电子学报2025，Vol.53Issue(9)：3134-3146,13.DOI:10.12263/DZXB.20250286
最佳吻合下变形反射面天线电性能机电解耦计算方法
A Mechanical Electromagnetic Decoupling Computational Method for Radiation Performance of Distorted Reflector Antennas with the Best Fit Paraboloid
摘要
Abstract
The mechanical-electromagnetic coupling analysis,design,and control of reflector antennas under multi-source loads are key challenges in the design of large-aperture reflector antennas.The existing mechanical-electromagnetic coupling calculation method adopts integral operation models,which fails to decouple the structural deformations and leads to both complex integral operation and high computational time consumption.Distorted reflector antennas suffer from multi-source loads,which makes the mechanical-electromagnetic coupling analysis complex and can not support the fast estima-tion and adjustment for electromagnetic performance.To solve this problem,a mechanical-electromagnetic decoupling com-putational method is proposed to obtain the radiation performance for distorted reflector antennas with the best fit parabo-loid.Taking the antenna state under the operation of best fit paraboloid as the basis,the normal distortion is taken as the structural input for the electromagnetic computation.Adopting the second order series expansion of the phase component,the structural distortion is separated from the electromagnetic computation,which makes the original integral computation convert to a matrix multiplication model.With the separation of structural distortion and the mechanical-electromagnetic de-coupling,the mechanical-electromagnetic decoupling computational model is established for distorted reflector antennas with the best fit paraboloid,and the fast decoupling electromagnetic computation is achieved.Taking an 8 m reflector anten-na as a typical example,and introducing hypothetical structural deformations as well as deformations caused by gravity and wind loads at different elevation angles as structural inputs,the verification of the mechanical-electromagnetic decoupling computational method for antenna electromagnetic performance under multi-source loads is carried out.Simulation shows that in the calculation results of antenna electromagnetic performance under multi-source loads,the proposed mechanical-electromagnetic decoupling computational method can obtain a well matched antenna radiation pattern with that of the origi-nal integral operation model.Moreover,the deviation of gain loss between the two models is within 0.1 dB,indicating the high calculation accuracy of the proposed method that meets the antenna design requirements.Compared with the original integral model,the proposed method can guarantee computational accuracy,and improve the computation efficiency about 95%of the electromagnetic performance for distorted reflector antennas under multi-source loads,which can pave the foun-dation for the fast estimation and adjustment of electromagnetic performance.关键词
最佳吻合/反射面天线/电性能/法向偏差/机电解耦Key words
best fit/reflector antennas/electromagnetic performance/normal distortion/mechanical-electromagnetic decoupling分类
信息技术与安全科学引用本文复制引用
张树新,梁昌艺..最佳吻合下变形反射面天线电性能机电解耦计算方法[J].电子学报,2025,53(9):3134-3146,13.基金项目
国家自然科学基金(No.52322507) National Natural Science Foundation of China(No.52322507) （No.52322507）
