用于射频超导量子干涉器的新型单CSRR磁通聚焦器和谐振器

Novel flux concentrator with a single CSRR surrounded by a resonator for radio frequency superconducting quantum interference device

文提出了一种新型磁通聚焦器和谐振器.磁通聚焦器引入了单互补开环谐振器结构(单CSRR);谐振器则采用环绕着绕磁通聚焦器的发夹型3阶阶梯阻抗谐振器(SIR).采用ANSYS HFSSv.11高频结构仿真软件对提出的磁通聚焦器和谐振器进行了仿真,并对单CSRR进行了理论分析.仿真和理论分析表明:单CSRR的引入,提高了磁通聚焦器的聚磁效果,改善了磁通聚焦器与RF SQUID垫圈的耦合(耦合系数k_(sc)为引入单CSRR前的2倍),并且有效面积增大到1.227 mm^2.

A novel flux concentrator surrounded by a resonator is proposed in this paper. A complementary single split ring resonator （single CSRR） is introduced for the flux concentrator, while the resonator surrounding the flux concentrator employs a third-order steppedimpedance hairpin resonator （SIR）. High frequency structure simulation software ANSYS HFSSv. 11 is used to simulate the proposed flux concentrator and resonator. Moreover, the single CSRR is analyzed theoretically. Simulation and theoretical results shows that the novel flux concentrator surrounded by a resonator introduces a single CSRR, which improves the flux focus effect of the concentrator significantly, and so enhances the performance of coupling between the RF SQUID and the flux concentrator （the coupling coefficient ksc is improved 2 times） and increases the effective area to 1.227 mm^2.