Abstract: An antenna arrangement for a radar surveillance method for target locating having altitude acquisition provides that, for the purpose of level comparison, a plurality of overlapping lobes lying above one another are generated by a reflector rotating around a vertical axis together with a primary radiator row arranged essentially vertically. In employing a paraboloid of revolution as the reflector, a vertical primary radiator row is arranged around its focal point. Given more greatly deflected beams whose exciters are at a greater distance from the focal point, the gain in such an antenna decreases as the side lobes increase, limiting the elevation angle range. A single parabolic cylinder reflector generating a beam and focusing only in the horizontal plane is employed as the reflector, the individual radiators of a primary radiator row being arranged along its focal line.

Abstract: A primary radar antenna has a secondary radar antenna or an IFF antenna integrated therewith. Excellent properties with respect to compactness, radiation and frequency dependency are achieved by providing a bilevel pillbox antenna having radiation deflection on a cylindrical parabolic reflector from one interplate space to another. The lower interplate space has, in proximity of the primary radar signal radiator, which is arranged with its radiation center in the focal line of the parabolic reflector, an additional feed for in-coupling of the IFF signal. The antenna is particularly suited as a combined primary and IFF radar antenna for smaller vehicles.

Abstract: A doppler navigation antenna having automatic land-sea error correction through the utilization of two somewhat differently inclined lobe groups consisting of four lobes each, and employing a plane radiator group which comprises a plurality of individual radiators arranged in parallel rows. Each end of each radiator is fed by a pair of feed lines which extend transversely in the rows, the individual feed lines of each pair of feed lines having slightly different phase delay characteristics.

Abstract: A primary radar antenna, designed as a pillbox antenna, has an IFF antenna integrated therewith. Excellent properties with regard to compactness, radiation and frequency dependency are achieved through the combination of a pillbox antenna with a multiple IFF antenna composed of a plurality of radiator elements, which is applied on the upper side of the pillbox antenna for radiation of the IFF signals. The antenna is particularly suitable as a combined primary radar/IFF antenna for smaller vehicles.

Abstract: A multiple omnidirectional antenna, utilizing individual antennae for different frequencies, and/or different polarizations, disposed along a common axis, and employing a multiple coaxial feed from one side only, in which the omnidirectional antenna which is remote from the feed side, is in the form of an axial wave-guide section, with the portion defining the walls thereof being connected to the outer conductor of the innermost coaxial feed line, and at least, in effect, defining at least one slot therein which runs transversely to the desired polarization direction of such antenna, with the inner conductor of the innermost coaxial feed line forming the exciting element therefor and projecting into the interior of said wave-guide, and/or at least one other omnidirectional antenna in the form of a coaxial line section, the walls of which are connected to the outer conductor of another coaxial feed line, and are provided with at least one slot therein which runs transversely to the desired polarization directi

Abstract: A drive for operating a punching tool comprises a toggle-joint lever to one of whose lever members the punching tool is operatively connected. The second lever member of the toggle-joint forms part of a quadrilateral linkage. This linkage consists of the second lever member, a first transverse lever member linked at one end to the second lever member and at the other end to another lever element, and a second transverse lever member linked at one end to the other lever element. The first transverse lever member is a two-armed lever supported on a fixed pivot near its linkage to the second lever member for pivoting the two-armed lever about the fixed pivot. The second transverse lever member and the other lever element are linked to a crank drive.

Abstract: A radar system having a primary and a secondary radar device each generating respective radiation lobes with the primary radiation device having means for making contact with a target and a secondary radiation device producing a radiation lobe which is displaced from a radiation lobe of the primary device so that the secondary device makes contact with the target following the time delay consumed by the processing of the target echo by the receiver of the primary device.

Abstract: A double omni-directional antenna for use with a transponder is disclosed allowing simultaneous operation within two different frequency bands. A double coaxial line is provided having outer, central, and inner concentric conductors. The outer and central conductors form a coaxial feed for a lower frequency antenna and the central and inner connectors form a coaxial feed for a high frequency antenna. The higher frequency antenna is located directly above the lower frequency antenna and each is either a unipole for vertically polarized radiation or a slot radiator for horizontally polarized radiation.