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Efficiency enhancement of a 1.5-MW, 110-GHz gyrotron with a single-stage depressed collector

Choi, EunMi , Cerfon, A. J. , Mastovsky, I. , Shapiro, M. A. , Sirigiri, J. R. , Temkin, R. J.

Article Issue Date2007-08 View12

Electromagetic and Thermal Analysis of a Millimeter-wave Window

Choi, EunMi , 김동성 , 김우영 , 김정호 , 박해윤 , 소준호 , 양종원 , 오승섭 , 원정효 , 최준호

Conference Paper Issue Date2014-06-19 View7

Error Tolerant Method of Dielectric Permittivity Determination Using a TE₀₁ Mode in a Circular Waveguide at the W-Band File

Choi, Hong Eun , Choi, Wonjin , Simakov, Evgenya I. , Zuboraj, Muhammed , Carlsten, Bruce E. , Choi, EunMi

Article Issue Date2020-02 View21

Evaluation of complex permittivity of the high loss tangent materials at W-band region

Choi, Hong Eun , Choi, EunMi

Conference Paper Issue Date2021-02-17 View4

Excellent photonic-assisted measurement system for high order mode pattern scan in reactive near field File

Lee, Ingeun , Choe, Mun Seok , Lee, Dong-Joon , Choi, EunMi

Conference Paper Issue Date2015-08-24 View11

Experimental Investigation of a Dual-Beam Traveling Wave Tube File

Choi, Hong Eun , Choi, Wonjin , Lee, Junyoung , Choi, EunMi

Article Issue Date2024-07 View4

Experimental observation of the effect of aftercavity interaction in a depressed collector gyrotron oscillator File

Choi, EunMi , Shapiro, M. A. , Sirigiri, J. R. , Temkin, R. J.

Article Issue Date2007-09 View12

Experimental results for a 1.5 MW, 110 GHz gyrotron oscillator with reduced mode competition File

Choi, EunMi , Marchewka, CD , Mastovsky, I , Sirigiri, JR , Shapiro, MA , Temkin, RJ

Article Issue Date2006-02 View13

Experimental Results on a 1.5MW, 110GHz Gyrotron with a Smooth Mirror Mode Converter File

Tax, David S. , Choi, Eunmi M. , Mastovsky, Ivan , Neilson, Jeffrey M. , Shapiro, Michael A. , Sirigiri, Jagadishwar R. , Temkin, Richard J. , Torrezan, Antonio C.

Article Issue Date2011-03 View7

Experimental study on a TE62 to HE11 mode converter via free space Gaussian mode conversion using a

Choi, Eun Mi , None

Conference Paper Issue Date2013 View8

Experimental study on OAM mode antenna misalignment in E-band

Go, Hyun , Sawant, Ashwini , Choi, Wonjin , Moon, Seokju , Choi, EunMi

Conference Paper Issue Date2021-08-18 View8

Experimental Study on Plasma Breakdown Delay Time under Low Pressurized Argon Gas Using a W-band High-power Millimeter-wave Source

Kim, Dongsung , Yu, Dongho , Sawant, Ashwini , Choi, EunMi

Conference Paper Issue Date2016-08-24 View6

Experimental Verification on Remote Detectability of Concealed Radioactive Material Based on the Plasma Discharge Delay Time using High-Power Millimeter-Wave

Kim, Dongsung , Kim, Dongho , Sawant, Ashwini , Choe, Mun Seok , Lee, Ingeun , Choi, EunMi

Conference Paper Issue Date2016-10-31 View8

Extream Near-Field Mode Pattern Scan for a TE02 Mode Converter Using the Electro-Optic Probe System

Choi, EunMi , Lee, DJ , Lee, IG

Conference Paper Issue Date2014-05-22 View8

E‐Band Metasurface‐Based Orbital Angular Momentum Multiplexing and Demultiplexing File

Chung, Hyeongju , Kim, Daeik , Choi, EunMi , Lee, Jongwon

Article Issue Date2022-06 View23

Feasibility study on performance test of a quasi-optical mode converter using a linear, simple higher order mode generator File

Kim, Sung Gug , Kim, DongSung , Choe , Mun Seok , So, Joonho , Choi, Eun Mi

Conference Paper Issue Date2014-04-22 View11

Ferrite-damped higher-order mode study in the Brookhaven energy-recovery linac cavity File

Hahn, H. , Choi, EunMi , Hammons, L.

