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Ryo Ishikawa

Observed names: ISHIKAWA, Ryo, R. Ishikawa, Ryo ISHIKAWA, Ryo Isikawa
ORCID: 0000-0002-7532-1664
Observed ORCID: 0000-0002-7532-1664
OpenAlex ID: A5102723865
Group Delay Equalized UWB InGaP/GaAs HBT MMIC Amplifier Using Negative Group Delay Circuits
2009 · Kyoung-Pyo Ahn, R. Ishikawa, et al. · IEEE Transactions on Microwave Theory and Techniques · 88
5.65 GHz High-Efficiency GaN HEMT Power Amplifier With Harmonics Treatment up to Fourth Order
2012 · M. Kamiyama, R. Ishikawa, et al. · IEEE Microwave and Wireless Components Letters · 50
A Miniature Broadband Doherty Power Amplifier With a Series-Connected Load
2014 · Shintaro Watanabe, Yoichiro Takayama, et al. · IEEE Transactions on Microwave Theory and Techniques · 38
Second Harmonic Treatment Technique for Bandwidth Enhancement of GaN HEMT Amplifier With Harmonic Reactive Terminations
2017 · Jun Enomoto, Ryo Ishikawa, et al. · IEEE Transactions on Microwave Theory and Techniques · 29
Synthesis for Negative Group Delay Circuits Using Distributed and Second-Order RC Circuit Configurations
2009 · Kyoung-Pyo AHN, Ryo ISHIKAWA, et al. · IEICE Transactions on Electronics · 25
Inverse Class-F AlGaN/GaN HEMT Microwave Amplifier Based on Lumped Element Circuit Synthesis Method
2008 · Y. Abe, R. Ishikawa, et al. · IEEE Transactions on Microwave Theory and Techniques · 24
Low Noise Group Delay Equalization Technique for UWB InGaP/GaAs HBT LNA
2010 · Kyoung-Pyo Ahn, Ryo Ishikawa, et al. · IEEE Microwave and Wireless Components Letters · 21
Four-value multiplexing orbital angular momentum communication scheme using loop antenna arrays
2016 · Akira Saitou, Ryo Ishikawa, et al. · Asia-Pacific Microwave Conference (APMC) · 20
Group delay equalised monolithic microwave integrated circuit amplifier for ultra-wideband based on right/left-handed transmission line design approach
2009 · K. Murase, R. Ishikawa, et al. · IET Microwaves Antennas & Propagation · 19
Multi-band reconfigurable antennas embedded with lumped-element passive components and varactors
2013 · Shoichi Onodera, Ryo Ishikawa, et al. · Asia-Pacific Microwave Conference (APMC) · 17
A GaN HEMT Doherty amplifier with a series connected load
2009 · Satoshi Kawai, Yoichiro Takayama, et al. · Asia-Pacific Microwave Conference (APMC) · 17
A 28-GHz-Band GaN HEMT MMIC Doherty Power Amplifier Designed by Load Resistance Division Adjustment
2022 · Ryo Ishikawa, Takuya Seshimo, et al. · European Microwave Integrated Circuits Conference · 16
InGaAs MMIC SPST Switch Based on HPF/LPF Switching Concept With Periodic Structure
2016 · Hiroshi Mizutani, Ryo Ishikawa, et al. · IEEE Transactions on Microwave Theory and Techniques · 16
Fully Integrated Asymmetric Doherty Amplifier Based on Two-Power-Level Impedance Optimization
2018 · Ryo Ishikawa, Yoichiro Takayama, et al. · European Microwave Integrated Circuits Conference · 15
GaN HEMT DC $I$ – $V$ Device Model for Accurate RF Rectifier Simulation
2017 · Tsukasa Yasui, Ryo Ishikawa, et al. · IEEE Microwave and Wireless Components Letters · 15
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High-efficiency DC-to-RF/RF-to-DC interconversion switching module at C-band
2015 · Ryo Ishikawa, Kazuhiko Honjo · European Microwave Conference (EuMC) · 15
Reversible high efficiency amplifier/rectifier circuit for wireless power transmission system
2013 · Ryo Ishikawa, Kazuhiko Honjo · Asia-Pacific Microwave Conference (APMC) · 15
A broadband Doherty power amplifier without a quarter-wave impedance inverting network
2012 · Shintaro Watanabe, Yoichiro Takayama, et al. · Asia-Pacific Microwave Conference (APMC) · 14
Concurrent dual-band access GaN HEMT MMIC amplifier suppressing inter-band interference
2017 · Ryo Ishikawa, Yoichiro Takayama, et al. · IEEE MTT-S International Microwave Symposium digest · 13
Microwave power transfer evaluation at 2.45 GHz using a high-efficiency GaAs HEMT amplifier and rectifier
2013 · Ryo Ishikawa, Kazuhiko Honjo · 13
Harmonic-Tuned High-Efficiency GaN HEMT Doherty Power Amplifier Based on Two- Power- Level Impedance Optimization
2019 · Takuya Seshimo, Yoichiro Takayama, et al. · IEEE Asia-Pacific Microwave Conference (APMC) · 12
Frequency characteristic of power efficiency for 10 W/30 W-class 2GHz band GaN HEMT amplifiers with harmonic reactive terminations
2013 · Tomohiro Yao, Ryo Ishikawa, et al. · Asia-Pacific Microwave Conference (APMC) · 12
Improvement of mode uniqueness for OAM communication using a loop array with reflector plane
2017 · Ryohei Yamagishi, Hiroto Otuka, et al. · IEEE Asia-Pacific Microwave Conference (APMC) · 11
Group delay compensation technique for UWB MMIC using composite right/left-handed circuit
2006 · Kenji Murase, Ryo Ishikawa, et al. · Asia-Pacific Microwave Conference (APMC) · 11
High Efficiency GaN HEMT Power Amplifier/Rectifier Module Design Using Time Reversal Duality
2015 · Kazuhiko Honjo, Ryo Ishikawa · IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS) · 10
Works count: 206
Citation count: 849
H-index: 15
I10-index: 26
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