Dielectric loaded waveguides-a review of theoretical solutions. Part 2: Propagation through dielectric loaded waveguides

The paper presents an analytical survey of the propagation characteristics of microwaves through (i) dielectric loaded waveguides, such as parallel plane, rectangular, circularly cylindrical and coaxial guides filled inhomogeneously with one or two dielectrics; (ii) imperfect waveguides filled with imperfect dielectrics. The problem of the existence of backward waves in a circular cylindrical waveguide containing a concentric dielectric rod of smaller radius than the guide and the representation of equivalent circuit of a waveguide containing a dielectric post has also been discussed. A brief review of the theory of dielectrics has been included in the appendix.