Near-Field Power Density

Near-Field Power Density

RN-01
ASPCSPAdvanced

Formula
W = P/A = 16P/D²
When to Use

Estimate power density in the near-field zone of an antenna. Used for RF exposure assessment near transmitters.

Symbol Legend
SymbolMeaningUnitNote
WNear-field power densityW/m² or mW/cm²
PRadiated power from antennamW
AEffective antenna areacm²
DDiameter of antennacm

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