THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 29(3),

Similar documents
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 26(11),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 10, Oct ,,. 0.5 %.., cm mm FR4 (ε r =4.4)

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 6, Jun Rate). STAP(Space-Time Adaptive Processing)., -

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Dec.; 27(12),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jan.; 26(1),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Feb.; 29(2), IS

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 30(3),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 27, no. 8, Aug [3]. ±90,.,,,, 5,,., 0.01, 0.016, 99 %... 선형간섭

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Feb.; 28(2),

05 목차(페이지 1,2).hwp

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jun.; 27(6),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 28(3),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 25(3),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jul.; 27(7),

04 최진규.hwp

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jul.; 27(7),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jun; 26(6),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Oct.; 27(10),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jun.; 27(6),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 28, no. 3, Mar guidance system: MGS), MGS. MGS, (pulse repetit

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 30(9),

(JBE Vol. 21, No. 1, January 2016) (Regular Paper) 21 1, (JBE Vol. 21, No. 1, January 2016) ISSN 228

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jun.; 27(6),

03 장태헌.hwp

04 김영규.hwp

09È«¼®¿µ 5~152s

08 박지훈.hwp

???? 1

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Dec.; 25(12),

10 노지은.hwp

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE May; 27(5),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Dec.; 26(12),

<353420B1C7B9CCB6F52DC1F5B0ADC7F6BDC7C0BB20C0CCBFEBC7D120BEC6B5BFB1B3C0B0C7C1B7CEB1D7B7A52E687770>

<313920C0CCB1E2BFF82E687770>

05 목차(페이지 1,2).hwp

<35335FBCDBC7D1C1A42DB8E2B8AEBDBAC5CDC0C720C0FCB1E2C0FB20C6AFBCBA20BAD0BCAE2E687770>

±è¼ºÃ¶ Ãâ·Â-1

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Aug.; 30(8),

04 박영주.hwp

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 25(11),

878 Yu Kim, Dongjae Kim 지막 용량수준까지도 멈춤 규칙이 만족되지 않아 시행이 종료되지 않는 경우에는 MTD의 추정이 불가 능하다는 단점이 있다. 최근 이 SM방법의 단점을 보완하기 위해 O Quigley 등 (1990)이 제안한 CRM(Continu

8-VSB (Vestigial Sideband Modulation)., (Carrier Phase Offset, CPO) (Timing Frequency Offset),. VSB, 8-PAM(pulse amplitude modulation,, ) DC 1.25V, [2

09권오설_ok.hwp

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE May; 26(5),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 27(3),

10(3)-09.fm

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 28(11),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 26(10),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 26(10),

High Resolution Disparity Map Generation Using TOF Depth Camera In this paper, we propose a high-resolution disparity map generation method using a lo

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 25(11),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Oct.; 27(10),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 26, no. 3, Mar (NFC: non-foster Circuit).,. (non-foster match

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE May; 29(5),

RRH Class-J 5G [2].,. LTE 3G [3]. RRH, W-CDMA(Wideband Code Division Multiple Access), 3G, LTE. RRH RF, RF. 1 RRH, CPRI(Common Public Radio Interface)

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jun.; 28(6),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Feb.; 30(2),

Journal of Educational Innovation Research 2018, Vol. 28, No. 1, pp DOI: * A Analysis of

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Apr.; 29(4),

03-서연옥.hwp

<31372DB9DABAB4C8A32E687770>

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jan.; 26(1), IS

°í¼®ÁÖ Ãâ·Â

04김호걸(39~50)ok

05( ) CPLV12-04.hwp

DBPIA-NURIMEDIA

<31325FB1E8B0E6BCBA2E687770>

디지털포렌식학회 논문양식

<30312DC1A4BAB8C5EBBDC5C7E0C1A4B9D7C1A4C3A52DC1A4BFB5C3B62E687770>

DBPIA-NURIMEDIA

06_ÀÌÀçÈÆ¿Ü0926

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 10, Oct , EBG. [4],[5],. double split ring resonator (D

