Efficient full-wave computation of radar cross section for multiple source locations

A novel technique is presented to solve the problem of computing the radar cross section for multiple source locations. The method uses the interpolative decomposition method to reduce the overall number of linear systems to be solved. In addition, the overlapping domain decomposition method is used to reduce the number of iterations required to solve each individual linear system. A modified MLFMA is applied to reduce the cost of each iteration of the ODDM. Results show very good agreement with measured data and suggest that the error incurred in using interpolative decomposition is negligible. However, a significant computational speed up is achieved with a saving of almost 88%.