Tunable Capacitor Composed of Al2O3-Doped Barium Strontium Titanate for Application in Voltage Control Oscillator

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概要

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• The effect of an applied DC control voltage on the capacitance of a ferroelectric-based tunable capacitor for application in a voltage control oscillator has been studied. The tunable capacitor is composed of Al2O3-doped barium strontium titanate. The capacitance of the tunable capacitor decreases with increasing applied control voltage. The real part of the relative dielectric constant of Al2O3-doped barium strontium titanate decreases rapidly before 1.0 kV/cm and slowly after 1.0 kV/cm. This can be explained by the space charge polarization theory. Curve fitting works well for all capacitors composed of Al2O3-doped barium strontium titanate. The fitted grading coefficient varies with Al2O3 content at the same trend as that exhibited by grain size. This is due to the effect of internal stress among grains.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2007-04-15

著者

• Lin Jing-yuan

  Department Of Electrical Engineering Lunghua University Of Science And Technology

• CHEN Yih-Chien

  Department of Electrical Enggineering, National Cheng-Kung University

• Wang Shun-Chung

  Department of Electrical Engineering, Lunghua University of Science and Technology, Gueishan Shiang, Taoyuan County, Taiwan

• Wang Shun-Chung

  Department of Electrical Engineering, Lunghua University of Science and Technology, Gueishan Shiang, Taoyuan County 33306, Taiwan

• Lin Jing-Yuan

  Department of Electrical Engineering, Lunghua University of Science and Technology, Gueishan Shiang, Taoyuan County, Taiwan

• Chen Yih-Chien

  Department of Electrical Engineering, Lunghua University of Science and Technology, Gueishan Shiang, Taoyuan County, Taiwan

関連論文

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• Influence of CuO Addition and Sintering Temperature on Microwave Dielectric Properties of Ca0.99Zn0.01La4Ti5O17 Ceramics for Application in Stacked Patch Antenna
• Tunable Capacitor Composed of Al2O3-Doped Barium Strontium Titanate for Application in Voltage Control Oscillator
• Curve Fitting of DC Field Dependence of Dielectric Constant of Barium Strontium Titanate Powder Prepared by Sol–Gel Process
• Curve Fitting of Dielectric Constant and Loss Factor of ZrO2-Doped Barium Strontium Titanate for Application in Phased Array Antennas

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