利用 CST PIC 计算了基于双排矩形波导慢波结构的 W 波段行波管的注波互作用,在采用10 kV,70 mA的电子注的条件下,在92~97 GHz范围内,输出功率大于35 W,增益大于30 dB,电子效率约为5%.即使在10 kV较低的电压下,双排矩形波导慢波结构的尺寸仍然较大,有利于降低制造难度.提出了一种基于电火花线切割的加工制造工艺,成功制造了双排矩形波导慢波结构部件.在92~97 GHz 范围内对所需盒形窗和电子枪进行了计算机模拟,设计、加工了盒形窗和电子枪的相关零件,制造了相关部件.将慢波结构部件和输能窗部件组装起来进行了冷测,驻波比在90~100 GHz范围内小于2.067.%Beam-wave interaction for a W band traveling wave tube(TWT)based on staggered double rectangular waveguide structure(SDRWS)is calculated by CST PIC,showing that the TWT has over 35 W output power and over 30 dB gain and about 5% electron efficiency from 92 GHz to 97 GHz on the condition of a 10 kV,70 mA beam.Even if the beam voltage of 10 kV is relatively low,the sizes of SDRWS still remain relatively large,meaning that SDRWS is in favor of evading the difficul-ties in manufacturing.A process based on wire electrical discharge machining(wire-EDM)is proposed to manufacture SDRWS for W band TWT,and an SDRWS assembly is successfully obtained.Besides,box-shaped window and electron gun are also simula-ted by computer,and correspondent parts are manufactured and then put together into assemblies.Then"cold test"is performed on an SDRWS assembly put together with two box-shaped windows,showing that voltage standing wave ratio is lower than 2.067 from 92 GHz to 100 GHz.
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