中文摘要：

单级高频脉冲管制冷机直接降低到20K以下温区存在很大困难，采用多级方案是高频脉冲管制冷机获得更低温度的主要方法。本文介绍了一套高频气耦合型两级脉冲管制冷机的性能特性，该脉冲管制冷机可以达到16．1K的最低温度，是目前有报道高频气耦合型两级脉冲管制冷机的最低温度。文中给出了双向进气、频率和输入功率对最低温度的影响。

英文摘要：

Use single stage version to reach the temperature of 20 K is a difficulty for high frequency pulse tube cooler（PTC）. Multi-stage version is a popular method to reach the low temperature. This paper introduced the performance of a high frequency gas-couple two-stage PTC, which has reach the lowest temperature of 16.1 K, this is reported lowest temperature for high frequency gas-couple two-stage PTC. The effect of double inlet, frequency and input power on the temperature of cold tip is shown in this paper.