Abstract
Properties of the dielectrically loaded ‚ensitron‘ slow-wave structure (SWS) for travelling-wave maser (TWM) applications are investigated in some detail. Approximating the parallel conductors by a sheath with an infinite conductivity along the conductors and zero conductivity perpendicular to them, the field components and dispersion characteristics of the SWS have been derived. The influence of the (isotropic) dielectric constant of the maser material on the group velocity, the phase-filling factor and the field polarization (essential for the calculation of the gain and. the isolation) has been studied. In particular, attention has been paid to these properties for the important frequency which yields the minimum Blowing factor. It is shown that the present SWS has favourable properties compared to other SWS‚ s (e.g. the comb-structure and the dielectrically filled waveguide). Also a high filling factor is obtained. Such an easitron may easily be fabricated using photo-etching techniques and is therefo...
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