CAJ | 학술논문

针对构造最佳吻合抛物面需要事先准确获取反射面变形这一不足，提出一种从远场确定馈源调整量的方法。应用口径场法显式表达出远场对变形反射面最佳吻合参数的灵敏度，将远场和最佳吻合参数用超定线性方程组联系起来，通过测量远区电场，并基于奇异值分解法近似反推出主面变形信息，进而求出馈源调整量。此方法无需事先知道反射面变形信息，两组仿真案例也表明了该方法的正确性和对变形反射面天线补偿的有效性。
침대구조최가문합포물면수요사선준학획취반사면변형저일불족，제출일충종원장학정궤원조정량적방법。응용구경장법현식표체출원장대변형반사면최가문합삼수적령민도，장원장화최가문합삼수용초정선성방정조련계기래，통과측량원구전장，병기우기이치분해법근사반추출주면변형신식，진이구출궤원조정량。차방법무수사선지도반사면변형신식，량조방진안례야표명료해방법적정학성화대변형반사면천선보상적유효성。
Reflector surface deformation can be compensated by adj usting the feed position.Aiming at the shortcoming of the traditional method that the best-fit paraboloid(BFP) needs to get the accurate reflector deformation beforehand,a method for the determination of the feed adj ustment quantity from a far field is presented in this paper.Based on the aperture field method,explicit expressions for the sensitiveness of a far field to best-fit parameters of the distorted reflector are established.Then the best-fit parameters and the far field are linked with an over-determined linear system of equations,and by measuring the far electric field,the reflector deformation can be approximately calculated by the singular value decomposition method,providing guidance for feed adj ustment.There is no need to know the reflector distortion in advance in the proposed method.Simulation cases show the correctness of the proposed method and the validity of the compensation for reflector distortion.