Accurate wideband evaluation of the shielding effectiveness of complex enclosures using an asynchronous parallel NSPWMLFMA

We present the application of the non-directive stable plane wave multilevel fast multipole algorithm (NSPWMLFMA) to the simulation of the shielding effectiveness of enclosures with complex fillings. The method is parallelized with an asynchronous algorithm in order to allow highly efficient simulations in an inexpensive GRID computing environment. The whole method is fully error controlled. Further increased efficiency is obtained by using Block-Jacobi preconditioners, splay trees (STs) to extract symmetries in the geometry and careful evaluation of self-patch and neighbor-patch integrals. Numerical examples of enclosures with and without equipment illustrate the method. We will also focus on the use of lossy materials to increase the shielding efficiency of metal enclosures around resonance frequencies.