Parameters of a radiating slot cut into the wall of a nonreciprocal waveguide

Certain results of the theory of a radiating slot in a waveguide are extended to the case of a nonreciprocal waveguide. Relationships are derived for the elements of the scattering matrix of a nonreciprocal four-terminal network equivalent to the slot. The relationships were used to analyze a longitudinal slot in the narrow wall of a rectangular waveguide with a ferrite plate abutting the opposite wall. Dependences of the moduli of the reflection and transmission coefficients on the magnetization of the ferrite are presented.