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| The '''ITU Vegetation Model''' is a [[radio propagation model]] that estimates the [[path loss]] encountered due to the presence of one or more trees inside a point to point [[telecommunication]] link. The predictions found from this model is congruent to those found from [[Weissberger's Model|Weissberger’s Modified Exponential Decay Model]] in low frequencies.
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| ==History==
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| The CCIR, predecessor of ITU, adopted this model in the late 1986.
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| ==Applicable to/under conditions==
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| * This model is applicable on the situations where the [[telecommunication]] link has some obstructions made by trees along its way
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| * This model is suitable for point-to-point [[microwave]] links that has a vegetation in their path.
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| * Typical application of this model is to predict the [[path loss]] for microwave links.
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| ==Coverage==
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| Frequency: Not specified
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| Depth of Foliage: Not specified
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| ==Mathematical formulation==
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| The model is formulated as:
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| <math> L = 0.2 \, f^{0.3} \, d^{0.6}</math> | |
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| Where
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| :''L'' = The path loss. Unit: [[decibel]] (dB)
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| :''f'' = The frequency of transmission. Unit: [[megahertz]] (MHz) | |
| :''d'' = The depth of foliage along the link: Unit: meter (m)
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| ==Points to note==
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| This equation is scaled for frequency specified in megahertz (MHz).
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| The depth of foliage must be in the units of meters.
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| ==Limitations==
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| The results of this model gets impractical at [[Frequency|high frequencies]].
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| ==Further reading==
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| ''Introduction to RF Propagation,'' John S. Seybold, 2005, John Wiley and Sons.
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| ==See also==
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| *[[Radio propagation model]]
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| [[Category:Radio frequency propagation]]
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