J. Valleau, H. Aubert, O. Ripoche, A. Bellion, P. Potier, P. Pouliguen
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Pre-fractal resonant rings for compact spiral antennas
This paper addresses the miniaturization of an Archimedean spiral antenna by using stacked pre-fractal metallic rings. Such rings are electromagnetically coupled to spiral antennas in order to reduce the diameter of the radiating elements. A methodology for selecting a very compact pre-fractal profile is reported. For experimental validation the fabrication of spiral antennas incorporating the selected pre-fractal rings is in progress by using flexible substrate and ink-jet printing technology.