Absorption dependencies of dipolar glass cylindrical waveguide coated by SiC on temperatures and coated layer thicknesses

Abstract

We have electrodynamically rigorously investigated the open (wihout metal screen) layered dipolar glass-silicon carbide (SiC) waveguides. Our electrodynamical modeling was carried out by the partial area method with using of the Muller's method for the searching of complex propagation constants of waveguide modes. We used our developed computer code in the MATLAB language. The investigated waveguides quality by the very large broadband widths and special mode attenuation properties in the microwave frequency range 5-100 HGz. Here we present the phase and attenuation constants of the main mode and the two higher modes of layered lossy waveguides with the external waveguide radius equal to 3 mm at three thiknesses t of coated layer SiC and the temperature T equals to 130 K or 150 K. Here are also given the waveguide brodband widths and the cutoff frequency fcut of modes at different values T and thiknesses t.