Ryo Ishikawa

38 papers B 1Misc 1Journal 34Unranked 2
YearRankTypeTitle / Venue / Authors
2025 J jnl
Enhancing the Performance and Stability of a Dual Adaptive Biased Doherty Power Amplifier for 5G Mobile Handsets.
IEEE Access
Shohei Imai, Ryo Ishikawa, Hiroshi Okabe, Takaya Wada
2025 J jnl
Foreword.
IEICE Trans. Electron.
Ryo Ishikawa
2025 J jnl
Measurement of Vessel Shape for Estimating the Viscoelastic Properties of the Radial Artery under Ultrasound Probe Pressure.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Ryo Ishikawa, Shohei Mori, Mototaka Arakawa, Hiroshi Kanai
2025 J jnl
Performance Enhancement of Dual-Input Frequency-Periodic Load Modulated Power Amplifier at 1-5.7-GHz Bandwidth With Co-Designed Biasing Network.
IEEE Access
Takuma Torii, Yuji Komatsuzaki, Shintaro Shinjo, Ryo Ishikawa
2024 J jnl
A 2-GHz GaN HEMT Power Amplifier Harmonically Tuned Using a Compact One-Port CRLH Transmission Line.
IET Circuits Devices Syst.
Shinichi Tanaka, Ryota Mogami, Naoki Iisaka, Kazuhiko Honjo, Ryo Ishikawa
2024 B conf
ARIM-mdx Data System: Towards a Nationwide Data Platform for Materials Science.
IEEE Big Data
Masatoshi Hanai, Ryo Ishikawa, Mitsuaki Kawamura, Masato Ohnishi, Norio Takenaka, Kou Nakamura, Daiju Matsumura, Seiji Fujikawa, Hiroki Sakamoto, Yukinori Ochiai, Tetsuo Okane, Shin-Ichiro Kuroki, Atsuo Yamada, Toyotaro Suzumura, Kenjiro Taura, Yoshio Mita, Naoya Shibata, Yuichi Ikuhara
2024 J jnl
ARIM-mdx Data System: Towards a Nationwide Data Platform for Materials Science.
CoRR
Masatoshi Hanai, Ryo Ishikawa, Mitsuaki Kawamura, Masato Ohnishi, Norio Takenaka, Kou Nakamura, Daiju Matsumura, Seiji Fujikawa, Hiroki Sakamoto, Yukinori Ochiai, Tetsuo Okane, Shin-Ichiro Kuroki, Atsuo Yamada, Toyotaro Suzumura, Junichiro Shiomi, Kenjiro Taura, Yoshio Mita, Naoya Shibata, Yuichi Ikuhara
2024 J jnl
Analysis of Beamforming for OAM Communication Using Loop Antenna Arrays and Paraboloids.
IEICE Trans. Commun.
Akira Saitou, Kaito Uchida, Kanki Kitayama, Ryo Ishikawa, Kazuhiko Honjo
2023 J jnl
CNN-based fully automatic mitral valve extraction using CT images and existence probability maps.
CoRR
Yukiteru Masuda, Ryo Ishikawa, Toru Tanaka, Gakuto Aoyama, Keitaro Kawashima, James V. Chapman, Masahiko Asami, Michael Huy Cuong Pham, Klaus Fuglsang Kofoed, Takuya Sakaguchi, Kiyohide Satoh
2023 Misc conf
Cloud Data Acquisition from Shared-Use Facilities in A University-Scale Laboratory Information Management System.
UCC
Masatoshi Hanai, Mitsuaki Kawamura, Ryo Ishikawa, Toyotaro Suzumura, Kenjiro Taura
2022 J jnl
Pattern Synthesis of Spatial Eigenmodes Exploiting Spherical Conformal Array.
IEICE Trans. Commun.
Akira Saitou, Ryo Ishikawa, Kazuhiko Honjo
2021 J jnl
Doherty Amplifier Design Based on Asymmetric Configuration Scheme.
IEICE Trans. Electron.
Ryo Ishikawa, Yoichiro Takayama, Kazuhiko Honjo
2020 J jnl
Adaptive Voxel Matching for Temporal CT Subtraction.
J. Digit. Imaging
Toru Tanaka, Ryo Ishikawa, Keita Nakagomi, Kazuhiro Miyasa, Kiyohide Satoh, Masahiro Yakami, Thai Akasaka, Koji Onoue, Takeshi Kubo, Mizuho Nishio, Yutaka Emoto, Kaori Togashi
2019 J jnl
Class-F GaN HEMT Amplifiers Using Compact CRLH Harmonic Tuning Stubs Designed Based on Negative Order Resonance Modes.
IEICE Trans. Electron.
Shinichi Tanaka, Sota Koizumi, Ryo Ishikawa, Kazuhiko Honjo
2019 J jnl
High Performance OAM Communication Exploiting Port-Azimuth Effect of Loop Antennas.
IEICE Trans. Commun.
Hiroto Otsuka, Ryohei Yamagishi, Akira Saitou, Hiroshi Suzuki, Ryo Ishikawa, Kazuhiko Honjo
2018 J jnl
4.5-/4.9-GHz-Band Selective High-Efficiency GaN HEMT Power Amplifier by Characteristic Impedance Switching.
IEICE Trans. Electron.
Kazuki Mashimo, Ryo Ishikawa, Kazuhiko Honjo
2018 J jnl
83nJ/bit Transmitter Using Code-Modulated Synchronized-OOK on 65nm SOTB for Normally-Off Wireless Sensor Networks.
IEICE Trans. Electron.
Van-Trung Nguyen, Ryo Ishikawa, Koichiro Ishibashi
2017 J jnl
Microwave Characteristics of an Independently Biased 3-Stack InGaP/GaAs HBT Configuration.
