Electric lamp and discharge devices: systems – Cathode ray tube circuits – Combined cathode ray tube and circuit element structure
Patent
1993-07-30
1995-11-21
Lee, Benny T.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Combined cathode ray tube and circuit element structure
315 39, 333212, H01J 2340
Patent
active
054690226
ABSTRACT:
An extended interaction output circuit is provided for interacting with a modulated electron beam and for outputting RF electromagnetic energy. The circuit comprises a plurality of linearly disposed cavities having an axially extending beam tunnel to permit the traveling therethrough of the modulated electron beam as well as to couple electromagnetic energy between the successive cavities. Each of the cavities is separated by an annular disk having a hole providing the axial beam tunnel. The hole diameters increase in steps so that the impedance of the successive cavities decreases along the axial extent of the circuit. The diameter of the successive cavities is also increased as the associated width is decreased to maintain the same mid-band resonant frequency. The linearly disposed cavities act as an RF filter having successively tapered impedances to reduce reflections of the electromagnetic energy propagating through the circuit. The gap-to-gap distance between successive cavities is selected to provide a 90 degree phase shift of the beam in order to maintain synchronous operation between the beam and the wave at the mid band frequency.
REFERENCES:
patent: 3447019 (1969-05-01), Romiguiere
patent: 4496876 (1985-01-01), Young
patent: 4931695 (1990-06-01), Symons
patent: 5304942 (1994-04-01), Symons et al.
"The Theory of Disk-Loaded Wave Guides" by E. L. Chu and W. W. Hansen, Journal of Applied Physics, vol. 18, Nov. 1947, pp.: 996-1008.
"The Design of High-Power Traveling-Wave Tubes" by M. Chodorow and E. J. Nalos, Proceedings of the IRE, May 1956, pp.: 649-659.
Begum Syeda R.
Symons Robert S.
Lee Benny T.
Litton Systems Inc.
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