an antenna assembly for a cellular telephone , includes a solid dielectric core , and a two - terminal balanced antenna assembly , including an electrical conductor on the solid dielectric core ; the electrical conductor being configured and dimensioned to be matched to the operating frequency band of the cellular telephone communication band and terminating at each of its opposite ends in a common feed point connection such as to provide a two - terminal balanced antenna assembly having an isotropic radiation pattern and reduced electromagnetic field radiation . in two described embodiments , the electrical conductor is configured to define two orthogonal coils ; and in a third described embodiment , it is configured to define an electrically - conductive wire extending axially through the core , and an electrically - conductive helix extending around the outer surface .