Cold cathode electron gun for microwave tube

Details Cold cathode electron gun for microwave tube Cold cathode electron gun for microwave tube

1998-03-25

2000-09-05

Lee, Benny T.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

315 5, 315 533, 313309, 313351, H01J 2534, H01J 2304

Patent

active

061148083

ABSTRACT:
A cold cathode electron gun includes a field emission cathode array type cold cathode for emitting electron beams toward an RF circuit unit of a microwave tube. An annular Wehnelt electrode, a first anode electrode and a second anode electrode are disposed in order from the field emission cathode array type cold cathode side coaxially with the field emission cathode array type cold cathode between the field emission cathode array type cold cathode and the RF circuit unit. The potential Ea1 of the first anode electrode, the potential Ea2 of the second anode electrode and the potential Eb of the RF circuit unit has a relationship of Ea1>Eb>EA2.gtoreq.0 V.

REFERENCES:
patent: 2842703 (1958-07-01), Preist
patent: 5604401 (1997-02-01), Makishima
A. S. Gilmour, Jr., "Principles of Traveling Wave Tubes", Artech House, pp. 432-433 and 440-441.

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