Tunable composites with low permittivity for microwave applications

该项目的目标是研究和开发用于微波应用的无机复合材料，与BST厚膜相比，具有更低介电损耗和更低介电常数的特性，具有相似的可调性。为了达到这一目标，制备并表征了可调谐铁电体，即钡锶钛酸盐（Ba0,6Sr0,4TiO3）和具有低介电常数和小损耗的不可调谐介电体，即硼酸镁（Mg3B2O6）的组合。本扩展项目的主要重点是系统研究涂层复合材料和三元复合材料的发展前景。一个方面是进一步发展模拟方法以模拟复合材料的介电性能。以下目标是工作计划的一部分：非线性电可调复合材料的三维电磁仿真，涂层复合材料的开发和优化，三元复合材料的实现和建模。

The goal of the project is the investigation and the development of inorganic composite materials for microwave applications having similar tunability compared to a BST thick film with the property of less dielectric losses and lower permittivity. Combinations of a tunable ferroelectric, namely Barium-Strontium-Titanate (Ba0,6Sr0,4TiO3), and a non-tunable dielectric having low permittivity and little losses namely Magnesium Borate (Mg3B2O6) are produced and characterized to reach the goal. The main focus of this extended project is the systematic investigation of the promising approach of coating composites as well as of ternary composites. One aspect is the further development of the simulation methods in order to model the dielectric properties of the composites. The following objectives are part of the working program: 3D electro-magnetic simulation of non-linear electrical tunable composite materials, development and optimization of coated composites, realization and modelling of ternary composite materials.