposured to different frequencies electromagnetic fields. The results show that absorption and reflection characteristics of human tissue exposure to different frequencies electromagnetic waves depend on the electromagnetic parameters of human tissue and the characteristics of electromagnetic field itself. The body's specific absorption rate of electromagnetic fields was calculated. The study laid a theoretical foundation to determine exposure limits of health standard on electromagnetic radiation.%Maxwell-Garnett复相体系等效介电常数理论模型在理论上解释了众多的复相体系的介电特性,利用该理论建立了人体组织的等效电学模型,综合考虑人体组织的电导率和介电率,计算了人体对于不同频率电磁波的吸收和反射等特性.计算结果表明,人体组织对于不同频率电磁波的吸收比率依赖于人体组织的电学参数以及电磁波本身的特性.研究结果为电磁辐射健康标准限值的制定提供了理论基础.