基于微米颗粒填充的粉末低通滤波器仿真

粉末滤波器是一种可应用于超导量子计算等低温实验系统的低通滤波器, 随着频率的升高滤波器会对信号产生急剧的有效衰减, 粉末滤波器的填充材料、 中心导线长度、 线径和结构等参数会对它的频率响应特性产生影响. 本文利用 CST 微波工作室基于微米颗粒填充的方式, 首次对不同中心导线结构的粉末滤波器性能进行三维仿真研究, 仿真结果与实测结果对比后的定性一致性, 说明仿真方法的可行性和准确性. 仿真方法的提出可以有效地加快滤波器结构的迭代速度, 从而降低研发周期和成本, 方便可应用于超导量子计算的新一代粉末滤波器的开发.

Simulation of Powder Low-pass Filter based on Micron Particle Filling

Powder filter is a low-pass filter that can be applied to low-temperature experimental systems such as superconducting quantum computing.As the frequency increases,the filter will effectively attenuate the high frequency signal.The parameters such as the filling material of the powder filter,the length of the center wire,the thickness of the center wire,and the structure of the center wire will affect its frequency response characteristics.In this work,the CST microwave studio is used for the first time to conduct a 3D simulation study on the frequency response characteristics of powder filters with different central structures based on the filling method of micron particles.The qualitative consistency between the simulation results and the measured results shows the feasibility and accuracy of the simulation method.The proposed simulation method can effectively speed up the iteration speed of the filter structure,thereby reducing the development cycle and cost.This work facilitates the development of a new generation of powder filters that can be applied to superconducting quantum computing.