We study a waveguide with layered-periodic walls for different relations between the dielectric permittivities of the central (guiding) layer and the superlattice layers. We consider guided propagation in such a waveguide, predict the appearance of surface waves in the guiding layer, and discuss the case where almost all energy is transferred in the periodic walls.

_ We have investigated the dissipation influence on the electromagnetic properties of the semiconductor superlattice in the magnetic field. The features and differences of the zone spectrum are researched for two types of the ratios of characteristic semiconductor frequency ( H P Z Z and H P Z Z ! ). We have shown that taking dissipation into account gives rise to the occurrence of the turning of the dispersion curves for the electromagnetic waves propagating in such structures. It is find that one of the band edges in the collective cyclotron waves region is degenerate for big collision frequency value, the zone "destruction" takes place. We also have obtained that when H P Z Z ! the zones appear where the attenuation is very small. It is connected with the fact that in this case the energy value transferred in the dielectric layer is more than that in the semiconductor layer.

Transmission properties of the periodic ferrite-dielectric structure interfaced with the semiconductor layer placed into the external magnetic field are investigated in the paper. We analyze cases of TM-and TE-polarized waves. Possibility of control of peaks location in transmission spectrum by changing magnitude of the external magnetic field was demonstrated.