Conferences

• International Conferences

[62] IVEC 2025 (oral): Mincheol Kim, Jaeun Park, Joohyung Han, Soon-yong Kwon, and EunMi Choi, "Field emission enhancement in MXene cold cathodes through porous structural design" (April 14-17, 2025 @ Netherlands)

[61] IVEC 2025 (oral): JinHo Lim, Taekyu Han, and EunMi Choi, "Experimental evaluation of beam characteristics in a dual-frequency kW-class gyrotron cavity" (April 14-17, 2025 @ Netherlands)

[60] IVEC 2025 (oral): JaeGyeong Shin, Jungtak Kim, Younghoon Hung, Hyoil Kim, and EunMi Choi, "HE11 mode-based wireless communication for a hyperloop system using a dielectric-lined waveguide" (April 14-17, 2025 @ Netherlands)

[59] iFPC 2025 (poster): JinHo Lim, JaeGeong Shin, and EunMi Choi, "Dual-frequency gyrotron at 142 & 208 GHz: Design and experiment" (June 9-13, 2025)

[58] IW-FIRT 2024 (Invited talk) : E.M. Choi "Introduction to Recent Effort in Development of Dual Frequency THz Gyrotron" (Oct. 16-18, 2024)

[57] 2024 GSMM (oral) : SeokJu Moon, DongHo Yu, and EunMi Choi "Determination of Orbital Angular Momentum Modes With Double Slit Experiments in W-band" (May 20-22, 2024)

[56] 2024 GSMM (oral) : Edrick Baijukya, and EunMi Choi "Feature Extraction for Machine Learning Based Alignment of W-band Higher-Order Mode Generator" (May 20-22, 2024)

[55] 2024 GSMM (oral) : Junyoung Lee, Wonjin Choi, Yoonseon Choi, and EunMi Choi "Design and Analysis of Staggered Double Vane Structure with Bragg Resonators for 200 GHz TWT" (May 20-22, 2024)

[54] 2024 EC22 (poster) : JinHo Lim, Wonjin Choi, Taegyu Han, and EunMi Choi "Low-power validation of dual frequency gyrotron mode converter launcher" (Apr 22-26, 2024)

[53] 2024 EC22 (poster) : JinHo Lim and EunMi Choi "Study on a higher order mode generation in a coaxial cavity at dual frequencies of 142 GHz & 208 GHz" (Apr 22-26, 2024)

[52] 2024 EC22 (poster) : TaeGyu Han, Hong Eun Choi, Wonjin Choi, Jinho Lim, and EunMi Choi "Development of a dual-frequency gyrotron operating at 142&208 GHz" (Apr 22-26, 2024)

[51] 2024 EC22 (poster) : Edrick Baijukya, JinHo Lim, and EunMi Choi "Application of Deep Learning for Alignment of Higher Order Mode Generators for Gyrotrons" (Apr 22-26, 2024)

[50] ICOPS2023 (Plenary talk) : EunMi Choi "High Power Terahertz Sources: New Applications and Challenges" (May 23, 2023)

[49] 2022 GSMM (oral) : Hong Eun Choi, EunMi Choi "Complex permittivity measurement using the TE01 mode in the cylindrical waveguide" (May 18-20, 2022)

[48] 2022 IVEC (poster) : Hong Eun Choi, Wonjin Choi, EunMi Choi "Development of components of multi-beam based E-band TWT" (2022.04.25 ~2022.04.29)

[47] 2022 EAPPC (poster) : Hong Eun Choi, TaeGyu Han, Daesik Kium, Jongwon Lee, EunMi Choi "Experimental analysis of third harmonic signal from Graphene-based metastructure with W-band Gyrotron" (2022.09.18~2022.09.22)

[46] 2022 EAPPC (poster) : TaeGyu Han, Ashwini Sawant, and EunMi Choi "Evaluation of the output beam characteristics of W-band short pulse gyrotron" (2022.09.18~2022.09.22)

[45] IVEC 2022 (poster) : Seokju Moon, JinHo Lim and EunMi Choi "Study of OAM Mode Identification by Electric Field Intensity Measurements at E-band" (2022.04.25 ~2022.04.29)

[44] GSMM2022 (poster) : TaeGyu Han, JinHo Lim, and EunMi Choi "Development of Higher order rotating-mode generator using dielectric rod waveguide at W-band" (May 18-20, 2022)

[43] GSMM2022 (poster) : Wonjin Choi and EunMi Choi "Simulation of Electron Beams With Nonuniform Particle Density for Traveling-Wave Tubes in Emittance-Dominated Regime" (May 18-20, 2022)

[42] IVEC 2022 (Oral) : TaeGyu Han, JinHo Lim, and EunMi Choi "Higher Order Mode Generator Direct-coupled with a Dielectric Rod Waveguide at W-band" (2022.04.25 ~ 2022.04.29)

[41] IVEC2021 (Oral) : Ingeun Lee, Ashwini Sawant, Seok Ju Moon, and EunMi Choi "System design of orbital angular momentum transmitter using dual-beam traveling wave tube amplifier" (2021)

