Patch antenna and antenna array

A patch antenna comprising:

• a first substrate, a second substrate and a substrate module that are stacked from top to bottom;
• a driving radiative element disposed on a lower surface of said second substrate;
• a parasitic radiative element disposed on an upper surface of said first substrate;
• a first feed-in line and a second feed-in line that are disposed on a lower surface of said substrate module;
• and
• a first feed-out probe and a second feed-out probe, each of which extends from a lower surface of said driving radiative element from top to bottom, and penetrates said substrate module, said first feed-out probe being electrically connected to said first feed-in line, and said second feed-out probe being electrically connected to said second feed-in line;
• wherein in response to said driving radiative element receiving an input electromagnetic wave, a portion of the input electromagnetic wave is sequentially received by said first feed-out probe and said first feed-in line, and another portion of the input electromagnetic wave is sequentially received by said second feed-out probe and said second feed-in line,
• wherein said driving radiative element includes a driving patch and four driving stubs, two centers respectively of two of said driving stubs are aligned with a center of said driving patch in an X-direction, and two centers respectively of another two of said driving stubs are aligned with the center of said driving patch in a Y-direction, and
• wherein the patch antenna further comprises a parasitic resonator that is disposed on the lower surface of said second substrate, that is made of metal, and that has an L shape, wherein an angle between two arms of said parasitic resonator faces said driving radiative element, and wherein a connected position of the two arms of said parasitic resonator is aligned with the center of said driving patch and the two centers respectively of the another two of said driving stubs in the Y-direction.