THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 26, no. 12, Dec 또한, 최근 위성통신은 점차 많은 데이터량과 주파수 활용문제로 인하여 Ka 인 초고
|
|
- 고준 영
- 6 years ago
- Views:
Transcription
1 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Dec.; 26(12, ISSN (Print ISSN X (Online GaN HPA MMIC Ka 25 W Design and Fabrication of 25 W Ka-Band Based on GaN HPA MMICs 지홍구 노윤섭 최윤호 곽창수 염인복 서인종 박형진 조인호 남병창 공동욱 Hong-gu Ji Youn-sub Noh Youn-ho Choi Chang-soo Kwak In-bok Youm In-jong Seo* Hyung-jin Park* In-ho Jo* Byung-chang Nam** Dong-uk Kong*** 요약 Ka 25 W 0.15 μm GaN (Drive Amplifier : DRA (High Power Amplifier : HPA (Monolithic Microwave Integrated Circuit : MMIC, (Solid State Power Amplifier MS-to-WR28 WR28, Ka GaN., GHz 44.2 m, 16.6 %, Abstract We designed and manufactured Ka-band include drive amplifier and high power amplifier MMICs by 0.15 μm GaN commercial process. Also, we fabricated main components micro-strip line to WR28 waveguide transition and WR28 wave guide power combiner for Ka-band. This Ka-band shows saturated output power 44.2 m, power added efficiency 16.6 % and power gain 39.2 at GHz frequency band. Key words: Ka-Band,, MMIC, Transition, Combiner. 서론 GaN, (Solid State Power Amplifier (High Power Amplifier : HPA. Ka GaAs HPA MMIC(Monolithic Microwave Integrated Circuit, GaN MM- IC GaAs MMIC.,. (Electronics and Telecommunications Research Institute * (Ace Technologies ** (U-tel *** (RF-core Manuscript received October 21, 2015 ; Revised December 4, 2015 ; Accepted December 8, (ID No Corresponding Author: Hong-gu Ji ( hkji@etri.re.kr c Copyright The Korean Institute of Electromagnetic Engineering and Science. All Rights Reserved. 1083
2 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 26, no. 12, Dec 또한, 최근 위성통신은 점차 많은 데이터량과 주파수 활용문제로 인하여 Ka 인 초고주파 까지 용하 게 되었다. 우리나라 천리안 위성을 포함하여 여러 선진 국에서 Ka 위성방송을 활용하여 이미 고화질 방송 을 실시하고 있으며, 앞으로 세계 여러 나라에서 위성통 신 및 방송 으로 Ka 주파수를 주목하고 있다. 따라서 본 논문에서는 이러한 위성통신용 인 GHz에서 상용 GaN 공정을 이용하여 구동증폭기(Drive Amplifier : DRA 및 HPA MMIC를 설계 및 제작하고, 이를 전력 합성하여 25 W급 를 설계 및 제작하여 고온에서 특성 평가하는 과정을 기술하고자 한다. [1] Ⅱ. 구성 어지며, 전원 공급과 온도 및 전류를 모니터를 할 수 있는 전원 제어부로 설계되었다. Ⅲ. 구성품 3-1 GaN DRA MMIC 는 0.15 μm GaN 상용공정인 미국 TriQuint의 공정을 이용하여 게이트 폭 8 50 μm 소자를 1:2:4 구조 로 배치한 3단 증폭기로 설계되었다. 그림 2는 DRA 회로 도와 제작된 진이며, 최종 칩 크기는 mm 이다. 제작된 DRA MMIC는 유테틱(Eutetic 공정으로 캐리어 (Carrier에 접합하여 측정을 위한 지그(Jig 체결 후 소신 DRA 2 그림 1은 GaN MMIC 기반 Ka 의 구성을 도 식한 그림이다. 의 증폭도 및 전력을 고려하여 1:4 구조로 설계되었으며, RF 증폭부의 입출력 인터페이스는 각각 2.9 mm SMA(Surface Mounted Adaptor와 EIA(Electrical Industry Association 규격인 구형 mm 크 기의 WR28 도파관이다. 의 RF 증폭부는 GaN 상용 파운드리 서비스를 이용하여 설계 제작된 DRA, HPA MMIC 및 SMA-to-WR28 변환기(transition, 1:4 Wilkinson 전력 분배기, 4:1 WR28 도파관 전력 합성기로 구성되 2 회로도 (a DRA MMIC (a DRA MMIC schematic 진 의 구성 그림 1. Ka Fig. 1. Configuration of the Ka-band (b DRA MMIC (b DRA MMIC photograph 회로도와 진 그림 2. Ka GaN DRA MMIC Fig. 2. Schematic and photograph of the Ka-band GaN DRA MMIC.
