轴向开口无辐射结构：基于样品架的单模谐振腔的一个例子
Axially open nonradiative structures: an example of single-mode resonator based on the sample holder
摘要：
本文推广了无辐射介质谐振器的概念，使之包括具有旋转不变性的轴向开口结构。由此产生的额外的非辐射条件，建立了不同的共振模式的基础上，他们的方位角模态指数。给出了TE_（011）模允许的介电常数和几何参数的近似图。商业熔融石英管的基础上提出的设备的实际实现演示在毫米波长，连同简单的激励和调谐机制。所观察到的共振的特征在于它们的基本参数，以及通过有限元方法的场分布。理论分析的预测在一般性能和预期的品质因数方面都得到了很好的证实。由此产生的装置，其中样品架本身作为单模谐振元件，结合了极容易实现的最先进的性能。最后讨论了所提出的开放式单模谐振器的一般优点。
英文摘要：
The concept of nonradiative dielectric resonator is generalized in order to include axially open configurations having rotational invariance. The resulting additional nonradiative conditions are established for the different resonance modes on the basis of their azimuthal modal index. An approximate chart of the allowed dielectric and geometrical parameters for the TE011 mode is given. A practical realization of the proposed device based on commercial fused quartz tubes is demonstrated at millimeter wavelengths, together with simple excitation and tuning mechanisms. The observed resonances are characterized in their basic parameters, as well as in the field distribution by means of a finite element method. The predictions of the theoretical analysis are well confirmed, both in the general behaviour and in the expected quality factors. The resulting device, in which the sample holder acts itself as single-mode resonating element, combines an extreme ease of realization with state-of-the-art performances. The general benefits of the proposed open single-mode resonators are finally discussed.
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