The invention discloses an angle logarithm folding groove
waveguide slow-
wave structure and relates to the field of electronic vacuum high-power devices and components. The structure includes two
metal cover plates which are in vertical mirror symmetry with each other; the
metal cover plates are connected with each other through
brazing, and each
metal cover plate includes a metal cavity, a
cathode emitter arranged on the metal cavity, a groove
waveguide etched in the metal cavity, an angular-directional electromagnetic wave channel groove etched in the groove
waveguide and end openings formedin both ends of the groove waveguide; the gaps between the upper portion and lower portion of each groove waveguide form radial
electron injection channels, and angle logarithm groove waveguides which have
high frequency bands and can substantially reduce
voltage are adopted as the groove waveguides. The angle logarithm folding groove waveguide slow-
wave structure solves the problems that when existing folding waveguides run at
high frequency bands, the interiors lose effects and devices and components cannot be miniaturized due to excessively high working
voltage. The effects of generating high-power electromagnetic
waves with terahertz wave bands, effectively reducing working
voltage of the electronic vacuum devices and components, reducing the sizes of corresponding devices and miniaturizing the electronic vacuum devices and components are achieved.