Parabolic Dish Antenna Calculator
Gain, beamwidth, effective area and far-field distance of a parabolic reflector antenna.
How to use the Parabolic Dish Antenna Calculator
- Enter or select: Dish diameter D, Frequency f, Aperture efficiency.
- The results (Wavelength, Gain, Gain (linear), Half-power beamwidth ≈ 70λ/D, Effective area, Far-field distance 2D²/λ) are calculated instantly as you type.
- Use “Copy link” to share the calculation with the same input values.
Formula
- G = η(πD/λ)²
- HPBW ≈ 70λ/D
- R_ff = 2D²/λ