On-die harmonics filtering for radio frequency power amplifiers

A power amplifier architecture for connecting a transceiver generating a radio frequency (RF) signal defined by a carrier fundamental frequency to an antenna including an input port and an output port comprising:

• an input matching circuit connected to the input port;
• an output matching circuit connected to the output port;
• an amplifier circuit including at least one amplifier active device with a first terminal connected to the input matching segment and a second terminal connected to the output matching segment;
• and
• a first harmonic feedback circuit connected across the amplifier active device, voltage components of emissions of one or more harmonic frequencies of the carrier fundamental frequency generated by the amplifier active device being fed back with opposite phase to the first terminal of the amplifier active device by the first harmonic feedback circuit;
• wherein a negative feedback at a level correlated with a gain level of the amplifier active device at the one or more harmonic frequencies of the carrier fundamental frequency is defined, and the negative feedback is minimized at the carrier fundamental frequency.