Whispering gallery traveling wave interferometer for low phase noise applications

Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004. Pub Date : 2004-08-23 DOI:10.1109/FREQ.2004.1418562

D. Tsarapkin, N. Shtin

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引用次数: 5

Abstract

Traveling wave filters utilizing sapphire resonators excited at whispering gallery modes (WGR) have a good perspective for application as a microwave interferometer in the field of ultralow phase noise microwave sources. Our paper examines in detail a classical approach of a traveling wave (TW) disk dielectric WGR coupled with a dielectric waveguide. The TW WGR design is obtained by means of direct electrodynamic 3D FEA. The permittivity properties of WGR were assumed to be the same as for sapphire while its tg/spl delta/ was artificially increased ten times to simplify the FEA procedure. During analysis, an S-parameter matrix of the structure was investigated. It was found that in a TW regime the transmission coefficient of the TW WGR has a bridge-type frequency response similar to that which is realized with the resonator reflected wave extraction using a ferrite circulator. The input reflection coefficient of the structure is found to have a relatively low magnitude. On the other hand, the analysis revealed strong dependence of the TW regime realization on dimensions of the primary dielectric waveguide and coupling parameters.

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低相位噪声应用的行波干涉仪

利用在窃窃廊模式下激发的蓝宝石谐振腔行波滤波器作为微波干涉仪在超低相位噪声微波源领域有很好的应用前景。本文详细研究了行波盘介质WGR与介质波导耦合的一种经典方法。采用直接电动力三维有限元分析方法，得到了TW水轮机的设计方案。假设WGR的介电常数性质与蓝宝石相同，但人为地将其tg/spl δ /增加10倍以简化有限元分析程序。在分析过程中，研究了结构的s参数矩阵。研究发现，在TW区，TW WGR的传输系数具有与利用铁氧体环行器进行谐振腔反射波提取所实现的相似的桥式频率响应。该结构的输入反射系数具有较低的量级。另一方面，分析表明，TW状态的实现强烈依赖于主介质波导的尺寸和耦合参数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004.

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