公开(公告)号：US20220057476A1

公开(公告)日：2022-02-24

申请号：US17410497

申请日：2021-08-24

Applicant: Google LLC

Inventor： Luzhou Xu ,  Jiang Zhu ,  Jaime Lien ,  David J. Weber

IPC: G01S7/02 ,  G01S13/87 ,  G01S13/30

Abstract: Techniques and apparatuses are described that implement electromagnetic vector sensors (EMVS) for a smart-device-based radar system. Instead of including an antenna array of similar antenna elements, the radar system includes two or more electromagnetic vector sensors. At least one of the electromagnetic vector sensors is used for transmission and at least another of the electromagnetic vector sensors is used for reception. Each electromagnetic vector sensor includes a group of antennas with different antenna patterns, orientations, and/or polarizations. An overall footprint of the two electromagnetic vector sensors (e.g., one for transmission and one for reception) can be smaller than antenna arrays used by other radar systems, thereby enabling the radar system to be implemented within space-constrained devices.

公开(公告)号：US20240168149A1

公开(公告)日：2024-05-23

申请号：US18552622

申请日：2021-03-30

Applicant: Google LLC

Inventor： Aline Eid ,  Jiang Zhu ,  Luzhou Xu ,  Jimmy Georges Donald Hester

IPC: G01S13/56 ,  G01S7/41

CPC classification number: G01S13/56 ,  G01S7/415

Abstract: Techniques and apparatuses are described that implement localization and health monitoring. With the use of multiple backscatter tags, a reader can be implemented with a single antenna and have a relatively small footprint compared to other systems that utilize antenna arrays or multiple readers. Also, the backscatter tags can be implemented as passive devices and located at fixed positions. In this way, a single power source can be provided at the reader, and target angular resolutions can be realized without the additional mechanical complexities associated with other moving systems. Additionally, the backscatter tags can be implemented using relatively low-cost commercial off-the-shelf hardware. As such, performance of the reader can be readily customized with the purchase of additional backscatter tags.

公开(公告)号：US11860294B2

公开(公告)日：2024-01-02

申请号：US17410497

申请日：2021-08-24

Applicant: Google LLC

Inventor： Luzhou Xu ,  Jiang Zhu ,  Jaime Lien ,  David J. Weber

IPC: G01S7/02 ,  G01S13/30 ,  G01S13/87

CPC classification number: G01S7/024 ,  G01S13/30 ,  G01S13/87

Abstract: Techniques and apparatuses are described that implement electromagnetic vector sensors (EMVS) for a smart-device-based radar system. Instead of including an antenna array of similar antenna elements, the radar system includes two or more electromagnetic vector sensors. At least one of the electromagnetic vector sensors is used for transmission and at least another of the electromagnetic vector sensors is used for reception. Each electromagnetic vector sensor includes a group of antennas with different antenna patterns, orientations, and/or polarizations. An overall footprint of the two electromagnetic vector sensors (e.g., one for transmission and one for reception) can be smaller than antenna arrays used by other radar systems, thereby enabling the radar system to be implemented within space-constrained devices.