Modified Lumped Parameter Method for Measurements of Dielectric Susceptibility in Ferroelectrics

Abstract

The transmission techniques for dielectric measurements can be classified into two categories; one belongs to the lumped capacitance method and the other is related to the distributed parameter method. In reality, however, the dielectric dispersion for high dielectric constant materials in the frequency range 1 MHz–5 GHz could not be made accurately by using the transmission techniques. In this work, a modified lumped parameter method has been discussed. We call this modified method as the quasi lumped parameter method which is especially suitable for the microwave measurements of dielectric dispersion for high dielectric materials in a particular frequency region. The proposed method combines some features of both the lumped parameter method and the distributed parameter method. By using this measurement method, the measurements of dielectric dispersions are presented for several ferroelectric materals, such as Pb(Zr1-x Tix )O3, and BaTiO3 in the frequency domain from 1 MHz to 1 GHz.