研究者詳細 - 西川　健二郎

論文 - 西川　健二郎

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Hiroto Sakaki and Kenjiro Nishikawa . Rectifier Model Using Two Types of Neural Networks for Multiple Average Input Power Levels (to be published) . 2026年査読

Hiroto Sakaki and Kenjiro Nishikawa . Rectifier Model Using Two Types of Neural Networks for Multiple Average Input Power Levels . 2025 Asia Pacific Microwave Conference (APMC2025) 1 - 4 2025年12月査読

Qingkun Lyu and Kenjiro Nishikawa . A Nonlinear Rectifying Diode Modeling Approach for High-Efficiency Single-Shunt Rectifier Design . 2025 IEEE International Symposium on Radio-Frequency Integration Technology 25 - 27 2025年8月査読

Shin Yokomura, Daisuke Yasunobu, Hiroto Sakaki, and Kenjiro Nishikawa . Microwave Characterization CPW Lines Using Copper Ink Based Printed Electronics . 2025 IEEE International Symposium on Radio-Frequency Integration Technology 190 - 192 2025年8月査読

Yudai Shiota, Hiroto Sakaki, Kenjiro Nishikawa . A Method for Reducing Learning Time in ARVTDNN for NN-DPD Applications . 2025 IEEE International Symposium on Radio-Frequency Integration Technology 199 - 201 2025年8月査読

Hiroto Sakaki, Kazutomi Mori, and Kenjiro Nishikawa . Hybrid LSTM and polynomial-based rectifier modeling for modulated signals under varying average input power levels . IEICE Communication s Express14 ( 12 ) 424 - 427 2025年8月査読

Daisuke Yasunobu, Hiroto Sakaki, and Kenjiro Nishikawa . Analysis of Microwave CPW Characterization on Printed Electronics Substrate . 2024 Asia Pacific Microwave Conference (APMC2024) 775 - 777 2024年11月査読

Hiroto Sakaki and Kenjiro Nishikawa . A Surrogate Model of Rectifiers with LSTM Neural Networks for Various Modulated Signals . 2024 Asia Pacific Microwave Conference (APMC2024) 399 - 401 2024年11月査読

Kenjiro Nishikawa . Rectifier Desgin Techniques for Wide Dynamic Range Operation . 2023 Asia Pacific Microwave Conference (APMC) 620 - 622 2023年12月招待査読

Daisuke Yasunobu, Ren Furumoto, and Kenjiro Nishikawa . Investigation on High-efficient Saturation Operation of Doherty-Outphasing Hybrid Power Amplifier for WPT applications . 2023 XXXVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) 1 - 4 2023年8月査読

Satoshi Yoshida, and Kenjiro Nishikawa . Dependable Wireless Powering for the Wireless Sensor Station by Using Combination of Solar Cell and Rectenna . 2023 XXXVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) 1 - 2 2023年8月査読

Satoshi Yoshida, and Kenjiro Nishikawa . Effect of the Shielding for Opened Windows of the Reusable Vehicle Test for 5.8-GHz-Band Microwave Power Transmission . 2023 XXXVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) 1 - 2 2023年8月査読

Masahiro Nakagawa, Ren Furumoto, Satoshi Yoshida, and Kenjiro Nishikawa . 28GHz High Efficiency Rectifier Design utilizing Second Harmonic Signal Control . 2023 IEEE Wireless Power Technology Conference and Expo (WPTCE) 1 - 3 2023年6月査読

Ren Furumoto, Daisuke Yasunobu, Kenjiro Nishikawa . Analysis of the Operation of a Hybrid Amplifier Based on the Doherty Amplifier . 2022 Asia-Pacific Microwave Conference Digest(APMC)73 737 - 739 2022年11月

記述言語：英語出版者・発行元：The Institute of Electronics, Information and Communication Engineers

This paper analyzes the limit points of the backoff region of a Hybrid amplifier with outphasing operation on the low output side and Doherty operation on the high output side. The circuit configuration consists of two parallel Doherty amplifiers connected to a Chireix combiner. The Doherty amplifiers were load-pull simulated, and the Chireix combiner was designed based on the impedance of the obtained backoff efficiency. From the simulation results of the Hybrid amplifier designed using symmetrical and asymmetrical Doherty amplifiers, it was confirmed that the limiting point of backoff efficiency is the drain efficiency of the load-pull data for the configuration in which the Chireix combiner is connected without changing the parameters of the Doherty amplifier.

