Antenna assembly and manufacturing method thereof, array antenna and manufacturing method thereof, and communication device

An antenna assembly, comprising:

• a first antenna array element configured to receive in a first frequency band;
• a second antenna array element configured to transmit in a second frequency band;
• and
• a filtering structure comprising at least one of a first filtering structure or a second filtering structure, wherein the first filtering structure is disposed on the first antenna array element, or the second filtering structure is disposed on the second antenna array element;
• wherein the second filtering structure comprises a short-circuit cavity, the second antenna array element is a patch antenna, and the patch antenna comprises an antenna body, a parasitic patch, and a second feeding unit;
• and
• one end of the second feeding unit is connected to the antenna body, an other end of the second feeding unit is connected to a power division network, the parasitic patch is located between the antenna body and a dipole antenna, and a gap exists between the parasitic patch and the antenna body, wherein the short-circuit cavity is disposed on a side of the parasitic patch away from the dipole antenna, and holes are provided on the parasitic patch and the antenna body, and a ground end of the first feeding unit in the first antenna array element is electrically connected to a ground end of the second feeding unit.