Abstract: | With the increase of radar frequency band, the influence of rain, cloud, fog and other meteorological factors on radar detection gradually cannot be ignored. In order to analyze the influence of meteorological particle clusters on radar detection, this paper summarizes the spectral distribution and attenuation characteristics of electromagnetic waves under different types of meteorological particle clusters. Then, the model information of meteorological particle clusters is given according to the particle spectrum equation. Finally, based on the vector radiative transfer method, an improved method for fast simulation of particle clusters time-domain echoes is proposed, including the optimization of partition acceleration and propagation path judgment. The optimization effect in large-volume clusters modeling can reach about 20 times of the ordinary method. The results show that the rain clusters cause large clutter to the radar detection, and its clutter amplitude is about 10-4 times of the transmit power. The time-domain results of cloud clusters have strong randomness, and the time-domain results of fog clusters are uniform and of low amplitude. This paper presents the simulation results and analysis of the time-domain echoes of different types of meteorological particle clusters, which have certain value of reference for the precise detection research of radar. |