Propagation of modes in the corrugated waveguide made of the silicon carbide material

Abstract

The object under investigation is the corrugated SiC (Silicon carbide) waveguide in the operating frequency range 5–70 GHz at temperatures T = 1500°C, T = 1000°C and T = 20°C. The permittivity of this material is 8- i2, when T = 1500°C, 7-i, when T = 1000°C and 6- i0.5, when T = 20°C at the cutoff frequencies of the main modes. We have investigated the complex dispersion characteristics of the main modes propagated in these corrugated waveguides. It is the complicated electrodynamical problem. The analysis is made by the Singular Integral Equations' method. All the boundary conditions at the waveguide walls are satisfied including the edge conditions. The imaginary part of the permittivity could be very large. We discovered the particularity of main mode losses of corrugated waveguide.