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本文利用天线散射的基本原理，以波导激励振子抛物面天线为例，计算并分析了天线的结构项散射雷达截面ＲＣＳｓ和模式项散射雷达截面ＲＣＳｅ，给出了此天线雷达截面的预估值。实验结果表明，理论预估值与实测值吻合较好，并且证明天线的模项ＲＣＳｅ大于结构项ＲＣＳｓ，天线总的雷达截面主要受天线模式散射的影响，减小模式项ＲＣＳｅ将有效地降低天线的雷达截面。本文结果为探索以克服天线模式散射为主的天线ＲＣＳ减缩技术提供了理论依据
Taking the principle of antenna scattering as an example, this paper calculates and analyzes the structural RCSs and RCSe of the antenna, and gives the estimated value of the radar cross section. The experimental results show that the theoretical predictions are in good agreement with the measured values and that the RCSe of the antenna is larger than that of the RCSs. The total radar cross section of the antenna is mainly affected by the scattering of the antenna mode. Reducing the mode term RCSe will effectively reduce the antenna Radar cross section. The results of this paper provide a theoretical basis for exploring an antenna RCS reduction technique that overcomes the antenna mode scattering