Nec Corporation

Nec Microwave Tube, Ltd.

Wako Suzuki

Takeshi Nobe

Shunji Tsuida

A collector of a traveling wave tube in which a larger quantity of loss ceramic members are arranged between an outer collector enclosure and an outer surface of a collector electrode for increasing high frequency loss to prevent RF leakage from the collector lead wire. The collector includes a collector electrode heat conductive columnar ceramic elements an outer collector enclosure for maintaining vacuum and loss ceramic members arranged between the outer surface of the collector electrode and the inner surface of the outer collector enclosure

Collector structure of traveling wave tube having a lossy ceramic member

A collector of a traveling wave tube in which a larger quantity of loss ceramic members are arranged between an outer collector enclosure and an outer surface of a collector electrode for increasing high frequency loss to prevent RF leakage from the collector lead wire. The collector includes a collector electrode,, heat conductive columnar ceramic elements,, an outer collector enclosure,for maintaining vacuum and loss ceramic members,arranged between the outer surface of the collector electrode,and the inner surface of the outer collector enclosure

Collector structure having a loss ceramic member

A multiplecavity klystron, which has a wide range of frequencies in which it can be used and is capable of operating at high frequencies, comprises first and second resonant cavities. At least one of resonant frequencies in TEM and TE11 modes of the second resonant cavity is lower than the operating frequency of the first resonant cavity, and the other of resonant frequencies in TEM and TE11 modes of the second resonant cavity is different from the operating frequency of the first resonant cavity.

Multiple cavity klystron

A simply structured cavity resonator for a multi-cavity klystron which can position a movable tuning element at a location where the element should be located with respect to a widthwise direction of the element. The cavity resonator of the multi-cavity klystron includes a cavity envelope, and a movable tuning element slidable on upper and lower internal surfaces of the cavity envelope. Each of left and right internal surfaces of the cavity envelope have continuously formed first and second areas. A spacing between the first areas of the left and right internal surfaces of the cavity envelope is equal to a width of the movable tuning element, while a spacing between the second areas of the left and right internal surfaces of the cavity envelope is larger than the width of the movable tuning element. The second areas correspond go an available frequency band.

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Tokyo, Japan

Wako Suzuki