Note:

• 1. Free space loss = 32.44 + 20Log10(Frequency) + 20Log10(Distance in km)
• 2. Margin= Tx System Total- FSL - RX System Total
• 3. Miles to Kilometers = 1.609
• 4. meters to feet = 3.28
• 5. 1st Fresnel Zone radius (Km) = 17.3 x Sqr root ((Obstacle Distance x (Total Link - Obstacle Distance)) / (Frequency in GHz x Total Link))
• 6. In this calculator we are using the right middle part of 1st Fresnel Zone radius.
• 7. Antenna height must be more than 60% of the 1st fresnel zone
• 8. Use Google chrome or you mobile browser, do not use Internet Explorer (won't output result).