Patent ID: 9374041
Filing Date: 2016-06-21
CPC Classification: H03F

Claim Text:
1. A multi-way Doherty power amplifier, DPA, comprising: a first path comprising a carrier amplifier and a first carrier amplifier segment CA 1 partitioned from the carrier amplifier, the first path configured for performance optimization at a low power region and a first peak efficiency point; a second path comprising a second carrier amplifier segment CA 2 partitioned from the carrier amplifier and a first peaking amplifier PA1, the second path being configured for performance optimization at a high power region and at a second peak efficiency point; a power splitter for splitting an input power signal to the second carrier amplifier segment CA 2 and the first peaking amplifier PA1 separately; a signal preparation unit configured for generating separately input power signal for the first path and each of the second path, and configured for adaptively aligning phases of signals in the first path and in the second path; and an impedance inverting network configured for combining output signal power from each path.