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    • 14. 发明申请
    • Method And Apparatus For Signal Power Loss Reduction In RF Communication Systems
    • RF通信系统中信号功率降低的方法和装置
    • US20070072561A1
    • 2007-03-29
    • US11559382
    • 2006-11-13
    • David WeberManolis TerrovitisDavid Su
    • David WeberManolis TerrovitisDavid Su
    • H04B1/44H04B1/02H04M1/00
    • H04B7/04Y02D70/444
    • Multiple power amplifiers in an RF front end are coupled to multiple antennas without diversity switching between the PAs and antennas. Diversity switches direct signals to broadcast by a selected antenna to a PA coupled to the selected antenna. Multiple LNAs are similarly coupled to the diverse antennas. Having one PA and LNA set for each antenna removes the need for diversity switching between the PA/LNAs and each antenna improving signal reception. In one embodiment, a single external PA performs broadcast functions and plural on-chip LNAs are used for reception. In another embodiment, phase shifters are coupled to each PA and LNA, which provide beam forming capability for broadcasts, and in phase signal combinations for received signals.
    • RF前端中的多个功率放大器耦合到多个天线,而无需在PA和天线之间进行分集切换。 分集将直接信号通过所选天线广播到耦合到所选天线的PA。 多个LNA类似地耦合到多个天线。 为每个天线设置一个PA和LNA消除了PA / LNA之间的分集切换和每个天线改善信号接收的需要。 在一个实施例中,单个外部PA执行广播功能,并且多个片上LNA被用于接收。 在另一个实施例中,移相器耦合到每个PA和LNA,其提供用于广播的波束形成能力,以及用于接收信号的相位信号组合。