NDLI: Traveling-wave tube devices with nonlinear dielectric elements

Content Provider	IEEE Xplore Digital Library
Author	Antonsen, T.M. Levush, B.
Copyright Year	1973
Abstract	The performance of traveling-wave tube (TWT) amplifiers incorporating nonlinear dielectric elements is studied via computer simulation. Two different situations are investigated: (1) the use of nonlinear dielectric elements to reduce intermodulation distortion and (2) the use of voltage-controlled dielectrics to provide rapid modification of the dispersion characteristics of the slow-wave structure. In the first case, the use of dielectrics with negative second-order susceptibilities is studied as a means of reducing phase and intermodulation distortion. Use of these dielectrics along with dynamic velocity taper to reduce amplitude modulation distortion results in marked reduction of predicted intermodulation distortion. In the second case, the goal is to design an amplifying structure whose gain as a function of frequency can be varied electrically. Preliminary design studies show that relatively large changes in the center frequency of the amplification band can be achieved with relatively modest changes in the dielectric constant of helix support structure.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	774
Ending Page	786
Page Count	13
File Size	378328
File Format	PDF
ISSN	00933813
Volume Number	26
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dielectric devices Nonlinear distortion Intermodulation distortion Frequency Predistortion Phase distortion Amplitude modulation Laboratories Signal processing Computer simulation
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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