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Korean Journal of Metals and Materials > Volume 55(6); 2017 > Article
Korean Journal of Metals and Materials 2017;55(6): 412-418. doi: https://doi.org/10.3365/KJMM.2017.55.6.412
변형된 사각 루프 주파수 선택 표면의 인덕턴스, 커패시턴스 계산 및 전파흡수특성
류전, 김성수
충북대학교 신소재공학과
Calculation of Inductance, Capacitance, and Microwave Absorbance of Modified Square Loop Frequency Selective Surface
Tian Liu, Sung-Soo Kim
Department of Advanced Materials Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea
Correspondence  Sung-Soo Kim ,Tel: +82-43-261-2418, Email: sskim@cbnu.ac.kr
Received: 13 September 2016;  Accepted: 10 January 2017.  Published online: 1 June 2017.
ABSTRACT
The square loop (SL) is the typical pattern of a frequency selective surface (FSS) with high inductance (L) and capacitance (C). In this study, modified patterns including split square loop FSS (SSL-FSS) and I-type FSS (I-FSS) are proposed, and their L and C values were estimated using the equivalent circuit model. The insertion of an air gap in the SL conductor stripes decreased both L and C, due to the reduction in stripe length. Meanwhile, when I-FSS was polarized in parallel with an electric field, it had the effect of reducing stripe width and, thereby, exhibited a higher value of L. Using the retrieved L and C values, microwave absorbance can be determined in the three-layer structure composed of FSS on a grounded dielectric substrate. The simulation results obtained with computational tool provided almost the same reflection loss result, which indicates that the equivalent circuit approach is reliable and efficient for determining the L, C values of various FSS.
Keywords: electric properties, magnetic properties, computer simulation, frequency selective surface, microwave absorber
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