Abstract: The present disclosure relates to a transmission apparatus, including at least one first RF signal connection for an RF signal having a first phase, a ring coupler having a plurality of antenna connections for coupling a plurality of antennas in the first RF signal connection, wherein the ring coupler is configured to cause, at each of different antenna connections of the ring coupler, a constructive superposition of components of the RF signal that propagate from the first RF signal connection to the respective antenna connections in different directions in the ring coupler, wherein RF signals having different phases are obtained at the different antenna connections.

Abstract: A radar apparatus is provided having an antenna that has a frequency-dependent directional characteristic. The radar apparatus includes a transmitter circuit designed to generate a first frequency-modulated continuous wave (FMCW) frequency ramp having a first center frequency and at least one second FMCW frequency ramp having a second center frequency, which is different than the first center frequency. The transmitter circuit is configured to drive the antenna using the first FMCW frequency ramp to produce a first directional characteristic for the at least one antenna, and to drive the antenna using the at least one second FMCW frequency ramp to produce a second directional characteristic for the antenna, where the second directional characteristic is different from the first directional characteristic. It is thus possible to exploit an antenna squinting effect in order to increase an angular resolution.

Abstract: An antenna unit includes an antenna having at least two elements for emitting and/or receiving electromagnetic radiation. The antenna is arranged on a support substrate. Furthermore, the antenna unit includes an electromechanical actuator that is arranged on the support substrate and configured to take a control signal as a basis for mechanically deforming the support substrate along a spatial direction in order to adjust a distance between the at least two elements of the antenna along the spatial direction for the purpose of influencing an antenna parameter of the antenna. The antenna unit also includes a control circuit configured to generate the control signal based on a target value for the antenna parameter.

Abstract: A method is proposed for determining at least one calibration parameter for a radar system having a first radar transceiver and a second radar transceiver. The method includes performing a first calibration measurement and a second calibration measurement. The first calibration measurement and the second calibration measurement both include generating a first frequency-modulated oscillation signal and a second frequency-modulated oscillation signal, and combining the first oscillation signal received via the second terminal with the second oscillation signal, in order to generate a first difference signal for the first calibration measurement and a second difference signal for the second calibration measurement, both having a frequency difference between the first oscillation signal and the second oscillation signal.

Abstract: The present disclosure relates to a transmission apparatus, including at least one first RF signal connection for an RF signal having a first phase, a ring coupler having a plurality of antenna connections for coupling a plurality of antennas in the first RF signal connection, wherein the ring coupler is configured to cause, at each of different antenna connections of the ring coupler, a constructive superposition of components of the RF signal that propagate from the first RF signal connection to the respective antenna connections in different directions in the ring coupler, wherein RF signals having different phases are obtained at the different antenna connections.

Abstract: A radar apparatus is provided having an antenna that has a frequency-dependent directional characteristic. The radar apparatus includes a transmitter circuit designed to generate a first frequency-modulated continuous wave (FMCW) frequency ramp having a first center frequency and at least one second FMCW frequency ramp having a second center frequency, which is different than the first center frequency. The transmitter circuit is configured to drive the antenna using the first FMCW frequency ramp to produce a first directional characteristic for the at least one antenna, and to drive the antenna using the at least one second FMCW frequency ramp to produce a second directional characteristic for the antenna, where the second directional characteristic is different from the first directional characteristic. It is thus possible to exploit an antenna squinting effect in order to increase an angular resolution.