Microwave output section of an internal magnet type magnetron

摘要

An internal magnet type magnetron is provided with a pair of permanent magnets which are disposed facing each other in a cylindrical envelope. In a space between the permanent magnets, a cathode is disposed around which a number of vanes extend radially. An output conductor is connected to one of the vanes and is extended through a space around one of the permanent magnets to an output section attached to the envelope. Most of the output conductor part passing through the space around one of the permanent magnets is enclosed by an outer metal tube. An inner tube having a length as large as 1/4 of harmonic wave lambda n is disposed in the outer metal tube. The inner and outer tubes are both electrically connected to the envelope.