NDLI: A method for the elimination of the spurious mode of backward-wave oscillations

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1955 International Electron Devices Meeting

A method for the elimination of the spurious mode of backward-wave oscillations

Content Provider	IEEE Xplore Digital Library
Author	Weglein, R.D.
Copyright Year	1957
Description	Author affiliation: Hughes Aircraft Co., Culver City, Calif. (Weglein, R.D.)
Abstract	For a given power output and voltage range, the minimum length of a backward-wave oscillator can be calculated from published data from any normal range of circuit loss and space charge regimes. As this circuit increases in length the rf oscillations become more insensitive to variations of beam current, but soon a point is reached where a new line appears in the spectrum at a slightly lower frequency. This new frequency corresponds to a second solution of the boundary value equation; and because the system is already in a state of oscillation, nonlinear mixing very rapidly fills the spectrum on either side of the main oscillation as the circuit length or the current is increased beyond that point. Thus, the optimum length of the circuit is a matter of compromise unless the starting current of the spurious mode can be appreciably increased or, as is indicated in this paper, can, in fact, be made infinite.
Starting Page	113
Ending Page	113
File Size	227168
Page Count	1
File Format	PDF
DOI	10.1109/IEDM.1957.187053
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1957-11-01
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radiofrequency amplifiers Frequency Couplers Tuning Noise figure Dynamic range Cities and towns Geometry Tunable circuits and devices Gaussian processes
Content Type	Text
Resource Type	Article

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