Patent ID: 11949144
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A transmission line substrate comprising:
a line portion;
a connecting portion;
a base material including a main surface and a plurality of base material layers stacked on each other;
a first ground conductor on at least one of the base material layers;
a second ground conductor on at least one of the base material layers;
a signal line on at least one of the base material layers;
an external electrode of the connecting portion, the external electrode being on the main surface of the base material; and
a plurality of interlayer connection conductors in the base material; wherein
in the line portion, a transmission line having a strip line structure including the signal line, the first ground conductor, and the second ground conductor is provided;
the connecting portion includes a facing portion in which the signal line and the external electrode face each other in a stacking direction in which the plurality of base material layers are stacked on each other, without interposing an interlayer connection conductor therebetween;
the plurality of interlayer connection conductors include a plurality of first interlayer connection conductors and a plurality of second interlayer connection conductors that electrically connect the first ground conductor and the second ground conductor;
the plurality of first interlayer connection conductors are provided at the line portion, and, when viewed in the stacking direction, are provided along the signal line;
the plurality of second interlayer connection conductors are provided at the connecting portion, and surround the facing portion;
a portion of the plurality of second interlayer connection conductors is provided in at least one of the plurality of base material layers provided between a portion of the signal line and the external electrode, the portion of the signal line facing the external electrode; and
an interval of the plurality of second interlayer connection conductors is smaller than an interval of the plurality of first interlayer connection conductors.