Antenna device and communication module

An antenna device comprising:

• a dielectric block including a bottom surface,
• wherein the dielectric block includes
• a conductive ground member including an antenna ground surface inclined with respect to the bottom surface,
• a feed element that is disposed at a distance from the antenna ground surface, and constitutes a patch antenna together with the antenna ground surface,
• a feed line connected to a feed point of the feed element, and
• a dielectric member that supports the feed element with respect to the ground member and in which the feed element is embedded, wherein
• the ground member is exposed to the bottom surface, on both a lower side and a higher side of a contour line on the antenna ground surface passing through an intersection point of a perpendicular line drawn from the feed point to a virtual plane including the bottom surface and a plane including the antenna ground surface, by using the bottom surface as a height reference,
• wherein the antenna ground surface and a surface of the feed element are flat, and
• the bottom surface includes a stepped shape.

An antenna device comprising:

• a dielectric member including a bottom surface and a side surface;
• a conductive ground member that is provided at the dielectric member and includes an antenna ground surface inclined with respect to the bottom surface;
• a feed element that is embedded in the dielectric member, is disposed at a distance from the antenna ground surface, and constitutes a patch antenna together with the antenna ground surface;
• and
• a feed line connected to a feed point of the feed element,
• wherein the ground member is exposed to the bottom surface or the side surface, on both a lower side and a higher side of a contour line passing through an intersection point of a perpendicular line drawn from the feed point to a virtual plane including the bottom surface and a plane including the antenna ground surface, by using the bottom surface as a height reference,
• wherein the antenna ground surface and a surface of the feed element have stepped shapes, or are flat, and the bottom surface includes a stepped shape.