basic

Antenna Gain from Aperture Calculator

G = 4 π A_eff / λ² (with aperture efficiency).

Compute the gain of an aperture antenna from its physical area, aperture efficiency, and the operating wavelength: G = 4π · η · A / λ². Reports gain as a ratio and in decibels (dBi).

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

m²
GHz

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

G = 4π · η · A / λ²; G_dBi = 10 · log10(G).

In depth

Compute the gain of an aperture antenna from its physical area, aperture efficiency, and the operating wavelength: G = 4π · η · A / λ². Reports gain as a ratio and in decibels (dBi).