3 GaN HPA MMIC Ka 25 W 그림 3. Ka GaN DRA MMIC (V d = 20 V Fig. 3. S-parameter Characteristics of the Ka-band GaN DRA MMIC(V d =20 V. 그림 4. Ka GaN DRA MMIC (V d =20 V Fig. 4. Power characteristics of the Ka-band GaN DRA MMIC(V d =20 V., V d =20 V, GHz 26.3, 8.2, 8.3,, 36 m, 21, 24.2 %. 3 4 DRA MMIC. 3-2 GaN HPA MMIC HPA MMIC TriQuint 0.15 μm GaN, 8 50 μm (Load- 그림 5. Ka GaN HPA MMIC Fig. 5. Thermal analysis results of Ka-band HPA MMIC. pull, 31 m 8 40 m. (Wire Bonding (margin 39.5 m [2]., 50, HPA MMIC. MMIC CuW, 70, FEM(Finite Element Model GaN MTTF(Mean Time to Failure [3]. HPA MMIC,, V d =20 V 4, GHz 26, 8.2, 7.6, 38.7 m, 22.4 %, HPA MMIC, 7, 8 SS- PA HPA MMIC 4. HPA MMIC mm Micro-Strip Line to WR28 Transition 1085
4 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 26, no. 12, Dec 포화 전력 특성 회로도 (a (a Saturation power (a HPA MMIC (a HPA MMIC schematic 전력부가효율 특성 진 (b (b Power added efficiency (b HPA MMIC (b HPA MMIC photograph 회로도와 진 그림 6. Ka GaN HPA MMIC Fig. 6. Schematic and picture of the Ka-band GaN HPA MMIC. 전력이득 특성 산란계수 특성 그림 7. Ka GaN HPA MMIC (Vd =20 V Fig. 7. S-parameter characteristics of the Ka-band GaN HPA MMIC(Vd =20 V (c (c Power gain 전력 특성 그림 8. Ka GaN HPA MMIC (Vd =20 V Fig. 8. Power characteristics of the Ka-band GaN HPA MMIC(Vd =20 V. 본 논문에서 제작된 HPA MMIC는 MS(Micro-strip 전 송선으로 종단되어 있어 이를 WR28 규격의 도파관 전력
5 GaN HPA MMIC 변환기 진 (a MS-to-WR28 (a Photograph of MS-to-WR28 transition 기반 Ka 25 W 설계 및 제작 전력합성기 진 (a WR28 (a Photograph of WR28 power combiner 산란계수 특성 (b Back to back (b Back to back measurement results 변환기 진 및 특성 그림 9. MS to WR28 Fig. 9. Photograph and characteristics of MS-to-WR28 transition. 합성기와 결합하기 위해서는 MS-to-WR28의 변환기가 필 요하다. 또한, 의 결합성을 고려하여 일자형인 릿지 (ridge 구조로 설계 및 제작되었다. 그림 9는 제작된 변 환기 진과 백투백(Back to Back 측정 결과이다. 주파수 GHz 에서 전달계수 0.5, 입출력 정합 22 의 특성을 나타내어 1개의 삽입 손실은 0.25 로 판단되었다. [4] 3-4 WR28 Wave Guide Power Combiner 의 출력단의 전력합성을 위하여 4:1 WR28 인터 페이스를 가진 전력합성기를 설계 및 제작하였다. 또한, 출력단 격리도 향상을 위하여 저항체 격벽을 삽입하였다. 그림 10은 제작된 전력합성기와 그 특성을 도식한 그 림이다. 측정하지 않는 단자를 도파관으로 정합하여 단락 시키고, 회로망 분석기로 2-port 측정을 하였으며, 측정 결 과 주파수 GHz 에서 전달계수 약 6.3 가 측정되어 삽입손실 0.3, 입력 정합 13, 출력정합 23, 격리특성 20 의 특성을 나타내었다. [4] 전력합성기 산란계수 특성 (b WR28 (b W28 power combiner measurement results 전력 합성기 진 및 특성 그림 10. W28 Fig. 10. Photograph and characteristics of WR28 power combiner. 제작된 및 의 특성 표 1. DRA HPA MMIC Table 1. Characteristics of fabricated DRA and HPA MMICs. Unit DRA GHz HPA Frequency Psat m > 36 > 38.7 PAE % > 24.2 > 22.4 Pgain > 21 > Size mm 부품 특성 표 2. Table 2. Characteristics of component. Unit Transition Frequency GHz Combiner Insertion loss < 0.25 < 0.3 Input RL < Output RL < Isolation > 20 < < 1087
6 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 26, no. 12, Dec 표 1과 표 2는 제작된 MMIC와 의 부속품의 특성 을 정리한 표이다. Ⅳ. 제작 및 특성 평가 그림 11은 앞 절에서 고찰된 부품을 이용하여 제작된 Ka GaN 기반 의 진이며, 방열판을 제외한 의 크기는 mm 이다. 의 특성평가 는 소신호 분석과 대신호 분석으로 이루어졌다. 일반적으 로 는 온도가 올라가면 이득 특성이 떨어지는 특 3 의 전력 특성 그림 13. Ka (Vd =20 V Fig. 13. Power Characteristics of the Ka-band (Vd =20 V. 진 그림 11. Ka Fig. 11. Photograph of the Ka-band. 성이 있다. 따라서 소신호 평가는 상온에서 대신호 평가 는 섭씨 50도 조건에서 이루어졌으며, 측정에 용된 대 표적인 계측기는 Keysight의 PNAX 회로망 분석기와 N1912 전력 분석기를 이용하였다. 산란계수 측정결과, 주파수 GHz 에서 소신 호 이득 46.5, 입력정합 5.8 의 특성을 나타내었으 며, 대신호 측정 결과, 포화 출력 44.2 m, 전력부가효율 16.6 %, 전력이득 39.2 의 특성을 나타 내었다. 이때, 의 DC 공급 전압은 단일 전압 20 V를 인가하였다. Ⅴ. 결 초고주파 인 Ka 의 25 W급 를 제작하기 위하여 상용 0.15 μm GaN 공정을 이용 DRA 및 HPA MMIC를 설계 및 제작하여 특성 평가하였고 특히, 의 안정적인 고온동작을 확인하기 위하여 HPA MMIC의 열해석 시뮬레이션을 실시하였다. 열해석 시뮬레이션 결 과, HPA MMIC의 채널온도가 섭씨 193도로 나타나 MTTF 가 1 10 시간 이상임을 확인하였다. 또한, 의 주요 부속품인 MS-to-WR28 변환기 및 WR28 전력 합성기를 설계 및 제작, 평가하여 Ka GaN 기반 를 제작 하였다. 제작된 Ka GaN 기반 는 주파수 GHz 섭씨 50도에서 대신호 측정결과, 포화 출력 44.2 m, 전력부가효율 16.6 %, 전력이득 39.2 의 특 6 의 산란계수 특성 그림 12. Ka (Vd =20 V Fig. 12. S-parameter characteristics of the Ka-band (Vd =20 V 론
7 GaN HPA MMIC Ka 25 W 표 3. Ka Table 3. Characteristics of Ka-band. Unit Ka-band Test condition Frequency GHz P sat m > P AE % > Power gain > , Ka,. References [1],,,, " ",, 22 (3, pp. 3-16, [2] C. Y. Ng, et al, "A 20-watt Ka-band GaN high power amplifier MMIC", Microwave Conference(EuMC, th European, pp , Oct [3] F. Yamaki, et al, "Ruggedness and reliability of GaN HEMT", IEEE, EuMIC. pp , Oct [4] G. Zabra, et al, "An optimised waveguide to microstrip transition at K band", IEEE Microwave Conference, 26 th European, pp. 6-13, Sep [5] L. W. Epp, et al, "A high-power Ka-band(31 36 GHz solid-state amplifier based on low-loss corporate waveguide combining", Microwave Theory and Techniques, IEEE Trans., vol. 56. pp , Aug : ( : ( : ( : [ 주관심분야 ], HPA MMIC : ( : ( : [ 주관심분야 ] RF/Analog, HPA MMIC : ( : ( : ( : [ 주관심분야 ], HPA MMIC : ( : ( : ( : [ 주관심분야 ], / 1089