[40] IVEC 2021 (poster) : Wonjin Choi, Ingeun Lee, Jinwoo Shin, and EunMi Choi "Design and Experiment of a 300 GHz Folded Waveguide Traveling-Wave Tube" (2021)

[39] ICOPS2020, virtual : Hong Eun Choi, and Eunmi Choi "The measurement of permittivity using TE01 mode in a cylindrical waveguide beyond 300GHz frequency band" (2020. 12. 06 - 2020. 12. 10)

[38] IVEC2019, Busan, South Korea : Mun Seok Choe, Ashwini Sawant, Ingeun Lee, Taegyu Han, Wonjin Choi, and EunMi Choi "A Study of Pulse Control of Millimeter-wave Gyrotron using High Density Plasma" (2019.04.28 - 2019.05.01)

[37] IVEC2019, Busan, South Korea : Wonjin Choi, Ingeun Lee, and EunMi Choi "Design Study of Two-Plane Focusing Periodically Cusped Magnets for a 300 GHz Sheet Beam Traveling-Wave Tube" (2019.04.28 - 2019.05.01)

[36] ICOPS2019, Orlando, US : Mun Seok Choe, Ashwini Sawant, Ingeun Lee, Wonjin Choi, Hong Eun Choi, Taegyu Han, and EunMi Choi "The Experimental Study of Time Resolved Inductively Coupled Plasma for Fast Contol of High Power Millimeter-wave" (2019.06.24 - 2019.06.29)

[35] ICOPS2019, Orlando, US : Wonjin Choi, Ingeun Lee, Jinwoo Shin, and EunMi Choi "Study of Electron Optics System for a 300 GHz Sheet Electron Beam Traveling-Wave Tube" (2019.06.24 - 2019.06.29)

[34] ICOPS2019, Orlando, USA : Ingeun Lee, Wonjin Choi, Ashwini Sawant, Mun Seok Choe, Jinwoo Shin, and EunMi Choi "Experimental Performance Evaluation of a 272 GHz Energy-Recirculating Folded Waveguide Traveling-Wave Tube Oscillator" (2019.06.23-06.28)

[33] IVEC2019, Busan, South Korea : Ingeun Lee, Wonjin Choi, Ashwini Sawant, Mun Seok Choe, Jinwoo Shin, and EunMi Choi "System Development and Performance Evaluation of a 0.272 THz Pulsed Folded Waveguide Traveling Wave Tube Oscillator" (2019.04.29-05.01)

[32] IVEC 2019, Busan : Hong Eun Choi, Wonjin Choi, Mun Seok Choe, Evgenya Simakov, Bruce Carlsten, Muhammed Zuboraj, and Eun Mi Choi "The dielectric constant measurement using a TE01 mode in W-band" (2019)

[31] IVEC 2019, Busan : Ashwini Sawant, Ingeun Lee and EunMi Choi "Development of the Second Harmonic Dual Mode Gyrotron for OAM Beam Generation" (29 April-01 May, 2019)

[30] EPJ Web of Conferences, Vol. 149, EDP Sciences, 2017. : M. Thumm, A. Sawant, M. S. Choe and E. M. Choi "The gyrotron–a natural source of high-power orbital angular momentum millimeter-wave beams." (17-22 July 2017)

[29] 10th International Workshop “Strong Microwaves and Terahertz Waves: Sources and Applications”, Russia : M Thumm, A. Sawant, M.S. Choe and E.M. Choi "The gyrotron–a natural source of high-power orbital angular momentum millimeter-wave beams" (17-22 July, 2017)

[28] IRMMW-THz 2017, Cancun, Mexixo : Ashwini Sawant, Mun Seok Choe, Manfred Thumm and EunMi Choi "Orbital angular momentum of gyrotron modes" (27 Aug.-1 Sept. 2017)

[27] IVEC 2017, London : Ashwini Sawant, Dongho Yu, Dongsung Kim, Mun Seok Choe, and EunMi Choi "Phase Retrieval of High-Power Gyrotron Orbital Angular Momentum Beams" (24-26 april, 2017)

[26] EPJ Web Conf. 2017 : Mun Seok Choe, Ashwini Sawant and EunMi Choi "The Experimental Verification of Gaussian Beam Coupling for ECH Transmission Line at 400GHz" (24 July 2017 [DOI: https://doi.org/10.1051/epjconf/201714704009])

[25] EPJ Web Conf. : Ashwini Sawant, Mun Seok Choe and EunMi Choi "Proposal of Mode Selection Criterian for Advanced KDEMO Gyrotron" (24 July 2017, [DOI: https://doi.org/10.1051/epjconf/201714704008])

[24] IVEC 2017, London, United Kingdom : Wonjin Choi, Ingeun Lee, EunMi Choi "Design and nano-CNC fabrication of modified sine waveguide for 300 GHz traveling-wave tube" (April 24-26, 2017)

