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Dual-Band Bandpass Filter Optimized for High Q-Factor

机译：双频带通滤波器针对高Q系数进行了优化

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摘要

High quality factor bandpass filters based on a number of cascaded resonators of dual-resonance mechanism are proposed in the present paper. Each resonator is constructed as two overlapped coplanar waveguide (CPW) resonant structures. The cascaded resonators mediate microwave coupling between two isolated corner-shaped CPW feeders only at the resonant frequencies leading to a bandpass filter of high quality factor. The two resonant frequencies and the separation between them can be fine-tuned by the dimensions of the structure. The effects of the dimensional parameters of the resonator and the feeding CPW regions on the resonant frequencies and the performance of the bandpass filter are investigated. The effect of the loss tangent of the dielectric substrate material on the quality factors at the two resonant frequencies is studied. Three prototypes of the proposed filter are fabricated and experimentally studied for more understanding of the underlying physical principles of operation and for verifying some of the simulation results. The experimental results show good agreement when compared with the corresponding simulation results. It is shown that, at low enough absolute temperature, the proposed structure can operate as superconducting microwave resonator when made from the appropriate materials. Also, it is shown that an optimized design of the proposed bandpass filter, based on superconducting CPWR structure, can achieve quality factors high enough to form a quantum data bus for hybrid architecture of quantum information systems.
机译：本文提出了基于许多双谐振机构级联谐振器的高质量因子带通滤波器。每个谐振器构造为两个重叠的共面波导（CPW）谐振结构。级联谐振器仅在两个隔离的角形CPW进纸器之间介导微波耦合，仅在导致高质量因数的带通滤波器的谐振频率之间。两个共振频率和它们之间的分离可以通过结构的尺寸微调。研究了谐振器的尺寸参数和馈电CPW区域对谐振频率的影响以及带通滤波器的性能。研究了介电基板材料对两个谐振频率的质量因子的损耗正态的影响。拟议过滤器的三种原型是制造的，实验研究，以了解更多地了解操作的潜在物理原则，并用于验证一些模拟结果。与相应的仿真结果相比，实验结果表明良好的一致。结果表明，在足够低的绝对温度下，所提出的结构可以在由适当的材料制成时作为超导微波谐振器操作。此外，结果表明，基于超导CPWR结构的所提出的带通滤波器的优化设计可以实现足够高的质量因素，以形成量子信息系统的混合架构的量子数据总线。

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