Patent ID: 6815897
Filing Date: 2004-11-09
Classification: H01J

Abstract:
A magnetron comprising: an anode having resonant cavities and coaxially arranged with a cathode about a longitudinal axis; output means including a coaxial line configured to receive energy in one oscillator mode and transmit said one mode as a coaxial transmission mode and to receive energy in another oscillator mode and transmit said another mode as a cylindrical waveguide mode; and means for at least reducing transmission of energy along the coaxial line in the cylindrical waveguide mode wherein the coaxial line is arranged to receive energy coupled in an axial direction substantially parallel to the longitudinal axis from the resonant cavities; wherein the coaxial line has at least one axially extensive slot extending through an outer conductor through which energy in the cylindrical waveguide mode is coupled from the coaxial line.