Article Issue Date2009-02 View9

First experimental observation of plasma breakdown for detection of radioactive material using a gyrotron in real-time File

Kim, Dongsung , Yu, Dongho , Sawan, Ashwini , Choe, Mun Seok , Choi, EunMi

Conference Paper Issue Date2017-04-24 View13

Frequency splitting of a multi-layered electric ring resonator File

Kim, S. G. , Kim, K. H. , Jung, H. S. , Cho, Hyungjoon , Choi, EunMi

Article Issue Date2011-07 View7

Friis transmission 이론을 이용한 실시간 고출력 RF 파워 측정방법

김성국 , 김정호 , 김동성 , 최은미

Conference Paper Issue Date2016-06-16 View11

Fundamental Analysis of OAM THz Communication Systems

Sawant, Ashwini , Lee, Ingeun , Choi, EunMi

Conference Paper Issue Date2020-08-20 View10

Fundamentals of Electromagnetic Wave Orbital Angular Momentum

Choi, EunMi

Conference Paper Issue Date2022-05-20 View12

Generation and Validation of Topological Charges of High-Power Gyrotron Orbital Angular Momentum Beams From Phase Retrieval Algorithm File

Sawant, Ashwini , Yu, Dongho , Kim, Dongsung , Choe, Mun Seok , Choi, EunMi

Article Issue Date2017-03 View23

Generation of a Laguerre-Gaussian beam using a spiral phase plate at W-band

Yoo, Dongho , Sawant, Ashwini , Choi, EunMi

Conference Paper Issue Date2015-10-21 View21

Generation of an orbital angular momentum (OAM) mode using a high power THz gyrotron

유동호 , 김동성 , Ashwini Sawant , Choi, EunMi

Conference Paper Issue Date2015-12-02 View9

Generation of E-band metasurface-based vortex beam with reduced divergence angle File File

Chung, Hyeongju , Kim, Daeik , Sawant, Ashwini , Lee, Ingeun , Choi, Eunmi , Lee, Jongwon

Article Issue Date2020-05 View26

Gereration of Higher Order Mode for W-band Gyrotron Oscillator

Choi, Eun Mi

Conference Paper Issue Date2012 View11

Graphene Nonlinear Metasurface to extremely Enhance the High-harmonic Generations at Terahertz Region

Kim, Daeik , Choi, Hong Eun , Han, Taegyu , Choi, EunMi , Lee, Jongwon

Conference Paper Issue Date2022-09-19 View10

Guided & Unguided EM Waves for Investigating Material Property

Choi, EunMi

Conference Paper Issue Date2019-10-01 View12

High power terahertz sources: new applications and challenges

Choi, EunMi

Conference Paper Issue Date2023-05-23 View7

High-Density Plasma Diagnosis Using Quasi-Optical Millimeter-Wave Systems File

Choe, Mun Seok , Sawant, Ashwini , Choi, EunMi

Article Issue Date2020-11 View14

High-Directivity Orbital Angular Momentum Antenna for Millimeter-Wave Wireless Communications File

Lee, Ingeun , Sawant, Ashwini , Choi, EunMi

Article Issue Date2021-07 View20

High-Power Millimeter-Wave Orbital Angular Momentum Mode Identification Using Double Slit Interference File

Moon, SeokJu , Yu, Dongho , Choi, EunMi

Article Issue Date2023-12 View22

High-Precision Complex Permittivity Measurement of High Loss Dielectric Materials Using a Geometrical Gap in Millimeter Wave Frequency File

Choi, Hong Eun , Choi, EunMi

Article Issue Date2024-02 View24

Higher Order Mode (TEmp) Generation at Millimeter-wave and Its Precies Measurement

Choi, Moonseok , Lee, Ingeun , Lee, Dongjun , Choi, EunMi

Conference Paper Issue Date2015-02-25 View17

Higher order mode generation in millimeter wave regime by directly launched fundamental mode File

Choe, Mun Seok , Choi, EunMi

Article Issue Date2014-07 View48

Higher Order Mode Generator by Using Dielectric Rod Waveguide in Millimeter Wave Regime

Han, Tae Gyu , Sawant, Ashwini , Choi, EunMi

Conference Paper Issue Date2021-08-18 View20

Higher Order Mode Generator by using Dielectric Rod Waveguide in Millimeter Wave Regime

Han, Tae Gyu , Sawant, Ashwini , Choi, EunMi

Conference Paper Issue Date2021-02-17 View7

Higher Order Mode Generator Direct-coupled with a Dielectric Rod Waveguide at W-band

Han, Taekyu , Lim, Jinho , Choi, EunMi

Conference Paper Issue Date2022-04-28 View7

Highly-Sensitive Plasmonic Nano-Ring Transistor for Monolithic Terahertz Active Antenna File

Ryu, Min Woo , Patel, Ramesh , Jang, ESan , Ahn, Sang Hyo , Jeon, Hyeong Ju , Choe, Mun Seok , Choi, EunMi , Han, Ki Jin , Kim, Kyung Rok

Conference Paper Issue Date2017-07-26 View14

Imaging of atmospheric air breakdown caused by a high-power 110-GHz pulsed Gaussian beam File

Hidaka, Yoshiteru , Choi, EunMi , Mastovsky, I. , Shapiro, M. A. , Sirigiri, J. R. , Temkin, R. J.

