The main design options for supplying SHF energy to the end wall of a cylindrical resonator were considered. 2 types of designs for coaxial feed of energy were selected and optimized, differing in the location of the coaxial line relative to the required direction of wave propagation. As a result of the calculations, the electric fields inside the cylindrical chamber and in the horn coaxial antennas were found, and the SWR of the systems was determined. A comparison in distribution of the electric field when metal objects were placed in the chamber was carried out. The areas of occurrence of a plasma SHF discharge on the surface of a cylindrical object were shown.