Radar system comprising a plurality of radar chips

A method for operating a radar system comprising at least three radar chips wherein a radar chip, of the at least three radar chips, is operated in a master mode in which the radar chip generates radio-frequency (RF) oscillator signal that is transferred to other radar chips of the at least three radar chips, which are operated in a slave mode;

• the method comprises:
• detecting whether the radar chip operated in the master mode is operating properly;
• and
• if the radar chip operated in the master mode is not operating properly, reconfiguring the radar system,
• wherein another radar chip, previously operated in the slave mode, is operated in the master mode, such that the other radar chip generates the RF oscillator signal that is transferred to the other radar chips.

A radar system comprising:

• a plurality of radar chips including a first radar chip, a second radar chip, and a third radar chip,
• each of the plurality of radar chips comprising at least one external radio-frequency (RF) contact,
• wherein the plurality of radar chips comprise a local oscillator designed to generate an RF oscillator signal in a switched-on state, and
• wherein the external RF contacts of the plurality of radar chips are couplable in such a way to permit, in a first operating mode, the RF oscillator signal to be generated by the first radar chip and transferred to the second radar chip and to the third radar chip, and to permit, in a second operating mode, in which the first radar chip is configured as inactive, the RF oscillator signal to be generated by the second radar chip and transferred to the third radar chip.

A radar system comprising:

• a first subsystem comprising a first radar chip and a second radar chip;
• and
• a second subsystem comprising a third radar chip;
• wherein the second radar chip of the first subsystem is configured, in a first operating mode, either to generate a radio-frequency (RF) oscillator signal and to output the RF oscillator signal at an RF output or to output an RF oscillator signal received from a different radar chip of the first subsystem at the RF output,
• wherein the third radar chip of the second subsystem is configured, in the first operating mode, to receive the RF oscillator signal output by the second radar chip at an RF input, and
• wherein the third radar chip of the second subsystem is further configured, in a second operating mode, either to generate a further RF oscillator signal or to receive a further RF oscillator signal generated by a different radar chip of the second subsystem.

A radar system comprising:

• a first subsystem comprising a first radar chip and a second radar chip, and
• a second subsystem comprising a third radar chip and a fourth radar chip,
• wherein the second radar chip of the first subsystem and the fourth radar chip of the second subsystem comprise transmitting channels for connecting transmitting antennas, but no receiving channel,
• wherein the second radar chip of the first subsystem is directly or indirectly coupled to the first radar chip of the first subsystem in order to receive a local oscillator (LO) signal output by the first radar chip, wherein the fourth radar chip of the second subsystem is directly or indirectly coupled to the third radar chip of the second subsystem in order to receive an LO signal output by the third radar chip,
• wherein the first radar chip of the first subsystem is configured, in a first operating mode, to generate the LO signal, using a local oscillator, and to transfer the LO signal via one or more RF lines directly or indirectly to the third radar chip of the second subsystem, and
• wherein the third radar chip of the second subsystem is configured in a second operating mode, in which no LO signal is transferred into the second subsystem by the first subsystem, to generate a further LO signal using a further local oscillator.