Article Issue Date2008-08 View26

Improved dielectric resonator method using a TE01 mode to determine the dielectric constant at high frequencies

최은미 , 최홍은 , 최원진 , 한태규

Conference Paper Issue Date2018-10-26 View20

Improved dielectric resonator method using a TE01 mode to determine the dielectric constant at high frequency

최홍은 , 최원진 , 최은미

Conference Paper Issue Date2018-08-25 View10

In situ endoscopic observation of higher-order mode conversion in a microwave mode converter based on an electro-optic probe system File File

Lee, Ingeun , Lee, Dong-Joon , Choi, EunMi

Article Issue Date2014-11 View20

Investigation of amplitude non-uniformity in OAM beams generated using transmissive structures

Sawant, Ashwini , Lee, Ingeun , Choi, EunMi

Conference Paper Issue Date2020-08-20 View10

Machine Learning Guided Alignment System for a W-Band Higher Order Mode Generator File

Baijukya, Edrick , Lim, JinHo , Choi, EunMi

Article Issue Date2024-03 View17

Magnetic Focusing System for 300 GHz Sheet Electron Beam Traveling-Wave Tube Using Periodic Permanent Magnet

최원진 , 이인근 , 최은미

Conference Paper Issue Date2018-10-28 View21

Measurement of onset time of plasma breakdown under various low pressurized gaseous states using a high power gyrotron

Kim, Dong Sung , Kim, Sung Gug , Choi, EunMi

Conference Paper Issue Date2015-10-21 View19

Measuring the carrier lifetime by using a quasi-optical millimeter- and THz-wave system File

Choe, Mun Seok , Sawant, Ashwini , Lee, Kyu-Sup , Yu, Nan Ei , Choi, EunMi

Article Issue Date2017-02 View53

Megawatt power level 120 GHz gyrotrons for ITER start-up File

Choi, EunMi , Marchewka, C. , Mastovsky, I. , Shapiro, M.A. , Sirigiri, J.R. , Temkin, R.J.

Article Issue Date2005-01 View7

Metasurface based Orbital Angular Momentum Multiplexing and Demultiplexing at E-band frequency

Chung, Hyeongju , Kim, Daeik , Choi, EunMi , Lee, Jongwon

Conference Paper Issue Date2022-05-20 View10

Microscopic Analyses of Electrical Conductivity of Micromachined-Folded Waveguides Based on Surface Roughness Measurement for Terahertz Vacuum Electron Devices File

Lee, Ingeun , Choi, Wonjin , Shin, Jinwoo , Choi, EunMi

Article Issue Date2018-11 View23

Millimeter-wave Higher Order Modes (HOM) and Orbital Angular Momentum (OAM)

Choi, EunMi

Conference Paper Issue Date2023-08-27 View13

Monolithic Circular Transistor-Antenna Design for High-Performance Plasmonic Millimeter-Wave Detectors File

Patel, Ramesh , Ryu, Min Woo , Choe, Mun Seok , Choi, EunMi , Kim, Kyung Rok , Han, Ki Jin

Article Issue Date2020-04 View16

n-situ Measurement of a Higher Order Mode Conversion at Millimeter-wave Range

Lee, Ingeun , Choi, Moonseok , Lee, Dongjun , Choi, EunMi

Conference Paper Issue Date2015-04-10 View15

Nano-CNC fabricating Y-band folded waveguide backward wave oscillator File

Lee, Ingeun , Shin, Jinwoo , Choi, EunMi

Conference Paper Issue Date2017-04-24 View44

Nano-CNC machining of a Folded-Waveguide Slow-Wave Structure for sub-THz Traveling-Wave Tube

이인근 , 최원진 , 신진우 , 최은미

Conference Paper Issue Date2017-08-24 View14

Nano-CNC machining of sub-THz vacuum electron devices File

Gamzina, Diana , Himes, Logan G. , Barchfeld, Robert , Zheng, Yuan , Popovic, Branko K. , Paoloni, Claudio , Choi, EunMi , Luhmann, Neville C.

Article Issue Date2016-10 View55

Near-Field Pattern of Large Aperture Higher Order Mode Generator Using Backpropagated Fields in Free Space File

Kim, Kwanghoon , Choe, Mun Seok , Lee, Woosang , So, Joonho , Choi, EunMi

Article Issue Date2014-04 View12

New observations in resonances and polarizations of a multi-layered metamaterial

Kim, SG , Kim, KH , Cho, H , Choi, Eun Mi

Conference Paper Issue Date2011-04-13 View11

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