UC Irvine

Diffraction effects on truncated periodic structures at the field operator level are examined. A physically-based approximate operator inverse of the electric field integral equation (EFIE) is used to either obtain an accurate first estimate of element currents, or as a preconditioner for a more rigorous, iterative solution. For illustration purposes, linear arrays of cylindrical elements are analyzed. The reduction in the matrix solution time that is achieved is shown. Furthermore, the physical insight into array truncation effects that the method provides is discussed.