This calculator allows you to figure out the maximum radius of the Fresnel zone between a radio transmitter and receiver. The Fresnel zone is the series of radio waves connecting the 2 devices allowing them to communicate. Any obstruction of these radio frequencies will cause interference. The shape of this zone is similar to a stretched oval or partially inflated balloon stretch on each side.
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Calculator Instructions
- Enter the distance between the 2 antennas.
- Enter the frequency used by the radios.
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For more details check out my video where I test the bandwidth and range of 2 Point to Point LigoWave DBL 5-20ac Radios. The use 5GHz with a gain of 20.
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Check out Ligowave’s website for more product information.



