Method and apparatus for controlling an output voltage in a power amplifier

A manufacturing method for power amplifier (PA) apparatus comprising:

• providing for a PA device having a maximum operating frequency, the PA device for being operated to generate an output current comprising a fundamental component at a fundamental frequency that is less than the maximum operating frequency and a plurality of harmonic components at different harmonic frequencies of the fundamental frequency and for generating an output voltage based on the output current;
• coupling to the PA device a first matching circuit designed to correspond to the fundamental component;
• and
• coupling between the PA device and the first matching circuit a second matching circuit designed to correspond to at least one of the harmonic components, wherein the first and second matching circuits are designed to maintain the PA output voltage at a value that is no more then a predetermined maximum value, which is less than a breakdown voltage for the PA device.