Scattering coefficients at a waveguidehorn junction
Abstract
Schwarz's iterative procedure of overlapping regions, which has been previously employed in the solution of polygonal waveguides and similar problems, is employed here to solve for the scattering matrix coefficients at the sharp junction of a sectoral and a parallelplate waveguide. It is shown that by dividing the junction into semiinfinite rectangular and sectoral subregions, and using the Green's functions of each, the problem is reduced to the solution of a system of integral equations of the Fredholm type. The scatteringmatrix coefficients are computed and presented graphically as a function of kb, together with the previously published data. The solution is relatively simple and the method is shown to be efficient since the fields are described in terms of rapidly convergent series (especially for a sectoral region of small flare angle), and accurate results are typically obtained after two or three iterations.
 Publication:

Institution of Electrical Engineers Proceedings
 Pub Date:
 February 1976
 Bibcode:
 1976IEEP..123..123I
 Keywords:

 Horns;
 Joints (Junctions);
 Microwave Scattering;
 Parallel Plates;
 Scattering Coefficients;
 Waveguides;
 Approximation;
 Fredholm Equations;
 Green'S Functions;
 Microwave Transmission;
 Propagation Modes;
 Reflectance;
 S Matrix Theory;
 Communications and Radar