## 4 Conclusions  
To use Fe-based amorphous soft magnetic composite materials for electromagnetic wave-shielding in industrial applications as well as others, increasing the flexibility and elasticity by weaving the fibers into a narrow width braid was evaluated. However, when the weave of the amorphous soft magnetic fiber was too narrow, the length of the slits between the fibers was reduced, but the number of slits was inevitably increased.  
By measuring the electromagnetic wave-shielding performance under various conditions, we confirmed that electromagnetic waves passed through the space between the fibers in fabrics without additional shielding materials. Even if the amorphous soft magnetic fibers and the conductive sheet were not woven together, the shielding efficiency  
Figure 11: Shielding effectiveness of specimen #8 (W = 1000, orthogonal).  
was increased by adding the conductive sheet to the space between the fabric made of the amorphous soft magnetic fibers, and the shielding efficiency was proportional to the area of the conductive sheet and whether it overlapped.  
Conductive sheets, which have been widely used in the past, have low magnetic field shielding efficiency in low-frequency regions. Therefore, it was effective to use a composite material by appropriately combining amorphous soft magnetic fibers and conductive sheets in order to fulfill the electromagnetic wave-shielding efficiency in an extended range from 1 kHz to 10 GHz.  
The shielding effectiveness of 80 dB was achieved in a triple sandwiched structure by alternately stacking an Fe-based amorphous soft magnetic material on top of a flexible conductive sheet at a 90-degree angle, rather than in parallel. After measuring the shielding efficiency of various combinations of amorphous soft magnetic sheets and conductive sheets, the triple structure composed of an amorphous soft magnetic sheet, a conductive sheet and an amorphous soft magnetic sheet, again, stacked alternately at an angle of 90 degrees, was optimal for electromagnetic waves in vertical and horizontal directions.  
In future research, the role of the conductive sheet could be accurately identified by measuring the electromagnetic wave-shielding efficiency when woven with only amorphous soft magnetic fibers at an angle of 90 degrees.  
This study showed that conductive tape compensated for the defects in the long slits of the amorphous soft magnetic material. This novel composite material has potential in cable shielding, in which the amorphous soft magnetic fiber is wound in one direction on the outside of the electric wire to shield it.  
Given the growing interest in space exploration worldwide, electromagnetic wave-shielding will continue to be a challenge. This thin, light, flexible material for electromagnetic wave-shielding has potential for use in artificial satellites in the future. Since the soft magnetic material used in this study was composed of iron and boron, its application could also protect against harmful radiation, such as gamma rays and neutrons.  
Conceptualization, S.L.; methodology, S.L.; software, S.L.; validation, S.L. and J.Y.; formal analysis, S.L. and J.Y.; investigation, S.L. and J.Y.; resources, S.L.; data curation, S.L.; writing--original draft preparation, S.L. and J.Y.; writing--review and editing, S.L.; visualization, S.L. and J.Y.; supervision, S.L.; project administration, S.L. and J.Y.; funding acquisition, S.L. All authors have read and agreed to the published version of the manuscript.  
This research received no external funding.  
Informed Consent Statement: Informed consent was obtained from all subjects involved in the study.  
This study was performed with support from SPACE & BEAN and Seoul National University of Science and Technology in South Korea.  
The authors declare no conflict of interest.