Dynamic signal filter in multi-antenna system

    公开(公告)号:US10164722B1

    公开(公告)日:2018-12-25

    申请号:US14971719

    申请日:2015-12-16

    Abstract: A processing device tracks a frequency hopping sequence implemented by a personal area network (PAN) transmitter in a user device and identifies a set of filter coefficients corresponding to a first frequency of a plurality of frequencies in the frequency hopping sequence, wherein the PAN transmitter is currently transmitting a PAN signal at the first frequency. The processing device configures a tunable notch filter with the set of filter coefficients to cause the filter to remove at least a portion of a PAN component at the current frequency from a combined signal received at a wireless local area network (WLAN) receiver in the user device, the combined signal comprising a WLAN component attributable to a received WLAN signal and the PAN component attributable to the PAN signal.

    Wideband dual-arm antenna with parasitic element
    23.
    发明授权
    Wideband dual-arm antenna with parasitic element 有权
    带寄生元件的宽带双臂天线

    公开(公告)号:US09431717B1

    公开(公告)日:2016-08-30

    申请号:US13926873

    申请日:2013-06-25

    CPC classification number: H01Q1/243 H01Q5/371 H01Q5/378 H01Q9/42

    Abstract: Antenna structures and methods of operating the same of a wideband dual-arm antenna of an electronic device are described. One wideband antenna includes a first feeding arm coupled to a radio frequency (RF) feed and a second feeding arm coupled to the RF feed. At least a portion of the second feeding arm is parallel to the first feeding arm. The wideband dual-arm antenna further includes a third arm coupled to the ground plane. The third arm is a parasitic ground element that forms a coupling to the first feeding arm and the second feeding arm. The parasitic element increases a bandwidth of the wideband antenna.

    Abstract translation: 描述了电子设备的宽带双臂天线的天线结构和操作方法。 一个宽带天线包括耦合到射频(RF)馈电的第一馈送臂和耦合到RF馈送的第二馈送臂。 第二进给臂的至少一部分平行于第一进给臂。 宽带双臂天线还包括耦合到接地平面的第三臂。 第三臂是与第一进给臂和第二进给臂形成联接的寄生接地元件。 寄生元件增加了宽带天线的带宽。

    Antenna with adjustable electrical path length
    25.
    发明授权
    Antenna with adjustable electrical path length 有权
    天线可调电路长度

    公开(公告)号:US09196953B1

    公开(公告)日:2015-11-24

    申请号:US14552339

    申请日:2014-11-24

    Abstract: Antenna structures and methods of operating an antenna of an electronic device are described. A system may include an antenna comprising a plurality of physically connected elements. The elements may include a respective electrical switch and may have a respective first electrical path length when the electrical switch is in a non-conductive state and a respective second electrical path length when the electrical switch is in a conductive state. The system may further include an antenna controller to receive information indicative of an operating frequency and to configure the antenna to have a total electrical path length corresponding to the operating frequency by operating the switches.

    Abstract translation: 描述了操作电子设备天线的天线结构和方法。 系统可以包括包括多个物理连接的元件的天线。 元件可以包括相应的电开关,并且当电开关处于非导通状态时可以具有相应的第一电路径长度,并且当电开关处于导通状态时可以具有相应的第二电路径长度。 系统还可以包括天线控制器,用于接收指示工作频率的信息,并且通过操作开关将天线配置为具有对应于工作频率的总电路长度。

    Radio frequency biosensor with integrated compensation

    公开(公告)号:US12156716B1

    公开(公告)日:2024-12-03

    申请号:US17155485

    申请日:2021-01-22

    Abstract: Data about concentration of one or more types of molecules present within a human body are determined noninvasively using radio frequency (RF) signals. Signals at several different frequencies at very low power levels are emitted using an antenna mounted to a wearable device. Operating values, such as changes to the impedance of the antenna resulting from interaction between the RF signals and the user, are associated with the concentration of one or more types of molecules within the user. These changes in impedance may be relatively small. Circuitry in the device determines internal impedance of the circuitry, compensating for internal impedances and improving overall accuracy of the measured impedance resulting from interaction with the user.

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