Eigenmodes of coupled perfectly conducting cylindrical wires in a multilayered dielectric medium

A full-wave analysis of coupled wire lines in a multilayered dielectric medium is presented. The propagation constants of the lowest-order eigenmodes associated with the coupled wires are determined first. In a second step, special emphasis is placed on the determination of the impedances of these modes and their frequency dependence. To this end it is necessary to determine the total complex power propagated by each mode. A numerical example is considered.<>