Patent ID: 7138948

Claim:
An antenna array of printed circuit board, said antenna array comprising: a printed circuit board, having a T-shape microstrip circuit disposed thereon, and an asymmetric end of said T-shape microstrip circuit serving as a feeding end of said antenna array; two antenna units, being in a microstrip form and fabricated on one side of said printed circuit board, and said antenna units each comprising a meandering microstrip and a extended area planar section, wherein one end of each said meandering microstrip is respectively coupled to two symmetric ends of said T-shape microstrip circuit, each said meandering microstrip is symmetrically disposed on both corners adjacent to said printed circuit board, and each said extended area planar section is a plane extended from the other end of said meandering microstrip and being placed adjacent to an external edge of said meandering microstrip in at least one direction to a position adjacent to a corresponding edge of a grounding metal surface or edge of said printed circuit board; and wherein said grounding metal surface, is fabricated on the other side of said printed circuit and disposed at a position other than those corresponding to said antenna units and maintaining a specific distance from the external edge of each said extended area planar section.