Theoretical research on branch-guide energy coupler for wide bandwidth terahertz relativistic sheet electron beam TWTs

Abstract

Branch-guide energy couplers can be used in the terahertz relativistic sheet electron beam traveling wave tubes (THz-RSBTWT) for high and high frequency microwave radiations. To analyze this type of coupler, a new method based on the phase superposition principle was put forward in this paper. A physical model was developed, which is applicable no matter the coupler width is large or small. The general distance relationship between the branches was derived and a rapid design formula was obtained, which can help design energy coupler with arbitrary coupling coefficient.

Disclosure statement

No potential conflict of interest was reported by the author(s).