Design of coaxial cavity for high power magnetron

Abstract

This paper presents electromagnetic design of coaxial cavity for high power X-band coaxial magnetron. The initial dimensions of the cavity have been calculated by solving transcendental equation using graphical method. The eigenmode simulation has been carried out by using CST MW Studio. It is found that TE011 mode occurs at 9.3 GHz. Output coupler of cavity is designed to launch RF power into WR112. Proposed design is analyzed in terms of performance parameters i.e., unloaded, loaded, and external quality factors. Circuit efficiency and coupling coefficient are analyzed by varying critical geometrical parameters. Unloaded Q factor of 13108 is achieved for circuit efficiency of 93%.