2-PORT SCATTERING AT AN ELLIPTIC-WAVE-GUIDE JUNCTION

A concentric waveguide junction consisting of an elliptic waveguide ha s been formulated using the mode-matching method. The formulation is a generalized solution of the problem such that the second waveguide, w hich forms the junction, can be any regular shape in. cross section. E xact closed-form expressions for computing the coupling integrals have been obtained from the generalized formulation. As a special case of the general solution, the expressions for evaluating the coupling inte grals of rectangular-to-elliptic, circular-to-elliptic, and elliptic-t o-elliptic waveguide junction are given. Theoretical results compare w ell with the experimental and published results.