A Predistortion Diode Linearizer Technique with Automatic Average Power Bias Control for a Class-F GaN HEMT Power Amplifier. - Akihiro Ando; Yoichiro Takayama; Tsuyoshi Yoshida; Ryo Ishikawa; Kazuhiko Honjo (IEICE Trans. Electron., 2011)

A High-Efficiency Low-Distortion Cascode Power Amplifier Consisting of Independently Biased InGaP/GaAs HBTs. - Yuki Takagi; Yoichiro Takayama; Ryo Ishikawa; Kazuhiko Honjo (IEICE Trans. Electron., 2014)

Experimental Design Method for High-Efficiency Microwave Power Amplifiers Based on a Low-Frequency Active Harmonic Load-Pull Technique. - Ryo Ishikawa; Yoichiro Takayama; Kazuhiko Honjo (IEICE Trans. Electron., 2016)

Miniature Design Technique of Stabilized C-Band p-HEMT MMIC Doherty Power Amplifier with Lumped Element Load Modulator. - Tsuyoshi Yoshida; Yoichiro Takayama; Ryo Ishikawa; Kazuhiko Honjo (IEICE Trans. Electron., 2016)

Microwave Characteristics of an Independently Biased 3-Stack InGaP/GaAs HBT Configuration. - Manh Duy Luong; Ryo Ishikawa; Yoichiro Takayama; Kazuhiko Honjo (IEEE Trans. Circuits Syst. I Regul. Pap., 2017)

Doherty Amplifier Design Based on Asymmetric Configuration Scheme. - Ryo Ishikawa; Yoichiro Takayama; Kazuhiko Honjo (IEICE Trans. Electron., 2021)