Title :
Effect of inhomogeneous dispersion shaping of a helical SWS on the backward-wave oscillation criterion
Author :
Seshadri, R. ; Rao, Prahlada ; Rao, K.V. ; Datta, Soumya Kanti ; Kamath, Sanmati ; Jain, P.K.
Author_Institution :
BE Complex, Microwave Tube R&D entre, Bangalore, India
Abstract :
The effect of inhomogeneous dispersion shaping of a helical SWS on the backward-wave has been studied. Theoretical simulations of three types of dispersion, namely, positive, flat and negative, achieved in an inhomogeneous structure and the interaction impedance characteristics thereof were carried out. The analysis of backward-wave oscillation criterion has been carried out to assess the effects of dispersion shaping and the beam-filling factor. A negative dispersion structure has been found to be advantageous in improving the threshold for backward wave oscillation.
Keywords :
backward wave oscillators; dispersion (wave); slow wave structures; backward-wave oscillation criterion; beam-filling factor; flat dispersion; helical slow-wave structures; inhomogeneous dispersion shaping; interaction impedance characteristics; negative dispersion structure; positive dispersion; Circuits; Dispersion; Electron tubes; Frequency; Impedance; Microwave devices; Optical coupling; Power system harmonics; Shape; Structural rods;
Conference_Titel :
Emerging Trends in Electronic and Photonic Devices & Systems, 2009. ELECTRO '09. International Conference on
Conference_Location :
Varanasi
Print_ISBN :
978-1-4244-4846-3
DOI :
10.1109/ELECTRO.2009.5441076
