The effects of dielectric and metal loading on the dispersion characteristics for contrawound helix circuits used in high-power traveling-wave tubes

The theory developed by M. Chodorow and E.L. Chu (Stanford Univ. Tech. Rep. TR249, 1954) is expanded to include the problem of a contrawound helix interposed between two dielectric regions, symmetrically oriented inside a conducting cylinder. The single helix oriented in an identical fashion is simultaneously analyzed. Numerical results are presented in the form of dispersion diagrams over a wide range of parameters. Interesting behavior found within these diagrams is discussed and, whenever possible, comparable to experimental results.<
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