Scattering of electromagnetic waves by charged partcles in atmosphere

Study of the scattering of electromagnetic waves by charged partcles in atmosphere is significant to the detection of the clouds and lightning warning and analsis of the effect of the charged sands on radio communications. Scattering of electromagnetic waves by charged partcles small compared with the wavelength is analszed by both of macroscopic and microcosmic theory, corresponding two principle of the scattering of electromagnetic waves. Macroscopic theory is related to the scattering of electromagnetic waves produced by the macroscopic electric current across the particles when the electron is drived by the external electric field. Microcosmic theory is related to the scattering of electromagnetic waves produced by the forced vibration of the electron near its balance position. The effects of the scattering of electromagnetic waves by partcles before and after charging is studied by comparing the scattering sections. Analysis shows that the charges carried by the particles have no effect on the scattering of electromagnetic waves from macroscopic perspective, and have great effect from the microcosmic perspective near some frequency.