สายอากาศแพท 5.8GHz Triple Feed Patch Antenna SMA / SMA Directional Circular Polarized Antenna for FPV Fatshark Goggles RC drone ขั้วเดือยเกลียวใน

5.8GHz Triple Feed Patch Antenna SMA Directional Circular Polarized Antenna for FPV Racing Drone

Feature: The FPV triple transport 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 only directly perpendicular to the patch but also off-center. Cheap and easy to manufacture with high accuracy, even for a hobby. Specifications: Material: Plastic Size: 60 * 60 * 99mm Color: Black Net weight: 20g Center frequency: 5.8 GHz Bandwidth: 660 MHz (5.47-6.13 GHz) Matching: S11 <-20 dB, VSWR <1.22 (in the middle frequency) Axial ratio: <1.3 Antenna gain: 9.4 dBi Half power beam width: 55 ° (horizontal and vertical) Radiation efficiency: 83.5% Function: transmit / receive Package information: Package size: 15.5 * 9 * 1.5cm / 6.1 * 3.5 * 0.6in