10 이지훈KICS hwp

인문사회과학기술융합학회

. 서론,, [1]., PLL.,., SiGe, CMOS SiGe CMOS [2],[3].,,. CMOS,.. 동적주파수분할기동작조건분석 3, Miller injection-locked, static. injection-locked static [4]., 1/n 그림

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jun.; 29(6),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 26(11),

14.531~539(08-037).fm

DBPIA-NURIMEDIA

No

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 27(9),

example code are examined in this stage The low pressure pressurizer reactor trip module of the Plant Protection System was programmed as subject for

, V2N(Vehicle to Nomadic Device) [3]., [4],[5]., V2V(Vehicle to Vehicle) V2I (Vehicle to Infrastructure) IEEE 82.11p WAVE (Wireless Access in Vehicula

<31312DB1E8BCB1BFEB4B D30342D F31C2F7BCF6C1A4B0CBC5E4BABB2E687770>

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Feb.; 26(2),

Microsoft Word - KSR2016S168

DBPIA-NURIMEDIA

Journal of Educational Innovation Research 2017, Vol. 27, No. 4, pp DOI: A Study on the Opti

Journal of Educational Innovation Research 2017, Vol. 27, No. 2, pp DOI: : Researc

DBPIA-NURIMEDIA

Journal of Educational Innovation Research 2017, Vol. 27, No. 3, pp DOI: (NCS) Method of Con

24 GHz 1Tx 2Rx FMCW ADAS(Advanced Driver Assistance System).,,,. 24 GHz,, [1] [4]. 65-nm CMOS FMCW 24 GHz FMCW.. 송수신기설계 1 1Tx 2Rx FMCW (Local Oscillat

¼º¿øÁø Ãâ·Â-1

08 조영아.hwp

Journal of Educational Innovation Research 2018, Vol. 28, No. 3, pp DOI: NCS : * A Study on

012임수진

Journal of Educational Innovation Research 2018, Vol. 28, No. 4, pp DOI: * A Research Trend

<30362E20C6EDC1FD2DB0EDBFB5B4EBB4D420BCF6C1A42E687770>

À±½Â¿í Ãâ·Â

LCD [2].,. (TEMPEST).,,.... CRT(Cathode Ray Tube),, [3]. LCD(Liquid Crystal Display) [4]. LCD [5].,, VGA(Video Graphics Array) DVI (Digital Visu

Transcription:

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Mar.; 29(3), 233240. http://dx.doi.org/10.5515/kjkiees.2018.29.3.233 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) RCS Comparative Analysis of Effective RCS Prediction Methods for Chaff Clouds 김민 이명준 이성현 박성호 공영주 우선걸 김홍락 김경태 Min KimMyung-Jun LeeSeong-Hyeon LeeSung-ho Park*Young-Joo Kong* Seon-Keol Woo*Hong-Rak Kim*Kyung-Tae Kim 요약 (Radar Cross Section: RCS). RCS RCS RCS., FEKO 7.0 CAD RCS RCS., RCS. Abstract Radar cross section (RCS) analysis of chaff clouds is essential for the accurate detection and tracking of missile targets using radar. For this purpose, we compare the performance of two existing methods of predicting RCS of chaff clouds. One method involves summing up the RCS values of individual chaffs in a cloud, while the other method predicts the RCS values using aerodynamic models based on the probability density function. In order to compare and analyze the two techniques more precisely, the RCS of a single chaff computer-aided design model consisting of a half wavelength dipole was calculated using the commercial electromagnetic numerical analysis software, FEKO 7.0, to estimate the RCS values of chaff clouds via simulation. Thus, we verified that our method using the probability density distribution model is capable of analyzing the RCS of chaff clouds more efficiently. Key words: Chaff Cloud, Radar Cross Section, Aerodynamic Model, High Resolution Range Profile. 서론. (radar cross section, RCS) [1], RCS. LIG. (Department of Electronic Engineering, Pohang University of Science and Technology) *LIG(LIGnex1) Manuscript received February 28, 2018 ; Revised March 20, 2018 ; Accepted March 22, 2018. (ID No. 20180228-026) Corresponding Author: Kyung-Tae Kim (e-mail: kkt@postech.ac.kr) c Copyright The Korean Institute of Electromagnetic Engineering and Science. All Rights Reserved. 233

