Frequency limitation of an optimum performance class-E power amplifier. - Nam Ha-Van; Ninh Dang-Duy; Hyoungjun Kim; Chulhun Seo (IEICE Electron. Express, 2016)

High-efficiency wireless power transfer by optimal load and metamaterial slab. - Nam Ha-Van; Ninh Dang-Duy; Hyoungjun Kim; Chulhun Seo (IEICE Electron. Express, 2017)