US 12,449,534 B2
Vehicular radar sensor with cross channel isolation
Helmut Arnold Hardow Wodrich, Clarkston, MI (US); Walter Gordon Woodington, Lincoln, MA (US); Suresh Boddi, New Hudson, MI (US); Holger Hess, Aschaffenburg (DE); and Danny A. Schram, Clarkston, MI (US)
Assigned to Magna Electronics Inc., Auburn Hills, MI (US)
Filed by Magna Electronics Inc., Auburn Hills, MI (US)
Filed on Jul. 28, 2022, as Appl. No. 17/815,632.
Claims priority of provisional application 63/203,732, filed on Jul. 29, 2021.
Prior Publication US 2023/0035968 A1, Feb. 2, 2023
Int. Cl. G01S 13/931 (2020.01); H01Q 1/32 (2006.01); G01S 13/933 (2020.01); H01P 5/12 (2006.01); H01P 5/20 (2006.01); H04B 5/00 (2024.01); H04B 7/24 (2006.01)
CPC G01S 13/931 (2013.01) [H01Q 1/3233 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A vehicular radar sensing system, the vehicular radar sensing system comprising:
a radar sensor configured to be disposed at a vehicle equipped with the vehicular radar sensing system so as to sense exterior of the vehicle;
wherein the radar sensor comprises (i) at least one transmitter that transmits radio signals, and (ii) at least one receiver that receives radio signals;
wherein the radar sensor comprises a waveguide antenna;
wherein the radar sensor comprises a processor operable to process radio signals transmitted by the at least one transmitter and received by the at least one receiver;
wherein the radar sensor comprises a printed circuit board (PCB), and wherein the PCB comprises a transmitter pad and a receiver pad, and wherein (i) the transmitter pad comprises a first conductive pad disposed at an outer surface of the PCB and (ii) the receiver pad comprises a second conductive pad disposed at the outer surface of the PCB, and wherein the transmitter pad is separate and distinct from the receiver pad;
wherein the at least one transmitter transmits radio signals to the transmitter pad, and wherein the at least one receiver receives radio signals from the receiver pad;
wherein the PCB comprises a laminate construction having a plurality of conductive and dielectric layers laminated on a substrate, and wherein at least one layer of the plurality of conductive and dielectric layers comprises a ground plane layer;
wherein the PCB comprises a plurality of metallic structures, and wherein the plurality of metallic structures at least partially surrounds the transmitter pad on at least three sides of the transmitter pad on the outer surface of the PCB, and wherein the plurality of metallic structures at least partially surround the receiver pad on at least three sides of the receiver pad on the outer surface of the PCB, and wherein each metallic structure of the plurality of metallic structures passes through a plurality of layers of the PCB and electrically connects the waveguide antenna to the ground plane layer, and wherein the plurality of metallic structures attaches the PCB to the waveguide antenna; and
wherein, with the radar sensor disposed at the vehicle, the waveguide antenna (i) guides the transmitted radio signals from the transmitter pad to the exterior environment and (ii) guides reflected radio signals from the exterior environment to the receiver pad.