8 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 26, no. 12, Dec 염인 복 년 월 한양대학교 전자공학과 (공학 년 월 충남대학교 전자공학과 (공학 석 년 월 충남대학교 전자공학과 (공학 박 년 월 현재: 한국전자통신연구원 [주 관심분야] 위성통신 탑재체 시스템 : : : 서인 종 년 월 호남대학교 전파공학과 (공학 년 월 전남대학교 전자정보통신공 학과 공학석 년 월 전남대학교 전자정보통신공 학과 공학박 년 월 현재: (주에이스테크놀로 지 [주 관심분야] 안테나, 초고주파 회로 : : ( : ( 박형 진 년 2월: 고려대학교 전기전자전파공 학부 (공학 2005년 2월: 고려대학교 전파공학과 (공학 석 2014년 10월 현재: (주에이스테크놀로 지 [주 관심분야] 위성통신부품설계 조인 호 년 월 광주대학교 전자공학과 (공학 년 월 전남대학교 전자공학과 (공학 석 년 월 전남대학교 전자정보통신공 학과 공학박 년 월 현재: (주에이스테크놀로 지 [주 관심분야] 안테나, 초고주파 회로 : : : ( 남병 창 년 월 고려대학교 물리학과 (이학석 년 월 년 4월: (주케이엠더블 류 2001년 4월 2004년 4월: (주코스페이스 2004년 11월 현재: (주유텔 [주 관심분야] 레이더 송수신기 및 위성 : 통신 회로 공동 욱 년 년 석 년 년 월 경북대학교 전자공학과 (공학 월 경북대학교 전자공학과 (공학 월 년 월 주 텔레포스 월 현재 주 알에프코어 전력증폭기 : : : ( : ( [주 관심분야]
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 30(9),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2019 Sep.; 30(9), 712 717. http://dx.doi.org/10.5515/kjkiees.2019.30.9.712 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) MOS
More informationRRH 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. 2015 Mar.; 26(3), 276 282. http://dx.doi.org/10.5515/kjkiees.2015.26.3.276 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) RRH
More informationTHE 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. 2018 Oct.; 29(10), 799 804. http://dx.doi.org/10.5515/kjkiees.2018.29.10.799 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Method
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jun.; 27(6),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Jun.; 276), 504511. http://dx.doi.org/10.5515/kjkiees.2016.27.6.504 ISSN 1226-3133 Print)ISSN 2288-226X Online) Near-Field
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 28(3),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2017 Mar.; 28(3), 163 169. http://dx.doi.org/10.5515/kjkiees.2017.28.3.163 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) PCB
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jun.; 27(6),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Jun.; 27(6), 495 503. http://dx.doi.org/10.5515/kjkiees.2016.27.6.495 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Design
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Feb.; 29(2), IS
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Feb.; 29(2), 93 98. http://dx.doi.org/10.5515/kjkiees.2018.29.2.93 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) UHF-HF
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 26, no. 9, Sep GHz 10 W Doherty. [4]. Doherty. Doherty, C
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Sep.; 26(9), 783 789. http://dx.doi.org/10.5515/kjkiees.2015.26.9.783 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) GaN-HEMT
More information. 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. 2016 Feb.; 27(2), 170175. http://dx.doi.org/10.5515/kjkiees.2016.27.2.170 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Analysis
More information07 최운성.hwp
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2013 Nov.; 24(11), 1081 1090. http://dx.doi.org/10.5515/kjkiees.2013.24.11.1081 ISSN 1226-3133 (Print) ISSN 2288-226X (Online)
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jan.; 26(1),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Jan.; 26(1), 113118. http://dx.doi.org/10.5515/kjkiees.2015.26.1.113 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) A Retro-Directive
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Dec.; 27(12),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Dec.; 27(12), 1036 1043. http://dx.doi.org/10.5515/kjkiees.2016.27.12.1036 ISSN 1226-3133 (Print) ISSN 2288-226X (Online)
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 26(10),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Sep.; 26(10), 907 913. http://dx.doi.org/10.5515/kjkiees.2015.26.10.907 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Prediction
More informationPCB ACF 77 GHz. X,,.,. (dip brazing), (diffusion bonding), (electroforming),, [1],[2].. PCB(Printed Circuit Board), (anisotropic conductive film: ACF)
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Oct.; 29(10), 752 757. http://dx.doi.org/10.5515/kjkiees.2018.29.10.752 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) PCB
More information04 김영규.hwp
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 214 Nov.; 25(11), 1121 1127. http://dx.doi.org/1.5515/kjkiees.214.25.11.1121 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Planar
