This article presents a frequency reconfigurable RF impedance tuner using eight cascaded fluidic cells to cover the frequency band [0.9, 2.4] GHz. The tuner is made of eight fluidic fillable cavities on top of a coplanar waveguide transmission line in a single low-temperature cofired ceramic (LTCC) substrate. Each cavity is either kept empty or filled with deionized (DI) water to alter the substrate’s permittivity and so change the tuner’s response. Closed-form expressions are derived and used to dimension the tuner’s individual cells, while 3-D field simulations are used to complete the design of a single cell and an entire eight-cell tuner. Both components are fabricated, and good agreement between simulation and measured is observed. The fabricated tuner is used to build a fluidic reconfigurable RF amplifier.

中文翻译：

---

用于低微波频率可重构电路的基于 LTCC 的流体调谐器

本文介绍了一种频率可重构射频阻抗调谐器，该调谐器使用八个级联流体单元来覆盖 [0.9, 2.4] GHz 频段。调谐器由位于单个低温共烧陶瓷 (LTCC) 基板中的共面波导传输线顶部的八个流体可填充腔构成。每个腔体要么保持空腔，要么充满去离子 (DI) 水，以改变基板的介电常数，从而改变调谐器的响应。封闭形式的表达式被导出并用于确定调谐器的单个单元的尺寸，而 3-D 场模拟用于完成单个单元和整个八单元调谐器的设计。两个组件都被制造出来，并且观察到模拟和测量之间的良好一致性。制造的调谐器用于构建流体可重构射频放大器。