Publications

1. Junseok Ma, "A Study of Liquid Crystal-based Phase Shifter in the Millimeter-wave Range for Utilizing Current Mass-production Technology of Display Industry.", MS thesis, 2021, Department of Electrical Engineering, Pohang University of Science and Technology, Pohang, Korea.

2024

7. Jin-Young Choi, Jun-Seok Ma, Hyun-Woo Oh, and Wook-Sung Kim*, “Reconfigurable Narrow-Band Bandpass Filter Using Electrically-Coupled Open-Loop Resonators Based on Liquid Crystals”, J. Phys. D: Appl. Phys., 2024.

6. Jae-Hwan Lee, Jun-Seok Ma, Chan-Heon An, Gi-Ho Lee, and Seung-Won Oh*, “Advanced Light: Liquid crystals-based ultra-broadband polarization rotator for functional smart devices”, Small Methods, 2023 (IF: 15.367 (2022)).

2023

5. Junseok Ma, Jinyoung Choi, Sungeun Park, Imbo Kong, Daehyeon Kim, Cheonga Lee, Youngno Youn, Myeonggin Hwang, Seungwon Oh*, Wonbin Hong*­­­­, and Wooksung Kim*, “Liquid Crystals for Advanced Smart Devices with Microwave and Millimeter-wave Applications: Recent progress for Next-generation Communications", Adv. Mater, 2023.  (IF:32.086 (2022), JCR 3% in CHEMISTRY, MULTIDISCIPLINARY, CHEMISTRY, PHYSICAL)' 

4. Hyunji Shin+, Junseok Ma+, Jinyoung Choi+, and Wooksung Kim*, "Phase Shifting Enhancement of a Substrate-Integrated Waveguide Phase Shifter based on Liquid Crystal", Appl. Sci.,2023. (+  Authors contributed equally to this work.)

2022

3. Junseok Ma, Jinyoung Choi, Hyunji Shin, Jaewhan Lee, Seungwon oh*, and Wooksung Kim*, "An evaluation of Surface-Active Agent Hexadecyltrimethylammonium Bromide with Vertical Self-Alignment Properties to Align Liquid Crystals for Various Cell Gap Conditions", Appl. Sci., 12(24), 12582, 2022.

2021

2. Junseok Ma, Jinyoung Choi, Seungwon Oh, and Wooksung Kim*, “Liquid-Crystal-Based Floating-Electrode-Free Coplanar Waveguide Phase Shifter with an Additional Liquid-Crystal Layer for 28-GHz Applications”, J. Phys. D: Appl. Phys., 55(9), 095106, 2021.

1. Junseok Ma, Jinyoung Choi, and Wooksung Kim* "액정의 고주파 대역 특성과 RF 응용 기술 동향", Inf. Disp., 22(3), pp. 15-26, 2021.

2024

7. Hyunwoo Oh, Sungeun Park, Jinyoung Choi, Junseok Ma, Seungho Choi and Wooksung Kim “Analysis of Meander Delay Line Liquid Crystal Phase Shifter using Director Angle Extraction” 2024 International Meeting on Information Display (IMID), 2024.

6. Jinyoung Choi, Junseok Ma, Hyunwoo Oh, and Wooksung Kim*, “Characterization of Nematic Liquid Crystals at 10 GHz using an Open Stub Resonator”, 2024 IEEE International Symposium on Antennas and Propagation and ITNC-USNC-URSI Radio Science Meeting (AP-S/URSI 2024), 2024

2022

5. Jinyoung choi, Junseok Ma, Hyunji Shin and Wooksung Kim*, “Reconfigurable phased array antenna based on liquid crystal with miniaturized bandpass filter”, 2022 International Symposium on Antennas and Propagation (ISAP), IEEE, 2022.

4. Hyunji Shin, Jinyoung choi, Junseok Ma, and Wooksung Kim*, “Phase Shift Enhancement of Substrate Integrated Waveguide Phase Shifter using Liquid Crystal", 2022 International Meeting on Information Display (IMID), 2022.

3. Junseok Ma, Jinyoung choi, Hyunji Shin and Wooksung Kim*, “Comparative Analysis of Liquid-Crystal Driving between the Grounded-Coplanar Waveguide and the Floating-Electrode-Free Coplanar Waveguide in Liquid-Crystal Phase Shifters”, 2022 IEEE USNC-URSI Radio Science Meeting (Joint with AP-S Symposium). IEEE, 2022.

2021

2. Junseok Ma, Hyunji Shin and Wooksung Kim*, “Analysis about Novel Design of Liquid Crystal Based Floating Electrode Free Coplanar Waveguide Phase Shifter for Performance Improvement", 2021 International Meeting on Information Display (IMID), 2021.

2020

1. Sion Cha, Junseok Ma, and Wooksung Kim*, “Concept and Numerical Modeling for virtual acceleration sense on vestibular organ using focused ultrasound", 2020 International Meeting on Information Display (IMID), 2020.

2024

3. Junseok Ma, Seungwon Oh, Jinyoung Choi, Hyunwoo Oh, Stephen M. Morris*, and Wooksung Kim*, "Enhancing Light-driven Polymer Stabilized Liquid Crystal Smart Devices",  The British Liquid Crystal Society: BLCS (2024).

2. J.Y. Choi, J.S. Ma, H.W. Oh, W.S. Kim, "Characterization of Nematic Liquid Crystal at 10 GHz using Director Angle Extraction", 24th Korea Liquid Crystal Conference (2024) 

2023

1. Jinyoung Choi, Junseok Ma, Sungeun Park, and Wooksung Kim*, ""전기적 커플링 오픈 스터브를 이용한 소형 액정 기반 가변 광대역 대역저지 필터", IEIE, 2023.

1.  Sion Cha etal., "Comprehensive numerical model of vestibular system to quantify rotational cybersickness in virtual reality ", Scientific report, 2023.

2. Sion Cha etal., "Acoustic streaming effect on a vestibular system for virtual rotational sense using low-intensity focused ultrasound", Case study in thermal engineering, 2023.