The ATH6G18A from AR RF/Microwave Instrumentation is a Horn Antenna with Frequency 6 to 18 GHz, Gain 19 to 25 dBi, E Plane 7 to 17 Degrees, H Plane 9 to 18 Degrees, Power 3 kW. Tags: Pyramidal Horn Antenna. More details for ATH6G18A can be seen below.