介电可调材料及其微波应用

Microwave Applications of Dielectric Tunable Materials

基于可调谐材料的微波器件是当前介电应用研究的热点之一,典型的应用包括移相器、天线波束控制、谐振器、滤波器、电压控制振荡器、匹配网络和可调功率分配器等,可调电容器是可调谐微波器件的核心。本综述在比较电容器结构性能优劣的基础上,系统论述了各类材料包括生物聚合物、金属有机框架材料、陶瓷-聚合物复合材料、液晶和氟聚合物的结构与介电可调性能的关系。结果表明,氟聚合物因其机械柔性、易加工和轻质等特点,可成为许多新应用的潜在候选材料。本文也可为微波领域的各类应用在材料选择等方面提供帮助。

Microwave devices based on tunable materials are one of the focuses of current dielectric application research. Typical applications include phase shifter, antenna beam control, resonator, filter, voltage controlled oscillator, matching network and tunable power distributor, etc. Tunable capacitor is the core of tunable microwave devices. Based on the comparison of the structural properties of capacitors, this review systematically discusses the relationship between the structure and dielectric tunable properties of various materials including biopolymers, metal-organic frameworks, ceramic-polymer composites, liquid crystals and fluoropolymers. The results show that fluoropolymers can be promising candidate materials for many new applications due to their mechanical flexibility, ease of processing and light weight. This article can also offer help for various microwave applications in material selection and other aspects.