A dielectric dual antenna (300) intended especially for small-sized radio apparatuses, with one partial antenna (310) of which is implemented the lower operating band of the antenna and with the second partial antenna (320) the upper operating band. The partial antennas have a shared feed point (FP) in the antenna structure, e.g. at the end of a radiating element (312) of one partial antenna, in which case the other partial antenna receives its feed galvanically through said radiating element by a short intermediate conductor (332). The partial antennas are located so that their substrates (311, 321) are heads face to face, and the main directions of the radiating elements i.e. the conductive coatings of the substrates starting from the shared feed point are opposing. The tunings of the partial antennas corresponding to different operating bands are obtained independent from each other without discrete matching components.