When using other antennas, such as log periodic paddles, maximum energy transfer can only be expected if the receiver paddle is positioned vertically or horizontally, respectively, say Shure. When used as wireless microphone receiver antenna, for example, the helical antenna will transfer maximum RF energy regardless of the polarization of the transmitted wave. As the RF energy from the IEM transmitter radiates out of the helical, it is continuously spun through 360° of polarization, millions of times per foot. The result is crystal clear, drop out free audio at the artists' ears.
Helical antennae are used on virtually every live broadcast special event. Because multipath cancellations and RF dropouts are minimized by using the helical, one can expect more than twice the range over a omnidirectional antenna, say Shure.
(Sarah Rushton-Read)
