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I. La-figure, 26 rappelle le coefficient de réflexion de la structure de base simulé sur la

L. Comme-le-montre and . Fig, IV.26, l'antenne de base fonctionne à deux fréquences de résonance. La première fréquence F R = 1.55 GHz, correspond à la résonance de l'élément parasite inductance chargée, tandis que la seconde résonance est située à F M = 2.45 GHz

I. La-figure, 27 représente les diagrammes de rayonnement 2D simulés pour les quatre configurations étudiées aux fréquences de résonance dans le plan (XOY)

. Dans-le-cas-de-la-fig, IV.27-b, on obtient quatre directions de faisceaux différentes séparées par un angle de 90 °. A l " état A, l'antenne rayonne vers la direction des Y-négatifs

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