Ryo Ishikawa

According to our database, Ryo Ishikawa authored at least 33 papers between 2001 and 2024.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of three.

2024

A 2-GHz GaN HEMT Power Amplifier Harmonically Tuned Using a Compact One-Port CRLH Transmission Line.

Shinichi Tanaka, Ryota Mogami, Naoki Iisaka, Kazuhiko Honjo, Ryo Ishikawa

IET Circuits Devices Syst., 2024

Analysis of Beamforming for OAM Communication Using Loop Antenna Arrays and Paraboloids.

Akira Saitou, Kaito Uchida, Kanki Kitayama, Ryo Ishikawa, Kazuhiko Honjo

IEICE Trans. Commun., 2024

ARIM-mdx Data System: Towards a Nationwide Data Platform for Materials Science.

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

CoRR, 2024

2023

CNN-based fully automatic mitral valve extraction using CT images and existence probability maps.

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

CoRR, 2023

Cloud Data Acquisition from Shared-Use Facilities in A University-Scale Laboratory Information Management System.

Masatoshi Hanai, Mitsuaki Kawamura, Ryo Ishikawa, Toyotaro Suzumura, Kenjiro Taura

Proceedings of the IEEE/ACM 16th International Conference on Utility and Cloud Computing, 2023

2022

Pattern Synthesis of Spatial Eigenmodes Exploiting Spherical Conformal Array.

Akira Saitou, Ryo Ishikawa, Kazuhiko Honjo

IEICE Trans. Commun., October, 2022

2021

Doherty Amplifier Design Based on Asymmetric Configuration Scheme.

Ryo Ishikawa, Yoichiro Takayama, Kazuhiko Honjo

IEICE Trans. Electron., 2021

2020

Adaptive Voxel Matching for Temporal CT Subtraction.

Toru Tanaka, Ryo Ishikawa, Keita Nakagomi, Kazuhiro Miyasa, Kiyohide Satoh, Masahiro Yakami, Thai Akasaka, Koji Onoue, Takeshi Kubo, Mizuho Nishio, Yutaka Emoto, Kaori Togashi

J. Digit. Imaging, 2020

2019

Class-F GaN HEMT Amplifiers Using Compact CRLH Harmonic Tuning Stubs Designed Based on Negative Order Resonance Modes.

Shinichi Tanaka, Sota Koizumi, Ryo Ishikawa, Kazuhiko Honjo

IEICE Trans. Electron., 2019

High Performance OAM Communication Exploiting Port-Azimuth Effect of Loop Antennas.

Hiroto Otsuka, Ryohei Yamagishi, Akira Saitou, Hiroshi Suzuki, Ryo Ishikawa, Kazuhiko Honjo

IEICE Trans. Commun., 2019

2018

83nJ/bit Transmitter Using Code-Modulated Synchronized-OOK on 65nm SOTB for Normally-Off Wireless Sensor Networks.

Van-Trung Nguyen, Ryo Ishikawa, Koichiro Ishibashi

IEICE Trans. Electron., 2018

4.5-/4.9-GHz-Band Selective High-Efficiency GaN HEMT Power Amplifier by Characteristic Impedance Switching.

Kazuki Mashimo, Ryo Ishikawa, Kazuhiko Honjo

IEICE Trans. Electron., 2018

2017

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

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

Miniaturization of Double Stub Resonators Using Lumped-Element Capacitors for MMIC Applications.

Shinichi Tanaka, Takao Katayose, Hiroki Nishizawa, Ken'ichi Hosoya, Ryo Ishikawa, Kazuhiko Honjo

IEICE Trans. Electron., 2016

Novel Design of Dual-Band Reconfigurable Dipole Antenna Using Lumped and Distributed Elements.

Shoichi Onodera, Ryo Ishikawa, Akira Saitou, Kazuhiko Honjo

IEICE Trans. Commun., 2016

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

2015

Digital Spatial Modulation Using Dual Scatterers Embedded with Switches for Wireless Power Transmission Applications.

