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首页> 外文学位 >Tunable ferroelectric meta-material phase shifter embedded inside low temperature co-fired ceramics (LTCC).
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Tunable ferroelectric meta-material phase shifter embedded inside low temperature co-fired ceramics (LTCC).

机译：嵌入低温共烧陶瓷（LTCC）内部的可调铁电超材料相移器。

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摘要

This dissertation describes electrically tunable microwave devices utilizing low temperature co-fired ceramics (LTCC) and thick film via filled with the ferroelectric materials barium strontium titanate (BST) and barium zirconate titanate (BZT). Tunable ferroelectric capacitors, zero meta-material phase shifters, and tunable meta-material phase shifters are presented.;Microwave phase shifters have many applications in microwave devices. They are essential components for active and passive phased array antennas and their most common use is in scanning phased array antennas. They are used in synthetic aperture radars (SAR), low earth orbit (LEO) communication satellites, collision warning radars, and intelligent vehicle highway systems (IVHS), in addition to various other applications. Tunable ferroelectric materials have been investigated, since they offer the possibility of lowering the total cost of phased arrays. Two of the most promising ferroelectric materials in microwave applications are BST and BZT. The proposed design and implementation in this research introduce new types of tunable meta-material phase shifters embedded inside LTCC, which use BST and BZT as capacitive tunable dielectric material controlled by changing the applied voltage.;This phase shifter has the advantages of meta-material structures, which produce little phase error and compensation while having the simultaneous advantage of using LTCC technology for embedding passive components that improve signal integrity (several signal lines, power planes, and ground planes) by using different processes like via filling, screen printing, laminating and firing that can be produced in compact sizes at a low cost.;The via filling technique was used to build tunable BST, BZT ferroelectric material capacitors to control phase shift. Finally, The use of the proposed ferroelectric meta-material phase shifter improves phase shifter performance by reducing insertion loss in both transmitting and receiving directions for phased array antennas, reducing phase error, improving figure of merit (FOM) and phase shifter tunability around center frequency, and also enables the integration of the phase shifters with the microwave circuits on one substrate, thus substantially reducing the size, mass, and cost of the antennas.
机译：本文介绍了利用低温共烧陶瓷（LTCC）和厚膜通孔填充铁电材料钛酸锶钡（BST）和锆钛酸钡（BZT）的电可调微波设备。介绍了可调铁电电容器，零超材料移相器和可调超材料移相器。微波移相器在微波设备中有许多应用。它们是有源和无源相控阵天线的基本组件，最常见的用途是扫描相控阵天线。除各种其他应用外，它们还用于合成孔径雷达（SAR），低地球轨道（LEO）通信卫星，碰撞预警雷达和智能汽车公路系统（IVHS）。已经研究了可调谐铁电材料，因为它们提供了降低相控阵总成本的可能性。微波应用中最有前途的两种铁电材料是BST和BZT。本研究中的拟议设计和实现方法介绍了嵌入在LTCC内的新型可调谐超材料移相器，它们使用BST和BZT作为通过改变施加电压来控制的电容性可调介电材料。该移相器具有超材料的优点结构，几乎不会产生相位误差和补偿，同时具有使用LTCC技术嵌入无源组件的同时优势，这些无源组件通过使用不同的过程（例如，填充，丝网印刷，层压）改善了信号完整性（几条信号线，电源层和接地层） ；通孔填充技术用于构建可调谐的BST，BZT铁电材料电容器，以控制相移。最后，通过减少相控阵天线在发射和接收方向上的插入损耗，减少相位误差，改善品质因数（FOM）和移相器在中心频率附近的可调谐性，所提出的铁电超材料相移器的使用提高了移相器性能。而且，还可以将移相器与微波电路集成在一个基板上，从而大大减少了天线的尺寸，质量和成本。

著录项

  • 作者

    Tork, Hossam S.;

  • 作者单位

    University of Idaho.;

  • 授予单位 University of Idaho.;
  • 学科 Chemistry Inorganic.;Engineering Electronics and Electrical.;Engineering Materials Science.
  • 学位 Ph.D.
  • 年度 2012
  • 页码 112 p.
  • 总页数 112
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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