Amateur Radio RF Safety Calculator

Calculation Results
Average Power at the Antenna 
watts 
Antenna Gain in dBi 
dBi 
Distance to the Area of Interest 
feet metres 
Frequency of Operation 
MHz 
Are Ground Reflections Calculated? 

Estimated RF Power Density 
mW/cm^{2} 


Controlled
Environment 
Uncontrolled
Environment 
Maximum Permissible Exposure (MPE)

mW/cm^{2}

mW/cm^{2}

Distance to Compliance From Centre of Antenna

feet
metres

feet
metres

Does the Area of Interest Appear to be in Compliance?




Interpretation of Results

The power value entered into these calculations should be the average power
seen at the antenna and not Peak Envelope Power (PEP). You should also
consider feedline loss in calculating your average power at the
antenna.

If you wish to estimate the power
density at a point below the main lobe of a directional antenna, and if
the antenna's vertical pattern is known, recalculate using the
antenna's gain in the relevant direction.

Please also consult FCC OET Bulletin 65 Supplement B,
the Amateur Radio supplement to FCC OET Bulletin 65. It contains a
thorough discussion of the RF Safety regulations as they apply to
amateur stations and contains numerous charts, tables, worksheets and
other data to help determine station compliance.
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