An all dielectric metamaterial sensor with smooth spectral lines resonance characteristics over a large frequency range is demonstrated and verified. The average transmittance and reflectance of the metamaterial sample are 0.734 and 0.201 in the frequency range of 4–30 THz. The effects of three important factors on the thermal conductivity of the outdoor clothing fabric samples are measured by using this metamaterial sensor: thickness, ambient temperature, and fabric type. The thermal diffusion coefficient of the fabric samples is decreased with the thickness increasing, which is enhanced by increasing the temperature. In addition, due to differences in preparation processes and materials, the type of fabric sample can also directly affect the thermal conductivity performance. The measurement results verify the feasibility of the metamaterial sensor to measure the thermal conductivity of outdoor clothing fabric samples.

中文翻译：

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用于测量服装面料样品热导率的宽带和高透射率超材料的设计、测量和演示

演示并验证了一种在大频率范围内具有平滑谱线谐振特性的全介电超材料传感器。超材料样品的平均透射率和反射率在4-30 THz频率范围内分别为0.734和0.201。使用该超材料传感器测量了三个重要因素对户外服装面料样品导热率的影响：厚度、环境温度和面料类型。织物样品的热扩散系数随着厚度的增加而减小，随着温度的升高而增大。此外，由于制备工艺和材料的差异，织物样品的类型也会直接影响导热性能。测量结果验证了超材料传感器测量户外服装面料样品导热系数的可行性。