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Characteristics of traveling-wave tubes with periodic circuits

Gould, Roy W. (1958) Characteristics of traveling-wave tubes with periodic circuits. IRE Transactions on Electron Devices, 5 (3). pp. 186-195. ISSN 0096-2430. http://resolver.caltech.edu/CaltechAUTHORS:GOUireted58

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Abstract

An analysis of an electron beam which interacts with a chain of coupled resonators is presented. Several important characteristics of traveling-wave tubes which employ periodic slow-wave circuits are described. It is found that, even for a lossless circuit, the gain does not become large near either pass band edge although the interaction impedance does become very large. Furthermore, useful amplification is found to occur outside the normal circuit pass band, particularly when the frequency is below the low-frequency cutoff where the circuit presents an inductive reactance to the beam. The problem of matching uniform transmission lines to the periodic circuit is discussed from the equivalent circuit point of view and it is shown that the terminating impedance which produces no reflection from the output end of the circuit when the beam is present may be appreciably different from that required when the beam is absent. The method of analysis applies to spatial harmonic operation, including backward spatial harmonics, as well as to synchronously tuned multicavity klystrons.


Item Type:Article
Additional Information:© Copyright 1958 IEEE. Reprinted with permission. Manuscript received by the PGED, November 11, 1957. This work was done while the author was at the Hughes Res. and Dev. Labs., Culver City, Calif. It is a pleasure to acknowledge the interest and suggestions of members of the Electron Tube Laboratory of the Hughes Research and Development Laboratories, particularly L.M. Field and S. Sensiper. The numerical results were obtained by E.A. Mazzari and J. Pochares, of the Hughes Systems Analysis Laboratory, using an IBM 650 digital computer. The author is deeply grateful for their considerable contribution to this study.
Record Number:CaltechAUTHORS:GOUireted58
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:GOUireted58
Alternative URL:http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=31558&arnumber=1472462&count=16&index=13
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ID Code:9820
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Deposited On:19 Mar 2008
Last Modified:26 Dec 2012 09:53

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