This calculator determines the gain of a parabolic reflector antenna based on its diameter and operating frequency. It helps estimate antenna performance and signal focusing capability.
Formulas
Gain (dB) = 10 * log10[ 6 * (D / λ)² ]
λ = c / f
Formula Explanation
- D is the dish diameter in meters.
- λ is the wavelength, derived from the speed of light (c = 299792458 m/s) and frequency (f).
- The factor 6 represents aperture efficiency for practical parabolic reflectors.
Example
Input: D = 2 m, f = 3 GHz
Result: Gain ≈ 37.8 dB
Who uses it
Useful for RF and satellite engineers designing antennas for communication and radar systems.