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公开(公告)号：US20220381895A1
公开(公告)日：2022-12-01
申请号：US17331504
申请日：2021-05-26
Applicant: Apple Inc.
Inventor： Joonhoi Hur , Andreas Menkhoff , Bernhard Sogl , Jochen Schrattenecker , Rastislav Vazny
Abstract: An electronic device may include wireless circuitry having a set of two or more antennas coupled to voltage standing wave ratio (VSWR) sensors. The VSWR sensors may gather VSWR measurements from radio-frequency signals transmitted using the set of antennas. The antennas may be disposed on one or more substrates and/or may be formed from conductive portions of a housing. Control circuitry may process the VSWR measurements to identify the ranges between each of the antennas in the set of antennas and an external object. The control circuitry may process the ranges to identify an angular location of the external object with respect to the device. The control circuitry may adjust subsequent communications based, adjust the direction of a signal beam produced by a phased antenna array, identify a user input, or perform any other desired operations based on the angular location.
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Patent Agency Ranking
公开(公告)号：US11502707B2
公开(公告)日：2022-11-15
申请号：US17230090
申请日：2021-04-14
Applicant: Apple Inc.
Inventor： Andreas Langer , Christoph Hepp , Andreas Menkhoff , Gunther Kraut
Abstract: Systems, circuitries, and methods for predistorting a digital signal in a transmit chain based on a predistortion function are provided. A method includes shifting a center frequency of an input signal by an offset to generate an adapted signal; predistorting the adapted signal based on a predistortion function to generate a predistorted adapted signal; reverting the shifting of the center frequency of the predistorted adapted signal by the offset to generate a predistorted signal; and causing transmission of the predistorted signal by a transmit chain.
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公开(公告)号：US20220291338A1
公开(公告)日：2022-09-15
申请号：US17200311
申请日：2021-03-12
Applicant: Apple Inc.
Inventor： Joonhoi Hur , Bernhard Sogl , Jochen Schrattenecker , Andreas Menkhoff , Bin Xiao , Lucas Calderin , Andre Hanke , Harald Pretl , Rastislav Vazny
Abstract: An electronic device may include a processor and wireless circuitry with transmit and receive antennas. Radar circuitry may use the transmit and receive antennas to perform spatial ranging on external objects farther than a threshold distance (e.g., 1-2 cm) from the transmit antenna. The wireless circuitry may include a voltage standing wave ration (VSWR) sensor coupled to the transmit antenna to detect the presence of objects within the threshold distance from the transmit antenna. This may serve to cover a blind spot for the radar circuitry near to the transmit antenna. The VSWR sensor may gather background VSWR measurements when other wireless performance metric data for the wireless circuitry is within a predetermined range of satisfactory values. The background VSWR measurements may be subtracted from real time VSWR measurements to perform accurate and robust ultra-short range object detection near to the transmit antenna.
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公开(公告)号：US20210234564A1
公开(公告)日：2021-07-29
申请号：US17230090
申请日：2021-04-14
Applicant: Apple Inc.
Inventor： Andreas Langer , Christoph Hepp , Andreas Menkhoff , Gunther Kraut
Abstract: Systems, circuitries, and methods for predistorting a digital signal in a transmit chain based on a predistortion function are provided. A method includes shifting a center frequency of an input signal by an offset to generate an adapted signal; predistorting the adapted signal based on a predistortion function to generate a predistorted adapted signal; reverting the shifting of the center frequency of the predistorted adapted signal by the offset to generate a predistorted signal; and causing transmission of the predistorted signal by a transmit chain.
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公开(公告)号：US10862428B2
公开(公告)日：2020-12-08
申请号：US16140991
申请日：2018-09-25
Applicant: Apple Inc.
Inventor： Stephan Henzler , Andreas Menkhoff , Thomas Eichler , Wolfgang Walthes , Alexander Belitzer , Yifan Wang
IPC: H03F1/30 , H03F1/02 , H03F3/19 , H03F3/21 , H02M3/07 , H03M1/66 , H03F3/189 , H03F3/24 , H03F3/68 , H02M3/158
Abstract: An envelope tracking system for controlling a power amplifier supply voltage includes envelope circuitry and a feed forward digital to analog converter (DAC) circuitry. The envelope circuitry is configured to generate a target envelope signal based on a selected power amplifier supply voltage. The feed forward DAC circuitry includes a voltage source circuitry and a selector circuitry. The voltage source circuitry is configured to generate a plurality of voltages. The selector circuitry is configured to select one of the plurality of voltages based at least on the target envelope signal. The feed forward DAC circuitry is configured to provide the selected voltage to a supply voltage input of a power amplifier that amplifies a radio frequency (RF) transmit signal.
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公开(公告)号：US20200259561A1
公开(公告)日：2020-08-13
申请号：US16792147
申请日：2020-02-14
Applicant: Apple Inc.
Inventor： Sabine Roessel , Holger Neuhaus , Yeong-Sun Hwang , Bertram Gunzelmann , Andreas Menkhoff , Elmar Wagner , Jong-Kae Fwu , Xiangyang Zhuang
Abstract: Methods and apparatus for communicating in a wireless network including apparatus comprising transceiver circuitry to send and receive data in a plurality of time periods, defined by a time division duplex (TDD) time grid, to another entity, the plurality of time periods corresponding to a plurality of orthogonal frequency division multiplexing (OFDM) symbols and the transceiver circuitry being operable to switch from receive mode to transmit mode and/or from transmit mode to receive mode according to a flexible uplink and downlink allocation of the plurality of time periods; and baseband circuitry coupled to the transceiver circuitry to control the transceiver circuitry to switch during a switching interval embedded within a time period corresponding to an OFDM symbol of the plurality of OFDM symbols.
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