Koji Yamanaka

发表

A highly integrated RF frontend module including Doherty PA, LNA and switch for high SHF wide-band massive MIMO in 5G

Keigo Nakatani, Yuji Komatsuzaki, Shintaro Shinjo, 2017, 2017 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR).

A fully analog two-way sequential GaN power amplifier with 40% fractional bandwidth

Shintaro Shinjo, Koji Yamanaka, Rui Ma, 2015, 2015 IEEE International Wireless Symposium (IWS 2015).

A Large-Signal Simulation Program for Multi-Stage Power Amplifier Modules by Using a Novel Interpolation

Koji Yamanaka, Kazutomi Mori, Tadashi Takagi, 2001, 2001 31st European Microwave Conference.

30W output / 60% PAE GaN power amplifier at X-band 8% relative bandwidth

Koji Yamanaka, Masatake Hangai, Yoshifumi Kawamura, 2016, 2016 Asia-Pacific Microwave Conference (APMC).

A 2.6-GHz-band 78-W Doherty power amplifier with GaN HEMT unit-cell structure robust for layout-dependent loop oscillation

Yuji Komatsuzaki, Shintaro Shinjo, Koji Yamanaka, 2016, 2016 11th European Microwave Integrated Circuits Conference (EuMIC).

Active Suppression of Disturbance Induced by Satellite-Mounted Instruments Using Magnetic Bearing Actuator

Koji Yamanaka, Shuhei Shigeto, Takuya Kanzawa, 2015 .

A concurrent triple-band digital transmitter using feedforward noise cancellation for delta-sigma modulation

Shintaro Shinjo, Koji Yamanaka, SungWon Chung, 2017, 2017 12th European Microwave Integrated Circuits Conference (EuMIC).

High-Agility, Miniaturized Attitude Control Sensors and Actuators in an All-in-one Module

Koji Yamanaka, Shinji Mitani, Shuhei Shigeto, 2016 .

C-Ku band ultra broadband GaN MMIC amplifier with 20W output power

Koji Yamanaka, Yoshitaka Kamo, Masatoshi Nakayama, 2011, Asia-Pacific Microwave Conference 2011.

A Fully-Integrated GaN Doherty Power Amplifier Module with a Compact Frequency-Dependent Compensation Circuit for 5G massive MIMO Base Stations

Yuji Komatsuzaki, Shintaro Shinjo, Koji Yamanaka, 2020, 2020 IEEE/MTT-S International Microwave Symposium (IMS).

FPGA implemented multi-level IFPWM power coding for class-S PA in an all-digital GHz LTE transmitter

Chunjie Duan, Koji Yamanaka, Rui Ma, 2014, 2014 IEEE International Wireless Symposium (IWS 2014).

120-W Ku-Band GaN SSPA with Diode Linearizer for Future Broadcasting Satellites

Shintaro Shinjo, Koji Yamanaka, Mitsuhiro Shimozawa, 2019, IEICE Trans. Electron..

16APSK transmission experiments over 12GHz-band satellite with 100W class GaN power amplifier

Koji Yamanaka, Shoji Tanaka, Masaaki Kojima, 2016, 2016 Asia-Pacific Microwave Conference (APMC).

Advanced experiments on Field-Reversed Configuration at Osaka

Koji Yamanaka, Satoshi Sugimoto, S. Goto, 1998 .

A 0.85 – 2.7 GHz two-cell distributed GaN power amplifier designed for high efficiency at 1-dB compression

Shintaro Shinjo, Koji Yamanaka, Christer M. Andersson, 2015, 2015 European Microwave Conference (EuMC).

A Ku-band 100 W power amplifier under CW operation utilizing 0.15 µm GaN HEMT technology

Koji Yamanaka, Shoji Tanaka, Masafumi Nagasaka, 2016, 2016 Asia-Pacific Microwave Conference (APMC).

A High Efficiency 3.6-4.0 GHz Envelope-Tracking Power Amplifier Using GaN Soft-Switching Buck-Converter

Yuji Komatsuzaki, Shintaro Shinjo, Koji Yamanaka, 2018, 2018 IEEE/MTT-S International Microwave Symposium - IMS.

3.0–3.6 GHz wideband, over 46% average efficiency GaN Doherty power amplifier with frequency dependency compensating circuits

Keigo Nakatani, Yuji Komatsuzaki, Shintaro Shinjo, 2017, 2017 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR).

Mitsubishi Electric's GaN devices employed in infrastructure systems

Koji Yamanaka, 2014, 2014 Asia-Pacific Microwave Conference.

Evaluation of baseball pitching form by ground reaction force measurement and video analysis

Kiyoshi Nosu, Koji Yamanaka, Yuichi Yabuzaki, 2009, J. Vis..