More informationTHE 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. 2015 Mar.; 26(3), 283 291. http://dx.doi.org/10.5515/kjkiees.2015.26.3.283 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Negative
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Oct.; 27(10),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Oct.; 27(10), 926 934. http://dx.doi.org/10.5515/kjkiees.2016.27.10.926 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Multi-Function
More information04 최진규.hwp
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Aug.; 26(8), 710717. http://dx.doi.org/10.5515/kjkiees.2015.26.8.710 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) RF ESPAR
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jul.; 27(7),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Jul.; 27(7), 625634. http://dx.doi.org/10.5515/kjkiees.2016.27.7.625 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Near-Field
More information<313920C0CCB1E2BFF82E687770>
韓 國 電 磁 波 學 會 論 文 誌 第 19 卷 第 8 號 2008 年 8 月 論 文 2008-19-8-19 K 대역 브릭형 능동 송수신 모듈의 설계 및 제작 A Design and Fabrication of the Brick Transmit/Receive Module for K Band 이 기 원 문 주 영 윤 상 원 Ki-Won Lee Ju-Young Moon
More information09 남형기.hwp
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2013 Sep.; 24(9), 936 943. http://dx.doi.org/10.5515/kjkiees.2013.24.9.936 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) 77
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 26(10),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Sep.; 26(10), 876 884. http://dx.doi.org/10.5515/kjkiees.2015.26.10.876 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Design
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 26(11),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Nov.; 26(11), 985991. http://dx.doi.org/10.5515/kjkiees.2015.26.11.985 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Analysis
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 6, Jun , [6]. E- [9],[10]. E- 3D EM(electromagnetic),,
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Jun.; 29(6), 401 406. http://dx.doi.org/10.5515/kjkiees.2018.29.6.401 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) E-
More information. /. / 2-way / Corporate, 2-way / /,. Corporate / 1/4, 6 18 GHz 3, Corporate. (a) Corporate (a) Corporate power combining structure (b) (b) Spatial po
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2017 Apr.; 28(4), 286 297. http://dx.doi.org/10.5515/kjkiees.2017.28.4.286 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Development
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 26(3),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 215 Mar.; 26(3), 248 256. http://dx.doi.org/1.5515/kjkiees.215.26.3.248 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Metal
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 10, Oct , EBG. [4],[5],. double split ring resonator (D
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Oct.; 29(10), 739 744. http://dx.doi.org/10.5515/kjkiees.2018.29.10.739 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) DSRR
More information04 박영주.hwp
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 216 Mar.; 27(3), 253 26. http://dx.doi.org/1.5515/kjkiees.216.27.3.253 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) LPDA Design
More information05 목차(페이지 1,2).hwp
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2014 Oct.; 25(10), 10771086. http://dx.doi.org/10.5515/kjkiees.2014.25.10.1077 ISSN 1226-3133 (Print)ISSN 2288-226X (Online)
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Oct.; 27(10),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Oct.; 27(10 892 899. http://dx.doi.org/10.5515/kjkiees.2016.27.10.892 ISSN 1226-3133 (Print ISSN 2288-226X (Online X- 50
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 26(11),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Nov.; 26(11), 978 984. http://dx.doi.org/10.5515/kjkiees.2015.26.11.978 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Transceiver
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jan.; 27(1), ISSN
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 216 Jan.; 27(1), 17. http://dx.doi.org/1.5515/kjkiees.216.27.1.1 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Switch 1.5 GHz
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 25(3),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2014 Mar.; 25(3), 304310. http://dx.doi.org/10.5515/kjkiees.2014.25.3.304 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Analysis
