人体皮肤模型 从15 GHz到110 GHz
Andreas Christ1, Adrian Aeschbacher2, Bernadetta Tarigan3
1Foundation for Research on Information Technologies in Society (IT'IS), Zurich, Zurich, Switzerland.
Bioelectromagnetics
|October 4, 2025
概括
这项研究开发了人类皮肤的新宏观介电模型,以准确预测高达110 GHz的电磁场吸收. 该模型有助于对无线设备进行对吸收功率密度限制的保守性合规性测试.
科学领域:
- 电磁学 电磁学 电磁学 电磁学
- 生物物理学的生物物理.
- 材料科学 材料科学 材料科学
背景情况:
- 准确的人体皮肤模型对于无线设备对吸收功率密度 (APD) 限制的合规性测试至关重要.
- 角层 (SC) 层显著影响皮肤的阻抗匹配和吸收特性.
- 现有的模型可能无法完全捕捉皮肤的介电性质在广泛的频率范围内.
研究的目的:
- 为人类皮肤开发一个单一的宏观介电模型,可以保守地复制高达110 GHz的电磁场吸收.
- 为5G和6G频段的无线设备提供可靠的合规测试模型.
- 为了提高吸收功率密度 (APD) 估计的准确性.
主要方法:
- 使用开放波导探头测量了人类志愿者的皮肤反射系数,从15到43 GHz,补充了现有的数据,直至110 GHz.
- 在不同角层 (SC) 厚度的各种身体区域统计分析了反射系数数据.
- 根据测量数据和不确定性分析,衍生出分散式双层介电模型.
主要成果:
- 以dB表示的反射系数在SC薄的区域中遵循正常分布,使得保守的模型开发成为可能.
- 由于机械应力依赖的SC厚度,在厚厚的SC区域 (例如手掌) 观察到反射系数的非正常分布.
- 衍生模型准确地代表了皮肤的吸收和反射特性,具有可量化的不确定性.
结论:
- 开发的宏观介电皮肤模型准确地表示了高达110 GHz的电磁吸收.
- 这些模型为证明无线设备符合5G和6G的APD限制提供了保守的基础.
- 了解SC变异性是人类皮肤精确介电模型的关键.
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