Radar sensor and method for controlling same to reduce the crosstalk of digital signals to the HF radar signal

A radar sensor comprising:

• a transceiver device to generate a radar signal, output power of the transceiver device being settable;
• a control unit;
• and
• an interface unit including a digital interface to control the transceiver device, wherein:
• the digital interface is a serial interface that includes a plurality of lines;
• the plurality of lines include a line for a selection signal, a line for a clock signal, and a line for at least one data signal;
• the line for the selection signal is connected to the control unit;
• and
• the control unit is configured to lower the output power of the transceiver device in response to the line for the selection signal being set at a predetermined level.