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Electrical Field Strength Conversion Table

Cobham Antenna Systems

In the far field, Zo = 120π (377Ω)

                                 Field Strength Calculation:
The field strength is calculated by adding the Antenna Factor and Cable Factor, and subtracting the Amplifier Gain from the measured reading. The basic equation is as follows:

FS = RA + AF + CF - AG
Where:
FS = Field Strength
RA = Receiver Amplitude
AF = Antenna Factor
CF = Cable Attenuation Factor
AG = Amplifier Gain

1 Gauss = 100 microTesla = 80 Amps/meter

Electrical Field StrengthMagnetic Field Strength
dBμV/m μV/m dBμA/m μA/m picogauss picoTesla
  01.0-51.5  0.00265  33.10.0033
  5  1.78-46.50.0047  58.80.0059
10   3.162  41.50.0084105.00.0105
15   5.623  36.50.0149186.20.0186
20 10.000  31.50.0265331.50.0331
    nanogauss  
2517.8-26.50.04720.5900.0590
30  31.62-21.50.08391.0480.1048
35  56.23-16.50.14921.8650.1865
37  70.79-14.50.18782.3470.2347
40100.00-11.50.26523.3150.3315
 mV/m     
50  0.316-1.5  0.839    10.48  1.048
60  1.000  8.5  2.652    33.15  3.315
70  3.16218.5  8.388104.810.485
8010.00028.526.525331.533.156
   mA/m μgauss nanoTesla
  90    31.638.5  0.0839    1.048  0.1048
100  100.048.5  0.2652    3.315  0.3315
110  316.258.5  0.838810.481.048
1201000.068.52.65233.153.315


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