Research

Dr. Yoo's research is broadly at the intersection of electromagnetics and wireless systems, encompassing a broad range of topics. Specifically, I have been pursuing electromagnetic-based interdisciplinary research on metamaterials, metasurfaces, and their modeling and design techniques for various wireless systems, including wireless communication, remote sensing, imaging, and power transfer systems.

Uh, wait a minute. If you're not familiar with the term "metamaterials", please visit this page and read a short introduction to the field. I'd describe metamaterials as artificially structured materials used to control and manipulate various wave phenomena. As you may have heard, they are also well-known for their applications, including invisibility cloak, negative refraction, perfect lens, etc.

In recent years, the research focus within the field of metamaterials has shifted towards metasurfaces, which are electrically thin layers of metamaterial scattering elements. Among various configurations, waveguide-fed metasurfaces have proven to be useful for constructing electrically large radiative platforms, and therefore, they have revolutionized various technology sectors associated with wireless systems.

This section will be updated soon. For those interested in exploring more details about our lab, here are some keywords--not an exhaustive list, though.

• Metasurfaces as radiative platforms for next-generation (6G) wireless communication systems (e.g., metasurfaces for extremely large-scale massive MIMO, reconfigurable intelligent surfaces, etc.)

• Metasurfaces as radiative platforms for SAR imaging, radar, and remote sensing applications.

• Metamaterials/metasurfaces for imaging applications.

PI's Current Research Projects (2024-present)

• "Wave-based Computing Metasurface Transceiver for Intelligent Extreme Large-scale Massive MIMO Communication Systems", funded by NRF (National Research Foundation of Korea), Outstanding Early Career Research Grant, 2025 (6G 지능형 Extreme Large-scale Massive MIMO 센싱 및 통신 시스템 구현을 위한 파동 기반 계산 메타표면 송수신기 연구, 우수신진연구, 한국 연구재단)

• "Building Korea-EU Collaborative Research Program for the Study of Machine-Learned Metasurfaces for Communication and Sensing in Next-Generation 6G D2D Communication LEO Inter-Satellite Link Backhaul Network (ISL) System", funded by NRF (National Research Foundation of Korea), 2024 (차세대 6G D2D 통신 저궤도 군집 위성 백홀 네트워크(ISL) 시스템의 통신 및 센싱용 극대규모 메타표면 및 기계학습 기반의 설계 기법 연구를 위한 한-EU 협력연구 구축, 한국 연구재단)

Most projects are externally funded by government or other sponsors, and the nature of funding may place constraints on research directions. However, our research group's basic approach is that we systematically connect the learned concepts in electromagnetics to identify and develop research ideas, employing interdisciplinary methods to further broaden our knowledge base.

Depending on your interests, you may choose to focus on developing a specific mathematical technique or different methods of simulations/experiments. Our group will provide support and resources to help advance your research. Following training, you will acquire knowledge, skill sets, and abilities to perform independent research.