22-GHz Measurements of Dielectric Constants and Loss Tangents of Castable Dielectrics at Room and Cryogenic Temperatures (Short Papers)

The dielectric constants and loss tangents of a number of castable dielectrics such as different epoxies were measured at 22 GHz at both room temperature and 77 K using a resonant cavity technique. It was found that these high-frequency values differ significantly from published low-frequency values, and that the losses decrease dramatically at cryogenic temperatures.