This specification covers the ultra high frequency (UHF) Antenna,AS-1735( )/sRc, hereinafter referred to as the antenna, a vertically polarized,four element array,providing omnidirectional azimuth coverage over a frequency range from 225 megahertz (MHz) to 400 MHz when mounted around a central supporting mast ranging from 101.6 millimeters (mm) (4 inches ( in . ) ) to 381.1 mm (15 I n . ) in diameter.