[23] APS-DPP 2016, San Jose, CA, USA : Dongsung Kim, Dongho Yu, Ashwini Sawant, Mun Seok Choe, Ingeun Lee, and EunMi Choi "Experimental Verification on Remote Detectability of Concealed Radioactive Material Based on the Plasma Discharge Delay Time using High-Power Millimeter-Wave" (OCt. 31- Nov.4, 2016)

[22] IVESC 2016, Seoul, Korea : Ingeun Lee, Ashwini Sawant, and EunMi Choi "Design Study of Y-band Folded Waveguide Backward Wave Oscillator as Input Driver for Traveling Wave Tube Amplifier" (Oct. 18 - 20, 2016)

[21] URSI AP-RASC 2016, Seoul, Korea : Ingeun Lee, Ashwini Sawant, and EunMi Choi. "Design study of a G-band Folded Waveguide Traveling-Wave Tube driven by a Backward-Wave Oscillator" (Aug. 21-25, 2016)

[20] IVEC 2016, Monterey, CA, USA : Inguen Lee, Ashwini Sawant, JoonHo So, Youngjun Hong, and EunMi Choi "Design study of an Energy-Recirculating G-band Self-Driving Folded Waveguide Traveling-Wave Tube" (Apr. 19-21, 2016)

[19] IVESC 2016, Seoul, Korea : Wonjin Choi, Ingeun Lee, EunMi Choi "Design of Elliptical Sheet-Beam Electron Gun for 300 GHz Sine Waveguide Traveling-Wave Tube" (Oct. 18-20, 2016)

[18] IVEC 2016, Monterey, California, USA : Ashwini Sawant and EunMi Choi, "Dual Band Operation of a Photonic Band Gap Cavity for 400 GHz Gyrotron" (19-21 April, 2016)

[17] EC-19, 19th Joint workshop on ECE and ECRH, Gandhinagar, INDIA, 2016 : : Mun Seok Choe, Ashwini Sawant and EunMi Choi "The Experimental Verification of Gaussian Beam Coupling for ECH Transmission Line at 400GHz" (April 04-07, 2016)

[16] EC-19, 19th Joint workshop on ECE and ECRH, Gandhinagar, INDIA, 2016 : Ashwini Sawant, Mun Seok Choe and EunMi Choi "Proposal of Mode Selection Criterian for advanced KDEMO" (April 04-07, 2016)

[15] IRMMW-THz 2015, Hong Kong : M. S. Choe, K. S. Lee, N. E. Yu, and E. M. Choi* "The experimental results of fast switching system for millimeter wave transmission using photo-excited semiconductor" (2015)

[14] IRMMW-THz 2015, Hong Kong : I. Lee, M. S. Choe, D. J. Lee, and E. M. Choi* "Excellent photonic-assisted measurement system for high order mode pattern scan in reactive near field" (2015)

[13] IRMMW-THz 2015, Hong Kong : S. G. Kim, D. S. Kim, and E. M. Choi* "A novel method for power measurement of a short pulse gyrotron using Friis transmission formula at W-band" (2015)

[12] IVEC 2014, California, USA : I. G. Lee, M. S. Choe, D. J. Lee, E. M. Choi "Precise Measurement of Field patterns from a TE02 Mode Converter Using the Electro-Optic Probe Scanning system" (2014)

[11] IRMMW 2014, Tuscon, USA : A. Sawant, J. H. Kim, Y. Hong, J. H. So, and E. M. Choi "Comparative Study on PIC Simulations of the Gyrotron Cavity" (2014)

[10] GSMM 2014, Seoul, South Korea : K. H. Kim, M. S. Choe, W. Lee, J. H. So, and E. M. Choi "Estimation of Field Pattern from an Open Cavity Structure in Millimeter-wave Regime by Back-Propagated Algorithm" (2014)

[9] IVEC 2014, California, USA : S. G. Kim, D. S. Kim, M. S. Choe, J. H. So, and E. M. Choi "Feasibility Study on Performance Test of a Quasi-Optical Mode Converter Using a Linear, Simple Higher Order Mode Generator" (2014)

[8] GSMM 2014, Seoul, South Korea : I. G. Lee, D. J. Lee, E. M. Choi "Extream Near-Field Mode Pattern Scan for a TE02 Mode Converter Using the Electro-Optic Probe System" (2014)

[7] IVEC 2013, Paris, France : I. G. Lee, S. G. Kim, J. H. So, and E. M. Choi* "Design study of MIG for dual-band gyrotron" (2013)

[6] IVEC 2013, Paris, France : S. G. Kim, J. H. So, and E. M. Choi* "Design study and test of a mode converter for a 0.4 THz, 100 kW gyrotrron oscillator," (2013)

[5] IRMMW-THz 2012, Wollongong, Australia : D. S. Kim, W. S. Lee, J. H. So, and E. M. Choi* "Study on free electrons generated by concealed radioactive materials under controlled gaseous environment" (2012)

[4] IRMMW-THz 2012, Wollongong, Australia : S. G. Kim, J. R. Sirigiri, W. S. Lee, J. H. So, and E. M. Choi* "Design study of critical components of second harmonic a 100 kW, 0.4 THz gyrotron oscillator" (2012)

