针对时空统计特性的箔条云半实物射频仿真

This paper studies the problems in the radio frequency simulation system (RFSS) for chaff clouds, and gives the method to calculate the feeding coefficients of the triad in RFSS. Compared with the point target simulation, chaff clouds simulation focuses on the reproducing of the statistical characteristics of echoes of chaff clouds. The random distribu⁃ tion and the random motion of the dipoles in the chaff clouds will cause the spatial correlations and the temporal correla⁃ tions of the back scattering wave of the chaff clouds. In this paper, it is shown that the characteristics of the spatial correla⁃ tions can be reproduced through the correlations among the feeding coefficients of the transmitting units. And the character⁃ istics of the temporal correlations can be reproduced through the difference mass-center equation, phase shifting in the range and filtering in the time domain. The numerical results have been given to validate the calculating method of the feeding co⁃ efficients of the triad in RFSS for chaff clouds simulation. This work provides the analysis framework of the RFSS for chaff clouds theoretically.