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When an electromagnetic(EM)wave propagates in an atmospheric pressure plasma(APP)layer,its attenuation depends on the APP parameters such as the layer width,the electrondensity and its profile and collision frequency between electrons and neutrals.This paper proposesthat a combined parameter-the product of the line average electron densityand width d ofthe APP layer(i.e.,the total number of electrons in a unit volume along the wave propagationpath)can play a more explicit and decisive role in the wave attenuation than any of the aboveindividual parameters does.The attenuation of the EM wave via the product of and d withvarious collision frequencies between electrons and neutrals is presented.
When an electromagnetic (EM) wave propagates in an atmospheric pressure plasma (APP) layer, its attenuation depends on the APP parameters such as the layer width, the electrondensity and its profile and collision frequency between electrons and neutrals.This paper proposesthat a combined parameter the product of the line average electron density and width d of the APP layer (ie, the total number of electrons in a unit volume along the wave propagationpath) can play a more explicit and decisive role in the wave attenuation than any of the above in- dividual parameters does The attenuation of the EM wave via the product of and d withvarious collision frequencies between electrons and neutrals is presented.