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介质谐振器是目前高温射频超导量子干涉器较常采用的一种高品质因数微波谐振器.它是由10mm×10mm×1mm的SrTiO3(STO)标准衬底及覆盖在其上的YBa2Cu3O7-δ(YBCO)薄膜磁通聚焦器共同构成的.为探明磁通聚焦器构形对介质谐振器谐振频率的影响,本文采用Ansoft公司出品的HFSS高频结构仿真软件对磁通聚焦器构形不同的若干介质谐振器的谐振特性进行了仿真.结果表明:增大磁通聚焦器开缝宽度,或者减小磁通聚焦器中心磁通聚焦孔半径,都会造成介质谐振器谐振频率升高.为验证仿真结果的可信性,抽样制备了一些介质谐振器并实际测量了它们的谐振特性,实测结果与仿真结果基本一致.研究表明,改变磁通聚焦器构形是调节介质谐振器谐振频率的一种有效方法.
Dielectric resonator is a kind of high quality factor microwave resonator commonly used in high-temperature RF superconducting quantum interference device, which is composed of 10 × 10 × 1mm SrTiO3 (STO) standard substrate and YBa2Cu3O7-δ (YBCO) thin film flux concentrator.To find out the influence of the flux concentrator configuration on the resonant frequency of the dielectric resonator, this paper uses the HFSS high-frequency structure simulation software from Ansoft company to analyze the configuration of the flux concentrator The results show that increasing the slot width of the flux concentrator or decreasing the radius of the focus aperture of the flux concentrator will result in the increase of the resonance frequency of the dielectric resonator The reliability of the simulation results was verified, some dielectric resonators were sampled and their resonance characteristics were measured, and the measured results are basically consistent with the simulation results.Research shows that changing the configuration of the flux concentrator is to adjust the resonant frequency of the dielectric resonator An effective method.