Weissberger’s modified exponential decay model, or simply, Weissberger’s model, is a radio wave propagation model that estimates the path loss due to the presence of one or more trees in a point-to-point telecommunication link. This model belongs to the category Foliage or Vegetation models.
Frequency: 230 MHz to 95 GHz[1]
Depth of foliage: up to 400 m
Formulated in 1982, this model is a development of the ITU Model for Exponential Decay (MED).
Weissberger’s model is formally expressed as
where,
L = The loss due to foliage. Unit: decibels (dB)
f = The transmission frequency. Unit: gigahertz (GHz)
d = The depth of foliage along the path. Unit: meters (m)