Accelerating hybrid integral-equation and physical-optics solutions with MLFMA

We propose an algorithm for the solution of electromagnetic scattering and radiation problems by hybridizing integral-equation (IE) and physical-optics (PO) formulations. The goal is to combine the efficiency of PO solutions with the accuracy of IE solutions. The hybrid IE-PO method can provide fast and accurate solutions for problems involving electrically-large geometries with small details, such as the case of resonant antennas mounted on very large platforms that are hundreds/thousands of wavelengths in size.