Limiti di potenza Wi-Fi

In 2025, the maximum Wi-Fi transmit power (measured in dBm) and expected received signal strengths are determined by regulatory guidelines and advances in Wi-Fi technology, especially with the adoption of new bands like 6GHz and the rollout of Wi-Fi 7.

• For Wi-Fi in the 6GHz band (such as Wi-Fi 6E and Wi-Fi 7), draft regulations in key markets (such as India’s 2025 draft rules) specify the following limits for device transmit power:

  • Low Power Indoor: maximum 30 dBm e.i.r.p. (Equivalent Isotropically Radiated Power), with a spectral density of 5 dBm/MHz.
  • Very Low Power Outdoor: maximum 14 dBm e.i.r.p., with a spectral density of -5 dBm/MHz ^[3].

• Previously, for 5GHz indoor/outdoor Wi-Fi, regulations commonly allowed up to 30 dBm e.i.r.p. as well, subject to local rules ^[6].

• The dBm value you see in Wi-Fi signal measurements typically refers to signal received strength (RSSI):

  • Excellent: -30 dBm to -50 dBm (very close to the router).
  • Good: -60 dBm to -67 dBm (suitable for streaming and VoIP).
  • Weak/unusable: worse than -70 dBm ^{[5] [9]}.

• Wi-Fi 7 (802.11be), rolling out in 2025, enables higher throughput and wider channels (up to 320MHz), but fundamental transmit power limits are still set by regulators to prevent interference ^{[1] [2] [3]}.

• For consumer and enterprise deployment in 2025, expect the same or similar dBm maxima (30 dBm e.i.r.p. for main indoor routers/APs), with new technologies like Wi-Fi 7 further improving data rates, spectral efficiency, and device densities rather than drastically increasing power levels ^{[1] [2] [3]}.

Caveat: The exact permissible dBm settings can vary by country and frequency band, and some markets may have additional restrictions for outdoor/portable/IoT Wi-Fi devices ^{[3] [6]}.