IEEE Trans. Circuits Syst. I Regul. Pap.
Manh Duy Luong, Ryo Ishikawa, Yoichiro Takayama, Kazuhiko Honjo
2016 J jnl
Experimental Design Method for High-Efficiency Microwave Power Amplifiers Based on a Low-Frequency Active Harmonic Load-Pull Technique.
IEICE Trans. Electron.
Ryo Ishikawa, Yoichiro Takayama, Kazuhiko Honjo
2016 J jnl
Miniature Design Technique of Stabilized C-Band p-HEMT MMIC Doherty Power Amplifier with Lumped Element Load Modulator.
IEICE Trans. Electron.
Tsuyoshi Yoshida, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo
2016 J jnl
Miniaturization of Double Stub Resonators Using Lumped-Element Capacitors for MMIC Applications.
IEICE Trans. Electron.
Shinichi Tanaka, Takao Katayose, Hiroki Nishizawa, Ken'ichi Hosoya, Ryo Ishikawa, Kazuhiko Honjo
2016 J jnl
Novel Design of Dual-Band Reconfigurable Dipole Antenna Using Lumped and Distributed Elements.
IEICE Trans. Commun.
Shoichi Onodera, Ryo Ishikawa, Akira Saitou, Kazuhiko Honjo
2015 J jnl
Digital Spatial Modulation Using Dual Scatterers Embedded with Switches for Wireless Power Transmission Applications.
IEICE Trans. Electron.
Kohei Hasegawa, Ryo Ishikawa, Akira Saitou, Kazuhiko Honjo
2014 J jnl
A High-Efficiency Low-Distortion Cascode Power Amplifier Consisting of Independently Biased InGaP/GaAs HBTs.
IEICE Trans. Electron.
Yuki Takagi, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo
2013 J jnl
Breast MR Image Fusion by Deformable Implicit Polynomial (DIP).
Inf. Media Technol.
Bo Zheng, Ryo Ishikawa, Jun Takamatsu, Katsushi Ikeuchi, Takaaki Endo, Kiyohide Sato, Takayuki Ueno, Tomoharu Sugie, Masakazu Toi, Shotaro Kanao, Kaori Togashi
2013 J jnl
Spatially Modulated Communication Method Using Dual Scatterers Embedded with Lumped Elements for Wireless Power Transmission.
IEICE Trans. Commun.
Akira Saitou, Kohei Hasegawa, Ryo Ishikawa, Kazuhiko Honjo
2011 J jnl
A Predistortion Diode Linearizer Technique with Automatic Average Power Bias Control for a Class-F GaN HEMT Power Amplifier.
IEICE Trans. Electron.
Akihiro Ando, Yoichiro Takayama, Tsuyoshi Yoshida, Ryo Ishikawa, Kazuhiko Honjo
2011 J jnl
UWB Active Balun Design with Small Group Delay Variation and Improved Return Loss.
IEICE Trans. Electron.
Kyoung-Pyo Ahn, Ryo Ishikawa, Kazuhiko Honjo
2010 J jnl
Distortion Compensation for Thermal Memory Effect on InGaP/GaAs HBT Amplifier by Inserting
IEICE Trans. Electron.
Ryo Ishikawa, Junichi Kimura, Yukio Takahashi, Kazuhiko Honjo
2009 J jnl
A Fast Registration Method Using IP and Its Application to Ultrasound Image Registration.
Inf. Media Technol.
Bo Zheng, Ryo Ishikawa, Takeshi Oishi, Jun Takamatsu, Katsushi Ikeuchi
2009 J jnl
Synthesis for Negative Group Delay Circuits Using Distributed and Second-Order RC Circuit Configurations.
IEICE Trans. Electron.
Kyoung-Pyo Ahn, Ryo Ishikawa, Akira Saitou, Kazuhiko Honjo
2008 J jnl
InGaP/GaAs HBT MMIC Amplifier with Low Power Consumption and Low Noise Characteristics for Full-Band UWB Receiver Systems.
IEICE Trans. Electron.
Ryo Ishikawa, Takuya Abe, Kazuhiko Honjo, Masao Shimada
2007 J jnl
Accurate Distortion Prediction for Thermal Memory Effect in Power Amplifier Using Multi-Stage Thermal RC-Ladder Network.
IEICE Trans. Electron.
Yukio Takahashi, Ryo Ishikawa, Kazuhiko Honjo
2007 J jnl
Evaluation of Information Leakage from PC Displays Using Spectrum Analyzers.
IEICE Trans. Commun.
Toshihide Tosaka, Yukio Yamanaka, Kaori Fukunaga, Ryo Ishikawa, Mitsuo Hattori
2006 — conf
Finite Element Analysis and Experimental Study on Mechanism of Brain Injury Using Brain Model.
EMBC
Ryo Ishikawa, Kazuo Kato, Mitsunori Kubo, Takeo Uzuka, Hideaki Takahashi
2006 J jnl
InGaP/GaAs HBT MMIC Amplifier with Active Balun for Ultra-Wideband Self-Complementary Antenna.
IEICE Trans. Electron.
Itaru Nakagawa, Ryo Ishikawa, Kazuhiko Honjo, Masao Shimada
2006 J jnl
Microwave Class-F InGaP/GaAs HBT Power Amplifier Considering up to 7th-Order Higher Harmonic Frequencies.
IEICE Trans. Electron.
Masato Seki, Ryo Ishikawa, Kazuhiko Honjo
2001 — conf
Speech recognition technology combined with three-dimensional lip movement.
Three-Dimensional Image Capture and Applications
Kazumi Komiya, Ryo Ishikawa, Keiko Momose