Solving moment method problems by partitioning

Efficient solutions of electromagnetic field problems are more and more needed as numerical methods are increasingly applied. A partitioning of the method of moments (MoM) matrix allows one to efficiently apply the MoM to several special classes of problems. The first class is an optimization problem where small parts of a big system have to be tuned, whereas the bigger part remains constant. The second class are problems too big to fit into the computer´s memory. There, the partitioning allows one to efficiently use internal and external memories and to minimize data transfer between the two. After an outline of the method two numerical examples are presented. The first is the optimization of an antenna on top of a handset, the second is a very large electromagnetic problem which does not fit into the computers memory.