Article
Mechanics
Min-Su Jang, Woo-Hyeok Jang, Do-Hyeon Jin, Won-Ho Choi, Chun-Gon Kim
Summary: A circuit-analog broadband radar-absorbing structure with improved mechanical properties was proposed based on a periodic pattern etched on the Ni-coated fabric. Utilizing a genetic algorithm optimization, the structures exhibited >90% electromagnetic wave absorption performance in the C- and X-bands. Mechanical tests confirmed the enhancements in mechanical properties without compromising the absorption capabilities.
COMPOSITE STRUCTURES
(2022)
Article
Chemistry, Physical
Wei Wang, Yan Wang, Zhao Lu, Runrun Cheng, Hao Zheng
Summary: A multiple-component aerogel-based microwave absorber was synthesized, with ultrabroad bandwidth (9.1 GHz) and strong absorption (reflection loss of -65.2 dB). The aerogel exhibited strong hydrophobicity and excellent thermal insulation properties. This study provides new insights into the design of next-generation microwave absorbing materials with multifunctional application.
Article
Optics
Zicheng Song, Jiaqi Zhu, Lei Yang, Pingping Min, Feng Han Lin
Summary: A framework was formulated to extend the application of the theory of characteristic modes to the analysis and design of metabsorbers, addressing the challenging lossy characteristic of ultra-wideband metasurface absorbers. By introducing absorption modes, a dual-band metabsorber was converted into an ultra-wideband metabsorber, achieving a wider bandwidth coverage.
Article
Nanoscience & Nanotechnology
Wen Wang, Xiaojie Deng, Dongqing Liu, Feng Luo, Haifeng Cheng, Taishan Cao, Yuelin Li, Yingjun Deng, Wei Xie
Summary: This paper introduces a radar-absorbing material with a square pore structure prepared by 3D printing and coating dipping methods, and conducts a gradient optimization design of sheet resistance for the structure, showing that gradient design can improve radar-absorbing performance.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Multidisciplinary Sciences
Priyanka Tiwari, Surya Kumar Pathak, Varsha Siju
Summary: This paper presents the design, development and characterization of a broadband, polarization insensitive metasurface absorber. The optimized design, verified analytically and experimentally, achieves significant reduction in reflection and can be practically used in different geometrical shapes for radar stealth applications.
SCIENTIFIC REPORTS
(2022)
Article
Mechanics
Won-Ho Choi, Hyeon-Seok Choe, Young-Woo Nam
Summary: This study developed a multifunctional SHIMAC with microwave absorption and hypervelocity impact-shielding capabilities. Experimental results demonstrated that the SHIMAC has excellent microwave absorption performance and hypervelocity impact-shielding performance.
COMPOSITE STRUCTURES
(2021)
Article
Optics
Ruichao Zhu, Zhongtao Zhang, Jiafu Wang, Cuilian Xu, Sai Sui, Xiaofeng Wang, Tonghao Liu, Ying Zhu, Lei Zhang, Jun Wang, Shaobo Qu
Summary: A multispectral functional metasurface (MFM) was designed in this work to achieve multispectral compatibility between microwave and infrared using multi-optimization. The performance was validated through fabrication and measurement, demonstrating wide application value in radome and potential extensions to other fields.
Article
Optics
Zhiqiang Gao, Cuilian Xu, Xiaoxia Tian, Jiafu Wang, Changhui Tian, Baiyu Yang, Shaobo Qu, Qi Fan
Summary: Optically transparent metamaterials designed and manufactured based on continuous research in single-band stealth technology exhibit high broadband absorption and emissivity, as well as optical transparency at wide angles. The material's ability to be bent expands its potential applications, with experimental results matching theoretical calculations and simulations.
Article
Materials Science, Multidisciplinary
Zhiqiang Gao, Qi Fan, Xiaoxia Tian, Cuilian Xu, Zhen Meng, Sining Huang, Tong Xiao, Changhui Tian
Summary: A novel optically transparent broadband metamaterial absorber has been proposed, which can absorb broad-band microwave and reduce infrared radiation simultaneously with high efficiency and optical transparency. The use of a water circulation system can significantly decrease infrared radiation, achieving infrared stealth. With its versatility and exceptional performance, this design is expected to have extensive applications in multi-spectrum stealth.
