Well... It is a Bi-Pole. Look at the voltage distribution along the half-wave radiator, at any given time, one end is more positive than the other. Since the difference between Bi-Pole and Di-pole is whether we're speaking Greek or Latin, a bipolar antenna is a dipolar antenna. W8JI on at least one occasion referred to an end fed half wave as also an "end-fed dipole" ; http://www.w8ji.com/end-fed_1_2_wave_matching_system_end feed.htm Romeo and Juliet, Act II, Scene II -- William Shakespeare "...What's in a name? that which we call a rose by any other name would smell as sweet..."