Based on the Rayleigh approximation, the electromagnetic wave illumining on a partially charged sand particle, the forward scattering amplitude function, and the expression of differential attenuation and differential phase shift are derived. We calculated the cross depolarization discrimination of linear polarized wave propagated on the charged dust storm. The results indicate that the partially charged spherical particle also can make the incident wave depolarized, and the depolarization effect firstly increases and then decreases with the charged angle increasing. When the charged angle is equal to 90, the cross depolarization effect reaches up to its maximum. With the increasing of the charge-mass ratio and the frequency of the electromagnetic wave, the cross depolarization effect increases, but which decreases with the visibility increasing. All these results show that it is important to take into account the depolarization effect of charged sands on the radio receiver ' s design.

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