Patent ID: 7459987

Claim:
A network comprising: a first conductor plane and a second conductor plane; a substrate; and a ceramic intermediate layer that separates the first conductor plane and the second conductor plane, the ceramic intermediate layer comprising an interlayer contact; a transformation line formed in or on the substrate and having a predetermined electrical length, the transformation line comprising; a first part having a bent-over configuration, the first part being disposed in the first conductor plane; and a second part having a bent-over configuration, the second part being disposed in the second conductor plane, the second part being electrically connected to the first part by the interlayer contact; wherein the first and second parts of the transformation line comprise conductor segments that are straight and that are joined at right angles; wherein at least some of the conductor segments comprise parallel conductor segments disposed in the first and the second conductor planes, the parallel conductor segments at least partially overlapping and being capacitively coupled such that a resulting capacitive coupling is adjustable by adjusting overlap areas of the parallel conductor segments; and wherein widths of conductor segments in at least one of the first and second conductor planes are different and the widths are configured to compensate for cross-couplings between different segments, and to generate an impedance matching to an environment greater than about 25 dB.