Patent ID: 8723746

Claim:
An antenna, comprising: a ground plane; and a radiator extending from the ground plane to radiate a signal; the ground plane including at least one slot positioned therein to polarize a portion of an EM signal emanating through the ground plane in a direction of a free end of the radiator to increase a signal gain at a null position of the antenna; the at least one slot being entirely radially separated a distance from the radiator; the ground plane having a first conductive surface, a second conductive surface and a thickness between the first conductive surface and second conductive surface; the at least one slot traversing at least a portion of the thickness; the at least one slot comprising a first slot, a second slot, a third slot and a fourth slot; the first slot and the third slot being a first distance from the radiator; the second slot and the fourth slot being a second distance from the radiator; the first distance and the second distance being such to cause a ninety degree phase shift of the signal.