T.P. Dang1, T.R. Gazizov2

1,2 Tomsk State University of Control Systems and Radioelectronics (Tomsk, Russia)

1 dang.p.2213-2023@e.tusur.ru; 2 talgat.r.gazizov@tusur.ru

Today, telecommunication devices, including scatterers, require compact design and minimum mass. The use of optimal current grid approximation to generate sparse scatterers has proven effective in reducing the mass and surface area of the structure by up to two times. However, applying this method to a wire grid results in free wires, which negatively affects the integrity of the structure. To overcome this problem, improved methods have been proposed, in particular, maximum current optimal current grid approximation, which connects based on high current segments. However, this method also has limitations such as reconnection of connected wires and the failure to connect all free wires. New algorithms aimed at improving the accuracy of maximum current optimal current grid approximation and their application to sparse scatterers are proposed. Two algorithms are developed to ensure accurate connection of free wires in sparse scatterers after optimal current grid approximation. The first algorithm considers all possible connections between segments, improving accuracy. The second algorithm solves the disadvantages of the maximum current optimal current grid approximation, significantly reducing the processing time compared to the first algorithm, while maintaining high accuracy. The analysis of the scattering characteristics shows that after connecting the wires using both algorithms the obtained characteristics coincide with the initial wire grid, which is confirmed on the example of three types of scatterers: flat plate, dihedral and trihedral corner reflector. At the same time, the mass increase of the sparse structure remains non-significant (~3%) compared to the unconnected sparse scatterers. The proposed algorithms can be adapted for different types of wire grid scatterers used in different applications. The obtained sparse structures can be used in mass production due to their low cost and lack of technical difficulties in manufacturing.

Dang T.P., Gazizov T.R. Improving the optimal current grid approximation for sparse scattering structures. Radiotekhnika. 2025. V. 89. № 9. P. 181−192. DOI: https://doi.org/10.18127/j00338486-202509-20 (In Russian)

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