EMP 표 1. Table 1. Status of electromagnetic shielding military targets and constructed military unit. /

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1 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Apr.; 25(4), ISSN (Print)ISSN X (Online) EMP Electromagnetic Pulse Coupling into Naval Warship and Protective Measures 양진호 남상욱 Jin-Ho YangSang-Wook Nam 요약 (HEMP). Bell IEC HEMP.,,., IEC Bell, IEC HEMP. HEMP,, TVS. Abstract The high-altitude electromagnetic pulse(hemp) generated by a high-altitude nuclear explosion. This paper presents the comparison of electric field penetration in Bell laboratories and IEC standard when HEMP source penetrates through Naval Warship conducted coupling path and radiated coupling path. Also we analyze the effects of two kinds of coupling and propose Protective measures. Simulation results confirm IEC standard is more strict than the Bell Laboratories standard except for a lower frequency band, so we proposed IEC standard as a Naval HEMP standard. Finally, we offer the protective measures such as the shielding coating, Honeycomb ventilation, TVS in order to meet the military criteria. Key words: EMP, HEMP, Front-Door/Back-Door Coupling, Shielding Effectiveness, Navy. 서론 Forrestal [1]., [2]. (HEMP) 2013 (ICT) (Department of Electrical and Computer Engineering, Seoul National University) Manuscript received December 5, 2013 ; Revised February 19, 2014 ; Accepted February 24, (ID No ) Corresponding Author: Sang-Wook Nam ( snam@snu.ac.kr) 426 c Copyright The Korean Institute of Electromagnetic Engineering and Science. All Rights Reserved.

2 EMP 표 1. Table 1. Status of electromagnetic shielding military targets and constructed military unit. / ,.. 전자기펄스기본개념및관련이론 2-1 HEMP 특성및형태 HEMP(High Altitude Electromagnetic Pulse) EMP. HEMP HEMP, HEMP, HEMP 3. HEMP Bell IEC (1) (1) t, 2. 1 Bell IEC HE- MP [3]. 표 2. HEMP Table 2. Early HEMP waveform parameter. Bell Labs IEC (kv/m) K ( ) ( ) ns 2.5 ns FWHM 184 ns 23 ns 그림 1. HEMP Fig. 1. Two kinds of HEMP waveform standard. 2-2 복사성 / 전도성결합.,. EMP Aperture slot, POE(Points of Entry) EMP [4],[5].. 전자파차폐이론및기준 3-1 차폐효율 (Shielding Effectiveness) 2, (2) [6]. (2) (2),., 80 db., 427

3 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 25, no. 4, Apr 그림 2. Fig. 2. Requirement of shielding performance of U.S. Department of Defense. 그림 4. Fig. 4. Double exponential waveform. 표 3. PCI Table 3. PCI test waveforms. ns s s ns 35 ms 2025 s 2,500 A 250 A 1,000 A 1 A 1 A 1 A 그림 3. Fig. 3. Requirement of shielding performance of naval surface warship., //., // (//). (MIL-STD-461E, RS103) db( 74 db). 3-2 Pulse Current Injection 테스트 PCI,. HEMP HEMP 4, HEMP MIL-STD HEMP 3 [7]. HEMP 2,500 A HEMP. MIL-STD , 1 A.. 시뮬레이션결과및분석 4-1 해군함정모델링및 EMP 결합경로 5. EMP, (, ),. 428

4 EMP 그림 5. EMP Fig. 5. Naval warship modeling & EMP coupling path. Material (Lossy metal, Electric Conductivity: [S/m]). Simulator (mesh, ), EMP,. 6 (,, ), ( ), (Probe). 6 PEC =0, (Freespace). Bell IEC HEMP, [3]. IEC Bell 10 MHz,., [3],, IEC Bell 9 MHz, 28 %, 34 %. HEMP IEC ,. 4-3 시뮬레이션결과 복사성결합결과, db 복사성피해신호대책및적용결과, EMP 4-2 Excitational Signal 그림 6. Fig. 6. Measurement location of electromagnetic wave & boundary condition around naval warship. 그림 7. / (SE) Fig. 7. Shielding effectiveness of bridge/commroom. 429

5 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 25, no. 4, Apr 그림 8. EMP Fig. 8. Protective measures of EMP radiated coupling. 그림 m Fig. 10. Attenuation constant of coaxial cable(1.5 m). 그림 9. EMP SE Fig. 9. SE after applying protective measures of EMP radiated coupling.. MIL-STD , Honeycomb [8]., mesh, mesh 20 um. Honeycomb cell 3.2 mm, Waveguide-Below-Cutoff Array length 5 cm. EMP, 9 74 db 전도성결합결과 10,, (3). ln (3) CST-CS 11 Input, Output, 01.5 GHz 100 MHz Sweep, CST-CS Simulator 정확도분석 1.5 m (RG-58) (α), CST-MW, CST-CS. 그림 11. CST-CS Fig. 11. Schematic of coaxial cable using CST-CS. 430

6 EMP 그림 12. Fig. 12. Antenna cable of naval warship & modeling. 그림 14. input output Fig. 14. Input and output of injection current of naval warship antenna.., 8.5 m output ns Time delay. Time delay (4). nsm (4) 그림 13. Fig. 13. Schematic of naval warship antenna cable & excitational signal 함정의안테나케이블결합결과 Cable 12, CST-CS. ( 12) CST-CS 13, HEMP. P1P3 input, P4P6 output. 2,500 A HEMP 14 2,390 A () 2.3. (4) ns,. 2,390 A 1 A, system 전도성피해신호대책및적용결과 15 TVS. TVS Transient Voltage Suppression Diode. TVS TVS (Clamping Voltage),. 431

7 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 25, no. 4, Apr 결론 그림 15. TVS Fig. 15. TVS diode. HEMP IEC HEMP., HEMP, Honeycomb (SE) 74 db, TVS 0.8 A.,, EMP. EMP ( ),. References 그림 16. TVS Fig. 16. Schematic using TVS diode. CST-CS On Semiconductor TVS NSA5.OAT Datasheet 16. ( 16), 17 P4P6 0.8 A 1 A. 그림 17. TVS Fig. 17. Inside residual current output after applying TVS diode. [1], "EMI/EMC ",, [2], " EMP ", News1. [3],,,, "HEMP ",, 21(12), pp , [4] Hui-cheng Xia, Shi-liao Zhang, and Jian-zho Maou, "Analyze on the EMP weapon damage to the ship electronics system", Fire Control & Command Control, vol. 35, no. 7, [5] Kelong Zhen, Shanwei Lv, and Yan Zhang, "Research on damage of intense electromagnetic pulse to radar receiving system", Global Symposium on Milimeter Waves (GSMM), [6] Military Standard - "High-Altitude Electromagnetic Pulse (HEMP) protection for ground-based C4I facilities performing critical, tine-urgent missions, Part 1 fixed facilities", MIL-STD , Dept. of Defense, Washington, DC. Apr

8 EMP [7], "HEMP (PCI) ",, 24(8), pp , [8], "EMP ",, 24(1), pp , [9] Edoardo Genovese, "Real world cable modeling in CST studio suite", CST Workshop Series 2010, Feb : () : () [ 주관심분야 ] FDTD, EMP : ( ) : () 1989: Electrical Engineering at the University of Texas at Austin () 1990: [ 주관심분야 ] /,, 433

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