Link Budget Calculator
Link Budget Formula
P_RX = P_TX + G_TX − L_TX − FSPL + G_RX − L_RX
FSPL = 20·log₁₀(f) + 20·log₁₀(d) − 147.55 [dB, f in Hz, d in meters]
Link margin = P_RX − Sensitivity_threshold
Typical Sensitivity Values by Technology
| Standard | Sensitivity | Max EIRP |
|---|
| Wi-Fi 802.11b | −76 dBm (11 Mbps) | 20 dBm (US) |
| Wi-Fi 802.11ac | −55 dBm (MCS9) | 23 dBm (US) |
| Bluetooth LE | −90 dBm | 10 dBm (class 1) |
| Zigbee | −90 dBm | 10 dBm |
| LoRa SF12 | −137 dBm | 14 dBm (EU) |
| LTE (UL) | −100 dBm | 23 dBm (cat-4) |
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