The Design and Performance of an X-band Broadband Klystron With Peak Power of 1MW

This paper presents the design and measurement results of an X-band broadband klystron with a peak power of 1MW developed at Aerospace Information Research Institute, Chinese Academy of Science (AIRCAS). In the development of this klystron, the single electron beam with an electromagnetic focusing system was adopted to achieve a high beam transmission rate. Meanwhile, a filter-loaded over-lapping mode double gap coupling cavities output circuit (OMDGOC) and a pill-box output window were used to ensure the klystron has an operating bandwidth of 650MHz. The 1# klystron was tested under a 1 % duty ratio at 27 operating frequency points. The technical specifications of this klystron are as follows: peak power: over 1MW, efficiency: over 24.3 %, gain: over 37.1dB, beam transmission rate: over 96%, which meet the design requirements.