Multi-Beam Velocity-Type Frequency Multiplier

One of the limitations imposed upon a conventional frequency multiplier using a double-cavity klystron is the restriction of rf output caused by the mutual repulsion of electrons. To overcome this difficulty a multibeam velocity-type frequency multiplier was proposed by the author, and theoretical and experimental investigations were made. Another type of multibeam frequency multiplier has been proposed by R. Kompfner, but as far as the author is aware, this tube has not yet been fully examined experimentally nor theoretically because of the complexity of the physical structure. Experiments made on a tentative model of the proposed frequency multiplier with two electron beams disclosed that much higher output power compared with conventional klystron multipliers could be derived. It is believed that the new tube is promising in providing a novel means of generating microwave signals of multiplied frequencies.