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5.8 GHz ISM Band

Wi-Fi 802.11a/n/ac/ax (5 GHz band) · FPV drone video links · Microwave backhaul

Frequency Range5.725–5.875 GHz
Wavelength5.2 cm
ITU / StandardISM Band

Applications

  • Wi-Fi 802.11a/n/ac/ax (5 GHz band)
  • FPV drone video links
  • Microwave backhaul
  • DSRC vehicle-to-vehicle (5.9 GHz adjacent)
  • Outdoor point-to-point links

Propagation Characteristics

Less congested than 2.4 GHz ISM. Worse building penetration than 2.4 GHz. Free-space path loss ~7.7 dB higher than 2.4 GHz at same distance.

Regulatory Notes

Overlaps with Wi-Fi 5 GHz UNII bands. FCC: 200 mW–1W depending on sub-band. DFS (Dynamic Frequency Selection) required in most channels.

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