Dielectric characterization of materials at microwave frequency range
Open Access
- 1 January 2003
- journal article
- Published by FapUNIFESP (SciELO) in Materials Research
- Vol. 6 (1), 97-101
- https://doi.org/10.1590/s1516-14392003000100017
Abstract
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 GHzKeywords
This publication has 12 references indexed in Scilit:
- Investigation of barium strontium titanate thick films for tunable phase shiftersJournal of the European Ceramic Society, 2001
- Microwave dielectric relaxation of ferroelectric PLZT ceramics in the range of 300-900 KThe European Physical Journal Applied Physics, 2001
- Plasticizing dense alumina slurries with mono- and di-saccharidesMaterials Letters, 2000
- Dielectric behaviour of mixed Mg–Zn ferrites at low frequenciesMaterials Letters, 1999
- Dielectric relaxation in PLT (Pb1-XLaXTiO3) ceramics in the microwave region (0.05 -2.0 Ghz)Ferroelectrics, 1999
- Dielectric properties of alumina lamellar ceramicsMaterials Science and Engineering B, 1998
- Ferroelectric phase shifters and their performance in microwave phased array antennasIntegrated Ferroelectrics, 1995
- Piezoelectric and dielectric properties of some la, mn modified pbtio3 ceramicsFerroelectrics, 1991
- Polar relaxation mode in pure and iron-doped barium titanatePhysical Review B, 1989
- Radio-frequency dielectric measurements at temperatures from 10 to 450 KJournal of Applied Physics, 1989