Patent ID: 7498991

Claim:
A miniature combo built-in antenna structure, applied in an antenna structure built in a personal navigation device, the antenna structure comprising: a substrate, having a grounding metal surface disposed on right side of a front side of the substrate, and a circuit contact point area electrically connected to another grounding metal surface disposed on right side of a backside of the substrate, and the circuit contact point area including a first signal output contact point, and a penetrating hole disposed at a position deviated from a center position of the two grounding metal surfaces, such that the penetrating hole is electrically connected with the circuit contact point area on the backside of the substrate, and a left side of the substrate has two symmetric first contact point and second contact point, and a linear micro strip line is extended from the first contact point and electrically extended from the backside of the substrate and disposed adjacent to the grounding metal surface, and an end of the micro strip line extended from the substrate has a second signal output contact point; a first antenna unit, having a base disposed thereon, a radiating metal plate disposed on a surface of the base, and the bottom surface of the base having a grounding metal plate electrically connected to the grounding metal surface at the front side of the substrate, and each of the base, radiating metal plate and grounding metal plate having a through hole for passing into a signal feeder and electrically connecting the radiating metal plate, such that the radiating metal plate defines a signal feeding terminal, and an end of the signal feeder is passed through the penetrating hole of the substrate and electrically connected to the circuit contact point area; and a second antenna unit, having a carrier with both ends covered with a first electrode and a second electrode that are electrically connected to the first contact point and the second contact point disposed on the front side of the substrate respectively, and a conducting wire covered onto the surface of a carrier electrically connected between the two electrodes.