This study deals with the design and calibration of the first mode-stirred reverberation chamber (RC) in the 60-GHz-band adapted for in vivo bioelectromagnetic studies. In addition to the interface for electromagnetic and thermal dosimetry, the interfaces for lighting and ventilation were integrated into the RC walls while preserving acceptable shielding. The RC with mechanical and electronic steering capabilities is characterized in the 55-65 GHz range. To this end, murine skin-equivalent phantoms of realistic shape were designed and fabricated. Their complex permittivity is within ±12% of the target value of murine skin (6.19-j5.81 at 60 GHz). The quality factor of the RC loaded with an animal cage, bedding litter, and five murine phantoms was found to be 1.2 × 104 . The losses inside the RC were analyzed, and it was demonstrated that the main sources of the power dissipation were the phantoms and mice cage. The input power required to reach the average incident power density of 1 and 5 mW/cm2 was found to be 0.23 and 1.14 W, respectively. Surface heating of the mice models was measured in the infrared (IR) range using a specifically designed interface, transparent at IR and opaque at millimeter waves (mmW). Experimental results were compared with an analytical solution of the heat transfer equation and to full-wave computations. Analytical and numerical results were in very good agreement with measurements (the relative deviation after 90 min of exposure was within 4.2%). Finally, a parametric study was performed to assess the impact of the thermophysical parameters on the resulting heating. Bioelectromagnetics. 2020;41:121-135. © 2020 Bioelectromagnetics Society.

中文翻译：

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毫米波混响室中使用小鼠幻影进行曝光评估。

这项研究涉及在60 GHz频段内用于体内生物电磁研究的第一个模式搅拌混响室（RC）的设计和校准。除了用于电磁和热剂量测定的接口外，用于照明和通风的接口还集成到RC壁中，同时保留了可接受的屏蔽。具有机械和电子转向功能的RC的特点是在55-65 GHz范围内。为此，设计和制造了具有逼真的形状的小鼠皮肤等效体模。它们的复介电常数在鼠皮目标值（60 GHz时为6.19-j5.81）的±12％之内。发现装有动物笼子，被褥垫料和五个小鼠体模的钢筋混凝土的质量因子为1.2×104。分析了钢筋混凝土内部的损失，事实证明，功耗的主要来源是幻影和老鼠笼。发现达到平均入射功率密度1和5 mW / cm2所需的输入功率分别为0.23和1.14W。使用专门设计的界面在红外（IR）范围内测量小鼠模型的表面加热，该界面在IR透明，在毫米波（mmW）不透明。将实验结果与传热方程的解析解以及全波计算进行了比较。分析和数值结果与测量值非常吻合（暴露90分钟后的相对偏差在4.2％以内）。最后，进行了参数研究，以评估热物理参数对最终加热的影响。生物电磁学。2020; 41：121-135。