Patent ID: 9647315
Date: 2017-05-09
CPC Classifications: H01P

Claim:
1. A directional coupler comprising: a multilayer structure comprising a plurality of dielectric layers being stacked, the plurality of dielectric layers including a first dielectric layer and a second dielectric layer; a main line including a first main line portion and a second main line portion, the first main line portion and the second main line portion being electrically connected in series to each other; and a sub line that is electromagnetically coupled with the main line along a stacking direction, the sub line including a first sub line portion and a second sub line portion, the first sub line portion and the second sub line portion being electrically connected in series to each other; wherein the first main line portion and the first sub line portion are provided on the first dielectric layer, the second main line portion and the second sub line portion are provided on the second dielectric layer, and in a planar view along the stacking direction, the first main line portion and the second sub line portion overlap one another, and the first sub line portion and the second main line portion overlap one another.