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  • Professors Wook-Sung Kim and Won-Bin Hong’s Research Team Publishes Cover Article in Advanced Materials on Liquid Crystal-Based Next-Generation Antenna Technology

    POSTECH Research Team Led by Professors Wook-Sung Kim and Won-Bin Hong Publishes Cover Article on Liquid Crystal-Based Antenna Technology in Advanced Materials

    A collaborative research team from POSTECH, led by Professors Wook-Sung Kim and Won-Bin Hong, and composed of researchers including Jun-Seok Ma (first author, PhD candidate), Jin-Young Choi, Sun-Geun Park, Im-Bo Kong, Dae-Hyun Kim, Chung-Ah Lee, Young-No Yoon, and Myung-Jin Hwang, has published a comprehensive review on liquid crystal (LC)-based antenna design trends and future directions in the prestigious journal Advanced Materials. The paper has been selected as a Frontispiece cover article, highlighting its significance.

    Research Focus and Findings

    The study provides a thorough review of the current trends in LC-based antenna designs, emphasizing their performance improvements and potential new functionalities from the perspective of liquid crystal engineering.

    As operating frequencies increase, the frequency dependence of all RLGC component characteristics becomes more significant. At frequencies above tens of GHz, tunable L and C components are extremely rare, constrained by limitations such as semiconductor process capabilities, self-resonance frequency (SRF), and low-Q factors. In contrast, liquid crystals exhibit low-loss characteristics at high frequencies, reconfigurability, and cost competitiveness, making them an attractive material for next-generation communication systems.

    To date, LC-based antenna designs have primarily focused on optimizing device structures and electrical characteristics. Various RF components, such as LC-based phased array antennas, holographic antennas, and reconfigurable intelligent surfaces (RIS), have been proposed. Recent studies have also addressed improvements in response speed, tunability, and loss tangent for LC-based antennas.

    The research team highlights the need for optimization not only in antenna design but also in liquid crystal material properties and engineering techniques to overcome existing limitations and achieve further advancements.

    Significance and Future Impact

    This study is the first to review LC-based antenna design trends from the perspective of liquid crystal properties and propose a comprehensive future research direction. The findings are expected to have a significant impact on related fields, driving innovation in LC-based antenna technology and materials science.

    The research was supported by the Samsung Science and Technology Foundation, further emphasizing its importance in advancing next-generation communication systems.

    This achievement underscores POSTECH’s leadership in pioneering cutting-edge materials and device engineering for future wireless communication technologies.

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  • Professor Soo-Seok Choi’s Research Team Publishes Cover Article in Advanced Functional Materials on "3D Multi-Stretchable Color-Changing Devices"

    Professor Soo-Seok Choi’s Research Team Publishes Cover Article in Advanced Functional Materials on 3D Multi-Stretchable Optical Mechanisms

    The research team led by Professor Soo-Seok Choi from POSTECH’s Department of Electrical Engineering, comprising master’s student Chae-Hyun Kwon and PhD candidates Seung-Min Nam and Sang-Hyun Han, has been recognized for their groundbreaking study on the optical mechanisms of 3D Multi-Stretchable Chiral Nanostructures. Their work has been featured as an Inside Back Cover article in the prestigious journal Advanced Functional Materials (Impact Factor: 19).

    The study focuses on a novel mechanism to control the color wavelength of light through nanoscale adjustments under flexible, stretchable conditions. The team successfully implemented and analyzed the optical changes of helical chiral nanostructures in a 3D stretchable environment spanning the X, Y, and Z axes, marking the first-ever precise elucidation of the nanoscale optical changes in such structures.

    Significance of the Research
    Stretchable electronic and color-controlling technologies are widely regarded as the “dream technologies” of the flexible electronics field, with applications in sensors, semiconductors, displays, electronic skins, encryption, electromagnetic wave control, communications, and fashion. However, the ability to control the wavelength of light—the key determinant of color—has remained a challenging issue due to the need for precise nanoscale manipulation and understanding of light.

    This study goes beyond the limitations of conventional one-dimensional stretchable systems to explore and implement a true 3D multi-stretchable environment. The findings provide a comprehensive understanding of nanoscale optical characteristics and mechanisms, expanding stretchable technology from a 1D domain to a fully 3D framework.

    Future Impact
    The research sets a new standard for stretchable technology and is expected to inspire a wide range of follow-up studies and applications across various fields.

    This project was supported by the Samsung Science and Technology Foundation and the Industrial Technology Evaluation and Management’s Stretchable Demonstration Program, underscoring the collaborative effort to advance flexible technologies.

