An antenna apparatus may include: a feed line; a ground plane disposed around a portion of the feed line; a feed via electrically connected to the feed line; a first end-fire antenna pattern disposed in front of the ground plane to be spaced apart from the ground plane, and electrically connected to the feed via; a second end-fire antenna pattern electrically connected to the feed line and disposed farther forward than the first end-fire antenna pattern; and a third end-fire antenna pattern electrically connected to the feed via, and disposed in front of the first end-fire antenna pattern in such a manner that a portion of the third end-fire antenna pattern overlaps the second end-fire antenna pattern.