Decoupling Approach of Superdirective Antenna Arrays
Résumé
—The inter-element distance in superdirective arrays is usually very small and hence the mutual coupling is considerably high. Consequently, these arrays present relatively low efficiencies. In this paper, we propose using decoupling techniques for reducing the mutual coupling, and hence increasing the efficiency, in this kind of arrays. The concept is proven by full wave simulations of two different Electrically Small Antenna (ESA)-based two-element arrays with an inter-element distance of 0.1λ. In the first array with a ka = 0.56, the original (before decoupling) radiation efficiency of 7% is increased to 13.4% and the realized gain is increased from −6.4dBi to −2.6dBi. In the second array with a ka = 1.18, the original radiation efficiency of 52.1% is increased to 63.7% and the realized gain is increased from 3dBi to 3.9dBi.
Domaines
Sciences de l'ingénieur [physics]
Origine : Fichiers produits par l'(les) auteur(s)
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