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Calculation of the Electric Field Intensity & Receive Power in free-space

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< Click to move to the calculation window >

*Antenna gain for a λ/2 dipole antenna or λ/4 ground antenna (monopole antenna) is a fixed value.
*Clicking on the image displays an analysis line.

< Formula >


Electric field intensity formula




Effective area formula




Received power formula: Friis' transmission formula



*Please use the results of the calculation as a reference value.

Calculation of the Electric Field Intensity & Receive Power over flat terrain

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< Click to move to the calculation window >

*Choose a sufficiently large value for distance D in comparison with height Ht and Hr.
*Antenna gain for a λ/2 dipole antenna or λ/4 ground antenna (monopole antenna) is a fixed value.
*Clicking on the image displays an analysis line.

< Formula >


Electric field intensity formula




Effective area formula




Calculation of the Received Power: Friis' transmission formula




*Please use the results of the calculation as a reference value.

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