More information11 함범철.hwp
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2012 Aug.; 23(8), 958 966. http://dx.doi.org/10.5515/kjkiees.2012.23.8.958 ISSN 1226-3133 (Print) LTCC Bluetooth/WiFi A Bluetooth/WiFi
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 28, no. 1, Jan GaN MMIC(Monolithic Microwave Integrated Circui
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2017 Jan.; 28(1, 1 9. http://dx.doi.org/10.5515/kjkiees.2017.28.1.1 ISSN 1226-3133 (Print ISSN 2288-226X (Online ETRI 0.25 μm
More information24 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
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Oct.; 29(10), 758 765. http://dx.doi.org/10.5515/kjkiees.2018.29.10.758 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) 24
More information6 10 GHz InGaAs 0.15 μm 27 dbm GHz,, DAADetection And Avoid,. UWB. UWB 41.3 dbm/ MHz.,,, PRFPulse Repetition Frequency., UWB IC. UWB PA [1]
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Oct.; 2910, 766 772. http://dx.doi.org/10.5515/kjkiees.2018.29.10.766 ISSN 1226-3133 Print ISSN 2288-226X Online 6 10 GHz
More informationTHE 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. 2018 Jun.; 29(6), 457463. http://dx.doi.org/10.5515/kjkiees.2018.29.6.457 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Sigma-Delta
More information, V2N(Vehicle to Nomadic Device) [3]., [4],[5]., V2V(Vehicle to Vehicle) V2I (Vehicle to Infrastructure) IEEE 82.11p WAVE (Wireless Access in Vehicula
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 215 Jul.; 26(7), 66 612. http://dx.doi.org/1.5515/kjkiees.215.26.7.66 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Dual-Band
More informationSmall-Cell 2.6 GHz Doherty 표 1. Silicon LDMOS FET Table 1. Comparison of silicon LDMOS FET and GaN- HEMT. Silicon LDMOS FET Bandgap 1.1 ev 3.4 ev 75 V
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Feb.; 27(2), 108 114. http://dx.doi.org/10.5515/kjkiees.2016.27.2.108 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Small-Cell
More information<35335FBCDBC7D1C1A42DB8E2B8AEBDBAC5CDC0C720C0FCB1E2C0FB20C6AFBCBA20BAD0BCAE2E687770>
Journal of the Korea Academia-Industrial cooperation Society Vol. 15, No. 2 pp. 1051-1058, 2014 http://dx.doi.org/10.5762/kais.2014.15.2.1051 멤리스터의 전기적 특성 분석을 위한 PSPICE 회로 해석 김부강 1, 박호종 2, 박용수 3, 송한정 1*
More information(JBE Vol. 21, No. 1, January 2016) (Regular Paper) 21 1, (JBE Vol. 21, No. 1, January 2016) ISSN 228
(JBE Vol. 1, No. 1, January 016) (Regular Paper) 1 1, 016 1 (JBE Vol. 1, No. 1, January 016) http://dx.doi.org/10.5909/jbe.016.1.1.60 ISSN 87-9137 (Online) ISSN 16-7953 (Print) a), a) An Efficient Method
More information03 장태헌.hwp
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2013 Aug.; 24(8), 772 780. http://dx.doi.org/10.5515/kjkiees.2013.24.8.772 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) HEMP
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jul.; 27(7),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 16 Jul.; 27(7), 64662. http://dx.doi.org/./kjkiees.16.27.7.646 ISSN 1226-3133 (Print)ISSN 2288-226 (Online) 2D Microwave Image
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Aug.; 27(8),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Aug.; 27(8), 709 716. http://dx.doi.org/10.5515/kjkiees.2016.27.8.709 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Development
More informationPowerPoint Presentation
신호조절 (Signal Conditioning) 메카트로닉스 시스템의 구성 ECU 인터페이스 회로 (시그널 컨디셔닝) 마이컴 Model of 기계 시스템 인터페이스 회로 (드라이빙 회로) 센서 액츄에이터 (구동기) 기계 시스템 PN 접합 다이오드 [1] 다이오드의 DC 해석과 등가모델 [1] 다이오드의 DC 해석과 등가모델 [1] 다이오드 응용회로 [1] 다이오드
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Oct.; 27(10),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Oct.; 27(10), 935 940. http://dx.doi.org/10.5515/kjkiees.2016.27.10.935 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Directed
More information09권오설_ok.hwp
(JBE Vol. 19, No. 5, September 2014) (Regular Paper) 19 5, 2014 9 (JBE Vol. 19, No. 5, September 2014) http://dx.doi.org/10.5909/jbe.2014.19.5.656 ISSN 2287-9137 (Online) ISSN 1226-7953 (Print) a) Reduction
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Dec.; 26(12),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Dec.; 26(12), 1044 1049. http://dx.doi.org/10.5515/kjkiees.2015.26.12.1044 ISSN 1226-3133 (Print) ISSN 2288-226X (Online)
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jan.; 26(1), IS
