A broad-band measuring equipment for determining the complex permittivity of liquid dielectric materials within the frequency range of 1 MHz to 1 GHz

作者：O. Göttmann, Achim Dittrich · 发表于：Journal of Physics E Scientific Instruments · 年份：1984 · DOI：10.1088/0022-3735/17/9/013 · 被引用次数：26 · 研究领域：Microwave and Dielectric Measurement Techniques、Soil Moisture and Remote Sensing、Acoustic Wave Resonator Technologies

A technique is presented to determine the complex permittivity epsilon = epsilon '-j epsilon " by means of a coaxial line set-up for transmission coefficient measurement within the frequency range of 1 to 1000 MHz. A highly sensitive broad-band vectorvoltmeter and dielectric sample cells of the cut-off variety enable precise measurements in a comparatively short time and ease of handling. The cells are designed for the investigation of weakly as well as highly polar liquid dielectrics. The relative error of the real part epsilon ' of the complex permittivity typically amounts to 1-2% and the absolute error of the dielectric loss angle up to 0.3 degrees .