Title: Microwave and Millimeter-wave Metamaterial RF Components for 5G Mobile and NTN-Compliant Satellite Antennas
Abstract
As the generation of mobile communication is moving on, the industry has kept presenting a solid demand on quality wireless systems. This leads to quality antennas conformable to tougher requirements such as new frequency bands, form factors and SWPC. Admitting a lot of efforts are made to develop viable RF components and antennas in the microwave regime, it is harder to make them satisfying the mobile user requirement specifications for millimeter-wave bands. This results from increase in loss by materials of the components and aggravation in path loss measured from the antenna aperture. To compensate for the losses, 5G system developers cannot help considering increase in the injected power which ends up with higher DC power consumption. These shortcomings are pulling the developers’ legs. Additionally, in the 6th generation of mobile communication, LEO satellites are expected to play a role of aerial relays for faster and expanded on-the-ground networking services, which imposes a big challenge of much longer signal paths on the researchers dealing with problems of severe path loss vs. several hundreds of kilometers. To relieve the system guys of a fragment of the problems, metamaterial RF components and antennas are designed, the former of which experience lower loss despite using the same materials and the latter of which generate higher antenna directivity without change in the size of the radiating aperture. This talk introduces RF components such as TX-lines, transitions, filters, MUXes, power-dividers, etc. realized as metamaterial versions that are shorter and lower insertion loss in the target frequency band. Besides, the array antennas which suffer from dielectric and conductor losses and imbalance in amplitudes and phases are replaced by metasurfaces such as flat lenses. Components and antennas for the objectives are separated or combined with each other for more advantages. Design examples aimed at microwave and millimeter-wave wireless services are presented along with measurement from far-field to near-field regions.
Short Biography
Prof. Sungtek Kahng received his Ph.D. degree from Hanyang University, Korea in 2000, with a specialty in Radio Science and Engineering. From 2000 to 2004, he worked for the Electronics and Telecommunication Research Institute(briefly, ETRI), and developed Satellite Payloads of GEOs, Computational EM methods and Electromagnetic Field Measurement Techniques. Currently, in Dept. of Info. & Telecomm. Eng. of Incheon National University, he works on WPT devices, PD sensors, EMI/EMC, RF components for UAM Radars and satellites, smart antennas for 5G/IoT networking. He in the committee evaluating Korean Satellite Development Programs appointed by NRF has cooperated mainly with LGE, LIGNEX1, ETRI, KARI, ADD, CAMM, Corning(USA), Samsung, AceTechnology, Hyundai, Amotech, Innertron, and NISSHA(Japan) where he holds a fellow position. Along with roles of IEEE APS STC judge, IEEE APS TC Antenna Measurements, KICS Vice President, KIEE Journal Editor, etc., he served as the ICCR 2022 TPC Chair, Chair of LOC for ICEE 2026 and General Chair for IEEE APCAP 2019. Presently, he is the director of Korean Mistry of Science and IT funded National Research and Development Center on 6G Radio and Satellite Communication Technologies named ITRC.
