Patent ID: 7403080

Claim:
A transmission line apparatus comprising: a substrate with a ground conductor plane; and a first signal strip and a second signal strip, which are supported on the substrate and arranged in parallel with each other, wherein the apparatus further includes at least one additional capacitance element that connects the first and second signal strips together, and wherein the at least one additional capacitance element includes: a first additional conductor that is arranged with a space left with respect to the first signal strip; a second additional conductor that is arranged with a space left with respect to the second signal strip; and a third additional conductor that is connected to the first additional conductor at a point and to the second additional conductor at another point, respectively, and wherein when measured in a signal transmission direction, a smallest width W 3 a of the third additional conductor is shorter than a length L 1 of the first additional conductor or a length L 2 of the second additional conductor, and wherein the at least one additional capacitance element has a resonant frequency that is higher than the frequency of a signal being transmitted.