Analysis of mode excitation of a relativistic magnetron with azimuthal-periodic-cavity extraction

Relativistic magnetron (RM) with all cavity-magnetron axial extraction (ACMAE) has attracted much attention, benefiting from its good performance. In this paper, RM ACMAE is generalized to a general case called azimuthal-periodic-cavity due the introduction of two structure parameters R and S, where indicates number cavities between in coupling waveguide S adjacent waveguides. The necessary conditions for mode excitation are theoretically investigated verified by simulations. Using expression conditions, one can easily figure out output components theory according structural electron spokes. This new technique provides more solving schemes different structures designing high performance RMs advantages applications power microwave.