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Jan.; 26(1), 54 62. http://dx.doi.org/10.5515/kjkiees.2015.26.1.54 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Design
More informationDBPIA-NURIMEDIA
박건수 *, 서태영 **, 김종욱 *** ". 요약 Abstract The induction melting furnace using electric generator has been introduced since 1920s, and it began to be widely applied to industrial applications due to increasing
More informationDBPIA-NURIMEDIA
한국소음진동공학회 2015추계학술대회논문집년 Study of Noise Pattern and Psycho-acoustics Characteristic of Household Refrigerator * * ** ** Kyung-Soo Kong, Dae-Sik Shin, Weui-Bong Jeong, Tae-Hoon Kim and Se-Jin Ahn Key Words
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Aug.; 30(8),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2019 Aug.; 30(8), 629639. http://dx.doi.org/10.5515/kjkiees.2019.30.8.629 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Analysis
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 30(3),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2019 Mar.; 30(3), 223 228. http://dx.doi.org/10.5515/kjkiees.2019.30.3.223 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Analysis
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 28, no. 4, Apr (planar resonator) (radiator) [2] [4].., (cond
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2017 Apr.; 28(4), 279 285. http://dx.doi.org/10.5515/kjkiees.2017.28.4.279 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) A Study
More information05 목차(페이지 1,2).hwp
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2014 Sep.; 25(9), 944 951. http://dx.doi.org/10.5515/kjkiees.2014.25.9.944 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) A Study
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 28, no. 9, Sep [1]. RFID.,,,,,,, /,,, (,,,, ) [2] [4].., ( 99
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2017 Sep.; 28(9), 679 684. http://dx.doi.org/10.5515/kjkiees.2017.28.9.679 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) UHF
More informationDBPIA-NURIMEDIA
韓國電磁波學會論文誌第 21 卷第 12 號 2010 年 12 月論文 2010-21-12-09 Dual-Band Compact Broad Band-Pass Filter with Parallel Coupled Line 최영구 윤기철 이정훈 홍태의 Young-Gu ChoiBhanu Shrestha*Ki-Cheol Yn**Jeong-Hun Lee** Tae-Ui Hong***
More informationDBPIA-NURIMEDIA
The e-business Studies Volume 17, Number 6, December, 30, 2016:275~289 Received: 2016/12/02, Accepted: 2016/12/22 Revised: 2016/12/20, Published: 2016/12/30 [ABSTRACT] SNS is used in various fields. Although
More informationTHE 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. 2016 Aug.; 27(8), 693700. http://dx.doi.org/10.5515/kjkiees.2016.27.8.693 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Design
More information<313630313032C6AFC1FD28B1C7C7F5C1DF292E687770>
양성자가속기연구센터 양성자가속기 개발 및 운영현황 DOI: 10.3938/PhiT.25.001 권혁중 김한성 Development and Operational Status of the Proton Linear Accelerator at the KOMAC Hyeok-Jung KWON and Han-Sung KIM A 100-MeV proton linear accelerator
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Dec.; 26(12),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Dec.; 26(12), 1100 1107. http://dx.doi.org/10.5515/kjkiees.2015.26.12.1100 ISSN 1226-3133 (Print) ISSN 2288-226X (Online)
More informationDBPIA-NURIMEDIA
The e-business Studies Volume 17, Number 6, December, 30, 2016:3~20 Received: 2016/12/04, Accepted: 2016/12/27 Revised: 2016/12/27, Published: 2016/12/30 [ABSTRACT] This study aims to comprehensively analyze
More information08 조영아.hwp
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Jan.; 26(1), 6370. http://dx.doi.org/10.5515/kjkiees.2015.26.1.63 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) 900 MHz
More information박선영무선충전-내지
2013 Wireless Charge and NFC Technology Trend and Market Analysis 05 13 19 29 35 45 55 63 67 06 07 08 09 10 11 14 15 16 17 20 21 22 23 24 25 26 27 28 29 30 31 32 33 36 37 38 39 40
More informationDBPIA-NURIMEDIA
The e-business Studies Volume 17, Number 6, December, 30, 2016:237~251 Received: 2016/11/20, Accepted: 2016/12/24 Revised: 2016/12/21, Published: 2016/12/30 [ABSTRACT] Recently, there is an increasing
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Feb.; 26(2),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 15 Feb.; (), 1. http://dx.doi.org/1.5515/kjkiees.15... ISSN 1-3133 (Print)ISSN -X (Online) An Analysis on Harmonic Effects of
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Apr.; 26(4),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Apr.; 26(4), 357 364. http://dx.doi.org/10.5515/kjkiees.2015.26.4.357 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) 6 MIMO
