Patent ID: 7064728

Claim:
An ultra-wideband dipole antenna comprising: a generally axially disposed first outer metal sleeve having a first closed face located at a top end thereof opposite an open bottom end, and a first hole through the first closed face; a generally axially disposed intermediate metal sleeve surrounded by the first outer metal sleeve, the intermediate metal sleeve having a second closed face located at a top end thereof opposite an open bottom end, and a second hole through the second closed face, wherein the second closed face is separated from the first closed face and the first closed face is located higher than the second closed face with a predetermined space; a generally axially disposed second outer metal sleeve above the first outer metal sleeve, the second outer metal sleeve having a third closed face located at a bottom end thereof opposite an open top end; a conductive interconnection having a bottom end extended through the first hole, a feed point location located at a bottom end located within the first outer metal sleeve, and a top end thereof electrically connected to the third closed face; and an inner coaxial conductor surrounded by the intermediate metal sleeve, the coaxial conductor including a central conductor having a top end electrically connected to the feed point location and an outer grounding sleeve surrounding the central conductor and having a top end electrically connected to edges of the second hole.