Electron beam tubes

Details Electron beam tubes Electron beam tubes

H - Electricity

01

J

H01J 25/02 (2006.01) H01J 23/15 (2006.01) H01J 23/54 (2006.01) H01J 25/04 (2006.01)

Patent

CA 2296831

In an electron beam tube arrangement, such as an IOT amplifier, an input cavity 5 surrounds an electron gun 1. The cavity 5 includes parts which are at high and low relative electrical potentials. These are separated by RF chokes 16 and 17 to provide do isolation whilst acting as a short circuit to high frequency radiation coupled into the cavity 5. The arrangement also includes a bypass capacitor 26 located behind the electron gun 1 which short circuits stray or leakage radiation to prevent deterioration of the amplified signal. The bypass capacitor 26 presents a distributed capacitance of low inductance. In one embodiment, the RF choke 16 and bypass capacitor 26 include insulating material defined by a common member 18 on which metallisation layers are deposited.

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