Helical wire antenna normal mode or axis mode?
With this kind of helix, the energy is radiated in all directions (mostly) perpendicular to the axis of the helix.

There is a different kind of helical antenna that's sometimes used to produce circularly-polarized signals, but for that to work, the dimensions of the helix must be comparable to the wavelength in quesion. Specifically, the circumference of the helix needs to be &lambda; and the turn spacing needs to be &lambda;/4. Such an antenna radiates its energy along the axis of the helix, in the direction away from the feed point.