ITERATIVE SOLUTIONS OF MFIE FOR COMPUTING ELECTROMAGNETIC SCATTERING OF LARGE OPEN-ENDED CAVITIES

The analysis of high-frequency scattering from electrically large open cavities is addressed in the paper. A magnetic-field integral equatio n (MFIE) for the equivalent currents on the interior cavity walls is o btained and solved by two different algorithms based on high-frequency principles of physical optics (PO). currents are known, Once the curr ents are known, the scattered field are obtained by using aperture int egration (Al) in the cavity mouth, or a reciprocity integral (RI) over a surface close to the termination. Numerical results are presented w hich demonstrate the accuracy of the proposed convergence and accuracy of the proposed methods, by comparison with modal reference solution.