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Comptes Rendus Physique
Volume 10, n° 1
pages 13-21 (janvier 2009)
Doi : 10.1016/j.crhy.2008.12.006
Real-time 3D electromagnetic field measurement instrument with direct visualization
Instrument de mesure à visualisation directe en 3D et temps réel du champ électromagnétique

Jean Rioult, Marc Heddebaut , Divitha Seetharamdoo, Virginie Deniau
French National Institute for Transport and Safety Research (INRETS), LEOST, 20, rue Elisée-Reclus, BP 317, 59666 Villeneuve d’Ascq cedex, France 

Corresponding author.

Nowadays, a wide variety of terminals are proposed to nomadic users. Generally these terminals provide wireless communication operating at frequencies between one and a few GHz. For technical reasons, including multiple access to the communication channel and battery autonomy, these terminals transmit only during very short periods i.e. transmission bursts. For a direct observation of certain characteristics of the transmitted signals radiated by such terminals, only a few measurement setups exist. This article proposes such a novel real-time 3D electromagnetic field measurement instrument with direct visualization. The prototype used for validation is based on an array of probes regularly attached on a non-conductive rigid loop which is put into fast rotation around the terminal under test. To cite this article: J. Rioult et al., C. R. Physique 10 (2009).

The full text of this article is available in PDF format.

De nombreux terminaux sont actuellement proposés aux usagers nomades. Ces équipements sont souvent dotés d’une capacité de communication sans fil fonctionnant entre un et quelques GHz. Pour des raisons techniques, dont l’accès multiple au canal de transmission et l’autonomie des batteries embarquées, ces terminaux n’émettent que de brèves fractions du temps, sous la forme de salves d’émission. Afin d’observer directement certaines caractéristiques des signaux rayonnés par ces équipements, peu d’appareillages de mesure s’avèrent disponibles. Cet article décrit un nouveau système de visualisation temps réel du champ électromagnétique émis. Le prototype de validation utilise un réseau de sondes maintenues régulièrement espacées sur une boucle isolante mise en rotation rapide autour de l’équipement sous test. Pour citer cet article : J. Rioult et al., C. R. Physique 10 (2009).

The full text of this article is available in PDF format.

Keywords : Antenna radiation pattern, Electromagnetic compatibility, Electric field measurement, Transient radiation, Electronic equipment testing, Probe

Mots-clés : Diagramme de rayonnement d’antennes, Compatibilité électromagnétique, Mesure de champ électrique, Rayonnement transitoire, Equipement de mesure, Sonde

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