Glaskeramiken mit ferro- und paraelektrischen Phasen für Mikrowellenantennen

用于微波天线的具有铁电和顺电相的玻璃陶瓷

• 批准号: 176965184
• 负责人: Professor Dr.-Ing. Rolf Jakoby
• 金额: --
• 依托单位: Fachgebiet Mikrowellentechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/176965184?language=en
• 关键词: Glaskeramiken; mit; ferro; und; paraelektrischen

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.

这项建议是DFG项目“微波天线用铁电和顺电微晶玻璃”(GICER)资助的成功研究的延伸。前一阶段的成果包括：(I)具有优异介电性能的新型多元介电大块微晶玻璃系统；(Ii)基于知识的相图来估计真正的玻璃相的性质；(Iii)初步展示了天线应用的吸引力潜力。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)根据冰川项目的经验，计划探索新的多组分系统，进一步改善介电常数和Q因子。(2)相当大的努力将集中在应用潜力上，包括高性能介质天线的概念以及在扩展频谱中的可行性。因此，应将材料科学和微波工程两个方面的研究结合起来，促进新材料体系在高效、低成本、紧凑的微波器件中的应用。对BaO-TiO2-Al_2O_3-ZrO_2-SiO_2-La_2O_3多元系玻璃的形成区域进行了深入的研究。平行研究体系中的相关系将允许建立边界线并识别特征点(共晶、包晶)。块体玻璃陶瓷形成的特殊热处理制度是通过控制形核和晶化来开发的。另一个有趣的观点是用常用的RO氧化物(R=Sr2+、Ca2+或Mg2+)或这些氧化物的组合存在来取代La2O3氧化物，从而形成一个没有稀土氧化物的多元体系。新材料系统将使用窄带和宽带方法进行表征，并特别关注其与环境的相关性，为此将建立现场高温测量装置。新材料的整体效益和实用性能只能通过对原型介质天线的评估来确定。微晶玻璃的介电常数、介电损耗、均匀性、几何一致性和表面平整度对天线的紧凑性、总效率和性能容差的影响可以在电磁仿真中识别和模拟，包括它们的微观来源和经验效应。基于对材料性能和加工技术约束的了解，将开发和优化特定新型天线概念的设计方法，包括混合DRA、MIMO DRA、毫米波DRA和密集DRA阵列。在设计之后，将展示几种覆盖1 GHz到60 GHz的天线，并进行实验评估。