Article
Nanoscience & Nanotechnology
Lihong Wang, Shunlin Su, Yude Wang
Summary: Fe3O4-graphite composites prepared through a solvothermal method exhibit excellent bimodal microwave absorption performance with good electromagnetic properties and impedance matching characteristics. Fe3O4-2PG sample shows good absorption peaks in both C-band and Ku-band, broadening the absorption bandwidth of electromagnetic waves.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Jiandong Wu, Yang Feng, Ying Xia, Qing Zhu, Liping Luo, Lan Ma, Haiming Li, Hongxia Yan, Shuhua Qi
Summary: By loading highly defective TiO2 onto an MXene sheet with S-doping and high-temperature annealing treatment, the impedance-matching properties were optimized, enhancing the electromagnetic wave absorption effect and improving the performance of MXene EMW absorbers.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Xueyu Xiang, Zhihong Yang, Gang Fang, Yu Tang, Yuping Li, Yujing Zhang, Dong-Hyun Kim, Chuyang Liu
Summary: In this review, the characteristics of typical ferrites for microwave absorption and their suitable synthesis techniques are systematically introduced. The various tailoring tactics, including ions doping, magnetic coupling, integration of magnetic and dielectric properties, and structure design, are thoroughly compared. Furthermore, an in-depth investigation on performance enhancement and internal optimization mechanisms of ferrite MAMs is carried out, and the development directions and future prospects for ferrite MAMs are proposed and predicted.
MATERIALS TODAY PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Abhinav Bhardwaj, Gaganpreet Singh, Kumar Vaibhav Srivastava, J. Ramkumar, S. Anantha Ramakrishna
Summary: A simple optically transparent absorber based on a double complementary structured layer of ITO deposited polyethylene terephthalate film is presented. The structure exhibits high absorption from 2 to 4.5 GHz frequencies, has polarization-insensitive response and is highly stable for oblique wave incidence. It can be flexibly wrapped on curved surfaces and reduces the radar cross section.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Yue Li, Peng-Fei Gu, Zi He, Zihao Cao, Jun Cao, Kwok Wa Leung, Dazhi Ding
Summary: This article presents an ultrawideband absorber designed using an equivalent circuit model (ECM). The accuracy of the design method was verified through full-wave simulations. The results demonstrated that the absorber achieved the desired frequency responses, including single narrow absorption band, dual-band absorption peak, and ultrawide absorption band. Experimental testing of a quadruple-layer absorber showed a 10 dB reduction in radar cross section from 2.1 to 37.5 GHz with a bandwidth ratio of 17.62:1. Furthermore, the absorber's parameters were optimized using the space mapping (SM) technique to extend the high-frequency absorption bandwidth, resulting in a 10 dB reduction from 3 to 94 GHz with a bandwidth ratio of 31.33:1.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Chemistry, Physical
Jialing Wang, Ming Zhou, Zhengchan Xie, Xingyu Hao, Shaolong Tang, Jingwen Wang, Zhongqiu Zou, Guangbin Ji
Summary: This study demonstrates the synthesis of porous carbon with a flower cluster microstructure from mango seed biomass waste and its excellent microwave absorption performance. The material shows reduced density, improved impedance matching, and superior microwave absorption. By adjusting the amount of activator, the absorption performance can be further enhanced, and it also has significant applications in radar scattering.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Multidisciplinary
Hyunseok Kwon, Yurim Park, Pratik Shrestha, Chun-Gon Kim
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2019)
Article
Engineering, Multidisciplinary
Hyunseok Kwon, Yurim Park, Jin-Hyuk Kim, Chun-Gon Kim
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2019)
Article
Instruments & Instrumentation
Hyunseok Kwon, Yurim Park, Chun-Gon Kim
SMART MATERIALS AND STRUCTURES
(2019)
Article
Engineering, Multidisciplinary
Jinbong Kim, Mungyu Jeong, Holger Bohm, Jonas Richter, Niels Modler
COMPOSITES PART B-ENGINEERING
(2020)
Article
Instruments & Instrumentation
Hyunseok Kwon, Yurim Park, Changkyo Shin, Jin-Hyuk Kim, Chun-Gon Kim
SMART MATERIALS AND STRUCTURES
(2020)
Article
Engineering, Mechanical
Geunsu Joo, Jinbong Kim, Mungyu Jeong, Youngchul Kim, Holger Bohm, Jonas Richter
Summary: This paper successfully simulates the energy absorption capability through calibrating the parameters of MAT54, showing good agreements with experimental results and verifying the applicability of the simulation.
