简要介绍了一种W波段分布作用速调管的设计思路、设计方案和模拟结果，并给出了该管的测试结果。该管采用大压缩比圆柱电子枪和永磁聚焦系统，阴极电压17 kV，阴极电流0.78 A；高频系统由5间隙和11间隙（输出腔）的分布作用腔组成，采用长短槽梯形结构。样管实现了脉冲输出功率大于2 kW、带宽500 MHz、增益40 dB、工作比5%等指标。

This paper briefly introduces the design of a W-band extended interaction klystron (EIK), and gives the test results. The high frequency extended interaction circuit consisted of five 5-gap buncher cavities and one 11-gap output cavity which can obtain wider bandwidth. This ladder-type multi-gap cavity circuit is easy to fabricate and supports greater energy margins. The π-mode is selected as the operating mode of the 5-gap (or 11-gap) cavities. By now, with an electron beam of 17 kV and 0.78 A, the EIK has achieved a peak output power of 2 kW, bandwidth of 500 MHz, gain of 40 dB, and duty cycle of 5%.