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*HF-Technik**Berechnungshilfen**Electric field intensity and received power in free space / over flat terrain*

< 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.

< 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.