The DRG-118-A-WR is a linearly-polarized wide-band double-ridged horn antenna. It is designed to transmit or receive in the frequency band from 1 GHz to 18 GHz with high transmit power capability. The antenna may be used with its typical antenna factor characteristic to make approximate field strength measurements. Greater accuracy requires individual calibration. The antenna has a fiberglass water-resistant radome built onto it in order to weatherproof it for outdoor use.