Effects of a phantom hand on a non-resonant element for a 2.5 GHz smartwatch antenna

Aurora Andújar, Yolanda Cobo, Jaume Anguera

    Producció científica: Article en revista indexadaArticleAvaluat per experts


    Smartwatches with wireless connectivity are becoming widely used and therefore, antenna engineering efforts are addressed to obtain small and efficient antenna systems. Since the space in a smartwatch is considerably small compared to other wireless devices, a non-resonant element of 12.0 mm × 3.0 mm × 2.4 mm for 2.4–2.5 GHz antenna system operation is proposed herein on a 30 mm × 30 mm ground plane. The ground clearance area is 14 mm × 5 mm, which leaves more space for facilitating the integration of other electronic components in the reduced ground plane area available for this kind of applications. Since the element is non-resonant, a matching network is used to match the antenna system when regarding the presence of a phantom hand. Several distances between the ground plane and the phantom hand are analyzed, from touching position to 6 mm distance. For each case, a new matching has been designed without the need of modifying the geometry of the antenna element. Measured total efficiency is in average (2.4–2.5 GHz) 15.1% for the worst case (touching position) and increases up to 37.0% for the 6 mm case. These results are of practical interest to design smartwatch devices.

    Idioma originalAnglès
    Pàgines (de-a)1-7
    Nombre de pàgines7
    RevistaAEU - International Journal of Electronics and Communications
    Estat de la publicacióPublicada - de gen. 2019


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