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.Cheap and easy to manufacture with high accuracy, even for a hobbyist.Description:Cheap and easy to manufacture with high accuracy, even for a hobbyist.Specifications:Center frequency: 5.8 GHz