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Optimization-based compensation method for deformed array antennas considering changed mutual coupling and element deformation
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AI
DOI：10.1016/j.aeue.2025.155888.png)
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Abstract
En 中文
External loads would cause mechanical deformations of array surface, including the array element deformation (AED) and the change in the interelement mutual coupling (MC), which will deteriorate the radiation patterns of array antennas. The individual AED and the irregularly changed MC should be strictly considered to actualize accurate compensation of the distorted patterns. This article presents an optimization-based compensation method where the AED and the changed MC are considered rigorously and integrated well into the compensation procedure. Firstly, the possible mechanical deformation of the array surface is predicted based on the computational mechanics. Secondly, an electro-mechanical model is established to analyze the radiation field of the deformed array. Thirdly, a compensation method based on the electro-mechanical model is actualized. The compensation is carried out through optimizing the amplitude and phase of each array element to minimize the peak sidelobe level while maintaining the mainbeam gain in the desired direction. Finally, typical examples of planar and conformal array antennas under different types of mechanical deformations are provided to validate the effectiveness of the approach. Additionally, for a typical deformation form, the regularity among its compensated phases with different loads is found and discussed.
Journal
A
IF:
3.2
Papers:
5.6K
Citations:
8.3K
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