KR-20260065312-A - Design method of a jig with electromagnetic wave absorption performance using a 3D printer to minimize interference in radar cross-section measurement

Abstract

The present invention relates to a method for designing a jig having electromagnetic wave absorption performance using a 3D printer to minimize interference in radar cross-sectional area measurement. The present invention includes the steps of evaluating the electromagnetic wave absorption performance of a 3D printer medium, designing a jig that fits a target shape, analyzing the radar cross-sectional area of the designed jig, and printing the final designed jig using a 3D printer. Through this, unnecessary resource waste can be minimized and the accuracy of radar cross-sectional area measurement can be improved.

Inventors

• 윤대영

Assignees

• 윤대영

Dates

Publication Date

20260508

Application Date

20241101

Claims (5)

1. In a method for designing a jig having electromagnetic wave absorption performance using a 3D printer to minimize interference in radar cross-sectional area measurement, A step of evaluating the medium of the 3D printer to be printed; A step of fixing the target and determining the shape of the jig into a form printable by a 3D printer; A step of interpreting the radar cross-sectional area of the jig whose shape has been determined above, and determining the wall thickness and internal structure of the jig based on the interpreted information; A method for designing a jig having electromagnetic wave absorption performance using a 3D printer to minimize radar cross-sectional area measurement interference, comprising the step of printing a jig with the above-mentioned shape, wall thickness, and internal structure using a 3D printer.
2. In Article 1, In the step of evaluating the medium of the 3D printer to be printed above, The 3D printer medium to be printed above may be PLA, ABS, carbon fiber filament, or resin, and The above evaluation step involves evaluating the permittivity, loss tangent, etc., of the 3D printer medium to be printed using free-space measurement methods, resonance techniques, etc.
3. In Article 1, In the step of fixing the above target and determining the shape of the jig in a form printable by a 3D printer, To fix the above target, the shape of the jig is determined using a 3D CAD program, and A step of determining the shape of a jig that can be printed by a 3D printer using a slicer program to evaluate the printability of the above 3D printer.
4. In Article 1, In the step of interpreting the radar cross-sectional area of the jig whose shape has been determined above, and determining the wall thickness and internal structure of the jig based on the interpreted information, To interpret the radar cross-section of the jig with the above-mentioned shape, an electromagnetic scattering analysis technique or a simulator is used, and A step of determining the wall thickness and internal structure of the jig based on the above interpreted information.
5. In Article 1, In the step of printing the jig, in which the shape, wall thickness, and internal structure are determined, using a 3D printer, A step of printing using a 3D printer that uses the FFF (fused filament fabrication) technique or the SLS (selective laser sintering) technique to print with the above 3D printer.

Description

Design method of a jig with electromagnetic wave absorption performance using a 3D printer to minimize interference in radar cross-section measurement The present invention relates to a method for designing a jig to minimize interference in radar cross-sectional area measurement, and more specifically, to a method for designing a jig suitable for the shape of the jig and having electromagnetic wave absorption performance to minimize measurement interference using a 3D printer. As the scope of radar applications expands, it is necessary to specialize the radar cross-sections of relatively small structures, such as guided missiles and bullets, as well as large structures like fighter jets and ships, through measurement. However, jigs used for conventional radar cross-sectional area measurement have been designed in a form suitable for large structures. While the influence of the jig is minimized when measuring large structures, this effect cannot be ignored when measuring small structures. To solve this problem, the influence of the jig can be minimized by installing materials such as styrofoam and then installing the target on top of it. However, styrofoam is not suitable for supporting heavy weight, and it has the disadvantage of consuming a lot of unnecessary resources because it is processed using cutting. FIG. 1 is a flowchart illustrating a method for designing a jig having electromagnetic wave absorption performance using a 3D printer to minimize radar cross-sectional area measurement interference according to the present invention. FIG. 2 is an example of a case in which a jig having electromagnetic wave absorption performance using a 3D printer to minimize radar cross-sectional area measurement interference according to an embodiment of the present invention is manufactured. Hereinafter, an embodiment of the present invention will be described with reference to the attached drawings. As shown in FIG. 1, the method for designing a jig having electromagnetic wave absorption performance using a 3D printer to minimize interference in radar cross-sectional area measurement according to the present invention includes the steps of: evaluating the medium of a 3D printer to be printed; fixing a target and determining the shape of the jig in a form that can be printed by a 3D printer; analyzing the radar cross-sectional area of the jig with the determined shape and determining the thickness of the wall and internal structure of the jig based on the analyzed information; and printing the jig with the determined wall thickness and internal structure using a 3D printer. Furthermore, in the stage of evaluating the electromagnetic wave absorption performance of a 3D printer, the printed filament may utilize media such as PLA, ABS, or carbon fiber, and free-space measurement is used to determine the permittivity and loss tangent of these media. Free-space measurement involves placing a planar specimen between two antennas and calculating reflection and transmission coefficients based on the signals received by each antenna. Using the calculated reflection and transmission coefficients, the permittivity and loss tangent of the planar specimen can be calculated inversely. In addition, a jig shape is determined using a 3D CAD program to fix the target, and a 3D design can be realized using a slicer program in a form that can be printed with a 3D printer. The 3D shape is produced with priority given to a form that is easy to install, and is manufactured in a form that is as easy to 3D print as possible. Specifically, the shape is determined with the goal of printing a form that does not generate supports. In addition, electromagnetic scattering analysis techniques or simulators can be used to analyze the radar cross-section of a jig with a determined shape, and the thickness of the jig's walls and internal structure can be determined based on the analyzed information. As shown in Fig. 2, simulations are performed continuously to determine the thickness of the jig's walls (t w ) and internal structure that minimize the radar cross-section. In addition, a 3D printer using FFF (fused filament fabrication) or SLS (selective laser sintering) techniques can be used to print a jig with determined wall thickness and internal structure.