Patent ID: 8299857

Claim:
An RF power amplifier, comprising: an input transmission line adapted to receive an input RF signal; a transistor adapted to amplify the input RF signal to generate an output RF signal; a first input impedance matching network coupled between the input transmission line and an input of the transistor, wherein the first impedance matching network is adapted to improve an input impedance matching between the input transmission line and the input of the transistor for a defined frequency range; a resistive element coupled between the first input impedance matching network and the input of the transistor, wherein the resistive element is adapted to lower a quality factor (Q) of the first input impedance matching network to improve the impedance matching for the defined frequency range; an output transmission line adapted to produce the output RF signal; an output impedance matching network coupled between an output of the transistor and the output transmission line, wherein the output impedance matching network is adapted to improve an output impedance matching between the output of the transistor and the output transmission line for the defined frequency range; and a second input impedance matching network coupled between the resistive element and the input of the transistor, wherein the second impedance matching network is adapted to improve an input impedance matching between the input transmission line and the input of the transistor for the defined frequency range.