| 摘要 |
A high-frequency transmission line includes: a dielectric substrate; a signal line formed on one surface of the dielectric substrate; a first and a second surface ground patterns formed so as to sandwich the signal line at a given distance from the signal line on the surface of the dielectric substrate; a backside surface ground pattern formed on another surface of the dielectric substrate; and a plurality of contacts penetrating the dielectric substrate for connecting the first and the second surface ground pattern to the backside surface ground pattern. In a given frequency range, the sum of the shortest distance from any point of the first and the second surface ground patterns to the nearest contact and the thickness of the dielectric substrate is shorter than ¼ of the effective wavelength of a transmission signal converted in the effective permittivity of the dielectric substrate.
|