DOI： 10.34385/proc.73.if-a20

Riku Maeda, Satoshi Yoshida, Kenjiro Nishikawa, Shigeo Kawasaki . Demonstration of a 920MHz Band Wireless Sensor System Powered by 5.8 GHz Band Wireless Power Transmission . 2022 Asia-Pacific Microwave Conference Digest (APMC)73 578 - 580 2022年11月

記述言語：英語出版者・発行元：The Institute of Electronics, Information and Communication Engineers

In this paper, a wireless sensor network system that can be coexist with high-power microwave power transmission system is proposed. Based on a frequency division scheme where the microwave power transmission (MPT) system and wireless communication frequencies are 5.8 GHz and 920 MHz, respectively was adopted for the coexistence. Packet error rate (PER) and radio signal strength indicator (RSSI) were measured with rectifier output DC power to show the compatibility. Feasibility of the proposed system was demonstrated by evaluating the measurements in an anechoic chamber.

DOI： 10.34385/proc.73.fr2-f5-5

Satoshi Yoshida, Mizuki Kuwata, Kenjiro Nishikawa . Measurement of a 60-GHz-Band Digital Beamforming Array Using 4-by-2 Circular Patch . 2022 International Symposium on Antennas and Propagation (ISAP)2022 539 - 540 2022年11月査読

Shunya Asakura, Shuhei Yamanokuchi, Satoshi Yoshida, Kenjiro Nishikawa . Design and Prototyping of a Single-Shunt Rectifier with 71% Fractional Bandwidth Having Acceptable Matching on 10 dBm LSSP . 2022 Wireless Power Week (WPW)WPTC2022 383 - 387 2022年7月査読

Yotaro Watanabe, Shintaro Miya, Taishi Nara, Satoshi Yoshida, Shigeo Kawasaki, Kenjiro Nishikawa . Investigation of Transmission Efficiency on Short- range 4x4 MIMO WiCoPT System (finalist for Student Paper Competition) . 2022 Wireless Power Week (WPW)WPTC2022 853 - 856 2022年7月査読

Teruki Yabuta, Satoshi Yoshida, Kenjiro Nishikawa . Dual-band Wireless Power Transfer System for Simultaneous Wireless Information and Power Transfer System . 2022 Wireless Power Week (WPW)WPTC2022 884 - 886 2022年7月査読

朝倉俊哉, 吉田賢史, 西川健二郎 . 比帯域71%を達成する1GHz帯広帯域シングルシャント整流器の設計,測定,評価 . 電気学会研究会資料. EMT = The papers of technical meeting on electromagnetic theory, IEE Japan / 電磁界理論研究会 [編]2022 ( 40-53・55-58・60-81 ) 85 - 89 2022年7月

Satoshi Yoshida, Shunya Asakura, Shuhei Yamanokuchi, Kenjiro Nishikawa . 152.6% Fractional Bandwidth UHF-to-Microwave Band Compact Rectifier Utilizing the Conditions for Flat Frequency Characteristics of RF-DC Conversion Efficiency . IEEE Microwave and Wireless Components Letters32 ( 6 ) 595 - 598 2022年3月査読

Satoshi Yoshida, Suguru Kameda, Noriharu Suematsu, Kenjiro Nishikawa . Re ‐Evaluation of a Dual‐Feed Linear Polarized 2‐by‐2 Circular Patch Array Antenna for 60‐GHz‐Band Digital Beamforming Applications . IEEJ Transactions on Electrical and Electronic Engineering16 ( 12 ) 1653 - 1655 2021年12月査読

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Wiley

<jats:p>In this letter, re‐evaluation results of a 60‐GHz‐band digital beamforming antenna using a dual‐feed linear polarized 2 × 2 circular patch array antenna is reported. The extension from our previous report is providing new measurement data under the condition of all intermediate frequency (IF) signal usage by re‐fabrication, although we reported imperfect measurement results using the IF signals only 5 ch out of 8 ch in the previous report due to the fabrication error. A low temperature solder paste was newly used to prevent the warp of the multilayered substrate. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.</jats:p>

