RCS reduction and scattering analysis of screw array

Screw or rivet arrays are widely distributed in aircrafts, which have become the main factors affecting the aircraft invisibility when achieves the suppression of strong scattering sources. The work analyzes the invisible characteristic of smooth circular and triangular screw array, it can be concluded that a screw array with a round smooth surface provides better invisibility than a triangular head screw array, except for certain angles that result in specular reflections. The maximum reduction in invisibility can reach up to 46.4dB. The comparison results demonstrate the effectiveness and feasibility of the proposed angle manipulation method for low RCS screw structures. This may promote the development of low-detection capabilities for weak sources such as screws, rivets, or gaps in aircraft.