This double-ridged guide horn antenna offers a frequency range of 1 - 18 GHz. The BHA 9118 is a linearly polarized, broadband antenna. The BHA 9118 can be used for both receiving (emissions) and transmitting (immunity) in chambers or open area test sites (OATS). It incorporates a precision "N" connector that provides good power handling capability and low voltage standing wave ratio (VSWR). The antenna has a field strength capability of 250 V/m at 1 m, and a high typical gain of 5.5 - 15 dBi.