US 12,241,992 B2
Radar chip with a waveguide coupling
Roland Baur, Koenigsfeld (DE); and Steffen Waelde, Niedereschach (DE)
Assigned to VEGA GRIESHABER KG, Wolfach (DE)
Appl. No. 17/777,526
Filed by VEGA GRIESHABER KG, Wolfach (DE)
PCT Filed Nov. 4, 2020, PCT No. PCT/EP2020/080980
§ 371(c)(1), (2) Date May 17, 2022,
PCT Pub. No. WO2021/099122, PCT Pub. Date May 27, 2021.
Claims priority of application No. 10 2019 217 736.0 (DE), filed on Nov. 18, 2019.
Prior Publication US 2023/0358855 A1, Nov. 9, 2023
Int. Cl. G01S 7/02 (2006.01); G01S 13/88 (2006.01); H01P 5/08 (2006.01); H01Q 1/22 (2006.01); H01Q 13/02 (2006.01)
CPC G01S 7/027 (2021.05) [G01S 13/88 (2013.01); H01P 5/08 (2013.01); H01Q 1/2208 (2013.01); H01Q 1/225 (2013.01); H01Q 13/02 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A radar chip comprising a waveguide coupling configured to couple a radar signal of the radar chip into and out of an antenna or a waveguide of a radar gauge, the waveguide coupling comprising:
a radio frequency substrate comprising a line, a radiating element, and a substrate-integrated waveguide disposed therebetween and connected thereto, configured to transmit the radar signal between the radar chip and the antenna or waveguide of the radar gauge and to couple the radar signal into and out of the antenna or waveguide of the radar gauge; and
a resonator element integrated in the radio frequency substrate at an end thereof at which end the radio frequency substrate is connected to the antenna or the waveguide, wherein a wave, which moves on the line into the substrate-integrated waveguide, detaches from the radiating element, in which one part of the wave propagates towards an opening of the waveguide, and the other part of the wave propagates towards the resonator element, the other part of the wave that propagates to the resonator element is reflected at the resonator element so as to also propagate towards the waveguide opening, thereby coupling the radar signal into the antenna or into the waveguide.