[3] International Photonics and Optoelectronics Meetings 2012, Wuhan, China : Invited talk: E. M. Choi, D. S. Kim, K. H. Kim, M. S. Choe, I. G. Lee, W. S. Lee, and J. H. So, "Sensing a radioactive material remotely using a high power THz gyrotron" (2012)

[2] IRMMW-THz 2011, Houston, USA : E. M. Choi, S. G. Kim, J. R. Sirigiri, W. S. Lee, and J. H. So "Design study on a MIG electron gun of a 0.4 THz, 100 kW gyrotron oscillator" (2011)

[1] IVEC 2011, Bangalore, India : E. M. Choi, S. G. Kim, J. R. Sirigiri, W. S. Lee, and J. H. So "Design study of a 0.4 THz, 100 kW pulsed gyrotron" (2011)

• Domestic Conferences

[72] 2025 한국전자파학회 동계학술대회 (포스터): 이준엽, 김민철, 최은미 "마이크로 플라즈마 생성을 위한 2D photonic crystal 기반 공진 구조 연구" (Feb 12-15, 2025)

[71] 2025 한국전자파학회 동계학술대회 (포스터): 문석주, 정재훈, 김영담, 최은미 "OAM mode propagation with infinitesimal dipole modeling in millimeter-wave regime" (Feb 12-15, 2025)

[70] 2025 한국전자파학회 동계학술대회 (포스터): 신재경, 정영훈, 김효일, 최은미 "굽힘 도파관 커플링 이론을 통한 하이퍼루프 통신 해석 연구" (Feb 12-15, 2025)

[69] 2025 한국전자파학회 동계학술대회 (포스터): 임진호, 최은미 "주름진 사각 도파관을 통한 모드 전파 및 제어 특성에 대한 연구" (Feb 12-15, 2025)

[68] 2025 한국전자파학회 동계학술대회 (구두): 김민철, 박재은, 한주형, 권순용, 최은미 "MXene 시트의 전자기 차폐 성능 - X-band 에서의 실험적 분석" (Feb 12-15, 2025)

[67] 2023 한국전자파학회 하계종합학술대회 (구두) : 최홍은, 최은미 "밀리미터파 대역에서의 유전손실이 높은 물질을 위한 새로운 유전율 측정 방법" (Aug 23-26, 2023)

[66] 2023 한국전자파학회 하계종합학술대회 (구두) : V Venkata Reddy, Wonjin Choi, and EunMi Choi "Performance Evaluation of a Diode-Type Carbon Nanotube Field Emitter with Inverse T-Type Cathode Configuration" (Aug 23-26, 2023)

[65] 2023 한국전자파학회 하계종합학술대회 (포스터) : 김민철, 최홍은, 최윤선, 최은미 "초고주파 대역의 FWTWT에 대한 허용 공차와 3D 프린팅 기술을 이용한 제작 가능 여부에 대한 조사" (Aug 23-26, 2023)

[64] 2023 한국전자파학회 하계종합학술대회 (포스터) : 이주녕, 최원진, 최윤선, 최은미 "200 GHz Staggered Double-Vane Traveling-Wave Tube 설계 및 분석" (Aug 23-26, 2023)

[63] 2021 한국전자파학회 동계학술대회 (포스터) : Hong Eun Choi, EunMi Choi "Evaluation of complex permittivity of the high loss tangent materials at W-band region" (2021.02.17~2021.02.20)

[62] 2022 한국전자파학회 동계학술대회 (포스터) : Hong Eun Choi, EunMi Choi "Magentron injection gun (MIG) design for a dual frequency gyrotron" (Feb 9-12, 2022)

[61] 2022 한국전자파학회 동계종합학술대회 (포스터) : TaeGyu Han and EunMi Choi "Design of a Cavity for a 200/163 GHz Dual Frequency Gyrotron" (Feb 9-12, 2022)

[60] 2022년 한국전자파학회 동계종합학술대회 (포스터) : Wonjin Choi and EunMi Choi "Simulation Study on Stationary Beam Distribution in Emittance-Dominated-Regime Traveling-Wave Tubes" (Feb 9-12, 2022)

[59] 2021년 한국전자파학회 하계종합학술대회 (포스터) : 문석주, 고현, 최원진, 최은미 "Study of OAM mode identification based on interference patterns with Lens integrated meta-material OAM structures" (2021)

[58] 2021년 한국전자파학회 하계종합학술대회 (포스터) : 한태규, Ashwini Sawant, 최은미 "Higher Order Mode Generator by Using Dielectric Rod Waveguide in Millimeter Wave Regime" (2021)

[57] 2021년 한국전자파학회 하계종합학술대회 (포스터) : 최홍은, 최은미 "Triode-type magnetron injection gun simulation for a dual frequency gyrotron" (2021)

[56] 2021년 한국전자파학회 하계종합학술대회 (포스터) : Wonjin Choi and EunMi Choi "Simulation Study of Beam Emittance Effects on Terahertz Traveling-Wave Tubes" (2021)

