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Dielectric investigation of the Sr3WO6 double perovskite at RF/microwave frequencies

机译：RF /微波频率SR3WO6双钙钛矿介电研究

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摘要

This work reports the dielectric properties of Sr3WO6 (SWO) double perovskite at radio frequencies as a function of the temperature and a study in microwaves range to evaluate the material as a novel dielectric resonator. Thermo-activated charge transfer process for SWO ceramic was observed and two resistor-capacitor associations were fitted for the Nyquist diagram. SWO presented negative values of temperature coefficient of capacitance (TCC) and the activation energies of dielectric relaxation processes were measured by conductivity (1.35 eV), imaginary modulus (1.38 eV) and imaginary impedance (1.36 eV). For the microwave range, SWO shows high dielectric permittivity (13.57) and dielectric loss (0.0281). The dielectric resonator antenna (DRA) fabricated from SWO ceramic presented an operation frequency in 4.1 GHz and return loss below -40 dB. It was possible to evaluate the performance of the antenna from numerical simulation. From these results, the SWO based DRA shows good properties to be used as a novel microwave dielectric resonator.
机译：该工作报告了在射频频率下的SR3WO6（SWO）双钙钛矿的电介质特性，作为温度的函数和微波范围的研究，以评估材料作为新型介电谐振器。观察到SWO陶瓷的热激活电荷转移过程，并为奈奎斯特图安装了两个电阻电容关联。 SWO呈现的电容温度系数的负值（TCC）和介电弛豫过程的激活能量通过电导率（1.35eV）测量，虚数模量（1.38eV）和虚障碍（1.36eV​​）。对于微波范围，SWO显示出高介电介电常数（13.57）和介电损耗（0.0281）。由SWO陶瓷制造的介质谐振器天线（DRA）在4.1GHz中呈现了操作频率，并在-40 dB以下的返回损失。可以评估天线的性能与数值模拟。根据这些结果，基于SWO的DRA显示了用作新型微波介质谐振器的良好性能。

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  • 来源
    《RSC Advances》 |2016年第48期|共8页
  • 作者

    Paiva D. V. M.; Silva M. A. S.; Sombra A. S. B.; Fechine P. B. A.;

  • 作者单位

    Univ Fed Ceara Dept Quim Analit &

    Fisicoquim Grp Quim Mat Avancados GQMAT Campus Pici CP 12100 BR-60451970 Fortaleza CE Brazil;

    Univ Fed Ceara Dept Fis Lab Telecomunicacoes &

    Ciencia &

    Engn Mat LOCEM Campus Pici CP 12100 BR-60451970 Fortaleza CE Brazil;

    Univ Fed Ceara Dept Fis Lab Telecomunicacoes &

    Ciencia &

    Engn Mat LOCEM Campus Pici CP 12100 BR-60451970 Fortaleza CE Brazil;

    Univ Fed Ceara Dept Quim Analit &

    Fisicoquim Grp Quim Mat Avancados GQMAT Campus Pici CP 12100 BR-60451970 Fortaleza CE Brazil;

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  • 正文语种 eng
  • 中图分类 化学;
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