Realization of Gain Improvement Using Helix-Monopole Antenna for Two-Way Portable Radio. - Ying Liu 030; Antao Bu; Shuxi Gong; Hyengcheul Choi; Dongsoo Shin; Hyeongdong Kim (IEICE Trans. Commun., 2007)

Design of a Dual-Band Chip Antenna Using a Gap-Fed Branch. - Hyengcheul Choi; Hyeongdong Kim (IEICE Trans. Commun., 2009)

Planar Inverted-E (PIE) Antenna for a Wide Impedance Bandwidth. - Sinhyung Jeon; Hyengcheul Choi; Hyeongdong Kim (IEICE Trans. Commun., 2010)

Compact Hybrid DRA Combined with PIFA. - Junghwan Yeom; Sinhyung Jeon; Hyengcheul Choi; Hyeongdong Kim (IEICE Trans. Commun., 2010)

Internal Wideband Loop Antenna Using an LC Resonator. - Hyengcheul Choi; Hyeongdong Kim (IEICE Trans. Commun., 2011)

Miniaturized Antenna with High Radiation Efficiency Using Ground and Chip Capacitors. - Hyengcheul Choi; Kyung-Young Jung; Hyeongdong Kim (IEICE Trans. Commun., 2012)