US 11,681,013 B2
Radar system comprising a plurality of radar chips
Alexander Melzer, Neutillmitsch (AT); and Clemens Pfeffer, Linz (AT)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on May 28, 2020, as Appl. No. 16/886,233.
Claims priority of application No. 102019115107.4 (DE), filed on Jun. 5, 2019.
Prior Publication US 2020/0386854 A1, Dec. 10, 2020
Int. Cl. G01S 7/32 (2006.01); G01S 7/35 (2006.01); G01S 7/03 (2006.01); G01S 13/58 (2006.01); G01S 13/32 (2006.01); G01S 13/931 (2020.01); G01S 13/34 (2006.01); G01S 13/00 (2006.01); G01S 13/87 (2006.01)
CPC G01S 7/032 (2013.01) [G01S 7/35 (2013.01); G01S 7/03 (2013.01); G01S 7/352 (2013.01); G01S 13/003 (2013.01); G01S 13/32 (2013.01); G01S 13/343 (2013.01); G01S 13/583 (2013.01); G01S 13/584 (2013.01); G01S 13/878 (2013.01); G01S 13/931 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A radar system, comprising:
a first radar chip comprising a local oscillator comprising a first output, the local oscillator is configured to provide a local oscillator signal at the first output;
a first frequency divider contained in the first radar chip and comprising a second output, the first frequency divider being coupled to the first output of the local oscillator and being configured to provide a frequency-divided signal based on the local oscillator signal at the second output; and
a second radar chip comprising:
a first input coupled to the first output and configured to receive the local oscillator signal from the first output of the first radar chip;
a second input coupled to the second output and configured to receive the frequency-divided signal from the second output of the first radar chip;
an output channel, to which the local oscillator signal received at the first input is fed, configured to generate an output signal based on the local oscillator signal; and
a circuit configured to generate, based on the output signal of the output channel and the received frequency-divided signal, a phase angle signal indicating a phase angle of the output signal relative to the received frequency-divided signal.