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 3, Mar. 2018. RCS [2]., RCS RCS (chaff cloud). RCS. RCS RCS, [2],[3]., RCS. [4] (probability density distribution) RCS. RCS RCS [2],[3] [4] 1 2. RCS FEKO 7.0(EM Software & Systems). (1), RCS. (line of sight), [5]. 2-2 방법 2 [4] RCS 2. 1, RCS. 2 RCS RCS. 2-2-1 수직및수평방향의확률밀도분포 RCS 1 1.,, ( ) (flow model) (linear Stokes equation) [6].. 2-1 방법 1. 채프구름의 RCS 예측방법 1 RCS [3]. (1) 그림 1. Fig. 1. The dipole chaff. 234

RCS, [6]. ln sin ln sincos ln (3) 0. (atmospheric viscosity),,. (2).,. (5) 0, 40 [7].. 2 (helical motion model) [8]., (2) (4) (5) (6) 그림 2. Fig. 2. Helical motion model. Ω. Ω sin Ω (7). Ω sin Ω sin Ω (8) 1. [6]. 2-2-2 채프구름의 RCS 계산, RCS RCS. (9) (10) 235

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 3, Mar. 2018. (10) cos sin, [5]. RCS. RCS,. RCS [4]., RCS RCS. (11) RCS RCS. (12).. 시뮬레이션결과 3-1 수치해석기법을이용한단일채프 RCS 계산 RCS 3(a) computer aided design(cad) FEKO 7.0. (a) RCS (a) Geometry for RCS estimation (b) 0 RCS (b) RCS at a certain elevation angle(0 ) (c) 20 RCS (c) RCS at a certain elevation angle(20 ) (d) 45 RCS (d) RCS at a certain elevation angle(45 ) (e) 60 RCS (e) RCS at a certain elevation angle(60 ) (f) 90 RCS (f) RCS at a certain elevation angle(90 ) 그림 3. RCS (0, 20, 45, 60, 90 ) RCS Fig. 3. Geometry for chaff RCS computation and Chaff RCS according to azimuth angle at a certain elevation angle(0, 20, 45, 60, 90 ). 236

RCS,, 16.4 GHz = 0.009 m 15 μm [2]. RCS 1 0 90, RCS RCS (look-up table). 3(b) 3(f) 16.4 GHz 0, 20, 45, 60, 90, RCS. 45, RCS VV HH, (0 40 ). 1,000,000. 13 0.5, 2 10,000. 1 2 RCS 4. RCS, 1 2 32.1998 0.2755. 2 =1,000,000, 2 RCS 3-2 채프구름 RCS 계산및분석 RCS RCS. i7-7700k CPU @ 3.5 GHz, 16 GB RAM Desktop MATLAB R2017b. RCS RCS ( 1) ( 2). RCS RCS. RCS 16.4 GHz, (1) 1. 1 km 30 m, 0 m RCS 0. 100 (Monte-Carlo simulation). RCS = (a) RCS(HH ) (a) RCS of chaff cloud over time(hh) (b) RCS(VV ) (b) RCS of chaff cloud over time(vv) 그림 4. RCS Fig. 4. RCS of chaff cloud over time. 237

