US 11,962,083 B2
Radar sensor with radome having trenches for reducing coupling between transmit and receive antennas
Majid Ahmadloo, Lowell, MA (US)
Assigned to Veoneer US, LLC, Southfield, MI (US)
Filed by Veoneer US, LLC, Southfield, MI (US)
Filed on Jan. 31, 2022, as Appl. No. 17/589,056.
Application 17/589,056 is a continuation of application No. 16/448,302, filed on Jun. 21, 2019, granted, now 11,264,712.
Prior Publication US 2022/0158341 A1, May 19, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01Q 1/52 (2006.01); H01Q 1/32 (2006.01); H01Q 1/38 (2006.01); H01Q 1/42 (2006.01); H01Q 21/06 (2006.01)
CPC H01Q 1/525 (2013.01) [H01Q 1/3233 (2013.01); H01Q 1/38 (2013.01); H01Q 1/42 (2013.01); H01Q 21/065 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A radar sensor module, comprising:
a transmit antenna array disposed along a transmit antenna axis;
a receive antenna array disposed along a receive antenna axis;
a radome over the transmit antenna array and the receive antenna array, such that a gap is disposed below the radome and above the transmit antenna array and the receive antenna array, such that a portion of radiation emitted from the transmit antenna array can propagate in the gap; and
a trench formed in an underside of the radome to penetrate the underside of the radome and extend into the radome and being electromagnetically coupled to the gap, the trench extending along a trench axis between the transmit antenna axis and the receive antenna axis and extending uninterrupted between the transmit antenna array and the receive antenna array, the trench being sized, shaped and positioned with respect to the gap such that the portion of radiation emitted from the transmit antenna array is substantially prevented from propagating toward the receive antenna array;
wherein the trench is sized, shaped and positioned to act as a waveguide stub electromagnetically coupled to the gap, such that the trench is configured as an electromagnetic stop at an operating frequency of the radar sensor module, wherein the operating frequency of the radar sensor module is in the range of 76 GHz to 77 GHz.