Patent ID: 8576135

Claim:
A bicone antenna, comprising: a dielectric body having an upper portion, a lower portion, and a central portion coaxial with the upper portion and lower portion and located between the upper portion and the lower portion; a first frustum shaped cavity formed in the upper portion of the body with the apex of the first frustum shaped cavity adjacent to the central portion, wherein the first frustum shaped cavity is coated with a first conducting material and is connectable to an antenna feed element; a second frustum shaped cavity formed in the lower portion of the body with the apex of the second frustum shaped cavity adjacent to the central portion, wherein the second frustum shaped cavity is coated with a second conducting material and is connectable to a ground element; a cylindrical cavity formed in the central portion, the cylindrical cavity connecting the apex of the first frustum shaped cavity and the apex of the second frustum shaped cavity, the cylindrical cavity lacking a coating of conducting material and having a cross-sectional area sufficient to receive the antenna feed element; and a parasitic element encircling the central portion and comprising a band of a third conducting material, wherein the parasitic is separated from the coating of the first frustum shaped cavity and the coating of the second frustum shaped cavity by dielectric material of the dielectric body.