The experimental equipments and the measurement method are described in detail. The results of the first experiment are given. The peak power of the relativistic BWO is about 981MW in 3cm -band and the efficiency is about 10%.

• 简述相对论返波管的基本原理,详细介绍了实验装置与测试方法,报导了初步实验结果,在3cm波段峰值功率约98MW,效率10%25左右。