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专利名称：RF power amplifier linearization using
parallel RF power amplifiers havingintermod-complementing predistortionpaths
发明人：Lance T. Mucenieks,Charles S.
Robertson,Brent L. Irvine,Nemy Salvador
申请号：US09/195536申请日：19981118公开号：US06111462A公开日：20000829
摘要：An RF power amplifier linearization architecture has a pair of matched RFamplifiers, RF signal paths through which are intercoupled with a phase and amplitudemeasurement and predistortion mechanism. By selectively combining the RF output of amain path RF power amplifier with the RF input signal supplied to a parallel path RFpower amplifier, the predistortion control mechanism of the invention predistorts the RFinput signal applied to the parallel path amplifier, so that it includes the same modulatedRF carrier component as that applied to the main path amplifier, as well as a
complementary version of the intermodulation component of the output of the mainpath amplifier. The predistortion for each amplifier is controlled such that the resultingRF output signals produced by the matched amplifier pair will have the desired RF carriermodulation component but equal amplitude and phase-reversed intermodulationcomponents. Combining these two matched amplifier outputs in a quadrature hybridproduces a composite signal, in which the desired amplified modulated RF carrier
components produced by each matched amplifier constructively sum, while unwantedIMD components cancel.
申请人：MUCENIEKS; LANCE T.,ROBERTSON; CHARLES S.,IRVINE; BRENT L.,SALVADOR;NEMY
代理人：Charles E Wands
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