Antenna Gain & Effective Aperture

Calculate antenna gain (dBi), effective aperture, and beamwidth for various antenna types.

Antenna Type

Diameter (m)

Frequency (GHz)

Efficiency η (0–1, default 0.6)

Gain

35.335 dBi

3415.7 (linear)

Effective Aperture (Ae)

0.1696 m²

λ²G / 4π

Beamwidth (est.)

2.706°

65λ/D

Dish gain: G = η × (πD/λ)²

Effective aperture: Ae = λ²G / 4π

Beamwidth: θ ≈ 65λ/D degrees