A parallel plate wave-guide structure in a layered flexible/formable medium for transmitting complementary signals, including: at least two parallel signal conductor plates, placed in substantially close proximity, separated by a conductor-to-conductor dielectric material, and having a controlled impedance contained between the at least two parallel complementary signal conductor plates dominated by odd mode propagation of transverse wave components between the at least two parallel complementary signal conductor plates; at least two parallel reference plates forming a parallel plate reference system parallel to and surrounding the at least two parallel complementary signal conductor plates; dielectric materials that are contained between each of the at least two parallel complementary signal conductor plates and a corresponding parallel reference plate; a partial rectangular wave-guide structure comprised of the parallel plate reference system, such that each of the at least two parallel reference plates are electrically interconnected periodically.