Sampling phase detector using a resonant tunneling high electron mobility transistor for microwave phase-locked oscillators. - Hiroshi Okazaki; Tadao Nakagawa; Masahiro Muraguchi; Hiroyuki Fukuyama; Koichi Maezawa; Masafumi Yamamoto (IEEE Trans. Very Large Scale Integr. Syst., 1998)

A novel oscillation circuit using a resonant-tunneling diode. - Naokazu Muramatsu; Hiroshi Okazaki; Takao Waho (ISCAS (3), 2005)

Novel Band-Reconfigurable High Efficiency Power Amplifier Employing RF-MEMS Switches. - Atsushi Fukuda; Hiroshi Okazaki; Tetsuo Hirota; Yasushi Yamao (IEICE Trans. Electron., 2005)

Highly Efficient Multi-Band Power Amplifier Employing Reconfigurable Matching and Biasing Networks. - Atsushi Fukuda; Hiroshi Okazaki; Shoichi Narahashi (IEICE Trans. Electron., 2010)

Compact 1.5GHz to 2.5GHz multi-band multi-mode power amplifier. - Takayuki Furuta; Atsushi Fukuda; Kunihiro Kawai; Hiroshi Okazaki; Shoichi Narahashi (IEICE Electron. Express, 2011)

Detailed Analysis of Multilayer Broad-Side Coupler with a Symmetric Structure. - Hiroshi Okazaki; Kiyomichi Araki (IEICE Trans. Electron., 2011)

Low-Loss Matching Network Design for Band-Switchable Multi-Band Power Amplifier. - Atsushi Fukuda; Takayuki Furuta; Hiroshi Okazaki; Shoichi Narahashi; Toshio Nojima (IEICE Trans. Electron., 2012)

Compact wideband rat-race hybrid utilizing composite right/left-handed transmission lines. - Yuma Sumitomo; Tadashi Kawai; Akira Enokihara; Isao Ohta; Kei Satoh; Yasunori Suzuki; Hiroshi Okazaki; Shoichi Narahashi (RWS, 2013)

Compact Tunable Isolator with a Variable Capacitor. - Takayuki Furuta; Atsushi Fukuda; Hiroshi Okazaki; Shoichi Narahashi (IEICE Trans. Electron., 2013)

Tunable Resonator Employing Comb-shaped Transmission Line and Semiconductor Switches. - Kunihiro Kawai; Daisuke Koizumi; Hiroshi Okazaki; Shoichi Narahashi (IEICE Trans. Electron., 2014)

Parallel Ring-Line Rat-Race Circuit with Very Loose Coupling Utilizing Composite Right-/Left-Handed Transmission Lines. - Tadashi Kawai; Yuma Sumitomo; Akira Enokihara; Isao Ohta; Kei Satoh; Yasunori Suzuki; Hiroshi Okazaki; Shoichi Narahashi (IEICE Trans. Electron., 2014)

A novel beam control method and configuration for phased array antenna system employing frequency-upconverted local signals with phase difference. - Atsushi Fukuda; Hiroshi Okazaki; Shoichi Narahashi (RWS, 2016)

26 GHz Band Extremely Low-Profile Front-End Configuration Employing Integrated Modules of Patch Antennas and SIW Filters. - Yasunori Suzuki; Takana Kaho; Kei Satoh; Hiroshi Okazaki; Maki Arai; Yo Yamaguchi; Shoichi Narahashi; Hiroyuki Shiba (IEICE Trans. Electron., 2017)

Theoretical Analysis of Center Frequency and Bandwidth Tunable Resonator Employing Coupled Line and Switches. - Kunihiro Kawai; Hiroshi Okazaki; Shoichi Narahashi; Mizuki Motoyoshi; Noriharu Suematsu (IEICE Trans. Electron., 2019)

Resonant Frequency and Bandwidth Tunable Ring Resonator Using GaAs FET SPST Switches. - Kunihiro Kawai; Hiroshi Okazaki; Shoichi Narahashi; Noriharu Suematsu (IEICE Trans. Electron., 2019)

Foreword. - Hiroshi Okazaki (IEICE Trans. Electron., 2020)

IMD Components Compensation Conditions for Dual-Band Feed-Forward Power Amplifier. - Yasunori Suzuki; Hiroshi Okazaki; Shoichi Narahashi (IEICE Trans. Electron., 2020)

Rectifier Circuit using High-Impedance Feedback Line for Microwave Wireless Power Transfer Systems. - Seiya Mizuno; Ryosuke Kashimura; Tomohiro Seki; Maki Arai; Hiroshi Okazaki; Yasunori Suzuki (IEICE Trans. Electron., 2021)

A Design of InP-HBT 100-GHz Diode Linearizer Toward 6G. - Sumire Aoki; Hiroshi Hamada; Hiroto Yamamoto; Atsushi Fukuda; Teruo Jyo; Hiroyuki Takahashi; Hiroshi Okazaki; Yasunori Suzuki (APCC, 2022)

Wideband Single Carrier Transmitter Configuration Equalizing Non-flat Frequency Response. - Hiroto Yamamoto; Atsushi Fukuda; Sumire Aoki; Hiroshi Hamada; Hiroshi Okazaki; Yasunori Suzuki (APCC, 2022)

THz Transport Technologies and Strategists Beyond 5G/6G Systems. - Hiroshi Okazaki; Yasunori Suzuki; Satoshi Suyama; Takahiro Asai (OFC, 2022)

Novel Configuration for Phased-Array Antenna System Employing Frequency-Controlled Beam Steering Method. - Atsushi Fukuda; Hiroshi Okazaki; Shoichi Narahashi (IEICE Trans. Electron., 2022)