US 11,749,900 B2
Radar standing wave dampening components and systems
Dipankar Ghosh, Oakdale, MN (US); Jaewon Kim, Woodbury, MN (US); Stephen J. Etzkorn, Woodbury, MN (US); Ronald D. Jesme, Plymouth, MN (US); Mohsen Salehi, Woodbury, MN (US); Guanglei Du, Horseheads, NY (US); and John A. Wheatley, Stillwater, MN (US)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Appl. No. 17/44,054
Filed by 3M Innovative Properties Company, St. Paul, MN (US)
PCT Filed Apr. 4, 2019, PCT No. PCT/IB2019/052758
§ 371(c)(1), (2) Date Sep. 30, 2020,
PCT Pub. No. WO2019/193528, PCT Pub. Date Oct. 10, 2019.
Claims priority of provisional application 62/654,127, filed on Apr. 6, 2018.
Prior Publication US 2021/0050673 A1, Feb. 18, 2021
Int. Cl. H01Q 1/42 (2006.01); H01Q 17/00 (2006.01); G01S 7/03 (2006.01); H01Q 1/32 (2006.01); H01Q 1/38 (2006.01); H05K 1/02 (2006.01); G01S 7/02 (2006.01)
CPC H01Q 17/004 (2013.01) [G01S 7/03 (2013.01); H01Q 1/3233 (2013.01); H01Q 1/38 (2013.01); H01Q 1/421 (2013.01); H05K 1/0237 (2013.01); G01S 7/027 (2021.05)] 16 Claims
OG exemplary drawing
 
1. A radar standing wave dampening system, comprising: a mount including a printed circuit board; a radio wave generating unit disposed on the mount; a radio wave sensing unit disposed on the mount; a non-target interface at a fixed distance from the radio wave generating unit, wherein the non-target interface has a relative permittivity for the frequency range of the radio waves greater than 1; and a gradient permittivity tape comprising an array of at least one of cones and pyramids disposed on the non-target interface; wherein the printed circuit board is a multilayer stack, and at least one layer includes an absorber composite including at least one of ceramic filler, magnetic filler, or conductive filler materials.