Computer simulation of the helix traveling-wave amplifier with harmonic signals

Both fundamental and second-harmonic output powers have been computed with an axially symmetric three-dimensional model of a helix traveling-wave amplifier. They agree reasonably well with measurements. For three beam power levels, the computed transfer curves show RF drive powers consistently about...

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Vydané v:IEEE electron device letters Ročník 1; číslo 6; s. 104 - 106
Hlavný autor: MacGregor, D.M.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: IEEE 01.06.1980
Predmet:
Computer simulation
Equations
Power amplifiers
Power generation
Power measurement
Power transmission lines
Radio frequency
Radiofrequency amplifiers
RF signals
Voltage
ISSN:0741-3106
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Popis
Shrnutí:Both fundamental and second-harmonic output powers have been computed with an axially symmetric three-dimensional model of a helix traveling-wave amplifier. They agree reasonably well with measurements. For three beam power levels, the computed transfer curves show RF drive powers consistently about 3 dB below the measured powers and saturated output powers about 2 dB below the measured values. Inaccuracies in the assumed initial beam radius, density and velocity may have caused these differences. Suppressing the second harmonic raises the computed fundamental output power by 3 dB. The model accurately reproduces a measured 11 dB dip in the second harmonic as the fundamental signal saturates.
Bibliografia:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0741-3106
DOI:10.1109/EDL.1980.25247