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 26, no. 9, Sep [1],[2].,.,, [3],[4]., 4 MI- MO(Multiple Input
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Sep.; 26(9), 769 776. http://dx.doi.org/10.5515/kjkiees.2015.26.9.769 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) MIMO
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jan.; 25(1), IS
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2014 Jan.; 25(1), 47 52. http://dx.doi.org/10.5515/kjkiees.2014.25.1.47 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Circuit
More information10(3)-09.fm
w y wz 10«3y 253~258 (2010.12.) Journal of Korean Society of Urban Environment ³ w Á» Á Á y w y œw (2010 11 22, 2010 12 9 k) Study on Determine of Detention Pond in Small Developed Area In-Soo Chang ½
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 28(11),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2017 Nov.; 28(11), 837 842. http://dx.doi.org/10.5515/kjkiees.2017.28.11.837 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) 8PSK-TCM
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 27(9),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Sep.; 27(9), 775 782. http://dx.doi.org/10.5515/kjkiees.2016.27.9.775 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) GPS
More information1 Nov-03 CST MICROWAVE STUDIO Microstrip Parameter sweeping Tutorial Computer Simulation Technology
1 CST MICROWAVE STUDIO Microstrip Parameter sweeping Tutorial Computer Simulation Technology wwwcstcom wwwcst-koreacokr 2 1 Create a new project 2 Model the structure 3 Define the Port 4 Define the Frequency
More informationDBPIA-NURIMEDIA
김영민 *, 정용선 *, 노재우 *, 장리검 *, 안병철 ** 요약 Abstract This paper presents a broadband orthomode transducer (OMT) operating at 7-87GHz. The proposed OMT consists of a T-shaped bifurcation structure, a polarization
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Feb.; 28(2),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2017 Feb.; 28(2), 129138. http://dx.doi.org/10.5515/kjkiees.2017.28.2.129 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) PT- Doppler
More information<37305FB1E8B1D4C8AF2DC3CAB0EDC1D6C6C4BFEB20BCB1C7FC20C0CCB5E628C7D1B1DBBACEBAD020BFB5B9AEBCF6C1A4292E687770>
Journal of the Korea Academia-Industrial cooperation Society Vol. 17, No. 11 pp. 635-639, 2016 http://dx.doi.org/10.5762/kais.2016.17.11.635 ISSN 1975-4701 / eissn 2288-4688 김규환한화시스템 Design and Implementation
More information09È«¼®¿µ5~152s
Korean Journal of Remote Sensing, Vol.23, No.2, 2007, pp.45~52 Measurement of Backscattering Coefficients of Rice Canopy Using a Ground Polarimetric Scatterometer System Suk-Young Hong*, Jin-Young Hong**,
More informationDBPIA-NURIMEDIA
The e-business Studies Volume 17, Number 4, August, 30, 2016:319~332 Received: 2016/07/28, Accepted: 2016/08/28 Revised: 2016/08/27, Published: 2016/08/30 [ABSTRACT] This paper examined what determina
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE May; 29(5),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 May; 29(5), 325 335. http://dx.doi.org/10.5515/kjkiees.2018.29.5.325 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Development
More information저작자표시 - 비영리 - 변경금지 2.0 대한민국 이용자는아래의조건을따르는경우에한하여자유롭게 이저작물을복제, 배포, 전송, 전시, 공연및방송할수있습니다. 다음과같은조건을따라야합니다 : 저작자표시. 귀하는원저작자를표시하여야합니다. 비영리. 귀하는이저작물을영리목적으로이용할
저작자표시 - 비영리 - 변경금지 2.0 대한민국 이용자는아래의조건을따르는경우에한하여자유롭게 이저작물을복제, 배포, 전송, 전시, 공연및방송할수있습니다. 다음과같은조건을따라야합니다 : 저작자표시. 귀하는원저작자를표시하여야합니다. 비영리. 귀하는이저작물을영리목적으로이용할수없습니다. 변경금지. 귀하는이저작물을개작, 변형또는가공할수없습니다. 귀하는, 이저작물의재이용이나배포의경우,
More information*금안1512-01-도비라및목차1~9
ISSN 1975-667 215. 12 215. 12 6 5 4 3 2 1 6 5 4 3 2 1 3 145 14 135 13 13 143. 14.7 1.4 9.2 1 7 45 4 35 41.4 85 76.9 76.8 3 7 8 75 125 4 4 1 25 8 6 4 2 2 15 1 5 15 15 36 35.3 36 14 13 12 11 14
More information<30312DC1A4BAB8C5EBBDC5C7E0C1A4B9D7C1A4C3A52DC1A4BFB5C3B62E687770>
Journal of the Korea Institute of Information and Communication Engineering 한국정보통신학회논문지(J. Korea Inst. Inf. Commun. Eng.) Vol. 19, No. 2 : 258~264 Feb. 2015 ID3 알고리즘 기반의 귀납적 추론을 활용한 모바일 OS의 성공과 실패에 대한
More information07변성우_ok.hwp
2 : (Regular Paper) 19 5, 2014 9 (JBE Vol. 19, No. 5, September 2014) http://dx.doi.org/10.5909/jbe.2014.19.5.631 ISSN 2287-9137 (Online) ISSN 1226-7953 (Print) a), a), b) Metadata Management System Implementation
More information*금안14(10)01-도비라및목차1~12
ISSN 1975-667 21. 1 21. 1 3 1 8 6 2 1 8 6 2 15 1 13 12 11 1 15 12 9 6 3 36 32 28 2 75 85 83 81 79 77 5 1 8 6 1 8 6 1 8 25 2 2 2 6 15 1 2-2 5-5 3 2 3 2 1 1-1 -1-2 -2 6 1 13 12 1 8 6 16 12 2.
