The article presents the construction of the slow-wave structure with metalloceramic supports for the super-wide band high power TWT. It also describes dispersion characteristics of two types of helical slow-wave structures with different heights of lateral ribs of the metal holder of supports studied in 1,5 octave frequency band. The heat-scattering capability of the designed slow-wave structure was studied as well. The designed slow-wave structure was compared with other constructions.
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