Simplified description of the field distribution in finlines and ridge waveguides and its application to the analysis of E-plane discontinuities

Using closed-form equations for the field distribution of the eigenmodes in ridge waveguides, a simplified analysis for ridge waveguide E-plane discontinuities is presented. The accuracy of the calculated results is checked by comparison with experimental results. Closed-form equations for the field distribution of the dominant hybrid mode in unilateral and bilateral finlines are also presented. The usefulness of these equations in calculating the characteristic impedance and in determining the plane of the circularly polarized magnetic field in unilateral finlines is demonstrated.>