[55] 한국군사과학기술학회 종합학술대회 (포스터) : 이인근. 신진우, 최은미 "Accuracy Improvement of Gyrotron performance prediction using accurate electron beam properties and Full 3-D magnetic field information" (2021)

[54] 한국정밀공학회 2021 춘계학술대회 (구두) : 이인근, 신진우, 최은미 "나노 정밀 가공 기술을 활용한 테라헤르츠 진공 전자 소자 개발" (2021)

[53] 2020 한국전자파학회 하계종합학술대회 구두발표, 제주 : 최원진, 신진우, 최은미* "Development of a compact 300 GHz traveling-wave tube using a sheet electron beam" (2020.08.19~2020.08.22)

[52] 2020 한국전자파학회 하계종합학술대회 포스터발표, 제주 : Ashwini Sawant, Ingeun Lee and EunMi Choi "Investigation of amplitude non-uniformity in OAM beams" (19-22 August, 2020)

[51] 2020 한국전자파학회 하계종합학술대회 구두 발표, 제주 : Ashwini Sawant, Ingeun lee and EunMi Choi "Fundamental Analysis of OAM THz Communication Systems" (19-22 August, 2020)

[50] 2020 한국전자파학회 하계종합학술대회 포스터발표, 제주 : TaeGyu Han, Ashwini Sawant and EunMi Choi "Design of an Interaction Cavity for a 100 kW, 200 GHz Gyrotron" (2020.08.19~08.22)

[49] 2020 한국전자파학회 하계종합학술대회 포스터발표, 제주 : Ingeun Lee, Ashwini Sawant, and EunMi Choi. "Dual-Beam Traveling Wave Tube Amplifier System Design for Orbital Angular Momentum Mode Division Multiplexing Wireless Communications" (2020.08.19~2020.08.22)

[48] 2020 한국전자파학회 하계종합 학술대회 포스터발표, 제주 : H.E. Choi, E.M. Choi "Simulation investigation of Smith-Purcell radiation at THz regime" (2020.08.19~08.22)

[47] 2020 한국전자파학회 하계종합 학술대회 포스터 발표, 제주 : Wonjin Choi, Ingeun Lee, Jinwoo Shin, and EunMi Choi "Design and Initial Experimental Results of Sheet Beam Electron Gun for 300 GHz Traveling-Wave Tube" (2020.08.19 ~ 08.22)

[46] 2019한국전자파학회 하계종합학술대회 : Wonjin Choi, Ingeun Lee, Jinwoo Shin, and EunMi Choi "Electron Beam Dynamics in a Newly Proposed Periodic Rectangular Quadrupole for a 300 GHz Sheet Beam Traveling-Wave Tube" (2019.08.22 - 2019.08.24)

[45] 2019년도 한국전자파학회 하계종합학술대회 : Ingeun Lee, Ashwini Sawant, Mun Seok Choe, and EunMi Choi "Compact Orbital-Angular-Momentum Beam Generation System Using Lens-Integrated Low-Reflectance Metamaterial Structure" (2019.8.22.~8.24.)

[44] 2019년도 한국전자파학회 하계종합학술대회 : 한태규, 최은미 "Study on Dielectric Heating of a Dielectric Material in a Cylindrical Cavity by Microwave" (2019. 08.22- 08.24)

[43] 한국물리학회 가을학술대회 : 최홍은, 최원진, 한태규, 최은미 "Improved dielectric resonator method using a TE01 mode to determine the dielectric constant at high frequency" (2018.10.24-2018.10.26)

[42] 2018년 한국전자파학회 하계종합학술대회 : 최홍은, 최원진, 최은미 "Improved dielectric resonator method using a TE01 mode to determine the dielectric constant at high frequency" (2018.08.23-2018.08.25)

[41] 2018년도 한국전자파학회 하계종합학술대회 : 최원진, 이인근, 최은미   "Design Study of Two-Plane Focusing Periodic Permanent Magnet For a 300 GHz Sheet-Beam Traveling-Wave Tube" (2018. Oct. 24-28)

[40] 2018 KPS Fall Meetng : Wonjin Choi, Ingeun Lee, EunMi Choi "Magnetic Focusing System for 300 GHz Sheet Electron Beam Traveling-Wave Tube Using Periodic Permanent Magnet" (2018. Aug. 23-25)

[39] The KSTAR conference 2018, Muju, Korea : A. Sawant, I. Lee, M. S. Choe and E. M. Choi "Time-Dependent Code Development for Gyrotron Design" (21-23 Feb. 2018)

[38] 한국전자파학회 (KIEES) 하계종합학술대회 2018, 제주, 한국 : Ashwini Sawant, Mun Seok Choe, Ingeun Lee and EunMi Choi "Design and Operation of a second harmonic dual mode gyrotron for OAM beam generation" (23-25 August, 2018)

[37] 한국전자파학회 (KIEES) 하계종합학술대회 2017, 제주, 한국 : Ashwini Sawant and EunMi Choi "Reduction of fundamental mode competition in 400 GHz second harmonic Gyrotron" (24-26 August 2017)

