Affiliations: Key Laboratory of Electronic Equipment Structure Design of Ministry of Education, Xidian University, Xi'an, Shaanxi, China
Correspondence:
[*]
Corresponding author: Jinzhu Zhou, Key Laboratory of Electronic Equipment Structure Design of Ministry of Education, P. O. Box 191, Xidian University, Xi'an, Shaanxi, China. Tel.: +86 13891824426; Fax: +86 2988203040; E-mail:[email protected]
Abstract: This paper proposes a coupling approach to investigate
the effects of dynamic loads on the performance of structurally integrated
antenna. In this method, the deformed displacement of radiating elements is
determined by using the modal superposition principle of dynamic mechanic
equation. Subsequently, the deformed displacement is coupled to the radiated
field equation of the antenna array considering the effect of mutual
coupling. Finally, an electromechanical coupling model is built by combining
the equations from two different disciplines. An iterative solution method
is presented to solve the coupling model. Some experimental devices are
designed by utilizing a 2.5 GHz structurally integrated antenna, and the
results confirm the effectiveness of the coupling model. The validated model
is applied to investigate the influences of dynamic loads on the mechanical
and electrical performance. The results show that the deformed displacement
of radiating elements depends on the structural constraint forms and dynamic
load values. Moreover, the greater the deformed displacement of the antenna
array surface, the more serious the degradation of the electrical
performance. The coupling model is particularly suited to the
multidisciplinary analysis and design of structurally integrated antenna.
