Measurement results of uniaxially anisotropic materials performed with the aid of a plano-concave Fabry–Perot open resonator in the 20–50 GHz frequency range are presented and discussed in this letter. It is shown that a linear polarization of Gaussian modes applied in the characterization allows extracting in-plane complex permittivity of such materials as crystals and foils in a single measurement cycle. It is also shown that dielectric losses exhibit anisotropy, which can be quite significant, like in the sapphire, or relatively small, like in polymer foils.

中文翻译：

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在 20-50 GHz 范围内用 Fabry'erot 开式谐振器测量单轴各向异性电介质


本信介绍并讨论了借助平凹法布里-珀罗开放式谐振器在 20-50 GHz 频率范围内进行的单轴各向异性材料的测量结果。结果表明，在表征中应用高斯模式的线性偏振可以在单个测量周期中提取晶体和箔等材料的面内复介电常数。还表明，介电损耗表现出各向异性，该各向异性可能非常显着（如在蓝宝石中），也可能相对较小（如在聚合物箔中）。