A first independent unit includes a support substrate with an integrated network of electrical connections. An electronic integrated circuit chip is mounted above a front face of the support substrate. A second independent unit includes a dielectric support. The second independent unit is stacked above the first independent unit on a side of the front face of the first independent unit. An electromagnetic antenna includes an exciter element and a resonator element. The exciter element provided at the support substrate. The resonator element is provided at the dielectric support.