公开(公告)号：US10939387B2

公开(公告)日：2021-03-02

申请号：US16381946

申请日：2019-04-11

Applicant: Apple Inc.

Inventor： Digvijay Arjunrao Jadhav ,  Indranil S. Sen ,  Jonathan C. King ,  Mohit Narang ,  Prathyusha Sangepu ,  Qiong Wu ,  Shrenik Milapchand ,  Vijay Gadde ,  Yu Chen

IPC: H04W52/26

Abstract: Multi-radio wireless network devices are capable of transmitting and/or receiving data from multiple radiofrequency (RF) networks at different bands. Total transmission power limitations may be in place due to, for example, safety reasons. As a result, active management of transmission power may be performed during simultaneous transmission in different bands and/or networks. In some embodiments, the management may take place on group-by-group basis and a network-by-network basis. Antennas may be grouped based on their relative positions and impact on radiation emitted by the devices.

公开(公告)号：US20210041292A1

公开(公告)日：2021-02-11

申请号：US16536233

申请日：2019-08-08

Applicant: Apple Inc.

Inventor： Chia-Chi Chen ,  Vusthla Sunil Reddy ,  Sireesha Ramisetti ,  Peter M. Agboh ,  Mohit Narang ,  Vijendrakumar K. Ashiwal

IPC: G01J3/42 ,  G01N21/3581

Abstract: Embodiments are disclosed for terahertz spectroscopy and imaging in dynamic environments. In an embodiment, a transmitter of an electronic device emits a continuous electromagnetic (EM) wave in the terahertz (THz) frequency band into a dynamic environment that includes a transmission medium that changes over time. A receiver of the electronic device, receives an EM wave reflected off an object in the environment and determines a spectral response of the reflected EM wave. The spectral response includes absorption spectra at a frequency in the THz frequency band that is indicative of a known target transmission medium. The absorption spectra of the target transmission medium and a path length of the reflected EM wave signal are used to obtain the concentration level of the target transmission medium from a reference library of known concentration levels.

公开(公告)号：US20200326790A1

公开(公告)日：2020-10-15

申请号：US16913948

申请日：2020-06-26

Applicant: Apple Inc.

Inventor： Bing Jiang ,  Blake R. Marshall ,  Indranil S. Sen ,  Liquan Tan ,  Reza Nasiri Mahalati ,  Yi Jiang ,  Mohit Narang

IPC: G06F3/0354 ,  H02J50/05 ,  H04B5/00 ,  G06F3/041

Abstract: A wireless power transmission system may include a wireless power transmitting device such as a tablet computer and a wireless power receiving device such as a computer stylus. A wireless power transmitting capacitor electrode may be formed in the tablet computer. A wireless power receiving capacitor electrode may be formed in the computer stylus. The transmitting capacitor electrode may be driven by a drive signal having a frequency of 900 MHz or greater to produce wireless power. The wireless power may be transmitted from the transmitting capacitor electrode to the receiving capacitor electrode on the stylus via near field capacitive coupling. The transmitting and receiving capacitor electrodes may each include conductive traces on dielectric substrates. The conductive traces may follow meandering paths to maximize the possible capacitive coupling efficiency between the capacitor electrodes and thus the end-to-end charging efficiency of the wireless power transmission system.

公开(公告)号：US10681773B2

公开(公告)日：2020-06-09

申请号：US16238750

申请日：2019-01-03

Applicant: APPLE INC.

Inventor： Lei Li ,  Xiaojun Chen ,  Vusthla Sunil Reddy ,  Peter M. Agboh ,  Mohit Narang

IPC: H04W88/04 ,  H04L5/00 ,  H04W84/18 ,  H04W72/08 ,  H04W72/04 ,  H04W88/06 ,  H04W4/80 ,  H04L1/00

Abstract: Exemplary embodiments include a system having a first wireless audio output device and a second wireless audio output device. One of the first or second audio output devices is configured to one of connect as a slave to a source device in a first piconet and connect as a master to the other one of the first or second audio output devices in a second piconet. The one of the first or second wireless audio output devices determines whether an audio packet transmitted by the source device via the first piconet was received by the first wireless audio output device and the second wireless audio output device, and, when at least one of the first wireless audio output device or the second wireless audio output device did not receive the audio packet, the audio packet is exchanged between the first and second wireless audio output devices via the second piconet.

公开(公告)号：US10651670B1

公开(公告)日：2020-05-12

申请号：US15491899

申请日：2017-04-19

Applicant: Apple Inc.

Inventor： Bing Jiang ,  Indranil S. Sen ,  Mohit Narang ,  Mun Soo Bae

IPC: H02J7/02 ,  H02J50/40 ,  H02J50/80 ,  H02J50/23 ,  H02J50/12 ,  H04B5/00

Abstract: An electronic device may transfer power wirelessly to an external device. The electronic device may include a housing having a cavity. A cover layer may be formed over the cavity. An array of antennas may be formed within the cavity. Antennas in the array may transfer wireless charging signals to the external device through the cover layer to charge the external device while the external device is in contact with the cover layer. Impedance detection circuitry may gather impedance matching information from each antenna in the array. Control circuitry may select an antenna having a best impedance match with the external device for transmitting the wireless charging signals. One or more antennas in the array may form a block filter for the selected antenna. Multiple near-field coupled antennas in the array may be selected for transmitting the charging signals to focus the charging signals on the external device.

