Topology optimization of reflector antennas based on integrated thermal-structural-electromagnetic analysis

In the area of structural design of reflector antennas, the existing researches mainly focus on size/shape optimization or just optimizing for structural performances (e.g., the reflector surface accuracy). Reflector antennas are one kind of equipment which is finally judged by its electromagnetic performances, and topology optimization has been proven a powerful method for structural design. In this paper, an integrated thermal-structural-electromagnetic (TSE) analysis procedure based on topology variables for reflector antennas is established for the first time. Then, topology optimization of the backup structure (BUS) of reflector antennas is developed and solved by genetic algorithms (GA) with bit-matrix representation of chromosome. The proposed optimization design method takes both the electromagnetic performance (antenna gain) and structure performance (total weight) into consideration. Numerical examples of BUS topology optimization of maximum gain with weight constraint are carried out. For comparison, a traditional minimum compliance design is also performed. The results illustrate the validity and effectiveness of the proposed method in the topology optimization of reflector antennas.

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