| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a transmission line having a good high-frequency characteristic and being mountable in high density in a transmission line structure accompanied by a GND via sequence near a signal line. <P>SOLUTION: The transmission line includes: a dielectric substrate 1; a signal line 2 provided inside the dielectric substrate 1; a grounded conductors 3a, 3b provided on upper and lower faces of the dielectric substrate; and a GND via 4 provided to penetrate the dielectric substrate for electrically connecting between the grounded conductors. A plurality of GND vias 4 are arranged along a longitudinal direction of the signal line in a position with equal distances to the signal line, and a distance between the GND vias is adjusted so that reflected waves caused by coupling of the signal line and the GND vias are canceled with a first frequency of a transmitted signal. <P>COPYRIGHT: (C)2010,JPO&INPIT |
