Wideband Power Amplifier Design Through Active Impedance Matching

This talk will discuss broadband high-efficiency power amplifier design based on active impedance matching techniques. While active impedance control is typically used for efficiency enhancement over output power levels, for example in load-modulated power amplifiers such as the Doherty PA, it can also be used to track a desired load impedance over frequency. In practice, a combination of passive and active matching techniques may be a best solution depending on device technology, power level, frequency, etc. These tradeoffs will be discussed and example designs will be presented.