Complex sentence: A discone antenna is omnidirectional, vertically polarized and wideband--allowing frequency ranges of up to 10:1, and its radiation pattern in the horizontal plane is quite narrow, making its sensitivity highest in the plane parallel to the Earth.
Split into simpler sentences: A discone antenna is omnidirectional, vertically polarized and exceptionally wideband, offering coverage of frequency ranges up to a ratio of 10:1. The radiation pattern in the horizontal plane is quite narrow, making its sensitivity highest in the plane parallel to the Earth.