RF Link Budget

Calculate received signal power and link margin from transmitter, antenna, and path parameters.

Tx Power (dBm)

Tx Antenna Gain (dBi)

Rx Antenna Gain (dBi)

Cable Loss (dB)

Other Losses (dB)

Rx Sensitivity (dBm)

Path Loss (FSPL)

Distance

Unit

Frequency

Unit

FSPL = 100.05 dB

Received Signal

-77.054 dBm

20 + 2 − 100.05 − 1 − 0 + 2

Link Margin

+12.95 dB

Good link — sufficient margin

Rx = Tx_dBm + Tx_gain − FSPL − Cable_loss − Other_loss + Rx_gain