Abstract: An antenna array and method of operation are disclosed for providing a very thin antenna arrangement with large coverage area for RFID applications and long distance sensitivity. The antenna arrangement comprises two or more antenna elements, each element comprises a planar spiral of conductive material with a feed terminal at one end of the spiral and preferably at its outer end. Each adjacent couple of antenna elements may be arranged with the direction of rotation of their spiral being in opposite directions. Each antenna element may be fed with RFID signal independently from the other antenna elements and preferably the antenna elements are fed one at a time.

Abstract: A flat, ultra wideband, unidirectional antenna is disclosed, the antenna may comprise a pair of active elements having the shape of substantially half-circles or half-ellipsoids made of thin conductive material and a ground element made of thin conductive material placed parallel and against to the active electrodes and spaced from them, the antenna having a nominal gain of at least 6 dbi and variations of gain in that range of +/?1.5 dbi at its bore sight.

Abstract: The invention comprises a flat panel antenna for microwave transmission. The antenna comprises at least one printed circuit board, and has active elements including radiating elements and transmission lines. There is at least one ground plane for the radiating elements and at least one surface serving as a ground plane for the transmission lines. The panel is arranged such that the spacing between the radiating elements and their respective groundplane is independent of the spacing between the transmission lines and their respective groundplane. A radome may additionally be provided which comprises laminations of polyolefin and an outer skin of polypropylene.

Abstract: The invention comprises a flat panel antenna for microwave transmission. The antenna comprises at least one printed circuit board, and has active elements including radiating elements and transmission lines. There is at least one ground plane for the radiating elements and at least one surface serving as a ground plane for the transmission lines. The panel is arranged such that the spacing between the radiating elements and their respective groundplane is independent of the spacing between the transmission lines and their respective groundplane. A radome may additionally be provided which comprises laminations of polyolefin and an outer skin of polypropylene.