DOI： 10.1002/tee.23478

CiNii Research

Ren Furumoto, Hayato Shimizu, Kenjiro Nishikawa . Design of 94GHz High Efficiency Rectifier MMIC . 2021 IEEE Asia-Pacific Microwave Conference (APMC) 2021年11月

Koshi Hamano, Hayato Shimizu, Kenjiro Nishikawa . Analysis of Phase Offset Impact on Millimeter-wave Broadband Doherty Amplifier MMIC . 2021 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) 2021年8月招待査読

古本廉, 清水駿斗, 西川健二郎 . 94GHz帯高効率整流回路MMICの設計 . 電気学会研究会資料. EMT = The papers of technical meeting on electromagnetic theory, IEE Japan / 電磁界理論研究会 [編]2021 ( 26-35・37-50 ) 17 - 22 2021年7月

Satoshi Yoshida, Kenjiro Nishikawa . Expansion Technique of the Beamforming Area for 60-GHz-Band Beamforming Array Antenna in Mobile Wireless Terminal Application . 2021 13th Global Symposium on Millimeter-Waves & Terahertz (GSMM) 2021年5月査読

Satoshi Yoshida, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu, Kenjiro Nishikawa, and Shigeo Kawasaki . Expansion of the Beamforming Coverage Area in an Elevation Plane for 60-GHz-Band 3D Beamforming . IEEE Antennas and Wireless Propagation Letters20 ( 5 ) 773 - 775 2021年5月査読

Satoshi Yoshida, Kenjiro Nishikawa, and Shigeo Kawasaki . C-Band Frequency Tunable Rectifier Designed by HySIC Concept Utilizing GaAs MMIC and Si RFIC . IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS30 ( 10 ) 997 - 1000 2020年9月査読

Hayato Shimizu, Yudai Iwashita, Ryotaro Iwamoto and Tamio Kawaguchi, and Kenjiro Nishikawa . 6 - 10 GHz Cryogenic GaAs pHEMT LNA MMIC . 2020 IEEE International Symposium on Radio Frequency Integrated Technology (RFIT) 117 - 119 2020年9月査読

Kenjiro Nishikawa and Satoshi Yoshida . Rectifier Design Challenges Towards Wide Dynamic Range Performance (invited) . 2020 IEEE International Symposium on Radio Frequency Integrated Technology (RFIT) 227 2020年9月招待査読

Runyuan Li, Satoshi Yoshida, Yasunori Suzuki, Hiroshi Okazaki, and Kenjiro Nishikawa . Investigation of Rectifier Operation with Harmonic Controlled Input Signals Towards Pulse Modulation WiCoPT System (RFIT2020 Student Award) . 2020 IEEE International Symposium on Radio Frequency Integrated Technology (RFIT) 228 - 230 2020年9月査読

Takuya Obara, Satoshi Yoshida, Kenjiro Nishikawa, and Shigeo Kawasaki . Analysis and Optimization of GaN Diode Structure for High Power and High Efficiency Rectifier . URSI XXXIIIrd General Assembly and Scientific Symposium (URSI GA2020) D03-05 2020年8月査読

Satoshi Yoshida, Kenjiro Nishikawa, and Shigeo Kawasaki . Initial Verification of a Bandwidth Tunable Ku-Band Power Amplifier Designed by the HySIC Concept . IEICE Communications Express9 ( 12 ) 599 - 604 2020年7月査読

Satoshi Yoshida, Kentaro Matsuura, Daisuke Kobuchi, Naoto Yabuta, Toshihiro Nakaoka, Kenjiro Nishikawa, and Shigeo Kawasaki . The K-Band Communication Transmitter/Receiver Powered by the C-Band HySIC Energy Harvester with Multi-Sensors . 2020 IEEE MTT-S International Microwave Symposium 1180 - 1183 2020年6月査読

Satoshi yoshida and Kenjiro Nishikawa . Experimental Verification of Excavated Structure on Multi-Layered Substrates for Millimeter-Wave Signal Vertical Transition Using Copper Balls . IEEE Accessvol.8 2362 - 2372 2019年12月査読

