The approximate modal interface—solution space projection method for efficient broadband full-wave analysis of multilayer interconnection structures

In this paper an enhancement to the previously reported approximate modal interface solution space projection (AMI-SSP) method is presented which is a combined domain decompostion-model order reduction method for efficient broadband full-wave analysis of multilayer printed circuits. With the AMI method, a multilayer circuit board can be analyzed layer by layer, which leads to a significant improvement in the computational efficiency. The method has been further combined with a multipoint model order reduction method, SSP, to achieve a fast frequency sweep. The AMI-SSP has been implemented with the finite-element method, which is well known for its excellent capability of analyzing complicated structures with arbitrary geometries and materials.