[36] 한국군사과학기술학회(KIMST) 2017, 제주, 한국 : 이인근, 최원진, 최은미 "나노 CNC 가공기를 이용한 Y 주파수 대역 Folded Waveguide 제작 및 평가" (8-9, June, 2017)

[35] 한국전자파학회 (KIEES) 하계종합학술대회 2017, 제주, 한국 : Ingeun Lee, Wonjin Choi, Jinwoo Shin, and EunMi Choi "Nano-CNC machining of a Folded-Waveguide Slow-Wave Structure for sub-THz Traveling-Wave Tube" (23-25, August, 2017)

[34] 한국전자파학회 (KIEES) 하계학술대회 2017, 제주, 한국 : Wonjin Choi, Ingeun Lee, and EunMi Choi "Design, Fabrication and Test of a Sine Waveguide Circuit for a 300 GHz Traveling-Wave Tube" (23-25, August, 2017)

[33] 한국군사과학기술학회(KIMST) 2016, 제주, 한국 : 김동성, 유동호, Sawant Ashwini, 최문석, 최은미 "플라즈마 방전 현상을 이용한 방사능 물질 원격 탐사 기법" (June 9-10)

[32] K-J workshop on plasma heating 2016 : A. Sawant, M. S. Choe  and E. M. Choi* "Phase Retrieval of a High Power Gyrotron Vortex Beam" (14-16 Dec 2016)

[31] 한국물리학회(KPS) 2016, 광주, 한국 : Dongsung Kim, Mun Seok Choe, Dongho Yu, Ashwini Sawant, and EunMi Choi "Observation of Pulse Shortening Based on Plasma Discharge Phenomenon in W-band Gyrotron" (Oct. 19-21, 2016)

[30] K-J Seminar, Busan, Korea : Dongsung Kim, Dongho Yu, Ashwini Sawant, and EunMi Choi "Experimental Study on Plasma Breakdown Delay Time under Low Pressurized Argon Gas Using a W-band High-power Millimeter-wave Source" (Aug. 24-27)

[29] 한국군사과학기술학회(KIMST) 2016, 제주, 한국 : 이인근, 최원진, 최은미 "자가 발진 Y 주파수대역 Folded waveguide Traveling wave tube 개발 연구" (Jun. 9-10, 2016)

[28] 한국물리학회(KPS) 2016, 대전, 한국 : Ingeun Lee, A. Sawant, J. H. So, Y. Hong, E. M. Choi "Design Study of a Self-Driving G-band Folded Waveguide Traveling Wave Tube with an Integrated High Input Power" (Apr. 20 - 22, 2016 )

[27] KPS Fall Meeting 2016, October 19-21, Gwangju, Korea : Ashwini Sawant, Mun Seok Choe and EunMi Choi "Design and fabrication of a W-band quasi-optical mode generator" (2016)

[26] 2016 한국전자파학회 하계종합학술대회 : 최원진, 이인근, 최은미 "사인형 도파관을 이용한 G밴드 TWT(진행파관)의 설계" (06. 16 - 06.18, 2016)

[25] 2016 한국물리학회 봄학술논문발표회 : Wonjin Choi, EunMi Choi "Design Study of a Sine Waveguide Circuit for G-band Traveling-Wave Tube" (4. 20 - 4. 22, 2016)

[24] K-STAR Conference, Daejeon, Korea : Dongsung Kim, Sung Gug Kim, Ashwini Sawant, Dongho Yu, Mun Seok Choe, and EunMi Choi "Analysis of Delay Time Distribution for Argon Plasma Discharge Using a Sub-THz Gyrotron" (Feb. 24-26, 2016)

[23] 2015, KIEES conference : Ashwini Sawant, Mun Seok Choe, Wonjin Choi, Dongho Yu and EunMi Choi "A Rotating TEm,p High Order Mode Converter Design Using Periodic Wall Perturbation in Millimeter-Wave Regime" (August 19-21, Jeju, Korea (2015))

[22] Photonics Conference 2015 : 유동호, 김동성, Ashwini Sawant, 최은미*, "Generation of an orbital angular momentum (OAM) mode using a high power THz gyrotron" (2015)

[21] 2015 한국전자파학회 하계종합학술대회, Jeju, Korea : W. Choi, A. Sawant, and E. M. Choi* "Design of a W-band Circular TE03 Mode Generator" (201508)

[20] KPS Fall Meeting 2015, October 21-23, Kyoungjoo, Korea : D. H. Yu, A. Sawant, and E. M. Choi* "Generation of a Laguerre-Gaussian beam using a spiral phase plate at W-band" (2015)

[19] KPS Fall Meeting 2015, October 21-23, Kyoungjoo, Korea : D. S. Kim, S. G. Kim, M. S. Choe, A. Sawant, and E. M. Choi* "Measurement of onset time of plasma breakdown under various low pressurized gaseous states using a high power gyrotron" (2015)

