Meeting the efficiency challenge of RF front ends (RFFE) is increasingly difficult at higher operating frequencies and bandwidths, such as those proposed for 5G. There is a group of transmitter RFFE architectures whose signal output is constructed from two, or more, efficiently generated components. The architecture of their signal construction uses predictive, post-correction linearization. Their predictive nature enables distortion to be completely eliminated.
The document focusses on devices for the 3.5 GHz NR (5G New Radio) candidate band. The same findings are equally applicable to applications such as K-band satellite or mmW NR candidate bands, where efficiency is an even more crucial design target. It provides in depth discussions of the capabilities of multi-channel signal synthesis setups with R&S SMW200A and FSW analyzer for transmitter measurement and development.