Directional coupler

A directional coupler comprising:

• a multilayer body comprising a first insulating layer with a first main surface and a second insulating layer arranged facing the first main surface;
• a linear first conductor arranged in the first insulating layer;
• and
• a second conductor that is arranged on a side of the second insulating layer opposite the first insulating layer, that runs parallel to the first conductor in a plan view of the multilayer body, and that is electromagnetically coupled to the first conductor,
• wherein the second conductor has:
• a third portion and a fourth portion that extend parallel to each other in a parallel running direction, and that are arranged with a space therebetween in a direction orthogonal to the parallel running direction,
• a first connection portion that connects a first end portion of the third portion to a first end portion of the fourth portion, and
• a second connection portion that connects a second end portion of the third portion to a second end portion of the fourth portion, and
• wherein in the plan view of the multilayer body, the first conductor is arranged between the third portion and the fourth portion.

A directional coupler comprising:

• a multilayer body comprising a first insulating layer with a first main surface and a second insulating layer arranged facing the first main surface;
• a linear first conductor arranged in the first insulating layer;
• and
• a second conductor that is arranged on a side of the second insulating layer opposite the first insulating layer, that runs parallel to the first conductor, and that is electromagnetically coupled to the first conductor,
• wherein the first conductor and the second conductor each have a winding shape,
• wherein the second conductor has a fifth portion and a sixth portion that extend in a same direction and that are arranged to have, between the fifth portion and the sixth portion, a central aperture of the winding shape,
• wherein when the multilayer body is viewed in a plan view, a position of the fifth portion with respect to a central axis of the first conductor in the extending direction thereof in a portion where the fifth portion and the first conductor run parallel to each other is the same as a position of the sixth portion with respect to a central axis of the first conductor in the extending direction thereof in a portion where the sixth portion and the first conductor run parallel to each other, and
• wherein the fifth portion comprises two parallel members and the sixth portion comprises two parallel members, the parallel members of the sixth portion being between the parallel members of the fifth portion.