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232 条记录 (耗时 0.043 秒)

    Tunable filter for LTE bands
    2.
    发明授权
    Tunable filter for LTE bands 有权

    公开(公告)号：US09935760B2

    公开(公告)日：2018-04-03

    申请号：US14230620

    申请日：2014-03-31

    申请人： RF Micro Devices, Inc.

    发明人： Nadim Khlat

    IPC分类号： H04B1/10 ,  H04L5/14 ,  H04B1/00 ,  H04L5/08

    CPC分类号： H04L5/1461 ,  H04B1/006 ,  H04B1/0064 ,  H04B1/1027 ,  H04B2001/1072 ,  H04L5/08 ,  H04L5/14

    摘要： A tunable filter reduces the total number of filters used in TDD (Time-Division Duplex) communication circuitry. The communication circuitry may include a tunable filter and a first switch associated with the tunable filter. The tunable filter may include a tuning component and a filtering component. The tuning component may be located with the first switch on a first die. The filtering component may be located in a laminate underneath the first switch. Power amplifiers for amplifying transmission signals may be located on a second die, and the second die may be located on the laminate.

    CA FDD-FDD and FDD-TDD architecture
    4.
    发明授权
    CA FDD-FDD and FDD-TDD architecture 有权

    公开(公告)号：US09853698B2

    公开(公告)日：2017-12-26

    申请号：US14991090

    申请日：2016-01-08

    申请人： RF Micro Devices, Inc.

    发明人： Nadim Khlat

    IPC分类号： H04B1/38 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04L5/00 ,  H04B7/0413

    CPC分类号： H04B7/0413 ,  H04B1/0057 ,  H04B1/38 ,  H04B7/0602 ,  H04B7/0802 ,  H04L5/001 ,  H04L5/0041

    摘要： Radio frequency (RF) front end circuitry includes RF filtering circuitry with first multiplexer circuitry and second multiplexer circuitry. The first multiplexer circuitry is used to pass primary RF transmit and receive signals within one or more frequency division duplexing (FDD) operating bands and diversity multiple-input-multiple-output (MIMO) receive signals within one or more time division duplexing (TDD) operating bands between transceiver circuitry and one or more antennas. The second multiplexer circuitry is used to pass primary RF transmit and receive signals within the one or more TDD operating bands and diversity MIMO receive signals within the one or more FDD operating bands between the transceiver circuitry and the one or more antennas.

    Antenna array calibration for wireless charging
    6.
    发明授权
    Antenna array calibration for wireless charging 有权

    公开(公告)号：US09837712B2

    公开(公告)日：2017-12-05

    申请号：US14843465

    申请日：2015-09-02

    申请人： RF Micro Devices, Inc.

    发明人： Nadim Khlat

    IPC分类号： H01Q3/26 ,  H02J7/02 ,  H02J7/00 ,  H02J50/10 ,  B60L11/18

    CPC分类号： H01Q3/267 ,  B60L11/182 ,  B60L2240/547 ,  B60L2240/549 ,  B60L2270/147 ,  H02J7/0027 ,  H02J7/025 ,  H02J50/10 ,  Y02T10/7011 ,  Y02T10/7072 ,  Y02T90/122 ,  Y02T90/14

    摘要： Antenna array calibration for wireless charging is disclosed. In one aspect, an initial calibration sequence is performed each time a wireless charging station is powered on. The initial calibration sequence utilizes a reference antenna element, which is an antenna element randomly selected from a plurality of antenna elements in the wireless charging station, to determine relative receiver phase errors between the reference antenna element and each of the other antenna elements in an antenna array. In another aspect, a training sequence is performed after completing the initial calibration sequence to determine total relative phase errors between the reference antenna element and each of the other antenna elements in the antenna array. Adjustments can then be made to match respective total relative phase errors among the plurality of antenna elements to achieve phase coherency among the plurality of antenna elements for improved wireless charging power efficiency.

    Radio frequency (RF) front-end without signal switches
    8.
    发明授权
    Radio frequency (RF) front-end without signal switches 有权

    公开(公告)号：US09787353B2

    公开(公告)日：2017-10-10

    申请号：US15099686

    申请日：2016-04-15

    申请人： RF Micro Devices, Inc.

    发明人： Marcus Granger-Jones ,  Dirk Robert Walter Leipold ,  George Maxim ,  Baker Scott ,  Nadim Khlat

    IPC分类号： H04B1/48

    CPC分类号： H04B1/48

    摘要： Disclosed is an RF front-end with improved insertion loss having at least a first resonator with a first port and a second port and at least a second resonator having a third port and a fourth port, wherein the first resonator and the second resonator are magnetically coupled by no more than 5%. Also included is at least one coupling structure coupled between the second port of the first resonator and the third port of the second resonator, wherein the coupling structure has a coupling control input for varying a coupling coefficient between the first resonator and the second resonator such that an RF signal transfer between the first port of the first resonator and the fourth port of the second resonator is controllably variable between 5% and 95%.

    Tunable notch filter
    9.
    发明授权
    Tunable notch filter 有权

    公开(公告)号：US09698839B2

    公开(公告)日：2017-07-04

    申请号：US15006540

    申请日：2016-01-26

    申请人： RF Micro Devices, Inc.

    发明人： Nadim Khlat

    IPC分类号： H04B1/10 ,  H03H9/54 ,  H03H9/64 ,  H03H9/02

    CPC分类号： H04B1/1027 ,  H03H9/54 ,  H03H9/542 ,  H03H9/547 ,  H03H9/6409 ,  H03H2009/02165 ,  H03H2210/012 ,  H03H2210/025 ,  H04B1/1036 ,  H04B2001/1063

    摘要： Circuitry includes an input node, an output node, acoustic filtering circuitry, an inductive element, and a capacitor. The acoustic filtering circuitry includes an acoustic filtering input node and an acoustic filtering output node. The inductive element is coupled in series with the acoustic filtering circuitry between the input node and the output node such that the inductive element is coupled between the input node and the acoustic filtering input node and the acoustic filtering output node is coupled to the output node. The capacitor is coupled in parallel with the acoustic filtering circuitry and the inductive element between the input node and the output node. Providing the inductive element in series with the acoustic filtering circuitry and the capacitor in parallel with the acoustic filtering circuitry and the inductive element provides a highly selective notch filter response between the input node and the output node with high attenuation.