SYSTEMS AND METHODS FOR ADJUSTING MAGNETIC FIELD DISTRIBUTION USING FERROMAGNETIC MATERIAL
    61.
    发明申请
    SYSTEMS AND METHODS FOR ADJUSTING MAGNETIC FIELD DISTRIBUTION USING FERROMAGNETIC MATERIAL 有权
    使用纤维材料调整磁场分布的系统和方法

    公开(公告)号:US20160072296A1

    公开(公告)日:2016-03-10

    申请号:US14478461

    申请日:2014-09-05

    Abstract: A uniform magnetic field may provide better performance in wireless power transmitters due to smaller impedance variations in an output of a power amplifier of a wireless power transmitter and also allow for wireless power transmitter pads to be thinner. One aspect of the disclosure provides a device for wireless power transfer. The device comprises a substantially planar transmit antenna that is configured to generate a magnetic field. The device also comprises a pad having a charging surface. At least a portion of the transmit antenna is disposed in the pad. The device also comprises a ferromagnetic material having a shape and a position relative to the transmit antenna. At least one of the shape or position of the ferromagnetic material, or a combination thereof, is selected to modify a distribution of the magnetic field at the charging surface.

    Abstract translation: 由于无线电力发射机的功率放大器的输出端的阻抗变化较小,无线功率发射器的均匀磁场可以提供更好的性能,并且还允许无线功率发射器焊盘更薄。 本公开的一个方面提供了一种用于无线电力传送的装置。 该装置包括被配置为产生磁场的基本上平面的发射天线。 该装置还包括具有充电表面的垫。 发射天线的至少一部分设置在垫中。 该装置还包括具有相对于发射天线的形状和位置的铁磁材料。 选择铁磁材料的形状或位置中的至少一个或其组合来修改充电表面处的磁场分布。

    Antenna Assembly with a Conductive Cage

    公开(公告)号:US20220077586A1

    公开(公告)日:2022-03-10

    申请号:US17016196

    申请日:2020-09-09

    Abstract: An apparatus is disclosed for an antenna with a conductive cage. In an example aspect, the apparatus includes a ground plane with at least one opening. The apparatus also includes at least one antenna assembly with at least one radiating element, at least one feed via, and a conductive cage. The radiating element is implemented on a first plane that is substantially parallel to the ground plane. The feed via is connected to the at least one radiating element and is configured to connect to at least one transmission line through the opening. The conductive cage includes at least three ground vias, which are connected to the ground plane at positions that are distributed around the opening. Lengths of the at least three ground vias extend a portion of a distance between the ground plane and the radiating element.

    Wireless power transfer through a metal object

    公开(公告)号:US10381875B2

    公开(公告)日:2019-08-13

    申请号:US14616021

    申请日:2015-02-06

    Abstract: A method and system for providing wireless power transfer through a metal object is provided. In one aspect, an apparatus for wirelessly receiving power via a magnetic field is provided. The apparatus includes a metal cover including an inner portion and an outer portion. The outer portion is configured to form a loop around the inner portion of the metal cover. The outer portion is configured to inductively couple power via the magnetic field. The apparatus includes a receive circuit electrically coupled to the outer portion and configured to receive a current from the outer portion generated in response to the magnetic field. The receive circuit is configured to charge or power a load based on the current.

    Ultrasonic fingerprint sensor with acoustic shielding

    公开(公告)号:US10275634B2

    公开(公告)日:2019-04-30

    申请号:US15461310

    申请日:2017-03-16

    Abstract: Disclosed are methods, devices, apparatuses, and systems for ultrasonic fingerprint sensing with an acoustic shielding structure. One or more layers in an ultrasonic fingerprint sensing system may reflect back ultrasonic waves due to acoustic impedance mismatch that can distort a fingerprint image. An acoustic shielding structure may be configured to absorb, store, trap, or otherwise attenuate ultrasonic waves. The acoustic shielding structure may be positioned underlying an ultrasonic sensor layer. In some implementations, the acoustic shielding structure may include a plurality of periodically spaced apart geometric features or holes in a medium.

    Wireless Power-transmission Shield
    68.
    发明申请

    公开(公告)号:US20190069452A1

    公开(公告)日:2019-02-28

    申请号:US15687237

    申请日:2017-08-25

    Inventor: Seong Heon Jeong

    Abstract: The present disclosure describes aspects of a wireless power-transmission shield for a wireless charger. The wireless charger includes a wireless power transmitter configured to generate an alternating magnetic field at a charging frequency. As a result of the alternating magnetic field, a spurious electromagnetic field is further generated at a spurious frequency different than the charging frequency. The wireless charger includes a shield having an associated conductivity or an associated impedance. The shield is configured to be substantially transparent to the alternating magnetic field based on the charging frequency and the associated conductivity of the shield or the associated impedance of the shield. The shield is further configured to be lossy to the spurious electromagnetic field based on the spurious frequency and the associated conductivity of the shield or the associated impedance of the shield.

    Methods and apparatus for out of phase field mitigation

    公开(公告)号:US10033226B2

    公开(公告)日:2018-07-24

    申请号:US14975524

    申请日:2015-12-18

    Abstract: This invention describes a method and apparatus for providing wireless power. The methods and systems disclosed consist of a first coil having at least one loop forming an inner area inside boundaries of the at least one loop and an outer area outside the boundaries of the at least one loop, the first coil configured to generate a first alternating magnetic field for charging or powering a wireless power device, the first alternating magnetic field having a first magnetic field component with a first phase in the inner area, the first alternating magnetic field also having a second magnetic field component with a second phase in the outer area, and the second phase different from the first phase. In some aspects, the methods and systems comprise a second coil comprising a portion within the outer area, the second coil configured to reduce a magnitude of the second magnetic field component.

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