US 12,332,371 B2
Electronic radar device
Ehsan Foroozanfard, Malmö (SE); and Mikael Egard, Malmö (SE)
Assigned to Acconeer AB, Malmö (SE)
Appl. No. 18/001,221
Filed by Acconeer AB, Malmö (SE)
PCT Filed Jun. 8, 2021, PCT No. PCT/EP2021/065324
§ 371(c)(1), (2) Date Dec. 8, 2022,
PCT Pub. No. WO2021/250016, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 20178985 (EP), filed on Jun. 9, 2020.
Prior Publication US 2023/0228843 A1, Jul. 20, 2023
Int. Cl. G01S 7/03 (2006.01); G01S 7/02 (2006.01); G01S 7/06 (2006.01); G01S 13/88 (2006.01); H01Q 1/24 (2006.01); H01Q 1/38 (2006.01); H01Q 15/08 (2006.01)
CPC G01S 7/032 (2013.01) [G01S 7/028 (2021.05); G01S 7/06 (2013.01); H01Q 1/24 (2013.01); H01Q 1/38 (2013.01); H01Q 15/08 (2013.01); G01S 13/88 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A radar device comprising:
a printed circuit board, PCB, comprising a ground plane,
a radar sensor chip package mounted on the PCB and comprising a mmWave radio frequency, RF, integrated circuit and a planar antenna structure configured as an antenna-in-package and oriented in a plane parallel to the ground plane, wherein the mmWave RF integrated circuit is configured to output a mmWave signal to be transmitted by the planar antenna structure, and
a cavity, wherein the radar sensor chip package is arranged in the cavity, the cavity having an open side, and the cavity being defined by a conductive rear wall surface opposite the open side, a pair of mutually opposite and conductive sidewall surfaces, a conductive top surface, and a conductive bottom surface, wherein at least a portion of the conductive bottom surface is formed by at least a portion of the ground plane of the PCB, and wherein the sidewall surfaces, the top surface, and the bottom surfaces each extends from the rear wall surface towards the open side of the cavity,
wherein a width dimension (W) and a height dimension (H) of the cavity are such that a mm Wave signal output by the mm Wave RF integrated circuit and transmitted by the planar antenna structure excites at least one resonant mode of the cavity.