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 3, Mar. 2018.. HH, 1 2 RCS. (13) 1, 2 RCS(dBsm). 5(a) t=3, t=8, t=13 =1,000 1,000 =20,000. =1,000 1.26 %, 9.66 % 6.82 %, = 10,000 5%. 1 2 RCS 1. 5(b) VV 2 RCS 2 RCS. HH 10 % VV RCS 10 db RCS. 2 1 RCS.. 결론 RCS RCS [2] [4] RCS. (a) 2 RCS (HH) (a) RCS error of chaff cloud according to (HH) 표 1. (HH ) Table 1. Simulation result(hh). t 3s 8s 13s (b) 2 RCS (VV) (b) RCS error of chaff cloud according to (VV) 그림 5. 2 RCS Fig. 5. RCS error of chaff cloud according to. 1 RCS 21.19 dbsm 21.18 dbsm 16.96 dbsm 2 RCS ( =1,000) 20.92 dbsm 19.14dBsm 15.8 dbsm 2 RCS ( =10,000) 2 RCS ( =17,000) 21.17 dbsm 20.55 dbsm 15.16 dbsm 21.19 dbsm 20.64 dbsm 16.15 dbsm 1 32.1998s 2 ( =1,000) 0.2507s 2 ( =10,000) 2 ( =17,000) 0.2755s 0.3171s 238

RCS 표 2. (VV ) Table 2. Simulation result(vv). t 3s 8s 13s 1 RCS 8.42 dbsm 8.23 dbsm -27.7 dbsm 2 RCS ( =1,000) 2 RCS ( =10,000) 5.5 dbsm -0.57 dbsm -28.3 dbsm 7.64 dbsm 6.75 dbsm -27.4 dbsm 2 RCS ( =17,000) 1 32.6769s 2 ( =1,000) 2 ( =10,000) 2 ( =17,000) 7.69 dbsm 7.22 dbsm -27.4 dbsm 0.2507s 0.2761s 0.3160s, RCS 100, RCS 1 100., HH 5% 100. [4],. References [1],,,,,,, ",", 28(7), pp. 584-587, 2017 7. [2] N. Kruger, "Modeling the EM properties of dipole reflections with application to uniform chaff clouds," Master s thesis, University of Stellenbosch, Matieland, South Africa, Dec. 2009. [3] G. W. Stimson, Introduction to Airborne Radar(Aerospace & Radar Systems), 3rd ed. SciTech Publishing, 2014. [4] S. W. Marcus, "Dynamics and radar cross section density of chaff clouds," IEEE Transactions on Aerospace and Electronic Systems, vol. 40, no. 1, pp. 93-102, Jan. 2004. [5] S. J. Lee, S. J. Jeong, B. S. Kang, H. Kim, S. M. Chon, and H. G. Na, et al., "Classification of shell-shaped targets using RCS and fuzzy classifier," IEEE Transactions on Antennas and Propagation, vol. 64, no. 4, pp. 1434-1443, Apr. 2016. [6] J. Happel, H. Brenner, Low Reynolds Number Hydrodyamics: With Special Applications to Particulate Media. Leyden, Netherlands: Noordhoff, 1973. [7] B. C. F. Butters, "Chaff," in Communications, Radar and Signal Processing, in IEE Proceedings F, Jun. 1982, vol. 129, no. 3, pp. 197-201. [8] J. Brunk, D. Mihora, and P. Jaffe, Chaff Aerodynamics, Report AFAL-TR-75-81, Nov. 1975. 2015 2: ( ) 2017 2: ( ) 2017 3~: [ 주관심분야 ],, EMI/EMC 2014 8: () 2017 2: () 2017 3: [ 주관심분야 ],, 239

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 3, Mar. 2018. 2013 2: () 2015 2: () 2015 3: [ 주관심분야 ],, 2001 2: ( ) 2003 2: ( ) 2007 7: ( ) 2007 8: LIG() [ 주관심분야 ], 2006 3: () 2008 8: () 20008 9: LIG [ 주관심분야 ], M&S, 1995 2: () 1997 8: ( ) 1997 7: LIG() [ 주관심분야 ], 2009 2: () 2009 1: LIG [ 주관심분야 ], 1994 2: () 1996 2: () 1999 2: () 2002 32011 2: 2011 3: 2012 9: /IR [ 주관심분야 ],, RCS 240