... field, obtaining a series of parameters, such as antenna gain, Front-Back Ratio, half-power point beamwidth, zero ... measurement, analysis and calculation, and get a high-precision result quickly.In the diagram: 1 - antenna bracket , 2 - 2D positioner , 3 ... positioner's control cables , 8 - RF cables , 9 - source antenna ,10 - tested antenna , 11 - vector network analyzer , 12 - printer , 13 - ...