Based on mirror image theory a ray-tracing method is employed to predict the propagation characteristics in 62.4 GHz microcell channels.It takes reflection and diffraction into account.The prediction results have shown that the predicated power of received signals is less than the practical one under the assumption of smooth building surfaces and the negligence of oxygen absorption whereas the prediction precision can be inproved taking into account of the coarseness of the building surfaces and oxygen abso...