An antenna device includes a dielectric layer disposed on a ground plane; a first patch antenna pattern disposed on the dielectric layer; first and second feed vias feeding an RF signal to the first patch antenna pattern; a first feed pattern connected to the first feed via, and coupled to the first patch antenna pattern; and a second feed pattern connected to the second feed via and coupled to the first patch antenna pattern. The first patch antenna pattern includes a first edge in parallel with a first direction, and a second edge in parallel with a second direction. The first feed pattern is disposed near the second edge, the second feed pattern is disposed near the first edge, and a first width of the first feed pattern measured in a second direction is different from a second width of the second feed pattern measured in the first direction.