Patent ID: 6777877
Filing Date: 2004-08-17
Classification: H01J

Abstract:
A high power output vacuum electron device comprising:a cathode for emitting a supply of electrons, an anode for attracting said electrons, said anode having a configuration to allow said electrons to pass through said anode, an RF generator circuit in the path of said electron beam for generating RF signal energy in the presence of a high-voltage power source, a magnet including a magnet pole piece surrounding said anode and said RF generation circuit for focusing said electrons into a collimated beam, and a collector for receiving the collimated electron beam and for returning the electrons to the cathode, said collector is a multi-stage depressed collector which is shielded provided by the magnetic field from said magnet, wherein said magnet includes no magnet pole piece in the vicinity of a region of, said collector, a magnetic material surrounding the collector region being disposed such that substantially no magnetic field reversal is present at the collector region.