Patent ID: 8441406

Claim:
An apparatus comprising: a cross dipole antenna having a first polarization orientation, the cross dipole antenna comprising: a coaxial structure having a center conductor and an outer shield; a plurality of conductive arms comprising at least a first arm, a second arm, a third arm, and a fourth arm, wherein the plurality lie generally in a plane and are spaced apart from each other by about 90 degrees, such that a proximal end of each of the plurality of arms is arranged near a center point and wherein each of the plurality of arms extends generally outward at a distal end, wherein: the first arm is electrically coupled to the center conductor at a proximal end and has a first predetermined length; the second arm is electrically coupled to the center conductor at a proximal end and has a second predetermined length different from the first predetermined length; the third arm is electrically coupled to the outer shield at a proximal end and has a third predetermined length, wherein the third predetermined length is longer than the first predetermined length, the third arm extending opposite the first arm such that the third arm and the first arm form a first dipole; and the fourth arm is electrically coupled to the outer shield at a proximal end and has a fourth predetermined length, wherein the fourth predetermined length is longer than the second predetermined length, the fourth arm extending opposite the second arm such that the fourth arm and the second arm form a second dipole; and a second antenna having a second polarization orthogonal to the first polarization.