Scattering coefficients of a dielectric taper in a rectangular waveguide

An exact approach is presented for calculating the scattering coefficients of a dielectric taper in a rectangular waveguide. The approach is based on the combination of the least-squares-boundary residual method (l.s.b.r.m.) and the Weissfloch-Feenberg method of measurement for a low-loss waveguide junction. An algorithm, based on the approach, has been developed which computes the scattering matrix of a dielectric taper. Typical results are presented for the taper with electric field parallel to the dielectric/air interface.