论文标题
用于量子计算应用的超宽停止带的低通滤波器
Low-pass filter with ultra-wide stopband for quantum computing applications
论文作者
论文摘要
提出了一种基于泄漏的同轴波导的新型低通滤波器。过滤器在通过频带中的插入损失最小，同时实现了停止频段的高衰减。由于其布置，该过滤器不会存在寄生泄漏路径，因此，与常规的共振滤镜不同，停止频带扩展到非常高的频率。结果表明，可以通过添加或删除泄漏的部分来获得特定的停止衰减。研究中心同轴结构与泄漏孔之间的耦合。制造原型，测量散射参数高达145 GHz。该原型显示出小于0.15 dB的插入损失高达10 GHz，衰减超过70 gHz的60 dB。所提出的过滤器适用于超导量子计算应用，在量子计算应用中，Qubits对辐射敏感，能量足以打破库珀对，从而破坏了超导性。
A new type of low-pass filter based on a leaky coaxial waveguide is presented. The filter has minimal insertion loss in the pass band, while at the same time high attenuation in the stop band is achieved. Thanks to its arrangement, the filter does not present parasitic leakage paths, so that, unlike conventional resonant filters, the stop band extends to very high frequencies. It is shown that a particular stop-band attenuation can be obtained by adding or removing leaking sections. Coupling between the center coaxial structure and the leaking holes is investigated. A prototype is manufactured and scattering parameters are measured up to 145 GHz. The prototype shows an insertion loss of less than 0.15 dB up to 10 GHz and an attenuation in excess of 60 dB above 70 GHz. The proposed filter is suitable for superconducting quantum computing applications where qubits are sensitive to radiation with energy high enough to break Cooper-pairs, thereby destroying superconductivity.
