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In modern warfare, electromagnetic stealth and high-tech electromagnetic warfare occupy a very important position. The radar cross section (RCS) involved in this is of great significance in electromagnetic stealth. In this paper, the radar cross section of UAV group is simulated by FEKO software, and analyze its RCS. The analysis of UAV group can provide important conclusions for stealth and penetration in modern warfare. Then by changing the spacing between the UAVs, observe the influence on the scattering pattern, and finally draw the conclusion.

A shooting and bouncing ray (SBR) method Based on Gaussian integrals is presented in this paper. For the traditional high frequency algorithm based on triangle facet modeling, gaussian integral method is one of the integration methods with higher accuracy, but it is no longer applicable to the SBR algorithm with quadrangle integration facet. In this paper, gaussian integral method is proposed to calculate SBR integral, the validation of the proposed method was verified by comparing the electrically large objects simulation results with those of the XX-MLFMM.