Glaskeramiken mit ferro- und paraelektrischen Phasen für Mikrowellenantennen

该建议是DFG项目“用于微波炉的铁电和顺电相玻璃陶瓷”（GLACER）资助的成功研究的延伸。上一阶段的成果包括：（I）具有优异介电性能的新型多组分介电块体玻璃陶瓷系统;（II）基于知识的相图，以估计真正的玻璃相的性质;（III）在天线应用中的吸引力的潜力的初步演示。拟议的科学研究试图回答未来天线技术的进一步挑战。它涵盖了创新链的两个主要方面。(I)基于GLACER项目的经验，计划探索新的多组分系统，进一步提高介电常数和Q因子。(II)相当大的努力将集中在应用潜力，包括高性能介质天线的概念，以及在扩展频谱的可行性。因此，应将材料科学和微波工程两个方面的研究结合起来，促进新材料体系的应用，以实现高效、低成本和紧凑的微波器件。对BaO-TiO_2-Al_2 O_3-ZrO_2-SiO_2-La_2 O_3多元系玻璃形成区进行了深入研究。在系统中的相位关系的平行调查将允许构建边界线，并确定的特征点（共晶，周晶）。通过控制形核和晶化，发展了用于块体玻璃陶瓷形成的特殊热处理制度。另一个令人感兴趣的点是用常用的RO氧化物（R = Sr 2+、Ca 2+或Mg 2+）或这些氧化物的组合存在代替La 2 O3氧化物，这将导致配制不含稀土氧化物的多组分体系。新材料系统将使用窄带和宽带方法进行表征，并额外关注其环境依赖性，为此将建立一个原位高温测量装置。新材料的整体效益和实际性能只能通过评估原型介质天线来确定。在电磁仿真中可以识别和建模玻璃陶瓷的介电常数、介电损耗、均匀性、几何一致性和表面光滑度对天线紧凑性、总效率和性能容差的总体影响，包括它们的微观起源和经验效应。基于对材料特性和加工技术限制的了解，将开发和优化用于特定新颖天线概念的设计方法，包括混合天线、MIMO天线、毫米波DRA和密集天线阵列。在设计之后，将演示和实验评估几种覆盖1 GHz至60 GHz的天线。

This proposal is an extension of the successful research funded by DFG-project "Glass Ceramics with Ferro- and Paraelectric Phases for Microwave Antennas" (GLACER). The achievements of the previous phase include: (I) novel multicomponent dielectric bulk glass ceramics systems with excellent dielectric properties; (II) knowledge based phase diagrams to estimate the properties of a true glassy phase (III) preliminary demonstration of the attractive potential in antenna applications.The proposed scientific research tries to answer further challenges for future antenna technologies. It covers two major aspects of the innovation chain. (I) Based on the experience from GLACER project, it plans to explore new multicomponent systems with further improved permittivity and Q factor. (II) Considerable efforts will focus on the application potentials, including high performance dielectric antenna concepts as well as the feasibility in extended spectrums. Therefore, the two research aspects i.e. of material science and microwave engineering should be brought together to promote the utilization of the new material systems for efficient, low cost and compact microwave components. A new multicomponent system BaO-TiO2-Al2O3-ZrO2-SiO2-La2O3 will be thoroughly investigated for its glass formation region. Parallel investigation of the phase relationships in the system will allow constructing the boundary lines and to identify the characteristic points (eutectic, peritectic). Special heat-treatment regime for bulk-glass ceramic formation is to be developed by controlled nucleation and crystallization. Another interesting point is to replace the La2O3 oxide with commonly used RO oxides (R = Sr2+, Ca2+ or Mg2+) or combined existence of these oxides that will lead to the formulation of a multicomponent system free of rare earth oxides. The new material system will be characterized using narrow- and wide band methods with additional attention on its environmental dependence, for which an in-situ high temperature measurement setup will be built. The overall benefit and the practical performance of the new materials can only be identified through evaluating prototype dielectric antennas. The overall influence of glass ceramics' permittivity, dielectric loss, homogeneity, geometry conformity and surface smoothness on the antenna compactness, total efficiency and performance tolerance can be recognized and modeled in electromagnetic simulation including their microscopic origins and empirical effects. Based on the knowledge of material properties and constrains in processing technologies, the design methodology for specific novel antenna concepts, including hybrid DRA, MIMO DRA, Millimeter wave DRAs and dense DRA arrays are to be developed and optimized. Following the designs, several antennas covering 1 GHz up to 60 GHz will be demonstrated and experimentally evaluated.