Dielectric measurements on liquid resins and curing agents from 10 to 200 MHz

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