Title :
Analysis of a Disc-Loaded-Coaxial Waveguide for Wideband and High-Gain Gyro-TWTs
Author :
Kesari, Vishal ; Jain, P.K. ; Basu, B.N.
Author_Institution :
Dept. of Electron. Eng., Banaras Hindu Univ., Varanasi
Abstract :
Field-matching technique was used to analyse a disc-loaded-coaxial waveguide in the azimuthally symmetric TE modes for its dispersion relation that includes space-harmonics in the disc-free region as well as modal-harmonics in the disc-occupied region of the structure. The phase propagation constant, obtainable from the dispersion relation, was fed back in the small-signal gain-equation of the gyro-TWT and the gain-frequency response of a disc-loaded-coaxial gyro-TWT was plotted. Further, the effect of the radius of coaxial rod insert on gain-frequency response has been studied, and the parameter has been optimised for high gain and wideband of the device.
Keywords :
coaxial waveguides; frequency response; travelling wave tubes; azimuthally symmetric TE modes; disc-loaded-coaxial waveguide; dispersion relation; field-matching technique; gain-frequency response; high-gain gyro-TWT; phase propagation constant; small-signal gain-equation; Bandwidth; Coaxial components; Costs; Dispersion; Electron tubes; Microwave theory and techniques; Plasma devices; Plasma waves; Propagation constant; Wideband;
Conference_Titel :
Antennas, Propagation & EM Theory, 2006. ISAPE '06. 7th International Symposium on
Conference_Location :
Guilin
Print_ISBN :
1-4244-0162-3
Electronic_ISBN :
1-4244-0163-1
DOI :
10.1109/ISAPE.2006.353311
