The Triple Feed Patch antenna is a directional circularly polarized antenna. Good radiation efficiency. Most FR4-based patches have poor efficiency because FR4 is lossy at 5.8 GHz. Good axial ratio, both directly perpendicular to the patch and off-center. Easy to manufacture with high accuracy. Center frequency: 5.8 GHz Bandwidth: 660 MHz (5.47 – 6.13 GHz) Matching: S11 less than –20 dB, VSWR less than 1.22 (at center frequency) Axial ratio: less than 1.3 Antenna gain: 9.4 dBi Half power beam width: 55° (horizontal and vertical) Radiation efficiency: 83.5% Color: As shown Material: Plastic + Metal Package Contents: 1 x Directional circularly polarized antenna (RP-SMA bore) Note: Light reflection and different displays may cause slight color variation between the image and the actual item. Measurement tolerance: ±1–3 cm.