Title :
Effect of plasma and dielectric loading on the slow-wave properties of a traveling-wave tube
Author :
Mishra, Ganeswar ; Tripathi, Vipin K. ; Jain, V.K.
Author_Institution :
Dept. of Phys., Indian Inst. of Technol., New Delhi, India
fDate :
6/1/1990 12:00:00 AM
Abstract :
The dispersion characteristics of a helix-loaded traveling-wave tube (TWT) when a dielectric or plasma is introduced into the system are discussed. The dispersive properties of the dielectric-supported helix waveguide are examined for different geometric parameters of the helix waveguide. The dispersion relation of the helix mode is upshifted by ωp2 cos2 φ when plasma is introduced in the device, where ωp and φ are the electron plasma frequency and the pitch angle of the helix, respectively
Keywords :
dielectric-loaded waveguides; dispersion (wave); electromagnetic wave propagation in plasma; travelling-wave-tubes; waveguide theory; TWT; dielectric loading; dielectric-supported helix waveguide; dispersion characteristics; dispersion relation; dispersive properties; electron plasma frequency; geometric parameters; helix mode; helix pitch angles; helix-loaded traveling-wave tube; plasma loading; slow-wave properties; Dielectrics; Dispersion; Electromagnetic coupling; Electromagnetic propagation; Electromagnetic waveguides; Electron beams; Microwave devices; Plasma devices; Plasma properties; Plasma waves;
Journal_Title :
Electron Devices, IEEE Transactions on
