RF Power Density

Computes the far-field RF power density using: S = (P × G) / (4π × r²), where P is input power in mW, G is the linear antenna gain converted from dB, and r is the distance to the antenna centre in cm. Result is in mW/cm².

Inputs

Input Power(mW)

Transmit power fed to the antenna in milliwatts

Power Gain(dB)

Antenna power gain in decibels — converted to linear via G = 10^(dB/10)

Distance to Centre of Antenna(cm)

Distance from the antenna centre to the point of measurement in centimetres

Results

⚠Distance must be greater than zero

Power Density—mW/cm²RF power density at the given distance in milliwatts per square centimetre