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    DUPLEXER MEASUREMENT AND TUNING SYSTEMS
    1.
    发明公开
    DUPLEXER MEASUREMENT AND TUNING SYSTEMS 审中-公开

    公开(公告)号：US20240080063A1

    公开(公告)日：2024-03-07

    申请号：US17939657

    申请日：2022-09-07

    申请人： Apple Inc.

    发明人： Christof Pfannenmüller ,  Dominic Koehler ,  Julian W Zuber ,  Oliver Georg Dorn ,  Bjoern Lenhart ,  Harald Pretl ,  Rastislav Vazny ,  Christian F Tanzer

    IPC分类号： H04B1/50 ,  H03H7/48 ,  H04B1/04 ,  H04B1/10

    CPC分类号： H04B1/50 ,  H03H7/487 ,  H04B1/0475 ,  H04B1/1027

    摘要： Systems and methods combine a test signal with a wanted (downlink or uplink) signal at an input of a duplexer of a communication device, and receive the test signal at an output of the duplexer. The test signal may include a radio frequency signal having less power than the wanted signal to avoid interference, or a digital signal that is added to or extracted from the wanted signal when the wanted signal does not have a radio frequency. A processor of the communication device causes the duplexer to operate in a tuning state (e.g., to transmit signals having a transmission frequency and receive signals having a receive frequency). The measurement system determines a difference or ratio in power between the test signal at the duplexer output and the duplexer input, and adjusts the tuning state based on the difference or ratio (e.g., to decrease or minimize the difference or ratio).

    Duplexer and mobile communication device using the same
    4.
    发明授权
    Duplexer and mobile communication device using the same 有权

    公开(公告)号：US06525626B2

    公开(公告)日：2003-02-25

    申请号：US09867163

    申请日：2001-05-29

    申请人： Harufumi Mandai ,  Jun Sasaki ,  Noboru Kato ,  Sadayuki Matsumura ,  Hiroaki Tsumori

    发明人： Harufumi Mandai ,  Jun Sasaki ,  Noboru Kato ,  Sadayuki Matsumura ,  Hiroaki Tsumori

    IPC分类号： H01P1213

    CPC分类号： H03H7/487 ,  H01P1/2135 ,  H03H7/46

    摘要： A duplexer includes a branch circuit connected to an antenna and arranged to branch to a receiving side and a transmitting side, a receiving-side LC parallel resonant-type filter connected to the receiving-side of the branch circuit and arranged to cause a reception signal to be passed and a transmission signal to be attenuated, a surface acoustic wave filter connected to the receiving-side LC parallel resonant-type filter defining a subsequent stage of the receiving-side LC parallel resonant-type filter and arranged to cause the reception signal to be passed and the neighborhood of the high-frequency side of the reception signal to be attenuated, and a transmitting-side LC parallel resonant-type filter connected to the transmitting-side of the branch circuit and arranged to cause the transmission signal to be passed and the reception signal to be attenuated.