HIGH-FREQUENCY TRANSMISSION LINE

摘要

Provided is a narrow and thin high-frequency transmission line which transmits each of a plurality of high-frequency signals with low loss while comprising a plurality of high-frequency signal lines which respectively transmit the plurality of high-frequency signals with different signal strengths. A first signal line is not prone to incur crosstalk with a second signal line, by being positioned closer than the second signal line to a second ground conductor. With a plurality of first aperture parts being disposed in the second ground conductor, the high-frequency transmission line reduces capacitive coupling between the first signal line and the second ground conductor. As a result, a transmission line including the first signal line offsets an increased capacitance from an increased line width of the first signal line with a reduction in the capacitance from the distance to the first ground conductor and the plurality of first aperture parts. Moreover, it is unnecessary for the high-frequency transmission line to be wide overall. In addition, the capacitance is reduced by the first aperture parts and second aperture parts, and thus, it is possible to shorten the respective distances from the first signal line and the second signal line to the first ground conductor.