Modeling of lossy, enclosed rooms using MLFMA

MLFMA has been shown to be effective in modeling the fields within reverberation chambers of moderate size and low to moderate Q´s when using impedance boundary conditions to represent the chamber losses. The upper limit of the Q that is accurately modeled can be increased by reducing the error of the MLFMA. However, the iteration count needed to converge MLFMA dramatically increases with increasing Q, and ultimately limits the Q that can be efficiently modeled. Addressing this limitation will require the development of a preconditioner that treats the far-field as well as near-field interactions.