Increasing the Maximum Transmit Power Rating of a Power Amplifier Using a Power Combining Technique
Tom Valencia and Stephane Wloczysiak
Today’s broadband communications use high order modulation transmission scheme that provide higher spectrum efficiency but with a high crest factor [1,2]. As a result, a linear power amplifier (PA) in the transmit chain operates at a significantly backed-off power from compression to meet the linearity performance of error vector magnitude (EVM) and adjacent channel power ratio (ACPR).
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