| 摘要 |
The present invention relates to an envelope tracking RF power amplifier unit (80), comprising: an RF power transistor unit (20) for amplification of an RF input signal (RF in), and an envelope tracking modulator (100) for feeding a supply voltage (Drain supply) to the RF power transistor unit (20), wherein the RF power transistor unit (20), preferably also the envelope tracking modulator (100), is unpackaged, and wherein the envelope tracking modulator (100) and the RF power transistor unit (20) are arranged on a common circuit board, in particular on an common RF line card (120). The invention also relates to a base station (300) comprising at least one envelope tracking RF power amplifier unit (80), to a communication network (400) comprising at least one such RF base station, and to a method for power amplification of an RF input signal (RF in). The benefit of this approach is that parasitics caused by a packaged RF power amplifier circuit may be dispensed with, thus allowing to improve overall envelope tracking performance and, possibly, to achieve an improved feeding of a driver transistor stage and of a final transistor stage of the RF power transistor unit by the same modulator (100).
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