The Effects of a Transverse Anisotropy Dielectric Rod in Excitation and Amplification Phenomena of Hybrid Electromagnetic Waves in a Cylindrical Metallic Waveguide

In this paper, a novel waveguide made of a hollow long metallic cylindrical column with a transverse anisotropy dielectric rod (TADR) is studied. The dispersion relation of hybrid electromagnetic waves is obtained in this structure, and its diagram variations will be investigated. The effects of dielectric permittivity coefficients of TADR on the dispersion relation of slow waves is studied. The mechanism of wave generation and its amplification phenomena by a thin annular relativistic electron beam are investigated for hybrid modes. Also, the graphs of operating frequency and the graphs of growth rate will be presented for the waves during the electron beam injection. The computations have done for terahertz hybrid waves.