THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jul.; 30(7),

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1 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jul.; 30(7), ISSN (Print) ISSN X (Online) Design of Paper-Based Frequency Selective Surface with Ultra-Wideband Rejection 김호진 조성실 김윤재 홍익표 Ho-Jin Kim Sung-Sil Cho Yoon-Jae Kim* Ic-Pyo Hong 요약 UWB., GHz, (TE, TM) (0 45 ),. Abstract In this paper, we propose a paper-based very thin ultra-wideband(uwb) frequency selective structure to block UWB radar or broadband interfering signals. The proposed structure combines a square loop structure with low frequency blocking characteristics and a fan-wing structure with high frequency blocking characteristics to realize wideband rejection. Resistive elements were added to compensate for polarization and incident angle stability. Based on the simulation results, we fabricated conductive patterns and resistive elements on a thin paper using the screen printing technique. We measured the transmission characteristics of the fabricated frequency selective structure using the free space measurement method and found that it has a wide bandwidth of 6.9 GHz and stable performance despite the variation in polarization and incident angle. Key words: Paper-Based Frequency Selective Structure, Ultra-Wideband, Incidence Angle Stability, Screen Printing. 서론 UWB (Ultra-wideband)., (UD170044JD). (Department of Information & Communication Engineering, Kongju National University) * (Agency for Defense Development) Manuscript received February 14, 2019 ; Revised March 11, 2019 ; Accepted July 8, (ID No ) Corresponding Author: Ic-Pyo Hong ( iphong@kongju.ac.kr) 566 c Copyright The Korean Institute of Electromagnetic Engineering and Science. All Rights Reserved.

2 , [1].,. UWB, / (frequency selective surface: FSS) [2] [6]...,, [2],[3]. 2.5 FSS [4],[6].,.. PCB,,,,.,, FSS [7] [9]. UWB (TE, TM) (0 45 ) UWB FSS.,.. 설계및시뮬레이션 UWB FSS, GHz(7.6 GHz). TE 45 1 [10]. 4 UWB FSS [11]. 2 4, PCB 그림 1. Fig. 1. Design process of unit cell and simulated transmission characteristics. 567

3 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 30, no. 7, Jul 그림 2. Fig. 2. Geometry of proposed unit cell. (a) TE (a) TE mode 0.2 mm. (ε r ) (loss tangent) SPDR(Split Post Dielectric Resonators) (ε r ) 2.9, (loss tangent) MG Chemicals Ag/Cu, Bare Conductive Carbon. 4- MCP-T370, 1.2 Ω/sq, 55 Ω/sq. HFSS (floquet mode), (TE, TM) (0 45 ) /. 3, 7.9 GHz, 10 db GHz(7.4 GHz), 2.4 % (200 MHz). TE, TM (b) TM (b) TM mode 그림 3. / Fig. 3. Simulated transmission/reflection characteristics.,. FSS, TE cos, Q-factor. TM cos, Q-factor [12]. FSS( ) FSS( ) [10] FSS TE 568

4 Q-factor, TM Q-factor.. 제작및측정 UWB FSS mm(10 10 ) UWB FSS, 4. 5 UWB FSS, /. / (TE, TM),. /., 7.85 GHz, 10 db GHz(6.9 GHz), (TE, TM) (0 45 ) 3.1 %(250 MHz) 6., TM % (220 MHz). 그림 5. Fig. 5. Measurement system. UWB FSS, 1, 45. FSS [13]., 7 25 %., /.. 결론 그림 4. UWB FSS Fig. 4. Fabricated UWB FSS. UWB FSS,.,. PCB 569

