公开(公告)号：US11567170B2

公开(公告)日：2023-01-31

申请号：US16850605

申请日：2020-04-16

Applicant: Infineon Technologies AG

Inventor： Grigory Itkin ,  Michael Jung

IPC: G01S7/40 ,  G01S13/28 ,  G01S7/35 ,  G01S13/34 ,  G01S7/282

Abstract: A method for calibrating a radar system includes generating an RF oscillator signal and distributing the RF oscillator signal to a plurality of phase shifters each providing a respective phase-shifted RF oscillator signal; receiving the phase-shifted RF oscillator signals by corresponding radar chips and radiating the phase-shifted RF oscillator signal via a first RF output channel of a first one of the radar chips; receiving a back-scattered signal by at least one RF input channel of each radar chip and generating a plurality of base-band signals by down-converting the received signals into a base band using the phase-shifted RF oscillator signals received by the corresponding radar chips; determining a phase for each base-band signal; and adjusting the phase shifts caused by the phase shifters such that the phases of the base-band signals match a predefined phase-over-antenna-position characteristic.