Doherty amplifier arrangement

摘要

A Doherty amplifier (1) is described which comprises an input terminal (102) for receiving an input signal (101) and an output terminal (103) for providing an amplified signal (104) of the input signal (101). The Doherty amplifier (1) comprises a carrier amplifier stage (300) with a first signal input (311) and a second signal input (312) and a peak amplifier stage (400) with a third signal input (411) and a fourth signal input (421). A signal splitter (200) splits and delays the input signal (101) so that the signal at the first signal input (311) and the signal at the second signal input (321) are 180° apart in phase and that the signal at the third signal input (421) and the fourth signal input (431) are also 180° apart in phase.

主权项

1. A Doherty amplifier arrangement having an input terminal for receiving an input signal and having at least one output terminal for providing an amplified signal of the input signal, further comprising:
a signal splitter for splitting the input signal into a first signal component, a second signal component that is substantially 90° apart in phase in relation to the first signal component, a third signal component that is substantially 180° apart in phase in relation to the first signal component and a fourth signal component, that is substantially 270° apart in phase in relation to the first signal component, a carrier amplifier comprising a first carrier amplifier input, a second carrier amplifier input, a first carrier amplifier output for providing a first carrier amplifier output signal, and a second carrier amplifier output for providing a second carrier amplifier output signal, a peak amplifier comprising a first peak amplifier input, a second peak amplifier input, a first peak amplifier output for providing a first peak amplifier output signal, and a second peak amplifier output for providing a second peak amplifier output signal a signal combiner for combining the first carrier amplifier output signal, the second carrier amplifier output signal, the first peak amplifier output signal, and the second peak amplifier output signal in phase, whereby the signal combiner comprises a first inductor with a first inductor terminal and a second inductor terminal, a first capacitor with a first capacitor terminal and a second capacitor terminal, a second inductor with a third inductor terminal and a fourth inductor terminal, a second capacitor with a third capacitor terminal and a fourth capacitor terminal wherein the second inductor terminal is connected to the first capacitor terminal, the second capacitor terminal is connected to the third inductor terminal, the fourth inductor terminal is connected to the third capacitor terminal, the fourth capacitor terminal is connected to the first inductor terminal.