ABSTRACT
In this chapter, the authors derive and follow up with a number of applications, including the orthogonality of waveguide modes and the approximate calculation of waveguide losses. It should be noted that only the transverse components of and enter into the orthogonality relation. Thus, they develop an approximate method to determine the effect of wall losses on the propagation coefficient by assuming that the fields are very nearly what they would be if the walls were perfectly conducting. The effect of wall losses due to finite conductivity of the boundary is not so easy to account for as that of dielectric losses. If they were to let the walls be treated as a finitely conducting medium, the waveguide would no longer be electrically homogeneous, and any simplifications which were possible in the case of ideal walls will be lost.
