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    • 3. 发明授权
    • System and method for TDD/TMA with hybrid bypass switch of receiving amplifier
    • 具有接收放大器混合旁路开关的TDD / TMA系统和方法
    • US08295212B2
    • 2012-10-23
    • US12536184
    • 2009-08-05
    • Paul CarneyJing Wang
    • Paul CarneyJing Wang
    • H04J3/00H04L12/66
    • H04B1/401H03F3/72H04B1/48H04B1/52
    • An arrangement of hybrid couplers, selectively removing RF amplifiers from a receiving path from an antenna back to a receiver in response to an event, the event switching impedances of switchable impedances connecting to ports of the hybrid couplers, between a matching impedance and mismatching impedance. The matching and mismatching impedances change coupling characteristics of the hybrid couplers between a normal coupling and a bypass coupling. In the normal coupling the hybrid couplers provide port-to-port coupling placing the RF amplifiers within the receiving path and, in the bypass coupling, the hybrid couplers provide port-to-port coupling bypassing the RF amplifiers. Optionally, transmitted signal power is detected to identify transmit and receiving intervals. During detected transmit intervals, isolation switches isolate the RF amplifiers from the feedback path and, during receiving intervals and, during detected receiving intervals, the isolation switches RF amplifiers into the feedback path to amplify reception signals. Optionally a hybrid coupler switch is placed between the two circulators to increase the isolation in the RX mode reducing feedback to the LNA's.
    • 混合耦合器的布置,响应于事件,从匹配阻抗和不匹配阻抗之间的连接到混合耦合器的端口的可切换阻抗的事件切换阻抗,选择性地将RF放大器从天线接收回接收器。 匹配和不匹配的阻抗在正常耦合和旁路耦合之间改变混合耦合器的耦合特性。 在正常耦合中,混合耦合器提供将RF放大器放置在接收路径内的端口到端口耦合,并且在旁路耦合中,混合耦合器提供绕过RF放大器的端口到端口耦合。 可选地,检测发射信号功率以识别发射和接收间隔。 在检测到的发射间隔期间,隔离开关将RF放大器与反馈路径隔离,并且在接收间隔期间,并且在检测到的接收间隔期间,隔离开关RF放大器进入反馈路径以放大接收信号。 可选地,混合耦合器开关放置在两个循环器之间以增加RX模式中的隔离,从而减少对LNA的反馈。
    • 4. 发明申请
    • SYSTEM AND METHOD FOR TDD/TMA WITH HYBRID BYPASS SWITCH OF RECEIVING AMPLIFIER
    • 用于接收放大器的混合旁路开关的TDD / TMA的系统和方法
    • US20110032854A1
    • 2011-02-10
    • US12536184
    • 2009-08-05
    • Paul CarneyJing Wang
    • Paul CarneyJing Wang
    • H04L5/14H04B1/44
    • H04B1/401H03F3/72H04B1/48H04B1/52
    • An arrangement of hybrid couplers, selectively removing RF amplifiers from a receiving path from an antenna back to a receiver in response to an event, the event switching impedances of switchable impedances connecting to ports of the hybrid couplers, between a matching impedance and mismatching impedance. The matching and mismatching impedances change coupling characteristics of the hybrid couplers between a normal coupling and a bypass coupling. In the normal coupling the hybrid couplers provide port-to-port coupling placing the RF amplifiers within the receiving path and, in the bypass coupling, the hybrid couplers provide port-to-port coupling bypassing the RF amplifiers. Optionally, transmitted signal power is detected to identify transmit and receiving intervals. During detected transmit intervals, isolation switches isolate the RF amplifiers from the feedback path and, during receiving intervals and, during detected receiving intervals, the isolation switches RF amplifiers into the feedback path to amplify reception signals. Optionally a hybrid coupler switch is placed between the two circulators to increase the isolation in the RX mode reducing feedback to the LNA's.
    • 混合耦合器的布置,响应于事件,从匹配阻抗和不匹配阻抗之间的连接到混合耦合器的端口的可切换阻抗的事件切换阻抗,选择性地将RF放大器从天线接收回接收器。 匹配和不匹配的阻抗在正常耦合和旁路耦合之间改变混合耦合器的耦合特性。 在正常耦合中,混合耦合器提供将RF放大器放置在接收路径内的端口到端口耦合,并且在旁路耦合中,混合耦合器提供绕过RF放大器的端口到端口耦合。 可选地,检测发射信号功率以识别发射和接收间隔。 在检测到的发射间隔期间,隔离开关将RF放大器与反馈路径隔离,并且在接收间隔期间,并且在检测到的接收间隔期间,隔离开关RF放大器进入反馈路径以放大接收信号。 可选地,混合耦合器开关放置在两个循环器之间以增加RX模式中的隔离,从而减少对LNA的反馈。