Publishing house Radiotekhnika

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The problem about eigenmodes of a circular waveguide whose perfectly conducting wall is covered with a dielectric layer loaded with narrow longitudinal conducting strips is considered. The dispersion equation is obtained on the basis of the asymptotic strip boundary condition. A plot is presented allowing calculation of the layer thickness satisfying the hard wall boundary condition. A nymber of spe­cial cases and examples is considered, and it is also shown that the strip-line surface weres propagating without cut-off can exist in the waveguide for all the azimuth variations except for the axial symmetric case.



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