INTERNATIONAL JOURNAL OF AUTOMOTIVE TECHNOLOGY
(2021)
Article
Polymer Science
Hong-Kyu Jang, Jinbong Kim, Ji-Sang Park, Jin Bum Moon, Jaecheol Oh, Woo-Kyoung Lee, Min-Gyu Kang
Summary: The study aims to prepare a resistive lossy material for electromagnetic wave absorbers using conducting polymers. A conductive paste composed mainly of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) with a polyurethane binder is presented. Various secondary compounds are added to enhance the electrical and mechanical properties, and the synthesized paste is characterized through electrical, chemical, and morphological analyses. The applicability of the paste is verified through the fabrication of a Salisbury screen absorber, which demonstrates excellent radar-absorbing performance.
Article
Engineering, Mechanical
Yurim Park, YunHo Kim, Changkyo Shin, Chun-Gon Kim
Summary: This study investigated the hypervelocity impact response of 6061-T6 aluminum plates using a 2-stage light gas gun and PVDF piezofilm sensors. The results showed that spectral entropy and conditional spectral and temporal moments were effective in differentiating impact categories, with a categorization accuracy of 91.3%. Furthermore, feature parameters such as the third order temporal moment, correlation dimension, and zero crossing rate exhibited statistically significant correlation with impact velocity.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Mechanics
Ji-Hun Cha, Sathish Kumar Sarath Kumar, Jung-Eon Noh, Joo-Seung Choi, YunHo Kim, Chun-Gon Kim
Summary: This study focuses on improving the interlaminar shear strength of UHC to enhance its cosmic radiation shielding performance for future satellites. The proposed material, with modifications such as polydopamine coating, MWCNT, and amine grafting, shows promising results and suitability for space environments.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Joo-Seung Choi, Hyun-Wook Park, Jung -Eon Noh, Jihun Cha, Woo-Hyeok Jang, Chun-Gon Kim
Summary: This study introduces a structure-battery-integrated energy storage system based on carbon and glass fabrics, providing stable and high electrochemical performance under mechanical loading. The system utilizes a thermoplastic tape to separate the battery and structural parts and prevent penetration and leakage. Evaluation shows initial capacity of approximately 125 mAh/gLFP and steady cycling characteristics of 110 mAh/gLFP for 50 cycles. The structure-integrated battery exhibits an energy density of over 25 Wh/kgstr and remains stable even under tensile strain beyond 1%.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
Sarath Kumar Sathish Kumar, YunHo Kim, Jihun Cha, Chun-Gon Kim
Summary: This study investigated the mechanism of improving the hypervelocity impact shielding efficiency of a stuffed Whipple shield design by enhancing the energy absorption of a fabric back bumper. Two different fabric systems were designed and evaluated, and a hybrid fabric system combining both designs showed significantly improved protection capability. This research has significant implications for enhancing hypervelocity impact protection technology.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Jinbong Kim, Hong-Kyu Jang, Jaecheol Oh, Jisang Park
Summary: This study proposes a rational optimum design procedure for broadband radar absorbers composed of a square-loop-shaped resistive frequency selective surface (FSS) placed on an E-glass fabric/epoxy laminate. The effects of the FSS surface resistance and dielectric substrate on the absorber design and performance are examined. The feasibility of the design method is validated through experimental demonstration and simulation results.
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
(2023)
Article
Engineering, Aerospace
Woo-Hyeok Jang, Sol Kim, Jung-Eun Noh, Joo-Seong Choi, Ji-Hun Cha, Chun-Gon Kim
Summary: This study proposes the use of a carbon-fiber-stitched substrate for designing a micro-strip-patch antenna, eliminating the disadvantages of traditional thick and complex manufacturing processes. The effectiveness of the carbon-fiber feeder was confirmed through simulation, and additional impedance matching was performed to reduce power loss. The antenna with the carbon-fiber feeder exhibited improved performance in reflection loss and gain.
INTERNATIONAL JOURNAL OF AERONAUTICAL AND SPACE SCIENCES
(2023)
Article
Engineering, Aerospace
Yurim Park, YunHo Kim, Changkyo Shin, Chun-Gon Kim
Summary: The study utilized hypervelocity impact experiments and numerical simulations to explore the importance of shielding system design for structure protection, with results indicating that increasing impact velocity leads to larger hole area and debris cloud impact radius.
INTERNATIONAL JOURNAL OF AERONAUTICAL AND SPACE SCIENCES
(2021)
Article
Engineering, Aerospace
Hyunseok Kwon, Yurim Park, Changkyo Shin, Jin-Hyuk Kim, Chun-Gon Kim
Summary: This study focused on in-flight strain monitoring of an aircraft tail boom structure using the FBG sensor-based aircraft HUMS, and verified the system's performance during actual flights by analyzing in-flight strain variations in comparison with flight parameters.
INTERNATIONAL JOURNAL OF AERONAUTICAL AND SPACE SCIENCES
(2021)
