Note:Terminator is not included,you can purchase it separately The Triple Feed Patch antenna is a directional circularly polarized antenna Good radiation efficiency. Most FR4-based patches have terrible efficiency because FR4 is very lossy at 5.8 GHz. Good axial ratio, not just directly perpendicular to the patch but also off-center. Mini version with 45mm diameter :Click Here Specifications: Center frequency: 5.8 GHz Bandwidth: 660 MHz (5.47 – 6.13 GHz) Matching: S11 Axial ratio: Antenna gain: 9.4 dBi Half power beam width: 55° (horizontal and vertical) Radiation efficiency: 83.5% Diameter of large disk : 5.94cm Diameter of small disk: 2.46cm Features: Good radiation efficiency. Most FR4-based patches have terrible efficiency because FR4 is very lossy at 5.8 GHz Good axial ratio, not just directly perpendicular to the patch but also off-center Note: The PCBs must use 1.0 mm thickness FR4 material Package included: 1 x Realacc Triple Feed Patch-1 5.8GHz 9.4dBi Directional Circular Polarized FPV Antenna 1 x SMA Feamale to RP-SMA Male adapter connector