Abstract

A 220 GHz traveling wave tube (TWT) is being developed in our lab. This TWT is based on a folded waveguide circuit with an electron beam focused by periodic permanent magnets (PPMs). To measure the transmission loss of the TWT directly, a prototype without a sever has been built. The maximum output power of this prototype is 1.1 W at 225 GHz. The gain, output power and transmission loss are close to the simulation values. On this basis, a new TWT prototype with a sever is being built to produce higher output power and gain.

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