DocumentCode :
1021016
Title :
Transient response of a microwave beam amplifier
Author :
Bevensee, R.M.
Volume :
10
Issue :
5
fYear :
1963
fDate :
9/1/1963 12:00:00 AM
Firstpage :
329
Lastpage :
331
Abstract :
A model of a beam amplifier consisting of a chain of lightly-coupled cavities has been studied for initial time response with the aid of a computer. The beam flows through the center-holes of 20 cavities stacked together and coupled so the pass band width would be 5 per cent in an infinitely long chain. The intermediate cavities are externally loaded for stability. The electronic transit angle for each cavity is 3π/4, \\omega _{q}/\\omega = 0.1 , and the beam-circuit coupling coefficient CBis small. Computations have been made of the steady-state input resistance, gain and bandwidth around the 3π/4 "cold" circuit phase shift frequency, as well as of the transient response for t ≥ 0. Results show 1) at the 3π/4 frequency the voltage in the output cavity overshoots the steady-state value, and reaches its first peak at a time almost exactly equal to the amplifier length divided by the group velocity; 2) at a frequency nearer to cutoff, for which the group velocity is smaller, the voltage does not overshoot, but approaches the steady-state value asymptotically, such that at a time equal to the amplifier length divided by the group velocity the voltage has about 80 per cent of its steady-state value.
Keywords :
Coupling circuits; Cutoff frequency; Frequency conversion; Microwave amplifiers; Optical coupling; Stability; Steady-state; Time factors; Transient response; Voltage;
fLanguage :
English
Journal_Title :
Electron Devices, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9383
Type :
jour
DOI :
10.1109/T-ED.1963.15207
Filename :
1473510
Link To Document :
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