Electrical Field Strength Conversion Table
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 Strength | Magnetic Field Strength | ||||
| dBμV/m | μV/m | dBμA/m | μA/m | picogauss | picoTesla |
| 0 | 1.0 | -51.5 | 0.00265 | 33.1 | 0.0033 |
| 5 | 1.78 | -46.5 | 0.0047 | 58.8 | 0.0059 |
| 10 | 3.162 | 41.5 | 0.0084 | 105.0 | 0.0105 |
| 15 | 5.623 | 36.5 | 0.0149 | 186.2 | 0.0186 |
| 20 | 10.000 | 31.5 | 0.0265 | 331.5 | 0.0331 |
| nanogauss | |||||
| 25 | 17.8 | -26.5 | 0.0472 | 0.590 | 0.0590 |
| 30 | 31.62 | -21.5 | 0.0839 | 1.048 | 0.1048 |
| 35 | 56.23 | -16.5 | 0.1492 | 1.865 | 0.1865 |
| 37 | 70.79 | -14.5 | 0.1878 | 2.347 | 0.2347 |
| 40 | 100.00 | -11.5 | 0.2652 | 3.315 | 0.3315 |
| 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 | 3.162 | 18.5 | 8.388 | 104.8 | 10.485 |
| 80 | 10.000 | 28.5 | 26.525 | 331.5 | 33.156 |
| mA/m | μgauss | nanoTesla | |||
| 90 | 31.6 | 38.5 | 0.0839 | 1.048 | 0.1048 |
| 100 | 100.0 | 48.5 | 0.2652 | 3.315 | 0.3315 |
| 110 | 316.2 | 58.5 | 0.8388 | 10.48 | 1.048 |
| 120 | 1000.0 | 68.5 | 2.652 | 33.15 | 3.315 |
Webmaster: Kirt Blattenberger, BSEE, UVM 1989