Quasi-load insensitive class-E for Doherty and Outphasing Transmitters
Quasi-load insensitive class-E based amplifiers, due to their variable slope operation, are able to provide high efficiency across a large load variation. This feature, combined with their simple output-network topology, allowing: low losses, high bandwidth and very compact realizations, makes quasi-load insensitive class-E an attractive candidate to implement “future” Doherty and outphasing transmitters. This talk discusses the: principles, circuit topologies and optimum dimension of the network elements for this operating class. The theory introduced will be complemented with several examples of very compact, high-performance, quasi-load insensitive class-E Doherty and out-phasing transmitter implementations.