Kohei Hasegawa, Ryo Ishikawa, Akira Saitou, Kazuhiko Honjo

IEICE Trans. Electron., 2015

2014

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

2013

Breast MR Image Fusion by Deformable Implicit Polynomial (DIP).

Bo Zheng, Ryo Ishikawa, Jun Takamatsu, Katsushi Ikeuchi, Takaaki Endo, Kiyohide Sato, Takayuki Ueno, Tomoharu Sugie, Masakazu Toi, Shotaro Kanao, Kaori Togashi

Inf. Media Technol., 2013

Spatially Modulated Communication Method Using Dual Scatterers Embedded with Lumped Elements for Wireless Power Transmission.

Akira Saitou, Kohei Hasegawa, Ryo Ishikawa, Kazuhiko Honjo

IEICE Trans. Commun., 2013

2011

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

UWB Active Balun Design with Small Group Delay Variation and Improved Return Loss.

Kyoung-Pyo Ahn, Ryo Ishikawa, Kazuhiko Honjo

IEICE Trans. Electron., 2011

2010

Distortion Compensation for Thermal Memory Effect on InGaP/GaAs HBT Amplifier by Inserting <i>RC</i>-Ladder Circuit in Base Bias Circuit.

Ryo Ishikawa, Junichi Kimura, Yukio Takahashi, Kazuhiko Honjo

IEICE Trans. Electron., 2010

2009

A Fast Registration Method Using IP and Its Application to Ultrasound Image Registration.

Bo Zheng, Ryo Ishikawa, Takeshi Oishi, Jun Takamatsu, Katsushi Ikeuchi

Inf. Media Technol., 2009

Synthesis for Negative Group Delay Circuits Using Distributed and Second-Order RC Circuit Configurations.

Kyoung-Pyo Ahn, Ryo Ishikawa, Akira Saitou, Kazuhiko Honjo

IEICE Trans. Electron., 2009

2008

InGaP/GaAs HBT MMIC Amplifier with Low Power Consumption and Low Noise Characteristics for Full-Band UWB Receiver Systems.

Ryo Ishikawa, Takuya Abe, Kazuhiko Honjo, Masao Shimada

IEICE Trans. Electron., 2008

2007

Evaluation of Information Leakage from PC Displays Using Spectrum Analyzers.

Toshihide Tosaka, Yukio Yamanaka, Kaori Fukunaga, Ryo Ishikawa, Mitsuo Hattori

IEICE Trans. Commun., 2007

Accurate Distortion Prediction for Thermal Memory Effect in Power Amplifier Using Multi-Stage Thermal RC-Ladder Network.

Yukio Takahashi, Ryo Ishikawa, Kazuhiko Honjo

IEICE Trans. Electron., 2007

2006

Microwave Class-F InGaP/GaAs HBT Power Amplifier Considering up to 7th-Order Higher Harmonic Frequencies.

Masato Seki, Ryo Ishikawa, Kazuhiko Honjo

IEICE Trans. Electron., 2006

InGaP/GaAs HBT MMIC Amplifier with Active Balun for Ultra-Wideband Self-Complementary Antenna.

Itaru Nakagawa, Ryo Ishikawa, Kazuhiko Honjo, Masao Shimada

IEICE Trans. Electron., 2006

Finite Element Analysis and Experimental Study on Mechanism of Brain Injury Using Brain Model.

Ryo Ishikawa, Kazuo Kato, Mitsunori Kubo, Takeo Uzuka, Hideaki Takahashi

Proceedings of the 28th International Conference of the IEEE Engineering in Medicine and Biology Society, 2006

2001

Speech recognition technology combined with three-dimensional lip movement.

Kazumi Komiya, Ryo Ishikawa, Keiko Momose

Proceedings of the Conference on Three-Dimensional Image Capture and Applications IV, 2001