What happens to the radiation pattern of an unterminated long wire antenna as the wire length is increased?

An unterminated long wire antenna is essentially a resonant wire that is at least one wavelength long. Because it is unterminated, standing waves form along its length, resulting in a complex radiation pattern composed of multiple lobes and nulls. As you increase the length of the wire relative to the operating frequency's wavelength, the number of standing wave segments increases. This directly causes additional radiation lobes to form. Furthermore, as the wire gets longer, the geometry of the wave interference dictates that the major (strongest) lobes pull tighter toward the wire itself. Instead of radiating effectively off the broadside (perpendicular) edge, the main lobes become increasingly aligned with the axis of the long wire antenna.