EMC Radiated Emissions Calculator

Estimate radiated EMI from PCB traces. Compare with FCC/CISPR limits.

Trace Length (mm)

Trace Height above GND (mm)

Signal Voltage (V)

Rise Time t_r (ns)

Frequency (MHz)

Distance to Antenna (m)

E ∝ I×A×f²/d

f_max = 1/(π×t_r) – maximum emission frequency