The antenna set that started the revolution and spawned copy after copy. The Bluebeam Line of Antennas were the first Circularly Polarized antennas made available to FPV pilots way back in 2011.
Cloverleaf (3-Lobe) Skew-Planar Wheel (4-lobe)
Gain: 1.4dbic Gain: 0.92dbic
Axial Ratio: .61 Axial ratio: .54
Polarization: Right Hand Circular (RHCP)