Measurement of Radiation Power for Ka-Band Relativistic Diffraction Generator

This paper presents the method and results of measurement of radiation power for Ka-band relativistic diffraction generator. The RDG device has two section slow wave structure. For the character of complete overmoded SWS, the spatial integral method of the radiation power measurement is carried out. The radiation mode image and total power are obtained by hot test, which is based on precisely calibrating of the measurement system. The measurement results show that the radiation power exceeds 300 MW with a frequency of 34~38 GHz and a pulse width exceeds 10 ns, and the radition mode is TM0n mode.