Dielectric Measurements on Liquid Resins and Curing Agents from 10-200 MHz

The goal was to develop a simple method for determining the dependence of dielectric constant and loss tangent on frequency in the range 10-200 MHz for a number of dielectrically lossy liquid resins. A test cell was devised which could be used with an available Hewlett-Packard RX meter. The calculations were worked out based on a calibration of cell constants and series inductance determined with five standard liquids. Data for five commercial resins and four curing agents are given. The method provides 5-percent or better accuracy up to 200 MHz.