A Two-Port Nonlinear Dynamic Behavioral Model of RF PAs Subject to Wideband Load Modulation
G.P. Gibiino , Konstanty Łukasik , Paweł Barmuta , Alberto Santarelli , Dominique M. M.-P. Schreurs , Fabio Filicori
AbstractThis work presents a full two-port, i.e., double input-double output, behavioral modeling approach suitable for radio frequency power amplifiers (PAs) in the presence of dynamic load modulation (DLM). The formulation of the model, based on a first-order approximation of a modified Volterra series, accounts for the nonlinear distortion determined by large-signal operation under mismatched conditions, and also for the memory effects stimulated by a modulated PA input signal, or by the dynamic variations of the PA load. By following an exhaustive procedure defined in the frequency domain, the model of a general purpose commercial PA is extracted over 160 MHz of modulation bandwidth (BW) with nonlinear vector network analyzer measurements. Validation results under 20-MHz BW multisine excitation and injected 80-MHz BW multisine load modulation show improved prediction capabilities with respect to quasi-static or single-input descriptions, allowing for reliable system-level simulations in the presence of DLM.
|Journal series||IEEE Transactions on Microwave Theory and Techniques, ISSN 0018-9480|
|Publication size in sheets||0.65|
|Keywords in English||Behavioral modeling, large-signal measurements, load modulation, memory effects, power amplifiers (PAs)|
|ASJC Classification||; ;|
|Project||Research on measurement, circuit and signal theory and electronic circuits and systems. Project leader: Starecki Tomasz,
, Phone: +48 22 234 7744; +48 22 234 3657, start date 05-06-2017, end date 31-10-2018, ISE/2017/DS, Completed
|Score||= 35.0, 17-06-2020, ArticleFromJournal|
|Publication indicators||= 2; = 0; : 2018 = 2.138; : 2018 = 3.756 (2) - 2018=3.864 (5)|
|Citation count*||1 (2019-05-15)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.