HIGH-FREQUENCY DIELECTRIC-PROPERTIES OF PLZT THIN-FILMS

The dielectric constant and loss tangent of a variety of compounds of sol-gel PLZT have been studied at frequencies of up to 50 GHz. The met hod of investigation involves measuring microwave striplines with smal l parallel plate capacitors shunted to ground. Measured S-parameters a re used to calculate dielectric properties. The data shows no signific ant dielectric dispersion mechanism in the 1 - 50 GHz range. It does a ppear that a moderate loss in dielectric constant is due to domain wal l effects.