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Traveling Wave Couplers for Longitudinal Beam Type Amplifiers

Gould, Roy W. (1958) Traveling Wave Couplers for Longitudinal Beam Type Amplifiers. Electron Tube and Microwave Laboratory Technical Report, 8. California Institute of Technology , Pasadena, CA. (Submitted)

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The equations governing traveling wave interaction between an electron beam and a slow wave circuit are formulated in terms of amplitudes of circuit mode and slow and fast space charge modes. The resulting equations are solved to find expressions for the matrix which relates the mode amplitudes at the output of the traveling wave coupler to the mode amplitudes at the input. The properties of this matrix are discussed and numerical values given for Kompfner Dip. Matrices for velocity jumps and drift regions are also given and the characteristics of couplers which are preceded by or followed by a drift region and velocity jump are discussed. It is shown that necessary and sufficient conditions for the removal of beam noise from the fast space charge wave by any lossless coupler are that, for a circuit input, there be no circuit output (M_(11) = 0) and no slow space charge wave output (M_(21) = 0). These results are then applied to the design of fast space charge wave couplers for longitudinal beam type parametric amplifiers.

Item Type:Report or Paper (Technical Report)
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Additional Information:The author wishes to express his sincere appreciation to Mr. D. C. Forster for several illuminating discussions of this problem and to Mr. K. Hebert for writing the program for machine computation of the matrix elements. Support for research on microwave electronics by the Office of Naval Research and for the investigation reported here by the Sperry Rand Corporation is gratefully acknowledged.
Group:Electron Tube and Microwave Laboratory
Funding AgencyGrant Number
Office of Naval Research (ONR)220(13)
Sperry Rand CorporationUNSPECIFIED
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Other Numbering System NameOther Numbering System ID
Electron Tube and Microwave Laboratory Technical Report8
Series Name:Electron Tube and Microwave Laboratory Technical Report
Issue or Number:8
Record Number:CaltechAUTHORS:20190222-101242334
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93180
Deposited By: Melissa Ray
Deposited On:25 Feb 2019 17:17
Last Modified:03 Oct 2019 20:51

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