A method for solving boundary value problems associated with a class of doubly modified wiener-hopf structures

This letter describes a method for analyzing a class of boundary value problems involving cascaded discontinuities in a waveguide. It is shown that problems involving a pair of junctions can be conveniently formulated in terms of a special type of infinite set of equations which can be attacked by an extension of the modified residue calculus method, previously developed in connection with single discontinuity problems. The principal advantage of this approach is its numerical efficiency.