High effeciency rf transmitter system using non-linear amplifiers

摘要: An RF transmitter with improved efficiency and good linearity decomposes an input AM signal into two envelopes phased modulation at a phase angle t. The has three principal embodiments. A first solution uses least one added amplifier for each decomposed envelope or more amplifiers having low gain compared to that of high in another branch the same envelope. ti is determined corresponds switching on 2n + 2 total branches, n = 0, 1, 2,.... second general schematic architecture as classic LINC system requires only amplifiers, but different decomposition because are used their nonlinear zone. can be variable. amplified output allows combiner 100% major part signal. third combines solutions.