基于非线性超传导的能流不对称传输现象的研究

研究了非线性传输线电路禁带内能量的不对称传输现象. 传输线电路中的两子电路结构相同,电感参数不同,并且具有低通滤波器的特点. 鉴于驱动频率在通频带的截止频率之上,所以形成不对称能流的载体为 禁带内传播的非线性波.该研究中,产生不对称能量传输的机理与非线性超传导现象密切相关. 通过调整耦合电感的大小,总结出传输能量与耦合强度之间的变化规律. 同时也采用仿真的方式分析了驱动电压幅值与传输能量间的相关性. 最后,通过在实验上改变驱动频率的大小,得到超传导发生时的门限电压与驱动频率间的依赖关系, 该关系与理论计算的结果完全定性一致.

The study of asymmetric energy transmission based on the nonlinear supratransmission

In this paper, the phenomenon of the asymmetric energy transmission is numerically investigated in the forbidden band of the electrical transmission line formed by two nonlinear segments which are identical in structure but different in inductor parameter. By considering the driving voltage at the frequency within the forbidden bands of both segments, the carrier of the asymmetric energy flux is the nonlinear wave beyond the band, instead of the linear wave in the passband, and the mechanism is closly related to the nonlinear supratransmission. To further understand this phenomenon in electrical transmission line, we also study the correlations between the energy intensity and the circuit parameters. Finally, we investigate the dependency of the voltage threshold on the driving frequency in physical experiment, and the result is qualitatively identical with that calculated by using equation.