Abstract—The problem of determining the complex dielectric constant of materials in the centimeter and millimeter wavelength ranges is solved using the waveguide method with an double-ridged waveguide. The use of a segment of an double-ridged waveguide as the measuring cell made it possible to expand the operating frequency range and increase the measurement accuracy due to localization of the electromagnetic field energy in the space between metal ridges. The electromagnetic fields of hybrid types of waves in the double-ridged waveguide were calculated by the partial region method taking into account the peculiarities of the electromagnetic field on the metal and dielectric ridges. The results of measuring the complex dielectric constant for samples made of ebonite, Teflon, and fiberglass are presented.

摘要—使用带有双脊形波导的波导方法解决了在厘米和毫米波长范围内确定材料的复介电常数的问题。使用双脊形波导的一部分作为测量单元，由于电磁场能量位于金属脊之间的空间中，因此可以扩展工作频率范围并提高测量精度。考虑到金属脊和电介质脊上电磁场的特殊性，通过局部区域法计算了双脊波导中混合波的电磁场。给出了测量由硬石，铁氟龙和玻璃纤维制成的样品的复介电常数的结果。