Antenna structure and single dual-polarization antenna array

A single dual-polarization antenna array, comprising:

• at least one antenna group, each of the at least one antenna group comprising:
• a first antenna structure and a second antenna structure, each of the first antenna structure and the second antenna structure comprising:
• a ground;
• a first patch, arranged spaced apart from the ground, wherein the first patch comprises a circular slit, a main patch portion, and a circular portion, the circular portion and the circular slit surround the main patch portion, and the circular slit is located between the main patch portion and the circular portion;
• a second patch, arranged spaced apart from the ground and the main patch portion, and located between the ground and the main patch portion, wherein a dimension of the second patch is less than a dimension of the main patch portion;
• a first conductive post, wherein one end of the first conductive post is connected to the second patch, and another end of the first conductive post passes through the ground and is coupled to a signal feeding end;
• and
• a second conductive post, connecting the circular portion to the ground;
• wherein the first antenna structure is connected to the second antenna structure in a first direction, and the first patch of the first antenna structure and the first patch of the second antenna structure are located on a same plane and disposed perpendicularly to each other on the plane.