Patent ID: 6853346

Claim:
An elongate antenna adapted to be connected to a coaxial cable having a central conductor and comprising: a radiating portion constituted by an elongate conductor element which is machined so as to make up: N dipoles, where N is an integer not less than 2, made up of N rectilinear sections of said element in alignment; and N−1 phase-shifter elements, each phase-shifter element being interposed between two consecutive dipoles, each phase-shifter element being constituted by a section of said elongate conductor element folded into a U-shape with branches which are substantially juxtaposed and which extend in a direction that is orthogonal to the common direction of said dipoles, said radiating portion having two ends between which said dipoles and said phase-shifter elements are disposed, said coaxial cable being connected at said central conductor provided on one of said two ends of the radiating portion; means forming an impedance matching cavity mounted on said coaxial cable close to its end connected to said radiating portion; and means forming a trap of leaked currents, said trap means being mounted on said cable, on the side of said impedance cavity remote from said radiating portion.