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Modern wireless systems often support multi-standards with spectrum-efficient modulation schemes such as 64QAM and 256QAM and high data-rates. This poses stringent requirements on RF Power Amplifiers (PAs) for their carrier bandwidth, linearity, modulation rate, and efficiency. Several multiband Analog PAs (APAs) and Digital PAs (DPAs) are recently reported. However, multiband APAs often suffer from...
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