RADIO FREQUENCY POWER AMPLIFIERS

摘要

A radio frequency power amplifier amplifies an input signal at an input port, and produces an output signal at an output port. The power amplifier may include one or more amplifier stages. An amplifier stage may include an active device, and a feedback network. The feedback network may include one or more reactive elements configured to resonate at a predetermined frequency, to provide an impedance match at the input to the amplifier stage, and to provide an impedance match at the output of the amplifier stage. In some example implementations, the input and output impedance matching is caused by biasing the active device to produce a transconductance at least one of equal to or greater than a critical transconductance.

主权项

1. An apparatus comprising:
a first transmission line carrying a signal to an input port of a power amplifier, the power amplifier producing an output signal at an output port, the power amplifier comprising an amplifier stage further comprising: an active device, and a feedback network comprising one or more reactive elements configured to resonate at a predetermined frequency, to provide a first impedance match at an input to the amplifier stage, and to provide a second impedance match at an output of the amplifier stage, the first impedance match and the second impedance match configured by at least biasing the active device to produce a transconductance at least one of equal to or greater than a critical transconductance.