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    • 2. 发明授权
    • Radiofrequency emission or reception chain with automatic impedance adaptation, and corresponding method
    • 具有自动阻抗适应的射频发射或接收链,以及相应的方法
    • US08543071B2
    • 2013-09-24
    • US13440758
    • 2012-04-05
    • Majid El KaamouchiJean-Baptiste DavidEmeric De Foucauld
    • Majid El KaamouchiJean-Baptiste DavidEmeric De Foucauld
    • H04B17/00H04B1/04
    • H04B1/04H03H7/40
    • As relates to automatic matching of antenna impedance for a radiofrequency transmit or receive circuit, an impedance matching network is inserted between an amplifier and antenna. The current i and output (resp. input) voltage V of the amplifier and their phase shift are measured, the complex impedance defined by V/i is deduced; the impedance of the antenna is calculated as a function of this complex impedance and the known existing values of the adjustable impedances of the matching network. New adjustable values of impedances of the matching network to obtain a desired overall load impedance for the amplifier are calculated on the basis of the calculated antenna impedance value, and the matching network is controlled to adjust the adjustable impedances to these new values. The measurement is made at a measurement frequency different from the working frequency to allow automatic matching without interrupting normal operation of the chain.
    • 关于射频发射或接收电路的天线阻抗的自动匹配,在放大器和天线之间插入阻抗匹配网络。 测量放大器的当前i和输出(相应输入)电压V及其相移,推导出由V / i定义的复阻抗; 根据该复阻抗和匹配网络的可调阻抗的已知现有值计算天线的阻抗。 基于所计算的天线阻抗值计算匹配网络的阻抗的新的可调整值以获得放大器的所需总体负载阻抗,并且控制匹配网络以将可调阻抗调整到这些新值。 在与工作频率不同的测量频率进行测量,以允许自动匹配而不中断链条的正常操作。