Millimeter-wave antenna structure and millimeter-wave antenna module

A millimeter-wave antenna module, comprising:

• a circuit board;
• and
• a plurality of antenna structures disposed on the circuit board, wherein each of the plurality of antenna structures includes:
• a substrate assembly;
• a feeding opening structure and a feeding stripline each being disposed in the substrate assembly;
• wherein a portion of the feeding stripline is exposed in the feeding opening structure;
• and
• a shielding cover, wherein the feeding opening structure is covered by the shielding cover, a side of the shielding cover has an opening, and a height of the shielding cover is increased along a direction toward the opening;
• wherein the feeding stripline is configured to emit an electromagnetic wave signal in a single and horizontal direction through the feeding opening structure and the shielding cover;
• wherein the shielding cover includes:
• a shielding body having the opening;
• and
• two transverse extension plates extending from two opposite sides of the shielding body, wherein two projection regions defined by orthogonally projecting the two transverse extension plates onto the substrate assembly are parallel to each other.