Patent ID: 7439910

Claim:
A three-dimensional antenna structure, suitable for being built in an electronic device, the three-dimensional antenna structure comprising: a vertical patch, for generating a vertical current, the vertical patch having a first end and second end; an annular patch being transverse to the vertical patch and extending from the first end of the vertical patch, wherein a first end of the annular patch is directly connected to the first end of the vertical patch, the annular patch surrounds one side of the vertical patch for generating an annular current, an omni-directional radiation field is formed by the annular current and the vertical current, and the annular patch has a feed point suitable for electrically connecting to a signal source; and a ground patch, wherein a first end of the ground patch is directly connected to the second end of the vertical patch, a first distance along the vertical patch exists between the first end of the annular patch and the first end of the ground patch, and a second end of the ground patch opposite to the first end thereof has a shorting point next to the feed point and is suitable for electrically connecting to a ground.