Patent ID: 8289215

Claim:
A portable receiving device for a global positioning system (GPS), comprising: a housing having a first surface, at least one positioning pin, a second surface and a third surface perpendicular to the first and second surfaces, the second surface is perpendicular to the first surface; a circuit board disposed inside the housing, the circuit board having a ground portion and a signal feeding portion; and a planar inverted F antenna comprising: a metal plate disposed on the first surface of the housing for receiving a GPS signal, the metal plate having at least one positioning hole, the positioning pin of the housing inserted into the positioning hole for fixing the metal plate, the metal plate comprising: a main body plate disposed on the first surface, wherein the main body plate has a first lateral side and a second lateral side; a first extension plate bent on the first lateral side of the main body plate and disposed on the second surface; and a second extension plate bent on the second lateral side of the main body plate and disposed on the third surface, wherein the length of the first extension plate along the first lateral side is equal to that of the main body plate, and the length of the second extension plate along the second lateral side is smaller than that of the main body plate; a first electric conducting element having a first end pressed against the metal plate of the planar inverted F antenna and a second end fixed to the ground portion of the circuit board; and a second electric conducting element for feeding the GPS signal to the circuit board, the second electric conducting element having a third end pressed against the metal plate of the planar inverted F antenna and a fourth end fixed to the signal feeding portion of the circuit board; wherein the first electric conducting element and the second electric conducting element are pressed against to a lateral side of the metal plate, and a distance between the lateral side and a center of the portable receiving device is smaller than that between other lateral sides of the metal plate and the center of the portable receiving device.