Abstract: Radar sensor, having an antenna assembly and a monolithic microwave integrated circuit that is arranged on a circuit board of the radar sensor and comprises at least one antenna connection that is to be connected to the antenna assembly, in particular is implemented in a ball grid, provides radar signals to be emitted, which can be generated by the microwave circuit, or accepts received radar signals from the antenna assembly, the connection of the antenna connection to the antenna assembly being formed at least in part by a waveguide, wherein, for connecting the at least one antenna connection to the waveguide designed as a wave duct, the circuit board comprises, at the position of the antenna connection, a through-opening leading to the side of the circuit board opposite the microwave circuit, through which the antenna connection is connected to a radiation element projecting into the waveguide arranged on the opposite side of the circuit board at the position of the antenna connection.

Abstract: A radar sensor in a motor vehicle has at least one antenna arrangement for emitting and receiving radar signals and a processing device for evaluating received radar signals. The antenna arrangement is controlled to simultaneously emit and receive radar signals both in a far frequency range and in a near frequency range, where the bandwidth of the near frequency range is greater than that of the far frequency range. The received radar signals of the near frequency range are evaluated as radar data of a higher distance resolution and received radar signals of the far frequency range are evaluated as radar data of a lower distance resolution.

Abstract: A radar sensor for a motor vehicle, in particular a passenger car, is disclosed. The radar sensor has a control unit, an antenna arrangement, and a reflector device for reflecting transmitted radar signals from the antenna arrangement into a measurement region and radar signals, which are to be received by the antenna arrangement from the measurement region. The reflector device has a parabolic reflector. The control unit is designed to change the measurement region by changing the radiation characteristic and/or the reception characteristic, in particular by beamsteering and/or beamforming, during control of the antenna arrangement such that various reflection regions of the reflector device that correspond to different measuring regions are used.

Abstract: The present disclosure relates to a method for operating a radar sensor, in particular a long range radar sensor, in a motor vehicle. The radar sensor has a detection range defined by an area in front of the motor vehicle or an area behind the motor vehicle. The radar sensor is operated with a transmitting power that determines the detection range of the radar sensor, and radar data of the radar sensor is evaluated within the radar sensor to detect objects in the detection range. The transmitting power of the radar sensor is increased from a first transmitting power value to a second transmitting power value when a switching criterion is met, indicating that no objects satisfying a relevance criterion have been detected by the radar sensor.

Abstract: Radar sensor, having an antenna assembly and a monolithic microwave integrated circuit that is arranged on a circuit board of the radar sensor and comprises at least one antenna connection that is to be connected to the antenna assembly, in particular is implemented in a ball grid, provides radar signals to be emitted, which can be generated by the microwave circuit, or accepts received radar signals from the antenna assembly, the connection of the antenna connection to the antenna assembly being formed at least in part by a waveguide, wherein, for connecting the at least one antenna connection to the waveguide designed as a wave duct, the circuit board comprises, at the position of the antenna connection, a through-opening leading to the side of the circuit board opposite the microwave circuit, through which the antenna connection is connected to a radiation element projecting into the waveguide arranged on the opposite side of the circuit board at the position of the antenna connection.

Abstract: Antenna device for a radar detector, which has a circuit board having an electrically insulating substrate, on which a respective electrically conductive layer is arranged on each of two opposing sides, wherein the layer of at least one first side is configured as at least one main antenna. According to the invention, in addition to the at least one main antenna in each case, at least one antenna structure is provided which is integrated with the substrate, wherein each antenna structure integrated with the substrate comprises: a plurality of cutouts which are formed in the substrate and arranged in a waveguide and in each of which an electrically conductive material is arranged at least partially, and a feeder cable formed by the electrically conductive layer of one of the sides for feeding an electromagnetic wave into the antenna structure integrated with the substrate.

Abstract: The invention relates to a method for operating a radar sensor in a motor vehicle. The radar sensor has at least one antenna arrangement for emitting and receiving radar signals and a processing device for evaluating received radar signals. The antenna arrangement is controlled to simultaneously emit and receive radar signals both in a far frequency range and in a near frequency range, where the bandwidth of the near frequency range is greater than that of the far frequency range. The received radar signals of the near frequency range are evaluated as radar data of a higher distance resolution and received radar signals of the far frequency range are evaluated as radar data of a lower distance resolution.

Abstract: The present disclosure involves a method for determining the critical local expansion of a component with an eye toward the appearance of edge cracks based on an expansion of the component in the shaping process. Given a local expansion of the component at the edges that is smaller than the critical local expansion, no edge cracks arise that are larger than 1 ?m. In particular, at least one expansion test is performed with at least one test component, and a critical overall expansion is determined with the at least one expansion test. The local maximum expansion of the test component is determined that the test component exhibits at the time of the critical overall expansion of the test component, and the local maximum expansion is the critical local expansion.

Abstract: Antenna device for a radar detector, which has a circuit board having an electrically insulating substrate, on which a respective electrically conductive layer is arranged on each of two opposing sides, wherein the layer of at least one first side is configured as at least one main antenna. According to the invention, in addition to the at least one main antenna in each case, at least one antenna structure is provided which is integrated with the substrate, wherein each antenna structure integrated with the substrate comprises: a plurality of cutouts which are formed in the substrate and arranged in a waveguide and in each of which an electrically conductive material is arranged at least partially, and a feeder cable formed by the electrically conductive layer of one of the sides for feeding an electromagnetic wave into the antenna structure integrated with the substrate.

Abstract: The present disclosure involves a method for determining the critical local expansion of a component with an eye toward the appearance of edge cracks based on an expansion of the component in the shaping process. Given a local expansion of the component at the edges that is smaller than the critical local expansion, no edge cracks arise that are larger than 1 ?m. In particular, at least one expansion test is performed with at least one test component, and a critical overall expansion is determined with the at least one expansion test. The local maximum expansion of the test component is determined that the test component exhibits at the time of the critical overall expansion of the test component, and the local maximum expansion is the critical local expansion.

Abstract: A stretch-forming device is provided for stretch forming a workpiece, which has a first bending device having a first bending stamp and a first bending shoe and a second bending device having a second bending stamp and a second bending shoe. In addition, the stretch-forming device has a first shaft and a second shaft, the first shaft mounted so it is rotatable around a first axis and providing a first support surface for the workpiece, and the second shaft mounted so it is rotatable around a second axis and providing a second support surface for the workpiece. The first bending stamp and the second bending stamp are components of a first part of the stretch-forming device, and the first bending shoe and the second bending shoe are components of a second part of the stretch-forming device. The first part and the second part are movable relative to one another.