Antenna apparatus and antenna module

An antenna apparatus comprising:

• a ground layer comprising a through-hole;
• a feed via disposed to pass through the through-hole;
• a patch antenna pattern disposed on the ground layer and electrically connected to one end of the feed via;
• a first coupling patch pattern disposed on the patch antenna pattern;
• a second coupling patch pattern disposed between the first coupling patch pattern and the patch antenna pattern;
• a dielectric layer disposed in at least of a portion a space between the first coupling patch pattern and the second coupling patch pattern so that a dielectric constant of at least a portion of a space between the patch antenna pattern and the second coupling patch pattern is lower than a dielectric constant of the space between the first coupling patch portion and the second coupling patch pattern;
• and
• conductive array patterns arranged to surround the first coupling patch pattern or the second coupling patch pattern along a side boundary of the first coupling patch pattern or the second coupling patch pattern and comprising at least a portion disposed in the dielectric layer.