Geometrical Perturbation Techniques and Approximate Analysis for Eigenmode Splitting and Shifting in Electromagnetic Planar Dual-Mode Resonators.
Geometrical Perturbation Techniques and Approximate Analysis for Eigenmode Splitting and Shifting in Electromagnetic Planar Dual-Mode Resonators.
复制标题
电磁平面双模谐振器中本征模分裂和移位的几何扰动技术和近似分析。
DOI：
10.1038/s41598-018-37787-x
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发表时间：
2019
影响因子：
4.6
通讯作者：
Naji A
中科院分区：
文献类型：
--
作者：
Naji A
双模电磁谐振器用于物理和工程中的许多系统和应用中。它们依靠简并模分裂来控制使用它们的系统的光谱特性。然而，控制（分裂或移位）这些特征值以完全调谐频率响应是一个重要的问题，涉及使用几何扰动理论以及使调谐过程成为可能的有损耗电子元件。在本文中，我们提出了新的几何技术来控制双模谐振器的本征模式，突出了所选择的几何形状和性能（测量的空载品质因数，Q0）之间的强连接。所提出的结构的主要优点包括用于频率分裂和移位的电子几何可调谐性，以及使用埋入式馈电来改善插入损耗和回波损耗性能。场分析被用来显示性能如何被几何结构本身而不是被调谐元件降级。讨论包括推导近似的分析模型，突出的性能退化的来源，甚至在任何调谐元件插入的几何形状。所提出的概念进行了验证的测量扰动微波谐振器。
Dual-mode electromagnetic resonators are used in numerous systems and applications in physics and engineering. They rely on degenerate-mode splitting to control the spectral properties of the system that employs them. Controlling (splitting or shifting) these eigenvalues to fully tune the frequency response, however, is a nontrivial problem that involves the use of geometrical perturbation theory as well as lossy electronic elements that enable the tuning process. In this paper we present novel geometrical techniques to control the eigenmodes of dual-mode resonators, highlighting the strong connection between the chosen geometry and performance (measured by the unloaded quality factor,Q0). Key advantages of the presented structures include electronic geometric tunability for frequency splitting and shifting, as well as the use of buried feeds to improve insertion loss and return loss performance. Field analysis is used to show how the performance is degraded by geometry itself, rather than by the tuning elements. The discussion includes derivation of approximate analytical models that highlight the sources of performance degradation in the geometry even before any tuning elements are inserted. The presented concepts are verified by measurements on perturbed microwave resonators.