Document Type and Number:
Japanese Patent JPH0437536
Kind Code:
B2
Abstract:
An electron-beam tube for generating high microwave power at high frequencies comprises a fast-wave circuit such as a hollow waveguide. The circuit wave has a component of electric field perpendicular to its propagation axis. This field interacts with motions of the electrons transverse to the axis, in particular cyclotron rotation in an axial magnetic field. The above features are common to the well-known "gyrotrons". In the inventive tube the fast-wave circuit has means for locking a linearly polarized transverse-electric mode to the orientation of a circuit member such as the ridge in a ridged waveguide. The member (ridge) rotates spirally with distance along the guide. The added periodicity permits interaction with a space harmonic of the circuit wave. The -1 harmonic has a dispersion characteristic which provides beam-wave interaction over a wider frequency range than is possible in prior-art tubes of the gyrotron type.
Inventors:
MAABIN KODOROO
Application Number:
JP9262883A
Publication Date:
June 19, 1992
Filing Date:
May 27, 1983
Export Citation:
Assignee:
VARIAN ASSOCIATES
International Classes:
H01J23/16; H01J25/00; H01J25/38
Next Patent: JPH0437537