公开(公告)号：US20200092191A1

公开(公告)日：2020-03-19

申请号：US16133943

申请日：2018-09-18

Applicant: Apple Inc.

Inventor： Alejandro J. Marquez ,  Shang-Te Yang ,  Mohit Narang ,  Indranil S. Sen ,  Joachim S. Hammerschmidt ,  Hung Kwan Oscar Au ,  Dineshan Poopalaratnam

IPC: H04L12/26 ,  H04W24/08 ,  H04W72/04

Abstract: Methods for a data-less ranging procedure may include initiating a ranging procedure via a polling message transmitted at a first time and receiving response messages at second and third times. The time intervals between the first and second time and the second and third times may be pre-defined. A time of flight may be calculated based on the pre-defined time intervals and the first, second, and third times.

公开(公告)号：US20200091989A1

公开(公告)日：2020-03-19

申请号：US16136031

申请日：2018-09-19

Applicant: Apple Inc.

Inventor： Vijendrakumar K. Ashiwal ,  Dikshit Garg ,  Vijay Gadde ,  Sharad Garg ,  Jia Tang ,  Zhu Ji ,  Mohit Narang ,  Tiberiu Muresan

IPC: H04B7/08 ,  H04B7/0404 ,  H04W36/00 ,  H04W36/30

Abstract: The present disclosure relates to opportunistically selecting an antenna in an electronic device having multiple antennas. A baseband processor of the electronic device may connect to a first cellular tower providing cellular service at a first frequency using a first antenna of the electronic device. The baseband processor may then receive an indication of a handover event to a second cellular tower operating at a second frequency. The baseband processor may determine signal measurements of the second cellular tower for each antenna of the electronic device that is capable of operating at the second frequency. The baseband processor may execute a handover to the second cellular tower using the antenna associated with the best performing signal measurements. In this manner, an antenna may be opportunistically selected based on performance of the antenna, improving operation of the electronic device and quality of cellular service.

公开(公告)号：US10588086B1

公开(公告)日：2020-03-10

申请号：US16217357

申请日：2018-12-12

Applicant: Apple Inc.

Inventor： Sanjeevi Balasubramanian ,  Shiva Krishna Narra ,  Anjaneyulu Maganti ,  Tarik Tabet ,  Lydi Smaini ,  Dhruv Khati ,  Mohit Narang ,  Tiberiu Muresan

IPC: H04W52/02 ,  H04M1/73

Abstract: In a method of device-to-device communication, efficient power management is provided when a primary device has a low battery level. The primary device can send synchronization signals and discovery messages to secondary devices by looping through a sequence of transmit power values in a sequence of consecutive frames, where the sequence of transmitting values includes a default power value and a reduced power value.

公开(公告)号：US20200015169A1

公开(公告)日：2020-01-09

申请号：US16169013

申请日：2018-10-24

Applicant: Apple Inc.

Inventor： Anjaneyulu Maganti ,  Dhruv Khati ,  Lydi Smaini ,  Sanjeevi Balasubramanian ,  Shiva Krishna Narra ,  Tarik Tabet ,  Mohit Narang ,  Tiberiu Muresan

IPC: H04W52/02 ,  H04W4/90 ,  H04W4/70

Abstract: This disclosure relates to techniques and devices for implementing an emergency power save mode (EPSM) in a user equipment device (UE). A UE may enter the EPSM in response to user input. While operating in the EPSM, the UE may power down a display of the UE to preserve battery life and may broadcast an emergency beacon in response to user input to a hardware button of the UE, such as a volume button. The UE may supply sound or haptic feedback in response to broadcasting the emergency beacon.

公开(公告)号：US10517111B2

公开(公告)日：2019-12-24

申请号：US15708746

申请日：2017-09-19

Applicant: APPLE INC.

Inventor： Lei Li ,  Xiaojun Chen ,  Vusthla Sunil Reddy ,  Mohit Narang ,  Qiyang Wu ,  Peter M. Agboh

IPC: H04W4/00 ,  H04W72/12 ,  H04W72/04 ,  H04W84/20 ,  H04W4/80 ,  H04W4/70

Abstract: Exemplary embodiments include a method performed by a wireless device configured as a slave in a first piconet and configured as a master in a second piconet. The method includes determining whether the wireless device has data to transmit over the second piconet to an other wireless device, determining an availability of a full slot in a first piconet schedule, selecting a data transmission scheme based on the availability of the full slot in the first piconet schedule and transmitting the data via the second piconet to the other wireless device in accordance with the selected data transmission scheme.