1MA289: Outphasing, Envelope & Doherty Transmitter Test & Measurement

Energy efficiency of RF Frontends (RFFE), especially transmitters, continues to gain greater prominence. Meeting the efficiency challenge 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. This signal construction in effect, means that such architectures use predictive, post-correction linearization. Their predictive nature enables distortion to be (in theory) completely eliminated, irrespective of the non-linear properties of the individual signal paths.

The capabilities of multi-channel signal synthesis setups with R&S®SMW200A at their heart, in combination with the accuracy of R&S®FSW analyzer and versatility gained by its dedicated analysis personalities ease development of these types of transmitters, and make the instruments a future-proof investment - regardless of which transmitter architecture is developed.

The document focusses on devices for the 3.5 GHz NR (5G New Radio) candidate band, but its findings can easily be transposed to use in K-band satellite applications or mmW NR candidate bands, where efficiency is an even more crucial design target with non-negotiable linearity constraints.

Name Type Language Version Date Size
1MA289_1e_Outph_Doh_Enve_Tx.pdf Application Note English 1e 16.08.2017 3 MB
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