Peculiarities of dispersion characteristics of sinusoidally rippled plasma waveguides with small ripple depth

摘要

Analytical expressions for the dispersion equations of E-waves of flat and cylindrical sinusoidal rippled plasma waveguides with super conducting walls in a strong external magnetic field are received. Origin of forbidden bands, which are formed at crossings of the dispersion curves describing various own modes, is investigated. The width of formed forbidden bands and group speeds of own waves near to the forbidden bands are determined. Comparison of the theory with results of the previous researches in special cases gives good qualitative and quantitative conformity.