5 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 30, no. 7, Jul (a) TE (a) TE mode 그림 7. Fig. 7. Simulated and measured absorptivity., 6.9 GHz. References (b) TM (b) TM mode 그림 6. / Fig. 6. Measured transmission/reflection characteristics. 표 1. UWB FSS Table 1. Performance comparison of UWB FSS. Ref. Profile (mm) Sim. BW (GHz) Fraction BW (%) Angular sensitivity Design description [2] Not reported Double layer [4] Metallic vias [5] Not reported High ε r [6] This paper Not reported Single side Single side [1] X. Zhuge, A. G. Yarovoy, T. Savelyev, and L. Ligthart, "Modified Kirchhoff migration for UWB MIMO arraybased radar imaging," IEEE Transactions on Geoscience and Remote Sensing, vol. 48, no. 6, pp , Jun [2] Y. Ranga, L. Matekovits, K. P. Esselle, and A. R. Weily, "Multioctave frequency selective surface reflector for ultrawideband antennas," IEEE Antennas and Wireless Propagation Letters, vol. 10, pp , Mar [3] A. A. Dewani, S. G. O Keefe, and D. V. Thiel, "Transmission bandwidth enhancement using lateral displacement in a thin flexible single layer double sided FSS," in 2015 International Symposium on Antennas and Propagation (ISAP), Hobart, TAS, 2015, pp [4] B. Hua, X. He, and Y. Yang, "Polarisation-independent UWB frequency selective surface based on 2.5D miniaturised hexagonal ring," Electronics Letters, vol. 53, no. 23, pp , Nov [5] R. Yahya, A. Nakamura, M. Itami, and T. A. Denidni, "A novel UWB FSS-based polarization diversity antenna," 570

6 IEEE Antennas and Wireless Propagation Letters, vol. 16, pp , Jul [6] F. C. G. da Silva Segundo, A. L. P. S. Campos, and E. C. Braz, "Wide band frequency selective surface for angular and polarization independent operation," Microwave and Optical Technology Letters, vol. 57, no. 1, pp , Nov [7] A. A. Dewani, S. G. O Keefe, D. V. Thiel, and A. Galehdar, "Window RF shielding film using printed FSS," IEEE Transactions on Antennas Propagation, vol. 66, no. 2, pp , Feb [8] D. Dawod, N. Qasem, "Enhancing the capacity of MIMO systems via modified building using frequency selective wallpapers," in th International Conference on Information and Communication Systems(ICICS), Amman, 2015, pp [9] U. Farooq, M. F. Shafique, and M. J. Mughal, "Polarization insensitive dual band frequency selective surface for RF shielding through glass windows," IEEE Transactions on Electromagnetic Compatibility, pp. 1-8, Feb [10] B. A. Munk, Frequency Selective Surfaces: Theory and Design, New York, NY, John Wiley & Sons, pp. 4, 35-37, [11] S. Ghosh, S. Bhattacharyya, and K. V. Srivastava, "Design, characterisation and fabrication on a broadband polarisation-insensitive multi-layer circuit analogue absorber," IET Microwaves, Antennas Propagation, vol. 10, no. 8, pp , May [12] P. C. Zhao, Z. Y. Zong, W. Wu, B. Li, and D. G. Fang, "An FSS structure with geometrically separable meanderline inductors and parallel-plate capacitors," IEEE Transactions on Antennas and Propagation, vol. 65, no. 9, pp , Sep [13] B. A. Munk, D. S. Janning, J. B. Pryor, and R. J. Marhefka, "Scattering from surface waves on finite FSS," IEEE Transactions on Antennas and Propagation, vol. 49, no. 12, pp , Dec [ / ] https: //orcid.org/ : [ 주관심분야 ] [ / ] https: //orcid.org/ x : ( ) : ( ) : [ 주관심분야 ] 571

7 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 30, no. 7, Jul [ / ] https: //orcid.org/ : ( ) : ( ) : : 7 3 [ 주관심분야 ],, [ / ] https: //orcid.org/ : ( ) : ( ) : ( ) : : Texas A & M University, Visiting Scholar : Syracuse University, Visiting Scholar : [ 주관심분야 ], 572