This model 1010 is a stand-alone microwave octave horn antenna designed for use in Immunity testing within the frequency range of 1-2GHz. Linearly polarised, with medium gain, and a nominal VSWR over the recommended operating frequency range. It can be used easily with a fixed antenna factor over the range. AF: 25dBs average and a gain of 16.8dBi.Mounting is with a 5/8unc skt. on two 90 degree positioned threads.