Multi-disciplinary optimization of hybrid composite radomes for enhanced performance

Abstract

The focus of this research is to develop a specialized multidisciplinary design optimization framework for composite sandwich-structured radomes. Radomes play a crucial role in safeguarding antenna systems from challenging environmental conditions. However, they can adversely impact the electromagnetic performance of the antenna. Unlike traditional approaches that separately address electromagnetic performance and mechanical responses, our framework considers both aspects concurrently, resulting in a more efficient process. The main objectives of the optimization are to enhance electromagnetic performance while also accounting for deformations, material integrity, and structural stability. To evaluate the electromagnetic performance, a 3-dimensional numerical simulation is employed to analyze parameters such as electromagnetic transmission loss, bore sight error, and side lobe characteristics. The model's accuracy is verified through experimental testing in an anechoic chamber, utilizing a hybrid sandwich structure. The results indicate minimal attenuation, with an average loss of only 1.5 % in the transmission of antenna signals, using the proposed radome thickness. Furthermore, the configuration of the material provides structural stability, ensuring a factor of safety of 2.5 while satisfying operational constraints. Hence, the proposed multidisciplinary optimization model represents an efficient and feasible approach to radome design. This advancement in the field equips engineers and researchers with a valuable tool to develop dependable and effective radome systems.