A positively-negatively tapered helix TWT were designed and fabricated.The results show that the measured efficiency of the tapered TWT reaches 29%, while that of the non-tapered TWT is 19%.

• 设计并加工了一支采用双跳变结构的螺旋线行波管，实测结果表明：采用双跳变结构后可将电子效率从19%25提高到29%25；