Patent ID: 8149174

Claim:
An antenna system comprising: at least a first antenna having an insulating substrate and a conductive radiating element, the radiating element being substantially planar in shape along its edges; at least a second antenna having an insulating substrate and a conductive radiating element the radiating element being substantial) planar in shale along its edges; at least one coupler having a first signal connector, a second signal connector and an insulator isolating the first and second signal connectors, the first signal connector electrically connected to the radiating element of the first antenna; and at least three grounding planes for the antennas, the grounding planes comprising conductive plates electrically isolated from the antennas, wherein the grounding planes have relative potentials with respect to each other and in use the grounding planes are inductively coupled to the antennas whereby the radiation pattern of at least one antenna is substantially ellipsoidal in shape.