Multi-band power amplifier

摘要

A power amplifier (20) for operation in at least a first and a second frequency band, wherein a center frequency f2 of the second frequency band is higher than a center frequency f1 of the first frequency band, is disclosed. The power amplifier (20) comprises a transistor (35) for amplifying an input signal of the power amplifier (20) and an output coupling network (45) for connecting the power amplifier to a resistive load (55). The output coupling network (45) is operatively connected to an output terminal (40) of the transistor (35), has an output terminal (50) for connection to said resistive load (55), and is configured such that, when the power amplifier (20) is connected to said resistive load (55), the power amplifier (20) is arranged to operate in class F for frequencies in one of the first and the second frequency bands, and operate in inverse class F for frequencies in the other one of the first and the second frequency band. A related radio transmitter circuit (10) and a related radio-communication apparatus (1,2) are also disclosed.

主权项

1. A power amplifier for operation in at least a first frequency band and a second frequency band, the power amplifier comprising:
a transistor for amplifying an input signal of the power amplifier; and an output coupling network operatively connected to an output terminal of the transistor and having its own output terminal for connecting the power amplifier to a resistive load; wherein the output coupling network is configured such that, when the power amplifier is connected to the resistive load, the power amplifier is configured to:
operate in class F for frequencies in one of the first frequency band and the second frequency band; andoperate in inverse class F for frequencies in the other of the first frequency band and the second frequency band; wherein a center frequency f2 of the second frequency band is higher than a center frequency f1 of the first frequency band; and wherein a ratio between f2 and f1 is 1.5.