Signal Strength Calculator
RSSI v1.0
20 dBm
-10
0
10
20
30
40
50
100 m
1m
10m
100m
1km
5km
10km
2.4 GHz
0.1
0.9
2.4
3.5
5.0
6.0
2 dBi
2 dBi
-10
0
10
20
Received Signal
-48.5 dBm
Path Loss
-80.4 dB
Signal Quality
Excellent
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Signal Strength Meter
Poor
Fair
Good
Excellent
-48.5 dBm
Link Budget
-48.5 dB
Fade Margin
11.5 dB
Range Category
Line of Sight
Interference Risk
Low
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Frequency Bands
Sub-1 GHz
Long Range
2.4 GHz
Wi-Fi / Bluetooth
3.5 GHz
5G / CBRS
5.0 GHz
Wi-Fi 5/6
6.0 GHz
Wi-Fi 6E
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Formula
Path Loss (dB) = 20 log₁₀(d) + 20 log₁₀(f) + 32.44
d = distance in km, f = frequency in MHz
Rx Signal = Tx Power + TX Gain + RX Gain - Path Loss
Fade Margin = Rx Signal - Sensitivity
Free Space Path Loss (FSPL) model
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Signal Strength Guide
- 1 Set transmitter power in dBm
- 2 Enter distance between devices
- 3 Select operating frequency
- 4 Add antenna gains for both ends
- 5 Calculate received signal strength