Junseok Ma BEng MEng

Junseok Ma earned his B.S. in Electrical Engineering from Pohang University of Science and Technology (POSTECH) in 2020, followed by the completion of his M.S. in the same field at POSTECH in 2022. Presently, he is pursuing a Ph.D. degree at POSTECH under the supervision of Prof. Wooksung Kim at the Wave Arrays&Display Engineering group (WADE group). Currently, Junseok is also involved in his Ph.D. study as a Visiting Ph.D. student (Recognised Student Scheme) within the Department of Engineering Science at the University of Oxford. He is studying under the supervision of Prof. Stephen M. Morris and Prof. Steve Elston at the Soft Matter Photonics Group (SMP Group).

1. Kim. Jong-Han Foundation Scholarship, Republic of Korea (2018).

2. Samsung Electronics MX Division, Antenna Prior Research Organization, A Sponsorship program for Ph.D. Student (2023).

3. Grand Prize, The 8th Electromagnetic Wave Measurement Thesis Contest, The Korean Institute of Electromagnetic Engineering and Science, Republic of Korea (2023).

4. BK21 FOUR Outstanding Graduate Student International Funding Program for visiting the University of Oxford, sponsored by the Government of the Republic of Korea (2023).

5. BK21 Interdisciplinary Research Group Support Funding Program, sponsored by the Government of the Republic of Korea (2023).

6. Excellence Awards (2nd prize), 3rd Outstanding Performance (Outstanding Student) Contest, Department of Electrical Engineering at POSTECH, Republic of Korea (2024).

7. Excellent Paper Challenge Prize, 4th POSTECH Best Paper Competition, POSTECH, Republic of Korea (2024)

8. Published work on liquid crystals based communications (“Liquid Crystals for Advanced Smart Devices with Microwave and Millimeter-wave Applications: Recent progress for Next-generation Communications") was featured as a frontispiece cover of the high-impact journal; Advanced Materials

His research encompasses the areas of microwave engineering and liquid crystal applied technology, with a focus on advanced LC-based smart devices.

• Advanced smart windows using liquid crystals
• Reconfigurable GHz-phase shifters and antennas using
  liquid crystals
• Printing technologies for functional smart devices
  (Recofigurable, deformable, etc,)

Dissertation (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.

Journal Papers (6)

• Junseok Ma, Jinyoung Choi, and Wooksung Kim* "High-frequency Band Characteristics and Recent Trends in RF
  Applications of Liquid Crystals ", Information Display 22(3), pp. 15-26, 2021.
• 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.
• 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.
• Hyunji Shin+, Junseok Ma+, Jinyoung Choi+, and Wooksung Kim*, “Phase Shift Enhancement of Substrate
  Integrated Waveguide Phase Shifter using Liquid Crystal”, Appl. Sci., 13(4), 2504, 2023.
• 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)'
  - Featured as Frontispiece Cover
• Jae-Hwan Lee, Jun-Seok Ma, Chan-Heon An, Gi-Ho Lee, and Seung-Won Oh*, “Advanced Light: Liquid crystalsbased ultra-broadband polarization rotator for functional smart devices”, Small methods, 2023 (IF: 15.367 (2022)).

Conference Papers (8)

• 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.
• 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.
• 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.
• 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.
• 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.
• Jinyoung Choi, Junseok Ma, Sungeun Park, and Wooksung Kim*, "Compact liquid crystal-based tunable broadband
  bandstop filter using electrically coupled open stub", IEIE, 2023.
• Jinyoung Choi, Junseok Ma, Hyunwoo Oh and Wooksung Kim*, "Characterization of Nematic Liquid Crystal at 10
  GHz using Director Angle Extraction", Korea Liquid Crystal Conference, 2024.
• Junseok Ma, Seungwon Oh, Jinyoung Choi, Hyunwoo Oh, Stephen M. Morris*, and Wooksung Kim*, "Enhancing
  Light-driven Polymer Stabilized Liquid Crystal Smart Devices", 2024 The British Liquid Crystal Society: BLCS, 2024