A Mechanical Electromagnetic Decoupling Computational Method for Radiation Performance of Distorted Reflector Antennas with the Best Fit Paraboloid

ZHANG Shu-xin; LIANG Chang-yi

doi:10.12263/DZXB.20250286

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A Mechanical Electromagnetic Decoupling Computational Method for Radiation Performance of Distorted Reflector Antennas with the Best Fit Paraboloid

PAPERS | 更新时间：2025-12-27

- A Mechanical Electromagnetic Decoupling Computational Method for Radiation Performance of Distorted Reflector Antennas with the Best Fit Paraboloid
- ACTA ELECTRONICA SINICA Vol. 53, Issue 9, Pages: 3134-3146(2025)
- 作者机构：
  
  西安电子科技大学高性能电子装备机电集成制造全国重点实验室，陕西西安 710071
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(52322507)
- DOI：10.12263/DZXB.20250286
  CLC： TN82;
- Received：14 April 2025，
  
  Accepted：30 July 2025，
  
  Published：25 September 2025
- 稿件说明：
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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(09): 3134-3146.

ZHANG Shu-xin, LIANG Chang-yi. A Mechanical Electromagnetic Decoupling Computational Method for Radiation Performance of Distorted Reflector Antennas with the Best Fit Paraboloid[J]. Acta Electronica Sinica, 2025, 53(09): 3134-3146.
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(09): 3134-3146. DOI：10.12263/DZXB.20250286

ZHANG Shu-xin, LIANG Chang-yi. A Mechanical Electromagnetic Decoupling Computational Method for Radiation Performance of Distorted Reflector Antennas with the Best Fit Paraboloid[J]. Acta Electronica Sinica, 2025, 53(09): 3134-3146. DOI：10.12263/DZXB.20250286

摘要

多源载荷作用下反射面天线机电耦合分析、设计与调控是大口径反射面天线设计的难点.现有机电耦合计算方法采用积分运算模型，无法将结构变形进行解耦，导致积分运算复杂，计算耗时.针对多源载荷作用下变形反射面天线机电耦合计算复杂，难以开展电性能快速评估、调控等问题，提出了一种最佳吻合下变形反射面天线电性能机电解耦计算方法.以最佳吻合操作后的天线状态为基准，采用最佳吻合获得的法向偏差作为电性能计算的结构输入；利用相位项二阶展开近似方法，将结构变形分离出原有积分运算之外，使得原有积分运算转换为矩阵相乘模型；通过结构变形的分离与机电解耦，建立了最佳吻合下变形反射面天线电性能机电解耦计算模型，实现了最佳吻合下电性能快速解耦运算.以8 m反射面天线为典型案例，以假设结构变形、不同仰角下的重力与风载荷变形信息为结构输入，开展了多源载荷作用下天线电性能机电解耦计算方法的验证.仿真案例表明，在多源载荷作用下反射面天线电性能计算结果中，所提机电解耦计算方法可以获得与原有积分运算模型相吻合的天线方向图，且增益损失偏差在0.1 dB以内，具有较高的计算精度，满足天线设计要求.与原有积分模型相比，所提模型在保证计算精度的情况下，多源载荷作用下变形反射面天线电性能计算效率可提升95%，从而为电性能快速评估、调控等奠定基础.

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 estimation and adjustment for electromagnetic performance. To solve this problem

a mechanical-electromagnetic decoupling computational method is proposed to obtain the radiation performance for distorted reflector antennas with the best fit paraboloid. 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 decoupling

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 antenna 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 original 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 foundation for the fast estimation and adjustment of electromagnetic performance.

关键词

Keywords

references

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