Based on a Ba _(1–x) Sr _x TiO ₃ ferroelectric thin film, a discrete tunable surface mounted device (SMD) capacitor has been developed for microwave frequency applications. The proposed SMD topology has the particular advantage of inherent decoupling between the RF signal and the dc biasing voltage, necessary to tune the ferroelectric permittivity. The design and technological development of the SMD component is presented, and the synthesis of the ferroelectric thin film is summarized. Material characterization shows convenient tunability, while low dielectric losses at 10 MHz. The integration of the SMD tunable capacitor into a Planar Inverted-F Antenna has been done in order to evaluate the agility and tunability performance of the antenna.

中文翻译：

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可调谐铁电微波表面安装器件的设计和开发。

基于Ba _（1–X） 高级 _X TiO ₃铁电薄膜，离散可调表面贴装器件（SMD）电容器已开发用于微波频率应用。拟议的SMD拓扑具有特别的优点，即在射频信号和直流偏置电压之间固有的去耦，这是调节铁电介电常数所必需的。介绍了SMD元件的设计和技术发展，总结了铁电薄膜的合成。材料表征显示出方便的可调性，而10 MHz时的介电损耗低。为了评估天线的敏捷性和可调性，已经将SMD可调电容器集成到平面倒F天线中。