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IEEE

This paper presents a vertical transition of millimeter-wave signal for interconnection between multi-layered substrates, which utilizes copper balls for vertical interconnection, as both for electrical connection and physical support. In particular, the copper balls were used to configure a quasi-coaxial transmission line at the vertical interconnection. The key idea was to create an excavated structure at the location of the copper balls to fix it, given that the copper balls slightly fluctuate during reflow soldering when simply placed on a flat surface. Such activity of the copper balls defines large variation in transmission characteristics at millimeter-wave band that produce low yield rate. Practically, with the proposed method of an excavated structure, the location error of the copper balls can be minimized, leading to high reproducibility in determining the copper balls location, and small variation of the transmission characteristics. To verify the method’s effectiveness, a prototype having three vertically stacked multi-layered substrates with the excavated structure was fabricated. The excavation had a depth of 90 m and diameter of 0.45 mm. The copper balls used had a 0.3-mm diameter. Five samples were fabricated and then evaluated by X-ray images and S-parameter measurements. Based on the results, the reflection characteristics of the measurement were less than –10 dB from dc to 97 GHz in the best-case scenario, whereas the variation in the S-parameters was comparatively small up to 70 GHz. Moreover, the X-ray images showed relatively small copper balls location error. These results indicate that the proposed excavated structure is effective for millimeter-wave vertical interconnections using copper balls, in small wireless terminal applications.

DOI： 10.1109/ACCESS.2019.2961624

Satoshi Yoshida and Kenjiro Nishikawa . 60-GHz-Band Dipole Array Antenna Using Copper Balls Interconnection With Excavated Structure . 2019 Antennas Design and Measurement International Conference (ADMInC) 111 - 113 2019年10月査読

Daisuke Kobuchi, Kentaro Matsuura, Yoshiaki Narusue, Satoshi Yoshida, Kenjiro Nishikawa, and Shigeo Kawasaki . Smart Wireless Sensor System by Microwave Powering for Space-by-Wireless . 2019 IEEE MTT-S International Microwave SymposiumTH2G-2 1144 - 1147 2019年6月査読

Ayako Suzuki, Koshi Hamano, Hayato Shimizu, Hiroshi Okazaki, Yasunori Suzuki, Kunihiro Kawai, Atsushi Fukuda, and Kenjiro Nishikawa . Wide dynamic range rectifier circuit with varactor tuning technique . 2019 IEEE Wireless Power Transfer Conference (WPTC2019)WPTC2-4 45 - 48 2019年6月査読

Satoshi Yoshida, Kenjiro Nishikawa, and Shigeo Kawasaki . 10W Class High Power C-Band Rectifier Using GaN HEMT . 2019 IEEE Wireless Power Transfer Conference (WPTC2019)WPP90 595 - 598 2019年6月査読

Ryutaro Onimaru, Satoshi Yoshida, and Kenjiro Nishikawa . 60 GHz Dual-Polarized 2×2 Phased Array Antenna Using Copper Ball Interconnection (GSMM Student Paper Award) . Global Symposium on Millimeter Wave 2019 (GSMM2019)FR2-3 65 - 68 2019年5月査読

K. Hamano, A. Suzuki, K. Nishikawa, and S. Kawasaki . 2.4/5.8GHz Dual-band Rectifiers for Aerospace Wireless Sensor and RF Energy Harvester System . 2019 IEEE Radio Wireless Symposium WE2A-1 2019年1月査読

Ayako Suzuki, Koshi Hamano, Kenjiro Nishikawa, and Shigeo Kawasaki . WPT Area Expansion Technique Utilizing Magnetic MISO Beamformer . 2018 Asia-Pacific Microwave Symposium 46 - 48 2018年11月査読

Kenjiro Nishikawa and Masashi Muraguchi . Dual-Mode Frequency Tunable Planar Filter Design with Capacitive Coupling Technique . 2018 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) 1 - 3 2018年8月招待査読

吉田賢史，西川健二郎，川崎繁男 . 太陽光発電とマイクロ波電力伝送を併用したハイブリッドエナジーハーベスタの実験評価 . 電気学会論文誌D138 ( 7 ) 615 - 622 2018年7月査読