[18] KPS Fall Meeting 2015, October 21-23, Kyoungjoo, Korea : M. S. Choe, K. S. Lee, N. E. Yu, and E. M. Choi* "The measurement of minority carrier lifetime using semiconductor fast switching system in millimeter wave regime" (2015)

[17] KPS Spring Meeting 2015, April 22-24, Daejeon, Korea : D. Kim, S. G. Kim, M. S. Choe, I. Lee., A. Sawant, and E. M. Choi "Breakdown Experiment under Low Pressurized Gaseous Condition Using a High Power Millimeter Wave Gyrotron Oscillator" (2015)

[16] KPS Spring Meeting 2015, April 22-24, Daejeon, Korea : M. S. Choe, K. S. Lee, N. E. Yu, and E. M. Choi＊   "The Concept of Fast Switching System using Photo-excited Media for Electromagnetic Wave Transmission in Millimeter Wave Regime" (2015)

[15] 6th THz-Bio Workshop, Seoul : I. Lee, M. S. Choe, D. J. Lee, and E. M. Choi* "In-situ Measurement of a Higher Order Mode Conversion at Millimeter-wave Range" (2015)

[14] 2015 KSTAR Conference, DCC Convention Center, Daejeon : M. S. Choe, I. Lee, D. J. Lee, and E. M. Choi* "Higher Order Mode (TEmp) Generation at Millimeter-wave and Its Precies Measurement" (2015)

[13] 2015 KSTAR Conference, DCC Convention Center, Daejeon : S. G. Kim, J. H. Kim, A. Sawant, M. S. Choe, D. S. Kim, J. H. So, W. J, and E. M. Choi* "Activity on Gyrotron Development at UNIST" (2015)

[12] 2014년 한국전자파학회 종합학술발표회, Coex, Seoul : W. Choi, I. G. Lee, and E. M. Choi* "Design Study of an Extended Interaction Oscillator (EIO) for Ka-band Folded Waveguide Traveling-wave Tube (FWTWT)" (2014)

[11] KIMST 2014 (The Korea Institute of Military Science and Technology) : 김동성, 이정혁, 김성국, 이인근, 최문석, Ashwini Sawant, 정미, 이인혁, 한원순, 배영순, 김정호, 이우상, 소준호, 최은미 "Design of a calorimeter for measurement of high power gyrotron" (2014)

[10] KIMST 2014 (The Korea Institute of Military Science and Technology) : 김성국, 김동성, 최문석, 소준호, 최은미 "간단한 고차모드 발생기 설계를 통한 새로운 모드변환기 성능 검증 방법 연구" (2014)

[9] KIMST 2014 (The Korea Institute of Military Science and Technology) : 양종원, 이우상, 신진우, 홍용준, 이민우, 염승환, 소준호, 김정호, 김동성, 최은미, 윤영중 "Study on the Transmission Characteristics of the Window for W-band Gyrotron" (2014)

[8] KIMST 2014 (The Korea Institute of Military Science and Technology) : 김정호, 원종효, 김동성, 최은미, 김우영, 박해윤, 최준호, 양종원, 소준호, 오승섭 "Electromagnetic and Thermal Anaylsis of a Millimeter-wave Window" (2014)

[7] KPS 2013, CECO, Chanwon : I. G. Lee, S. G. Kim, J. H. So, Y. J. Hong, J. H. Won, E. M. Choi "Design Study of a Magnetron Injection Gun (MIG) for a High Power W-band Gyrotron" (2013)

[6] 춘계 마이크로파 및 전파전파 학술대회, Coex, Seoul : K. H. Kim, M. S. Choe, and E. M. Choi "Experimental study on a TE62 mode generation using a quasi-optical system" (2012)

[5] 한국전자파학회 종합학술대회, Coex, Seoul : D. S. Kim, S. G. Kim, K. H. Kim, M. S. Choe, I. G. Lee, and E. M. Choi "Possible use of a high power THz source for gamma ray detection" (2012)

[4] 제 3회 신특수 에너지 무기 학술대회, Daejun, Korea : K. H. Kim, M. S. Choe, and E. M. Choi* "Generation of higher order mode for W-band gyrotron oscillator" (2012)

[3] 춘계 마이크로파 및 전파전파 학술대회 (한국전자파학회) : K. H. Kim, M. S. Choe, and E. M. Choi* "Design study of a 95 GHz, TE62 mode generator" (2012)

[2] KPS, Spring 2011, Daejun, Korea : D. S. Kim, Y. Kim, and E. M. Choi "Study on creation of free electrons from concealed radioactive materials using the MCNPX code system" (2011)

[1] KPS, Spring 2011, Daejun, Korea : S. G. Kim, K. H. Kim, H. Cho, and E. M. Choi "New observations in resonances and polarizations of a multi-layered metamaterial" (2011)

Conferences

[22] 한국군사과학기술학회(KIMST) 2017, 제주, 한국 : 이인근, 최원진, 최은미 "나노 CNC 가공기를 이용한 Y 주파수 대역 Folded Waveguide 제작 및 평가" (8-9, June, 2017)

