NUMERICAL-SIMULATION OF REFLECTING STRUCTURES BY SOLUTION OF THE 2-DIMENSIONAL HELMHOLTZ-EQUATION

A method is described for modeling two-dimensional reflecting structur es based on a solution of the scalar Helmholtz equation. The equation is solved by use of an alternating-direction-implicit iterative method together with a semioptimum sequence of acceleration parameters simil ar to those introduced decades ago for the solution of elliptic equati ons with positive-definite operators. The resulting technique is effic ient and simple to program, permits the simulation of complex structur es with modest storage requirements, and is of very general applicabil ity.