Multipoint moment matching model for multiport distributed interconnect networks

We provide a multipoint moment matching model for multiport distributed interconnect networks. We introduce a new concept: integrated congruence transform which can be applied to the partial differential equations of a distributed line and generate a passive finite order system as its model. Moreover, we also provide an efficient algorithm based on the L/sup 2/ Hilbert space theory so that exact moment matching at multiple points can be obtained.