  • Dae-Hyun Kim (PhD Candidate) and Young-No Yoon (Postdoctoral Researcher) Win Awards at the 22nd Graduate Student Paper Competition in Electromagnetic Waves

    POSTECH’s Dae-Hyun Kim (PhD Candidate) and Young-No Yoon (Postdoctoral Researcher) Win Awards at the 22nd Graduate Student Paper Competition in Electromagnetic Waves

    Dae-Hyun Kim, a PhD candidate, and Young-No Yoon, a postdoctoral researcher from POSTECH’s Department of Electrical Engineering (advisor: Professor Won-Bin Hong), were recognized for their research excellence at the 22nd Graduate Student Paper Competition in Electromagnetic Waves. The competition was co-hosted by the Korea Radio Promotion Association (RAPA) and the Korean Institute of Electromagnetic Engineering and Science (KIEES). Kim received the Encouragement Award, and Yoon was honored with the Excellence Award (KIEES President’s Award).

    The annual competition seeks to identify and nurture talent in the field of radio wave technology and policy. Papers are submitted in various areas, including emerging radio technologies and future applications, 5G/6G policies, antennas, passive/active components, devices, and systems. This year’s competition involved a rigorous two-stage evaluation, with 19 finalists vying for the top honors.

    Award Details:

    • Encouragement Award
      • Title: Spatial Phase Shift Distribution for Blockage Effect Mitigation in RIS
      • Recipients: Dae-Hyun Kim, Young-No Yoon, and Won-Bin Hong
    • Excellence Award (KIEES President’s Award)
      • Title: Liquid Crystal-driven Reconfigurable Intelligent Surface with Cognitive Sensors for Self-Sustainable Operation
      • Recipients: Young-No Yoon, Dae-Hyun Kim, and Won-Bin Hong

    These awards highlight the innovative contributions of POSTECH researchers to cutting-edge technologies in electromagnetic waves and their applications.

  • Professor Rok-Hyun Baek Receives "Excellence Award" at the 11th Industry-Academia Research Project Outstanding Invention Awards Ceremony

    Professor Rok-Hyun Baek Receives “Excellence Award” at the 11th Industry-Academia Research Project Outstanding Invention Awards Ceremony

    Professor Rok-Hyun Baek from POSTECH’s Department of Electrical Engineering was awarded the Excellence Award on October 31, 2023, at the SK hynix headquarters in Icheon, South Korea. The award recognized his innovative contribution to improving semiconductor manufacturing productivity through his patented AI technology, which quantifies the optimal conditions for semiconductor devices (transistors).

    The awards ceremony was attended by key executives from SK hynix, including Vice Presidents Seon-Yong Cha (Head of Future Technology Research Institute), Yoon-Wook Kim (Head of Sustainability Management), and Yong-Soo Ha (Head of Intellectual Property), along with R&D Strategy Team Leader Joon-Soo Kim and five award recipients.

    This annual award program, established in 2013, evaluates patents filed as a result of SK hynix’s industry-academia collaboration projects, rewarding outstanding inventions. It aims to boost researchers’ morale and encourage the development of high-impact patents.

    Professor Baek’s achievement highlights the critical role of academia-industry collaboration in advancing cutting-edge semiconductor technologies.

  • Professor Moon-Joo Lee Publishes Cover Article in Applied Physics Letters

    Professor Moon-Joo Lee’s Research Featured as Cover Article in Applied Physics Letters

    A study conducted by Professor Moon-Joo Lee’s Quantum Computing and Quantum Networks Laboratory at POSTECH was published as a cover article in the October 16, 2023 issue of Applied Physics Letters (APL).

    The research demonstrated that exceptional points, one of the unique phenomena of open quantum systems, can be observed using ion trap qubits and optical cavities. This breakthrough highlights the potential of ion trap systems in advancing the understanding of complex quantum behaviors.

    Dr. Jin-Wook Kim (currently a postdoctoral researcher at Yale University) and Tae-Gyu Ha (an integrated PhD student) were the co-first authors of the study.

    Applied Physics Letters (APL), first published in 1962 by the American Institute of Physics, is a leading journal in the field of applied physics, known for its high academic standards and influence in the scientific community.

    This achievement further underscores POSTECH’s contribution to cutting-edge quantum research on a global scale.

  • Professor Kyung-Tae Kim’s Research Team Wins "Outstanding Paper Award" at the Korean Institute of Electromagnetic Engineering and Science (KIEES) Summer Conference

    Professor Kyung-Tae Kim’s Research Team Wins “Outstanding Paper Award” at the 2023 KIEES Summer Conference

    POSTECH Electrical Engineering students Min-Gon Cho (Master’s program), In-Hyuk Lee (PhD program), and Kyung-Min Lee (PhD program), under the supervision of Professor Kyung-Tae Kim, were awarded the Outstanding Paper Award at the 2023 Summer Conference of the Korean Institute of Electromagnetic Engineering and Science (KIEES). Their paper, titled “Study on SAR Image Super-Resolution Using Compressed Sensing,” was recognized for its academic excellence and innovative approach.

    The paper demonstrated a method to enhance image resolution by applying the Orthogonal Matching Pursuit (OMP) algorithm, a technique within compressed sensing, to increase the bandwidth of existing images. This approach was applied to SAR images captured by KOMPSAT-5, and the results showed improved azimuthal resolution, as verified through metrics such as PSLR, ISLR, and resolution. The academic contribution of this study was highly regarded at the conference.

