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Electrical / RF
Fresnel Zone Calculator
Calculate first-zone radius and practical 60% clearance at a point on an RF path.
Link geometry
First Fresnel zone
Zone radius at obstacle11.3675 m
60% clearance: 6.8205 m
- First-zone radius
- 11.3675 m
- 60% clearance radius
- 6.8205 m
- Wavelength
- 0.051688 m
- Endpoint-distance mismatch
- 0 m
The 60% figure is a common planning clearance target, not a complete link-budget or terrain analysis. Allow for earth curvature on long paths.