2.1 Dielectric-loaded circular waveguide

In this section, we will explore two variants of dielectric-loaded structure: (i) the circular waveguide with dielectric lining on metal wall (Figure 2), and (ii) the circular waveguide with dielectric coaxial insert (Figure 3) for their dispersion characteristics and the tailoring of these characteristics with change of the relative permittivity of the dielectric material.
