Chapter Four

Advanced Architecture of Doherty Amplifier


When the Doherty amplifier is designed based on the identical two amplifiers, the first peak-efficiency point is located at the fixed 6 dB back-off power. However, to get a higher efficiency for amplification of the highly modulated signal, the point should be located at a larger back-off point, or the efficiency can be even higher by increasing the number of the maximum efficiency points. These behaviors can be achieved from the N-way Doherty amplifier and the N-stage Doherty amplifier. The design methods and the problems for implementation of these amplifiers are discussed. It is also shown that the N-way Doherty amplifier can be used as a highly linear amplifier by tuning ...

Get Doherty Power Amplifiers now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.