Dielectric Properties of AL2O3-Doped Barium Strontium Titanate for Application in Phased Array Antennas

Wu Long, Yih Chien Chen, Yi Ping Chou, Yuan Tu Tsai, Sheng Yuan Chu

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42 Citations (Scopus)

Abstract

Effects of Al2O3 doping on the dielectric properties of barium strontium titanate for application in phased array antennas have been studied. The grain size of the specimen is maximum for barium strontium titanate doped with 1 wt% A12C3. The density and the real part of the relative dielectric constant decreases with increasing AljOj content. The loss factor is minimum for barium strontium titanate doped with 2 wt% A^Oa content. The real part of the dielectric constant and the loss factor with frequency of all the specimens is stable in the measurement frequency range from 1 MHz to 40 MHz. The real part of the dielectric constant of the specimens decreases with increasing applied DC field. The loss factor of the specimens is influenced much less by the DC field than the real part of the dielectric constant. The tunability is about 24% for barium strontium titanate doped with 1 wt% AhOs content.

Original languageEnglish
Pages (from-to)5154-5161
Number of pages8
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume38
Issue number9 A
Publication statusPublished - 1999

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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