From the phase shift and amplitude adjustment of the flow impedance, the performance of the various pulse tube coolers is theoretically analyzed.

• 该方法很好地弥补了传统相位理论片面注重各种结构的调相功能而忽略其调幅功能的不足,更好地揭示了它们的作用机理,具有简单、直观的突出优点。