Design and Fabrication of Frequency Selective Surface Radome Based on Inextensible Quadric Surface

Frequency Selective Surface (FSS), as a spatial filter, is widely used in many fields, such as radar and microwave communication, remote sensing and stealth realization, and so on. However, infinite plane FSS models are always used as a theoretical model in practical application and design process. In fact, most FSS models are based on inextensible quadric surfaces, such as radar radome. In this case, the electromagnetic (EM) design of infinite plane FSS model is disabled. In this paper, a novel method of designing inextensible quadric FSS radome based on path tracing algorithm is developed, and a novel method of fabricating the corresponding FSS radome based on three-dimensional (3D) printing technique is also introduced. To testify the feasibility of above the methods, according to the shape of a radome of a missile, an inextensible quadric FSS radome is designed and fabricated. First, the EM simulation results from the infinite FSS models, which involves the case adapted to large angle of incidence, are used to filtrated the size and form of the original inextensible quadric structure. Second, the linked simulation between the radar or antenna and the radome is further developed and analyzed. Finally, the 3D printing technique is employed to realize the production fabrication of the frequency selective surface radome based on inextensible quadric surface.