The double interaction output cavity klystron

Abstract

By extracting the power from a bunched electron beam at 2 points along the beam instead of 1 and then combining these powers by suitable network connected to the load it is shown that bandwidth can be improved by a factor of 2, circuit losses per cavity can be reduced by a factor of 4, and power output can be increased by a factor of 4 or more if the output window is the limitation. Test results are given on an experimental tube of this kind delivering 50 KW at 825 Mc. The extension of this principle to more than 2 interaction spaces and its relationship to the extended type of klystron are discussed.