The EMCO model 3161-03 is the third of a set of three horn antennas designed for use in Immunity testing within the frequency range of 4-8GHz. Linearly polarised, with medium gain, half power beamwidth (equal in both horizontal and vertical planes) and a very low VSWR over the recommended operating frequency range. They can be used easily with a fixed antenna factor over the range. AF: 28.3dBs and a gain of 17.5dBi. The 22 degree beamwidth in both polarisation planes is ideally suited to illuminate larger EUTs.