Dielectric characterization of materials at microwave frequency range

AUTOR(ES)

de los Santos, J., Garcia, D., Eiras, J.A.

FONTE

Materials Research

DATA DE PUBLICAÇÃO

2003-01

RESUMO

In this study a coaxial line was used to connect a microwave-frequency Network Analyzer and a base moving sample holder for dielectric characterization of ferroelectric materials in the microwave range. The main innovation of the technique is the introduction of a special sample holder that eliminates the air gap effect by pressing sample using a fine pressure system control. The device was preliminary tested with alumina (Al2O3) ceramics and validated up to 2 GHz. Dielectric measurements of lanthanum and manganese modified lead titanate (PLTM) ceramics were carried out in order to evaluate the technique for a high permittivity material in the microwave range. Results showed that such method is very useful for materials with high dielectric permittivities, which is generally a limiting factor of other techniques in the frequency range from 50 MHz to 2 GHz.

Documentos Relacionados

• Measured Dielectric Permittivity of Contaminated Sandy Soil at Microwave Frequency
• Dielectric study at microwave frequencies of phase transitions in multiferroic ceramics
• Frequency Selective Surface Properties of Microwave New Absorbing Porous Carbon Materials Embedded in Epoxy Resin
• Investigate the Effect of Dielectric Properties on Microwave Absorption of Pyramidal Microwave Absorber
• Synthesis, characterization and microwave dielectric properties of flower - like Co(OH)2/C nanocomposites