Electric lamp and discharge devices: systems – Cathode ray tube circuits – Combined cathode ray tube and circuit element structure
Patent
1984-06-20
1986-08-05
Chatmon, Saxfield
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Combined cathode ray tube and circuit element structure
333 24R, 333230, 372 2, 315 5, 315 529, 315 531, 315 39, 330 45, H01J 2500
Patent
active
046045511
ABSTRACT:
A cyclotron resonance maser system includes coaxial coupling between coaxial wave guides. Such coupling is provided between an outer coaxial waveguide through which a gyrotron electron beam passes in generating or amplifying microwaves and an inner coaxial waveguide terminating in an annular window. The coupling separates the microwaves from the electron beam before the collector region of the gyrotron so that the collector dimensions are not related to, and hence restricted by, the wavelength of the output microwaves. The particular preferred coupling includes substantially axial slots in the common wall between the respective waveguides which slots provide selective coupling between the waveguides in the desired modes and limiting mode conversion. The coupling is preferably between a TE.sub.On or TE.sub.ml mode in the outer input waveguide and a TE.sub.On' mode in the inner, output waveguide, n and n' being integers greater than 1. A preferred resonant cavity limits the generated microwaves to a TE.sub.ml mode. Partial reflection and feedback from the inner waveguide stabilizes the input mode.
REFERENCES:
patent: 4434387 (1984-02-01), MacMaster et al.
patent: 4496876 (1985-01-01), Young
patent: 4523127 (1985-06-01), Moeller
Bekefi, G., "Rippled-Field Magnetron," Appl. Phys. Lett., vol. 40, No. 7, 1 Apr. 1982, pp. 578-580.
Chatmon Saxfield
GA Technologies Inc.
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