[21] 한국전자파학회 (KIEES) 하계종합학술대회 2017, 제주, 한국 : Ingeun Lee, Wonjin Choi, Jinwoo Shin, and EunMi Choi "Nano-CNC machining of a Folded-Waveguide Slow-Wave Structure for sub-THz Traveling-Wave Tube" (23-25, August, 2017)

[20] 한국전자파학회 (KIEES) 하계학술대회 2017, 제주, 한국 : Wonjin Choi, Ingeun Lee, and EunMi Choi "Design, Fabrication and Test of a Sine Waveguide Circuit for a 300 GHz Traveling-Wave Tube" (23-25, August, 2017)

[19] EPJ Web Conf. 2017 : Mun Seok Choe, Ashwini Sawant and EunMi Choi "The Experimental Verification of Gaussian Beam Coupling for ECH Transmission Line at 400GHz" (24 July 2017 [DOI: https://doi.org/10.1051/epjconf/201714704009])

[18] IVEC 2017, London, United Kingdom : Wonjin Choi, Ingeun Lee, EunMi Choi "Design and nano-CNC fabrication of modified sine waveguide for 300 GHz traveling-wave tube" (April 24-26, 2017)

[17] K-J workshop on plasma heating 2016 : A. Sawant, M. S. Choe  and E. M. Choi* "Phase Retrieval of a High Power Gyrotron Vortex Beam" (14-16 Dec 2016)

[16] EC-19, 19th Joint workshop on ECE and ECRH, Gandhinagar, INDIA, 2016 : : Mun Seok Choe, Ashwini Sawant and EunMi Choi "The Experimental Verification of Gaussian Beam Coupling for ECH Transmission Line at 400GHz" (April 04-07, 2016)

[15] 2016 한국전자파학회 하계종합학술대회 : 최원진, 이인근, 최은미 "사인형 도파관을 이용한 G밴드 TWT(진행파관)의 설계" (06. 16 - 06.18, 2016)

[14] 2016 한국물리학회 봄학술논문발표회 : Wonjin Choi, EunMi Choi "Design Study of a Sine Waveguide Circuit for G-band Traveling-Wave Tube" (4. 20 - 4. 22, 2016)

[13] Photonics Conference 2015 : 유동호, 김동성, Ashwini Sawant, 최은미*, "Generation of an orbital angular momentum (OAM) mode using a high power THz gyrotron" (2015)

[12] PAC 2009: Poster presentation, Vancouver, Canada : E. M. Choi et al "Design of the fundamental mode damper and the HOM dampers for the 56 MHz SRF cavity" (2009)

[11] IVEC 2007: Oral presentation, Kitakyushu, Japan : E. M. Choi et al "Experimental Study on Gyrotron Efficiency Enhancement" (2007)

[10] IRMMW-THz 2007, Cardiff, UK : E. M. Choi et al "Experimental Study of a 1.5 MW, 110 GHz Gyrotron with a Single-Stage Depressed Collector" (2007)

[9] APS-DPP meeting 2006: Poster presentation, Philadelphia, CA : E. M. Choi et al "Experimental Study of a High Efficiency 1.5 MW, 110 GHz gyrotron" (2006)

[8] IVEC & IVESC 2006: Oral presentation, Monterey, CA : E. M. Choi et al "Experimental Study of High Efficiency 1.5 MW, 110 GHz gyrotron with a Depressed Collector" (2006)

[7] IRMMW-THz 2005: Oral presentation, Williamsburg, VA : E. M. Choi et al "“Experimental Results for a 1.5 MW, 110 GHz gyrotron with an Improved Cavity" (2005)

[6] ICOPS 2005: Poster presentation, Monterey, CA : E. M. Choi et al "New Experimental Results from a 1.5 MW, 110 GHz Gyrotron at MIT" (2005)

[5] IVEC 2004: Oral presentation, Monterey, CA : E. M. Choi et al "MAGY Simulations of 1.5 MW, 110 GHz MIT Gyrotron with Non-Uniform Electron Emission" (2005)

[4] APS-DPP meeting 2004: Poster presentation, Savannah, GA : E. M. Choi et al "A 1.5 MW, 110 GHz Gyrotron with a Depressed Collector" (2004)

[3] ICOPS 2003: Poster presentation, Jeju, Korea : E. M. Choi et al "A 1.5 MW, 110 GHz High Efficiency Gyrotron for Tokamak Plasma Heating" (2003)

[2] KPS Spring Meeting 2015, April 22-24, Daejeon, Korea : D. Kim, S. G. Kim, M. S. Choe, I. Lee., A. Sawant, and E. M. Choi "Breakdown Experiment under Low Pressurized Gaseous Condition Using a High Power Millimeter Wave Gyrotron Oscillator" (2015)

[1] KPS Spring Meeting 2015, April 22-24, Daejeon, Korea : M. S. Choe, K. S. Lee, N. E. Yu, and E. M. Choi＊   "The Concept of Fast Switching System using Photo-excited Media for Electromagnetic Wave Transmission in Millimeter Wave Regime" (2015)