Thermo-Mechanical Coupling Modeling of Active Phased Array Antennas

  • Xinyuan Wei
  • Enming MiaoEmail author
  • Yangyang Chen
  • Wei Wang
Regular Paper


The large thermal deformation of the panel in active phased array antennas (APAAs) caused by the thermal power consumption of the internal devices and the change in the ambient temperature in actual operating conditions will result in a considerable decline in the electromagnetic (EM) performance of radar. Experimental research indicates that the thermal deformation of the panel is affected not only by temperature but also by the constraints caused by the installation. Thus, this paper proposes a thermo-mechanical coupling modeling method for an APAA considering the panel temperature and constraints. The coupling model can accurately predict the panel thermal deformation, thereby providing a basis for the compensation of the EM performance of radar. The thermal deformation of the panel is decomposed into a thermal expansion and an offset. Models of the thermal expansion with respect to temperature and the offset with respect to the constraint force are established. The final thermo-mechanical coupling model is obtained by coupling the two models. Experiments verify that the prediction accuracy of the coupling model is 86.3%, which is 21.0% higher than that of a finite element software simulation. The content of this research has practical engineering importance for improving the overall performance of APAAs.


Active phased array antenna Panel thermal deformation Constraint force Thermo-mechanical coupling modeling 



This work is supported by the Key Project of the National Natural Science Fund of China (Nos. 51490660/51490661).


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Copyright information

© Korean Society for Precision Engineering 2019

Authors and Affiliations

  1. 1.School of Mechanical EngineeringChongqing University of TechnologyChongqingChina
  2. 2.School of Instrument Science and Opto-electronics EngineeringHefei University of TechnologyHefeiChina
  3. 3.Key Laboratory of Electronic Equipment Structure Design, Ministry of EducationXidian UniversityXi’anChina

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