Multi-band patch antenna module

A multi-band patch antenna module, comprising:

• a dielectric layer;
• an outer radiation patch formed with an insertion hole, and formed on one surface of the dielectric layer;
• wherein the outer radiation patch comprises four sides among which a second side and a third side are adjacent to a first side, wherein at least one protrusion portion is extended in an outside direction on each of the first side, the second side and the third side of the outer radiation patch, and
• an inner radiation patch inserted into the insertion hole, and formed on one surface of the dielectric layer, wherein the inner radiation patch comprises four sides among which a second side and a third side are adjacent to a first side, wherein at least one protrusion portion is extended in an outside direction on each of the first side, the second side and the third side of the inner radiation patch, wherein a horizontal length of the inner radiation patch is different from a vertical length of the inner radiation patch,
• wherein the first side, the second side and the third side of the outer radiation patch correspond to the first side, the second side and the third side of the inner radiation patch, respectively.