Patent ID: 7202821

Claim:
An antenna comprising: (a) a conductive ground plate; (b) a first holder provided to the ground plate vertically; (c) a first antenna element formed on one of a front face and a rear face of the first holder, the first antenna element including: (c-1) a first end coupled to a power feed point; and (c-2) an intermediate section formed above the ground plate and folded in plural times; (d) a second holder provided to the ground plate vertically and confronting the first holder at a given interval; (e) a second antenna element formed on one of a front face and a rear face of the second holder, the second antenna element including: (e-1) a first end coupled to a second end of the first antenna element; (e-2) an intermediate section formed above the ground plate and folded in plural times; (e-3) a second end coupled to the ground plate, and (f) a parasitic antenna element including first and second ends, the first end being coupled to the ground plate and the second end being open circuited, the parasitic antenna extending along a plane at a given interval from one of the first or second holders, wherein the first holder and the second holder are dielectric substrates, and the first antenna element and the second antenna element are conductors patterned on the dielectric substrates.