  • Professor Moon-Joo Lee Selected for the National Research Foundation’s Quantum Technology R&D Leading Project

    Professor Moon-Joo Lee Selected for NRF Quantum Technology R&D Leading Project

    Professor Moon-Joo Lee from POSTECH’s Department of Electrical Engineering (Principal Investigator) has been selected for the Quantum Technology R&D Leading Project, titled “Generation of Multifunctional Neutral Atom Qubit Arrays,” organized by the National Research Foundation of Korea (NRF).

    Dr. Ki-Se Lee played a pivotal role in drafting the project proposal, which aims to develop and control multi-qubit arrays—a core technology for next-generation quantum computers and quantum networks. The project spans approximately three years (2+1) with a total funding of 1.1 billion KRW (600 million KRW for the first phase and 500 million KRW for the second).

    Professor Lee’s lab is expanding its research focus beyond ion trap qubit systems to neutral atom qubit systems, further advancing efforts in quantum computer development. This project is expected to make significant contributions to the field of quantum computing and related technologies.

  • Young-No Yoon (PhD Candidate) Selected for the 2023 IEEE Antennas and Propagation Society (AP-S) Fellowship Program

    Young-No Yoon (PhD Candidate) Becomes First Korean Recipient of the Prestigious IEEE Antennas and Propagation Society (AP-S) Fellowship Program

    Young-No Yoon, a PhD candidate in the Department of Electrical Engineering at POSTECH (advisor: Professor Won-Bin Hong), has been selected for the 2023 IEEE Antennas and Propagation Society (AP-S) Fellowship Program. This marks the first time a recipient from South Korea has been chosen for this distinguished fellowship.

    The IEEE AP-S Fellowship Program recognizes exceptional doctoral students and postdoctoral researchers worldwide who demonstrate outstanding research achievements and future potential. The program annually awards only a select few globally, making this recognition particularly significant.

    Yoon’s selection was based on the originality of his proposed research project, “Sustainable Cognitive Organic Reconfigurable Electronics (CORE),” as well as his extensive academic accomplishments, which include over 70 published papers and 10 awards at international and domestic conferences.

    The CORE project introduces a groundbreaking paradigm for intelligent surfaces that combine sensing and communication, featuring a self-sustainable feedback system. This interdisciplinary research integrates advancements in electromagnetics, display technology, circuit systems, and communication engineering, positioning Yoon’s work at the forefront of innovative research in the field.

  • Seong-Bin Kim (2023 Recipient, PhD Candidate) and Hyun-Woo Nam (2022 Recipient, PhD Candidate) Awarded SBS Cultural Foundation Scholarship for Two Consecutive Years

    Seong-Bin Kim (2023 Recipient) and Hyun-Woo Nam (2022 Recipient) Awarded SBS Cultural Foundation Scholarship – Two Consecutive Years 

    PhD candidates Seong-Bin Kim (2023 recipient) and Hyun-Woo Nam (2022 recipient) from the Department of Electrical Engineering at POSTECH (advisor: Professor Tae-Hyun Oh) have been honored with the prestigious SBS Cultural Foundation Scholarship. The award ceremony was held at the Taeyoung Building in Yeouido, Seoul. Due to pandemic-related delays, Hyun-Woo Nam’s 2022 award was presented alongside the 2023 recipients at this year’s event.

    Both students are members of the Machine Intelligence Lab, led by Professor Tae-Hyun Oh, marking an exceptional achievement of two consecutive years of recognition for the lab.

    This year, the SBS Cultural Foundation Scholarship attracted 394 applicants from domestic and international master’s and PhD programs, with only 15 selected as final recipients. The fellowship provides each student with financial support of approximately 100 million KRW over 5 years and 6 months, underscoring its significance in fostering top-tier research talent.

     

     

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  • Professor Yoon-Young Jung’s Research Team at POSTECH Wins "Outstanding Student Paper Award" at the IEIE Summer Conference

    POSTECH PhD Students Yong-Hoon Song and Yoon-Sik Kim Win “Outstanding Student Paper Award” at the 2023 IEIE Summer Conference

    PhD candidates Yong-Hoon Song and Yoon-Sik Kim from the Department of Electrical Engineering at POSTECH (advisor: Professor Yoon-Young Jung) received the Outstanding Student Paper Award at the 2023 Summer Conference of the Korean Institute of Electrical Engineers (IEIE). The conference took place from June 28 to June 30 at the Lotte Hotel in Jungmun, Jeju Island.

    Their paper, titled “Wearable Neck Microphone for Voice Measurement in Noisy Environments” (corresponding author: Professor Yoon-Young Jung), was recognized for its academic excellence.

    The research team developed a wearable neck microphone capable of isolating the wearer’s voice in noisy environments. By employing a real-time adaptive filter, they successfully eliminated internal noise inherent in MEMS devices. This technology holds significant potential for enabling clear communication in various high-noise environments, such as factories, military settings, and construction sites.

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