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Radiation Power Calculator | EM Power Density & EIRP Calculators


Radiation Power Calculator

Radiation Power & Far-Field Power Density Calculator

Power Density: —

Radiation Power (EIRP) Calculator

Tips: Transmit power PTX = actual power fed into the antenna (e.g., 10 W).

Antenna gain / beamforming concentrates energy in certain directions.

EIRP = “equivalent power if an isotropic antenna radiated in that direction.”

So, if you have a 10 W transmitter and a high-gain directional antenna or beamforming array pointing at the receiver:

EIRP = PTX × Glinear, where Glinear is the linear gain of the antenna in the beam direction.

If GdBi = 6 dBi → Glinear = 10^(6/10) ≈ 3.98

Then EIRP ≈ 10 W × 3.98 ≈ 39.8 W.

This is exactly your example: 10 W transmitted, but effectively ~40–45 W in the beam direction.

Far-Field Power Density Calculator

Transmitter Parameters

Receiver Distance

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