Parallel Hybrid Method of HOMoM–MLFMA for Analysis of Large Antenna Arrays on an Electrically Large Platform

摘要

The higher order method of moments (HOMoM) with a direct solver is hybridized with the multilevel fast multipole algorithm given the multiscale nature of airborne antenna arrays. The Poggio–Miller–Chang–Harrington–Wu formulation and the combined filed integral equation are solved for modeling metallic/dielectric antennas on a conducting platform. To accelerate the outer iteration between the two algorithms, the lower/upper decomposed matrix in HOMoM is reused and the initial values of current coefficients are properly set. Furthermore, a computational scheme based on the high-performance computing technique is designed to improve the hybrid method. A large model of a 2132-element microstrip array mounted on a 1020-wavelength airplane is accurately simulated.