Antenna Beamwidth Calculator
Calculate antenna 3dB beamwidth from frequency and aperture diameter. Uses the standard approximation θ = k × λ / D with configurable k-factor for different antenna types.
How to Use Antenna Beamwidth Calculator
Enter the operating frequency and aperture diameter with their units. Optionally adjust the k-factor (typically 65-75 depending on antenna type). Click Calculate to get the 3dB beamwidth in degrees and radians.
Step-by-Step Instructions
- Enter the operating frequency (MHz or GHz)
- Enter the aperture diameter (m, cm, or ft)
- Adjust k-factor if needed (default 70)
- Click Calculate Beamwidth for results
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