Waveguide

A waveguide comprising:

• a dielectric layer;
• a first conductor layer laminated on the dielectric layer in a lamination direction of the dielectric layer;
• a second conductor layer laminated on the dielectric layer at a position different from the first conductor layer in the lamination direction;
• a plurality of first conductor vias that electrically connect the first conductor layer with the second conductor layer;
• and
• a connector that electrically connects two or more second conductor vias with each other, the two or more second conductor vias being provided in a vicinity of a specific location in which scattering of an electromagnetic wave occurs, the specific location being located in a waveguide portion through which the electromagnetic wave passes and which is surrounded by the first conductor layer, the second conductor layer, and the plurality of first conductor vias.
• (in a waveguide portion through which an electromagnetic wave passes and which is surrounded by the first conductor layer, the second conductor layer, and the plurality of first conductor vias, a connector that electrically connects two or more second conductor vias with each other, the two or more second conductor vias being provided in a vicinity of a specific location in which scattering of the electromagnetic wave occurs.)