Recent Activities of Japanese Microwave Industry

Koji Yamanaka, Atsushi Honda, Shoichi Narahashi, 2015, IEICE Trans. Electron..

A Real-Time Architecture for Agile and FPGA-Based Concurrent Triple-Band All-Digital RF Transmission

Shintaro Shinjo, Koji Yamanaka, Daniel C. Dinis, 2018, IEEE Transactions on Microwave Theory and Techniques.

A high power and low loss GaN HEMT MMIC T/R switch utilizing band-pass/low-pass configuration

Ryota Komaru, Koji Yamanaka, Masatake Hangai, 2014, 2014 44th European Microwave Conference.

On the Large Signal Evaluation and Modeling of GaN FET

Koji Yamanaka, Akira Inoue, Mattias Thorsell, 2010, IEICE Trans. Electron..

Highly integrated RF frontend module for high SHF wide-band massive MIMO in 5G, and switching-mode amplifiers beyond 4G

Keigo Nakatani, Shintaro Shinjo, Jun Kamioka, 2017, 2017 International Symposium on VLSI Design, Automation and Test (VLSI-DAT).

A broadband Rx band noise reduction circuit with CMOS switch for multi-band power amplifier

Shintaro Shinjo, Koji Yamanaka, Morishige Hieda, 2015, 2015 IEEE Radio and Wireless Symposium (RWS).

A 28GHz-band highly integrated GaAs RF frontend Module for Massive MIMO in 5G

Akihiro Okazaki, Keigo Nakatani, Shintaro Shinjo, 2018, 2018 IEEE MTT-S International Microwave Workshop Series on 5G Hardware and System Technologies (IMWS-5G).

An S-band 240 W output / 54 % PAE GaN power amplifier with broadband output matching network for both fundamental and 2nd harmonic frequencies

Koji Yamanaka, Masatake Hangai, Naoki Kosaka, 2016, 2016 IEEE MTT-S International Microwave Symposium (IMS).

A 40-dBm high voltage broadband GaN Class-J power amplifier for PoE micro-basestations

Yuji Komatsuzaki, Koji Yamanaka, Sushmit Goswami, 2013, 2013 IEEE MTT-S International Microwave Symposium Digest (MTT).

A packaged 86 W GaN transmitter with SiC varactor-based dynamic load modulation

Koji Yamanaka, Christian Fager, Niklas Rorsman, 2013, 2013 European Microwave Conference.

C-Ku band 120% relative bandwidth high efficiency high power amplifier using GaN HEMT

Koji Yamanaka, Yoshihito Hirano, Tasuku Kirikoshi, 2009, 2009 Asia Pacific Microwave Conference.

A CW 20W Ka-band GaN high power MMIC amplifier with a gate pitch designed by using one-finger large signal models

Shintaro Shinjo, Jun Kamioka, Koji Yamanaka, 2017, 2017 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS).

Internally-matched GaN HEMT high efficiency power amplifier for SPS

Naoki Shinohara, Koji Yamanaka, Shin Chaki, 2011, 2011 IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications.

An 80-W packaged GaN high power amplifier for CW operation in the 13.75–14.5 GHz band

Koji Yamanaka, Shohei Imai, Hiroaki Maehara, 2014, 2014 IEEE MTT-S International Microwave Symposium (IMS2014).

A dual-gain-mode high efficiency power amplifier for W-CDMA data communications

Shintaro Shinjo, Koji Yamanaka, Kazuya Yamamoto, 2014, 2014 Asia-Pacific Microwave Conference.

GaN HEMT high efficiency amplifier for Microwave Wireless Power Transmission

Koji Yamanaka, Masatake Hangai, Yutaro Yamaguchi, 2015, 2015 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT).

60% PAE, 30W X-band and 33% PAE, 100W Ku-band PAs utilizing 0.15 μm GaN HEMT technology

Koji Yamanaka, Tetsuo Kunii, Hideaki Katayama, 2016, 2016 46th European Microwave Conference (EuMC).

Microwave and Millimeter-Wave GaN Amplifiers for Satellite Communications

Keigo Nakatani, Shintaro Shinjo, Koji Yamanaka, 2018, 2018 Asia-Pacific Microwave Conference (APMC).

Internally matched GaN FET at C-band with 220W output power and 56% power added efficiency

Koji Yamanaka, Hiromitsu Uchida, M. Nakayama, 2012, 2012 Asia Pacific Microwave Conference Proceedings.

A Ka-Band High Efficiency Doherty Power Amplifier MMIC using GaN-HEMT for 5G Application

Keigo Nakatani, Yuji Komatsuzaki, Shintaro Shinjo, 2018, 2018 IEEE MTT-S International Microwave Workshop Series on 5G Hardware and System Technologies (IMWS-5G).