Patent ID: 7161540

Claim:
A dual-band patch antenna, comprising: a base board; a first rectangular radiator having a first corner portion and a second corner portion, wherein said first corner portion is diagonally opposite to said second corner portion; a second rectangular radiator having a third corner portion, wherein said second corner portion is orthogonally overlapped with said third corner portion coplanarly so as to form an overlap portion; a feeding line connected to a feed point located on said overlap portion; a first shorting strip connected to a first short point located on said first corner portion of said first rectangular radiator; and a second shorting strip connected to a second short point adjacent to one longer side of said second rectangular radiator with a predetermined distance spaced from the shorter side of said second rectangular radiator adjacent to said third corner portion, wherein said one longer side is located away from said overlap portion; wherein said first short strip and said second short strip are connected to a ground plane located on said base board.