This is a companion paper to two other papers, one of which developed an approximate, closed-form solution of the Stratton-Chu vectorial integral equation for irregular boundaries. That development involved the evaluation of several integrals by the stationary phase method and assumed that the points of stationary phase were well separated. A second paper presented the correction factor for definite integrals that are evaluated by the stationary phase method. Here, this correction factor is incorporated as a weighting function to permit a superposition of the closed-form solutions for irregular screens or apertures without limitation on the spacing between adjacent points of stationary phase. This extended solution is then applied to evaluate the diffraction effects for a bilinear screen and compared with experimental data.
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