Lens antenna arrangement
AssigneeU.S. Philips Corporation
InventorKnut E. Cassel
Life of this patent
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Abstract
An antenna, preferably operating in the microwave range, comprising a Luneberg lens with a disc having a radially varying refraction index and provided with feeders distributed around the circumference. Each feeder has the shape of a thin wire the projection of which, as seen radially relative to the center of the round disc, forms a straight line inclined 45.degree. against the plane of the disc. All feeders are inclined in the same direction in their respective radial planes, whereby the feeders opposite a respective feeder will be oriented substantially perpendicular to the feeder permitting passage of radiation to and from the feeder. All of the feeders can be active simultaneously.
Claims6
A lens antennas arrangement, operable within the microwave range, comprising a round disc-shaped lens element with a radially varying refraction index, covered on at least one of the major sides by a conductive plane, and including feeders located at the circumference for reception or transmission of electromagnetic energy passing through the disc-shaped lens element, characterized in that the feeders are directive dipole feeders distributed around the circumference of the lens element, said dipole feeders being shaped such that each feeder has a limited lobe directed diametrically through the lens element, and that each dipole feeder is located in a plane which is inclined approximately 45.degree. relative to the lens plane, all feeders--as seen radially for each individual feeder--being inclined in the same direction so that each feeder is polaraized substantially orthogonally relative to the plane of the feeder situated diametrically opposite thereto, switching means being electrically-connected between the feeders and means for selectively activating the feeders.
Dependencies are inferred from the claim text.