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Semi-cylindrical Radar Absorbing Structures using Fiber-reinforced Composites and Conducting Polymers in the X-band

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This paper presents a low observable structure with curved surfaces made by fiber-reinforced composites, conducting polymers and shows the possibility of developing stealth platforms for military applications. We propose radar absorbing structures (RAS) based on a circuit analog absorber in order to reduce the radar cross-section (RCS) of an object with curved surfaces. First, semi-cylindrical RAS with a periodic square patterned layer using a conducting polymer was designed and simulated by a commercial 3-D electromagnetic field analysis program. The designed semi-cylindrical structure with low RCS was then fabricated using fiber-reinforced composites and conducting polymer materials. Finally, the radar cross-section was measured in order to evaluate the radar absorbing performance of the fabricated RAS at a compact range facility. The measured radar absorption of the fabricated RAS showed that the target's RCS declined in a range of 65% to 94% within the X-band relative to a non-radar absorbing specimen.
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Keywords: CIRCUIT ANALOG ABSORBER; CONDUCTING POLYMER; FIBER-REINFORCED COMPOSITES; RADAR ABSORBING STRUCTURES; RADAR CROSS-SECTION

Document Type: Research Article

Affiliations: 1: School of Mechanical, Aerospace and Systems Engineering, Department of Aerospace Engineering, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea 2: School of Mechanical, Aerospace and Systems Engineering, Department of Aerospace Engineering, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea;, Email: [email protected] 3: The 1st R&D Institute-3, Agency for Defense Development, 111 Sunam-dong, Yuseong-gu, Daejeon 305-152, Republic of Korea 4: Composite Materials Laboratory, Korea Institute of Machinery and Materials, 66 Sangnam-dong, Changwon 641-010, Republic of Korea

Publication date: 2011-03-01

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