The IMD cancellation characteristics of predistortion linearizer in microwave transistor. - Ung Hee Park; Kyung Hee Lee (ISCAS (4), 2003)

Wideband power divider using a coaxial cable 2: 1 transmission line transformer. - Ung Hee Park (IEICE Electron. Express, 2010)

Wideband balun using a transmission line transformer. - Ung Hee Park (IEICE Electron. Express, 2011)

A variable power divider with 1: 3 and 3: 1 power division ratios. - Ung Hee Park (IEICE Electron. Express, 2012)

Dual-impedance transmission line employing an ungrounded copper plane. - Ung Hee Park (IEICE Electron. Express, 2013)

A Wilkinson-Type Balun Using a Composite Right/Left-Handed Transmission Line. - Ung Hee Park (J. Inform. and Commun. Convergence Engineering, 2013)