A finite element boundary integral formulation using cavity Green´s function and spectral domain factorization for simulation of reverberation chambers

A finite element boundary integral approach with the Green´s function of the rectangular cavity is introduced and applied to the simulation of reverberation chambers. In contrast to all other approaches that use the cavity Green´s function, the computationally expensive part of the system matrix is factorized in the spectral domain yielding a significant acceleration of the algorithm. Numerical results demonstrating the performance and the accuracy of the approach are shown.