Second Order Extension of Power Amplifiers Behavioral Models for Accuracy Improvements - Archive ouverte HAL
Communication Dans Un Congrès Année : 2010

Second Order Extension of Power Amplifiers Behavioral Models for Accuracy Improvements

Georges Zakka El Nashef
  • Fonction : Auteur
  • PersonId : 917999
OSA
François Torres
OSA
Sébastien Mons
Tibault Reveyrand
Thierry Monédière
  • Fonction : Auteur
  • PersonId : 915601
OSA
Edouard Ngoya
  • Fonction : Auteur
  • PersonId : 917715

Résumé

In the design process of reconfigurable radars, it is required to study the interaction between antennas and the power amplifiers in order to quantify the distortion and predict the performances of power amplifier (PA) on TX-chains. This paper presents an accurate behavioral model for PAs, based on nonlinear scattering functions, which allows taking into account large output loading impedance mismatches, i.e. Voltage Standing Wave Ratio (VSWR) up to four. First application presented is a black box modeling technique limited to Taylor first order expansion dedicated to moderate VSWR (VSWR 3). Unfortunately, the first order model is not efficient enough, so a second application is presented, showing an accurate model expanded to Taylor second order in the case of large VSWR (VSWR > 3) which allows predicting circuit performances at system level and establishes a mixed simulation tool for a bilateral communication between amplifiers and antennas.
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Dates et versions

hal-00624755 , version 1 (19-09-2011)

Identifiants

  • HAL Id : hal-00624755 , version 1

Citer

Georges Zakka El Nashef, François Torres, Sébastien Mons, Tibault Reveyrand, Thierry Monédière, et al.. Second Order Extension of Power Amplifiers Behavioral Models for Accuracy Improvements. European Microwave Week (EuMW 2010), poster session, Sep 2010, Paris, France. pp.1030-1033. ⟨hal-00624755⟩

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