Abstract: A vacuum unit having at least one vacuum generator extending along a main axis and comprising a base body, further having a silencer housing containing a silencer. An ejector unit extends in the base body and an ejector axis is oriented parallel to the main axis and a suction zone of the ejector unit communicates via a vacuum channel with a vacuum tapping opening, and an air exhaust channel of the ejector unit extends through the silencer housing and has a deflected course through 90 degrees in the silencer housing and opens out to the environment with an air exhaust opening. The vacuum tapping opening is formed on an end face of the silencer housing facing away from the base body in the main direction and wherein the air exhaust opening is also formed on the silencer housing with an orientation perpendicular to the main axis.

Abstract: A vacuum unit with at least one vacuum generator, including a working unit with an ejector unit through which compressed air can flow for a vacuum generation and with an electrically actuable vacuum control valve which controls the application of compressed air to the ejector unit, further including a display and control module with a display module for visualizing status information and an operating device for manual input and/or interrogation of operating parameters. The display and control module is located on an upper side of the vacuum generator and is pivotably mounted on the working unit by means of a pivot bearing, so that it can be selectively positioned in a basic position covering the working unit or in at least one pivoted position pivoted upwardly away from the working unit by means of a module pivoting movement which can be executed with respect to a pivot center.

Abstract: An antenna comprising a network of arrayed radiating elements, a first reflective means comprising a flat central part upon which are disposed the radiating elements and longitudinally folded edges on either side of the array of elements, and at least one second reflective means which is a choke reflector disposed outside of the space separating the radiating elements of the reflector's folded edge. The second reflective means is separated from the first reflective means by a layer of dielectric material in order to connect it to the first reflective means by way of capacitive coupling.

Abstract: The invention relates to a dual polarized radiating element for a cellular base station antenna, comprising a reflector surface for reflecting radiation energy, four radiating monopoles distributed around an aperture area, each radiating monopole comprising a footing protruding from said reflector surface and a flange located above the reflector surface and protruding from said footing radially towards the outside, the flanges from adjacent monopoles extending radially perpendicular to each other. The element further comprises four element feeds, each capacitively coupled to a respective monopole and protruding radially therefrom within the aperture area, and powering means connected to the element feeds.

Abstract: An antenna comprising a network of arrayed radiating elements, a first reflective means comprising a flat central part upon which are disposed the radiating elements and longitudinally folded edges on either side of the array of elements, and at least one second reflective means which is a choke reflector disposed outside of the space separating the radiating elements of the reflector's folded edge.

Abstract: The object of the present invention is an antenna system comprising at least one first antenna and at least one second antenna, each comprising spaced-apart radiating elements aligned along the longitudinal axis of the antenna, the second antenna being disposed a short distance away from, and parallel to, the first antenna, characterized in that the plane perpendicular to the longitudinal axis passing through a radiating element of the first antenna is displaced in the direction of the longitudinal axis with respect to the plane perpendicular to the longitudinal axis passing through the radiating element of the second antenna which is closest to it.

Abstract: The invention relates to a dual polarised radiating element (1) for a cellular base station antenna, comprising: a reflector surface (21) for reflecting radiation energy, four radiating monopoles (4a to 4d) distributed around an aperture area (8), each radiating monopole comprising a footing (42a to 42d) protruding from said reflector surface and a flange (41a to 41d) located above the reflector surface and protruding from said footing radially towards the outside, the flanges from adjacent monopoles extending radially perpendicular to each other, wherein it further comprises: four element feeds (5a to 5d), each capacitively coupled to a respective monopole and protruding radially therefrom within the aperture area (8); powering means (6ac, 6bd, 7a to 7d, 7ac, 7bd) connected to the element feeds.