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An accurate modeling technique for antennas and nonlinear RF power amplifier mixed simulation

Published online by Cambridge University Press:  27 September 2011

Georges Zakka El Nashef ,
François Torrès ,
Sébastien Mons ,
Tibault Reveyrand ,
Edouard Ngoya ,
Thierry Monédière ,
Marc Thévenot  and
Raymond Quéré
Georges Zakka El Nashef*
Affiliation:
XLIM – C2S2/OSA Departments UMR CNRS n°6172, University of Limoges 123, Avenue Albert Thomas, 87060 Limoges Cedex, France. Tel: +33 5 55457735; Fax: +33 5 55457766.
François Torrès
Affiliation:
XLIM – C2S2/OSA Departments UMR CNRS n°6172, University of Limoges 123, Avenue Albert Thomas, 87060 Limoges Cedex, France. Tel: +33 5 55457735; Fax: +33 5 55457766.
Sébastien Mons
Affiliation:
XLIM – C2S2/OSA Departments UMR CNRS n°6172, University of Limoges 123, Avenue Albert Thomas, 87060 Limoges Cedex, France. Tel: +33 5 55457735; Fax: +33 5 55457766.
Tibault Reveyrand
Affiliation:
XLIM – C2S2/OSA Departments UMR CNRS n°6172, University of Limoges 123, Avenue Albert Thomas, 87060 Limoges Cedex, France. Tel: +33 5 55457735; Fax: +33 5 55457766.
Edouard Ngoya
Affiliation:
XLIM – C2S2/OSA Departments UMR CNRS n°6172, University of Limoges 123, Avenue Albert Thomas, 87060 Limoges Cedex, France. Tel: +33 5 55457735; Fax: +33 5 55457766.
Thierry Monédière
Affiliation:
XLIM – C2S2/OSA Departments UMR CNRS n°6172, University of Limoges 123, Avenue Albert Thomas, 87060 Limoges Cedex, France. Tel: +33 5 55457735; Fax: +33 5 55457766.
Marc Thévenot
Affiliation:
XLIM – C2S2/OSA Departments UMR CNRS n°6172, University of Limoges 123, Avenue Albert Thomas, 87060 Limoges Cedex, France. Tel: +33 5 55457735; Fax: +33 5 55457766.
Raymond Quéré
Affiliation:
XLIM – C2S2/OSA Departments UMR CNRS n°6172, University of Limoges 123, Avenue Albert Thomas, 87060 Limoges Cedex, France. Tel: +33 5 55457735; Fax: +33 5 55457766.
*
Corresponding author: G. Zakka El Nashef Email: georges.zakka-el-nashef@xlim.fr
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Abstract

The design of agile active antennas requires an efficient modeling methodology in order to quantify the impact of other components on the array radiation pattern, and especially the influence of power amplifiers (PA). Therefore, the performance prediction of PA on TX chains is of prime importance. This article describes two different approaches for active antenna applications. The first one concentrates on PA macro-modeling, which takes into account a large output load impedance mismatch with a voltage standing wave ratio up to 4:1. A PA behavioral model based on nonlinear scattering functions was developed and extracted from CW measurements. The model validity was checked by comparison with the measured data. The second one describes a novel technique for synthesizing a given radiation pattern, whereas taking into account the mutual coupling and calculated matching impedances (ZL ≠ 50 Ω) of each antenna in the array according to frequency and pointing angle.

Keywords

Active phased array antennasBehavioral modelingImpedance mismatchElectromagnetic interactions
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 3 , Issue 6 , December 2011 , pp. 647 - 655
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2011

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