Patent ID: 9583809
Date: 2017-02-28
CPC Classifications: H01P,H05K

Claim:
1. An electronic device comprising a high-frequency signal line, the high-frequency signal line including: a body including a first layer level and a second layer level; a signal line including a plurality of first line portions provided at the first layer level, a plurality of second line portions provided at the second layer level, and a plurality of first interlayer connections connecting the plurality of first line portions and the plurality of second line portions to each other; a first ground conductor including a first ground portion provided at the first layer level and extending along the plurality of first line portions; a second ground conductor including a second ground portion provided at the second layer level and extending along the plurality of second line portions; and a second interlayer connection connecting the first ground portion and the second ground portion to each other; wherein a distance between each of the plurality of first interlayer connections and the second interlayer connection is not less than a maximum value of a distance between each of the plurality of first line portions and the first ground portion and is not less than a maximum value of a distance between each of the plurality of second line portions and the second ground portion such that a characteristic impedance of the plurality of first line portions and the plurality of second line portions is smaller than a characteristic impedance of the plurality of first interlayer connections and the second interlayer connection; intervals between the plurality of first interlayer connections are shorter than a half wavelength of a signal transmitted on the signal line; each of the plurality of first interlayer connections and the second interlayer connection includes a via-hole conductor; and a characteristic impedance at both ends of the high-frequency signal line is an intermediate value between (i) the characteristic impedance of the plurality of first line portions and the plurality of second line portions and (ii) a characteristic impedance of the via-hole conductors of the plurality of first interlayer connections and the second interlayer connection.