Frequency dependence of fire-induced signal level variability

In this paper we present the results of an experiment carried out to assess the signal level variability induced by propagation through fire. It extends preliminary results carried just for the 200 MHz - 400 MHz frequency band to de 200 MHz - 4 GHz frequency band. Results show that signal level variability increases with frequency, reaching values that are significantly higher than the ones we report previously. Such variation should be taken into account as an additional fade margin when planning radio networks that should be resilient to fire effects.