SEMICONDUCTOR POWER AMPLIFIER

摘要

A semiconductor power amplifier comprises an input-side amplifier for inputting and amplifying an input signal, a balanced amplifier which is connected to an output terminal of the input-side amplifier, comprises two hybrid couplers and a plurality of power amplifiers, passes the input signal, and converts a reflective wave into thermal energy, and an output-side amplifier which is connected to an output terminal of the balanced amplifier and amplifies an output signal.

主权项

1. A semiconductor power amplifier comprising:
an input-side semiconductor amplifier for amplifying an input signal; a balanced amplifier connected to an output terminal of the input-side amplifier; and an output-side semiconductor amplifier connected to an output terminal of the balanced amplifier, wherein the balanced amplifier comprises: a first hybrid coupler which has a sum port as a first input/output terminal, a difference port as a second input/output terminal, a third input/output terminal and a fourth input/output terminal and in which the output terminal of the input-side amplifier is connected to the SUM port; a first termination resistor connected to the difference port of the first hybrid coupler; a first semiconductor amplifier connected to the third input/output terminal of the first hybrid coupler; a second semiconductor amplifier connected to the fourth input/output terminal of the first hybrid coupler; a second hybrid coupler which has a sum port as a first input/output terminal, a difference port as a second input/output terminal, a third input/output terminal and a fourth input/output terminal and in which an output terminal of the first semiconductor amplifier is connected to the fourth input/output terminal, an output terminal of the second semiconductor amplifier is connected to the third input/output terminal, and an input terminal of the output-side semiconductor amplifier is connected to the sum port; and a second termination resistor connected to the difference port of the second hybrid coupler.