More information디지털포렌식학회 논문양식
ISSN : 1976-5304 http://www.kdfs.or.kr Virtual Online Game(VOG) 환경에서의 디지털 증거수집 방법 연구 이 흥 복, 정 관 모, 김 선 영 * 대전지방경찰청 Evidence Collection Process According to the Way VOG Configuration Heung-Bok Lee, Kwan-Mo
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jun.; 29(6),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Jun.; 29(6), 415423. http://dx.doi.org/10.5515/kjkiees.2018.29.6.415 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Analysis
More informationPCB PCB. PCB P/G de-cap [2],[3]., de-cap ESL(Equivalent Series Inductance) [3],. P/G [4], P/G. de-cap P/G, PCB.. 단일비아를이용한 P/G 면공진상쇄 2-1 P/G 면공진현상 PCB
韓國電磁波學會論文誌第 20 卷第 12 號 2009 年 12 月論文 2009-20-12-05 PCB Improved Characteristic of Radiated Emission of a PCB b Using the Via-Hole Position 김리진 이재현 Li-Jin Kim Jae-Hun Lee 요약 4 PCB(Printed Circuit Boards)
More informationMicrosoft PowerPoint - ICCAD_Analog_lec01.ppt [호환 모드]
Chapter 1. Hspice IC CAD 실험 Analog part 1 Digital circuit design 2 Layout? MOSFET! Symbol Layout Physical structure 3 Digital circuit design Verilog 를이용한 coding 및 function 확인 Computer 가알아서해주는 gate level
More information실험 5
실험. OP Amp 의기초회로 Inverting Amplifier OP amp 를이용한아래와같은 inverting amplifier 회로를고려해본다. ( 그림 ) Inverting amplifier 위의회로에서 OP amp의 입력단자는 + 입력단자와동일한그라운드전압, 즉 0V를유지한다. 또한 OP amp 입력단자로흘러들어가는전류는 0 이므로, 저항에흐르는전류는다음과같다.
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 27, no. 12, Dec 그러나 eloran 송신 안테나는 매우 넓은 영역을 차지한 다. 예를 들어 미국에
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Dec.; 27(12), 1053 1058. http://dx.doi.org/10.5515/kjkiees.2016.27.12.1053 ISSN 1226-3133 (Print) ISSN 2288-226X (Online)
More information03-서연옥.hwp
농업생명과학연구 49(4) pp.31-37 Journal of Agriculture & Life Science 49(4) pp.31-37 Print ISSN 1598-5504 Online ISSN 2383-8272 http://dx.doi.org/10.14397/jals.2015.49.4.31 국가산림자원조사 자료를 적용한 충남지역 사유림경영율 추정 서연옥
More information,, RFID,. ITU-R [7], IoT (Internet of Thing), (ultra reliable) (low latency). IoT ( ) , [1]., [8] 10 IoT.,. Ofcom [10] IoT/M2M, (utilities),,
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Jul.; 27(7), 588598. http://dx.doi.org/10.5515/kjkiees.2016.27.7.588 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) A Promoting
More informationDBPIA-NURIMEDIA
초고주파대역도파관부품측정기술 Measurement Techniques for Microwave Waveguide Components 저자 (Authors) 유상길, 최순우, 김동현, 김대오, 안병철 Sang-Gil Yu, Swoon-Woo Choi, Dong-Hyun Kim, Dae-Oh, Kim, Bierng-Chearl Ahn 출처 (Source) 한국정보기술학회논문지
More informationexp
exp exp exp exp exp exp exp exp exp exp exp log 第 卷 第 號 39 4 2011 4 투영법을 이용한 터빈 블레이드의 크리프 특성 분석 329 성을 평가하였다 이를 위해 결정계수값인 값 을 비교하였으며 크리프 시험 결과를 곡선 접합 한 결과와 비선형 최소자승법으로 예측한 결과 사 이 결정계수간 정도의 오차가 발생하였고
More information인문사회과학기술융합학회
Vol.5, No.5, October (2015), pp.471-479 http://dx.doi.org/10.14257/ajmahs.2015.10.50 스마트온실을 위한 가상 외부기상측정시스템 개발 한새론 1), 이재수 2), 홍영기 3), 김국환 4), 김성기 5), 김상철 6) Development of Virtual Ambient Weather Measurement
More information08김현휘_ok.hwp
(Regular Paper) 21 3, 2016 5 (JBE Vol. 21, No. 3, May 2016) http://dx.doi.org/10.5909/jbe.2016.21.3.369 ISSN 2287-9137 (Online) ISSN 1226-7953 (Print) a), a) An Audio Coding Technique Employing the Inter-channel
More informationTHE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 25(11),
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2014 Nov.; 25(11), 11281134. http://dx.doi.org/10.5515/kjkiees.2014.25.11.1128 ISSN 1226-3133 (Print)ISSN 2288-226X (Online)
More informationLumbar spine
Lumbar spine CT 32 111 DOI : 10.3831/KPI.2010.13.2.111 Lumbar Spine CT 32 Received : 10. 05. 23 Revised : 10. 06. 04 Accepted : 10. 06. 11 Key Words: Disc herniation, CT scan, Clinical analysis The Clinical
More information