公开(公告)号：US11946996B2

公开(公告)日：2024-04-02

申请号：US16917852

申请日：2020-06-30

Applicant: Apple Inc.

Inventor： Michael Kerner ,  John Zhonghua Wu ,  Michael Delishansky ,  Zohar Agon ,  Shachar Shayovitz ,  Michael Ney ,  Shay I. Freundlich

IPC: G01S13/28 ,  G01S13/46 ,  G01S13/48 ,  G06F3/0354

CPC classification number: G01S13/282 ,  G01S13/48 ,  G06F3/03545 ,  G01S2013/468

Abstract: Accuracy for detecting and tracking one or more objects of interest can be improved using radar-based tracking systems. In some examples, multiple radars implemented in a device can be used to transmit signals to, and receive signals from, the one or more objects of interest. To disambiguate an object of interest from undesired objects such as the hand of a user, the object of interest can include a transponder that applies a delay element to a signal received from a radar, and thereafter transmits a delayed return signal back to the radar. The delay produced by the delay element can separate the return signal from undesired reflections and enable disambiguation of those signals. Clear identification of the desired return signal can lead to more accurate object distance determinations, more accurate triangulation, and improved position detection and tracking accuracy.

公开(公告)号：US20230003867A1

公开(公告)日：2023-01-05

申请号：US17364590

申请日：2021-06-30

Applicant: Apple Inc.

Inventor： Avihay Yehezkel ,  Michael Kerner ,  Michael Delishansky ,  Michael Ney ,  Shachar Shayovitz ,  Zohar Agon

IPC: G01S13/34 ,  G01S13/58 ,  G01S7/35

Abstract: An electronic device may include wireless circuitry with sensing circuitry that transmits radio-frequency sensing signals and receives reflected radio-frequency sensing signals. A mixer may generate a series of beat signals based on the sensing signals and the reflected sensing signals. The sensing circuitry may generate a beat phase based on an average of the series of beat signals, a set of phase values based on the series of beat signals, and a phase velocity based on the set of phase values. The sensing circuitry may resolve a phase ambiguity in the beat phase based on the phase velocity to identify a range between the electronic device and an external object. This way may allow the sensing circuitry to generate accurate ranges even in a low signal-to-noise ratio regime, such as when the external object is moving relative to the electronic device.

公开(公告)号：US12044769B2

公开(公告)日：2024-07-23

申请号：US17364590

申请日：2021-06-30

Applicant: Apple Inc.

Inventor： Avihay Yehezkel ,  Michael Kerner ,  Michael Delishansky ,  Michael Ney ,  Shachar Shayovitz ,  Zohar Agon

IPC: G01S13/34 ,  G01S7/35 ,  G01S13/58

CPC classification number: G01S13/34 ,  G01S7/354 ,  G01S13/584

Abstract: An electronic device may include wireless circuitry with sensing circuitry that transmits radio-frequency sensing signals and receives reflected radio-frequency sensing signals. A mixer may generate a series of beat signals based on the sensing signals and the reflected sensing signals. The sensing circuitry may generate a beat phase based on an average of the series of beat signals, a set of phase values based on the series of beat signals, and a phase velocity based on the set of phase values. The sensing circuitry may resolve a phase ambiguity in the beat phase based on the phase velocity to identify a range between the electronic device and an external object. This way may allow the sensing circuitry to generate accurate ranges even in a low signal-to-noise ratio regime, such as when the external object is moving relative to the electronic device.

公开(公告)号：US20230296751A1

公开(公告)日：2023-09-21

申请号：US18068990

申请日：2022-12-20

Applicant: Apple Inc.

Inventor： Mark G. Forbes ,  Ran Forte ,  Michael Delishansky ,  Michael Kerner ,  Bernhard Sogl ,  Jochen Schrattenecker

IPC: G01S13/36 ,  G01S7/35 ,  H01Q3/36

CPC classification number: G01S13/36 ,  G01S7/354 ,  H01Q3/36 ,  G01S7/356

Abstract: An electronic device may include wireless circuitry with a transmit antenna and a receive antenna. Signal bursts may be transmitted by the transmit antenna. A phase shifter may be toggled between a first state that applies a first phase shift and a second state that applies a second phase shift to the signal bursts. The second phase shift may be approximately 180 degrees out-of-phase with the first phase shift. A receive path may receive first reflected signals while the phase shifter is in the first state and second reflected signals while in the second state. The first and second reflected signals may be used to cancel the effects of on-chip leakage or DC offset to recover a signal-of-interest associated with reflection of the signal bursts off an external object. The signal-of-interest may be used to detect a range to the external object.