Abstract: A motor-vehicle radar system provided with at least one housing includes at least one send/receive element for sending and/or receiving electromagnetic waves, at least one first dielectric member in the beam path of the electromagnetic waves, and at least one arrangement of electrical conductor tracks which are in direct contact with the first dielectric member. It is possible to supply an electric power to the electrical conductor tracks, the electrical conductor tracks preferably being used to heat the first dielectric member, and the electrical conductor tracks being made of a material having a pronounced, positive temperature coefficient (PTC characteristic).

Abstract: A method and a radar sensor for determining an elevation angle error of a multibeam radar sensor are described. In order to detect an elevation angle of the multibeam radar system with respect to a predefined target, a plurality of laterally arranged cutting planes at a predefined distance are formed. The values of the corresponding antenna diagrams in each plane are stored in a suitable form, for example, normalized and in a parametric form taking into account the elevation angle &agr;. In order to reduce the size of the memory, it is sufficient to store one symmetry half for reasons of symmetry if additional information, for example, road clutter values are added, so that the upward or downward direction of the angle can be recognized. By comparing the measured echo values obtained by normalization and application of a quality factor, a corresponding elevation angle &agr; is obtained for each cutting plane.

Abstract: In a lens arrangement for collimating radar waves for distance sensors, in particular for motor vehicles, several sublenses are arranged integrally next to one another. A lobe enlargement necessary for angular analysis is thereby achieved. The range is only slightly reduced as compared to a lens having a surface area of the same size.

Abstract: A motor vehicle radar sensor having an antenna arrangement includes a focusing element and at least three first exciter elements which, in conjunction with the focusing element, constitute at least three principal lobes which overlap at most partially and which are switchably or permanently connectable or connected to first transmission and/or reception circuits of the radar sensor, such that at least one further exciter element is present, which is connected directly in parallel with one of the first exciter elements in such a way that these two exciter elements obtain their signals together from the same transmission circuit, and deliver them together to the same reception circuit. An arrangement of this kind makes it possible to produce in the antenna diagram of the radar sensor a shoulder-like protrusion of a principal lobe which advantageously expands the observable angular region, particularly in the close-in range.

Abstract: A microwave antenna arrangement, made up of a focusing element and at least one feeder element, in which arrangement, to attain a small size, at least one component support is arranged in a spatial area between the focusing element and the at least one feeder element, electronic or electrical components being located on the component support. The component support has a cut-out to allow passage of the electronic waves. The component support and the electronic or electrical components are provided for processing signals other than those received or emitted by the at least one feeder element.

Abstract: In a device for directional transmission and/or receiving of electromagnetic waves, including at least one antenna element and a dielectric lens, there is arranged between them a prefocusing dielectric body for avoiding overradiation of the lens. In order to simplify adjustment, the lens has an extended surface, is preferably pot-shaped, and forms, in conjunction with a baseplate, a hermetically sealed housing for unencapsulated ICs.