Title :
Coaxial slowing down structure for hybrid UHF amplifier of range 1-3 GHz
Author :
Kornilov, E.A. ; Markov, P.I. ; Sotnikov, G.V.
Author_Institution :
Nat. Sci. Center, Kharkov Inst. of Phys. & Technol., Ukraine
Abstract :
The excitation by an electron beam of UHF oscillations in a coaxial slowing down transmission line with a comb on internal and external cylinders is considered. The analytical and numerical analysis of the received dispersion equation is carried out. The dependence of the gain on energy of an electron beam is investigated. It is shown, that the dependence of the gain on frequency has a maximum nearby the Cherenkov resonance of a beam with an eigen wave structure. Outside of a resonance the gain falls down under the linear law of reduction of frequency. The nonlinear theory of the UHF amplifier is constructed on the basis of the chosen slowing down structure. The maximal amplitude of a longitudinal electrical field, the efficiency of interaction and the optimum length of the structure are determined
Keywords :
Cherenkov radiation; UHF power amplifiers; UHF tubes; dispersion (wave); slow wave structures; 1 to 3 GHz; Cherenkov resonance; UHF oscillations; coaxial slow wave structure; comb; dispersion equation; eigenwave structure; electron beam energy; hybrid UHF amplifier; interaction efficiency; linear analysis; longitudinal electrical field; nonlinear theory; numerical analysis; optimum structure length of structure; Coaxial components; Ear; Electron beams; Equations; Frequency; Geometry; Magnetic fields; Numerical simulation; UHF propagation;
Conference_Titel :
Electronics and Radiophysics of Ultra-High Frequencies, 1999. International University Conference Proceedings
Conference_Location :
St Petersburg
Print_ISBN :
5-7422-0083-8
DOI :
10.1109/UHF.1999.787875