S. Kawasaki, S. Yoshida, T. Nakaoka, and K. Nishikawa . The C-Band HySIC RF energy harvester based on the space information, communication and energy harvesting technology . 2018 IEEE MTT-S International Microwave Symposium 2018年6月査読

吉田賢史, 西川健二郎, 川崎繁男 . 太陽光発電とマイクロ波電力伝送を併用したハイブリッドエナジーハーベスタの実験評価 . 電気学会論文誌. D,　産業応用部門誌138 ( 7 ) 615 - 622 2018年

出版者・発行元：一般社団法人電気学会

<p>In this paper, we demonstrate the experimental evaluation of system feasibility of a wireless sensor network system powered by a hybrid energy harvester inside a reusable vehicle test (RVT). The hybrid energy harvester consists of a solar cell and a microwave rectifier as a passive and an active powering method, respectively. Basic characteristic measurement of the hybrid energy harvester under line-of-sight conditions and multi-sensor operation under non-line-of-sight conditions were carried out using the real RVT which is covered by an aeroshell.</p>

DOI： 10.1541/ieejias.138.615

CiNii Research

Kenjiro Nishikawa, Masanobu Tsujii, Koshi Hamano, Kunihiro Kawai, Hiroshi Okazaki and Shoichi Narahashi . Impact of LNA performances on Mobile Base Station Receiver (Invited) . 2017 IEEE International Microwave and RF Conference (IMaRC2017) TU2A-1 2017年12月招待査読

K. Hamano, R. Tanaka, S. Yoshida, H. Sakaki, K. Nishikawa, S. Kawasaki, K. Kawai, H. Okazaki, S. Narahashi, and N. Shinohara . Wide Dynamic Range Rectifier Circuit with Sequential Power Delivery Technique . 47th European Microwave Conference (EuMC 2017) 1155 - 1158 2017年10月査読

Koshi Hamano, Keita Ohtsuka, Ryuya Tanaka, and Kenjiro Nishikawa . 4x1 Multi-Input Single-Output Magnetic Resonance Beamforming Wireless Power Transfer System . 2017 Int. Applied Computational Electromagnetics Society Symposium in China TU3-D4 2017年8月査読

Shigeo Kawasaki, Ryoko Kishikawa, Yuki Furuse, Toshihiro Nakaoka, Satoshi Yoshida, Kenjiro Nishikawa, and Harunobu Seita . C-band energy harvester by Si RFICs with GaN diodes for microwave power transfer (Invited paper) . 2017 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) 147 - 149 2017年8月招待査読

Koshi Hamano, Ryuya Tanaka, Satoshi Yoshida, Akihira Miyachi, Kenjiro Nishikawa, and Shigeo Kawasaki . Design of Concurrent Dual-Band Rectifier with Harmonic Signal Control . 2017 IEEE MTT-S International Microwave Symposium 1042 - 1045 2017年6月査読

Ryoko Kishikawa, Seita Harunobu, Akihira Miyachi, Yuki Furuse, Toshiya Nakaoka, Satoshi Yoshida, Kenjiro Nishikawa, Masahiro Horibe, and Shigeo Kawasaki . Hybrid Semiconductor Integrated Recitifer for Wireless Power Transmission into Spacecraft . 2017 IEEE Wireless Power Transfer Conference (WPTC2017) 2017年5月査読

Ryousuke Kashimura, Tomohiro Seki, Koichi Sakaguchi, and Kenjiro Nishikawa . Rectifying Circuit with High Impedance Microstrip Line for Wide Dynamic Range Characteristics . 2017 IEEE Wireless Power Transfer Conference (WPTC2017) 2017年5月査読

Hideshi Kakiuchi, Yuta Sakiyama, and Kenjiro Nishikawa . On-chip Grounded CPW Line Model with Anomalous Skin Effect in THz Band (Best Student Paper Award 3rd Prize ) . 38th Progress In Electromagnetics Research Symposium (PIERS2017) 1616 - 1619 2017年5月査読

Satoshi Yoshida, Koshi Hamano, Akihira Miyachi, Kenjiro Nishikawa, and Shigeo Kawasaki . Evaluation of a C-Band Rectifier Using Si Substrate for HySIC Application . 2017 IEEE Wireless Power Transfer Conference (WPTC2017) 2017年5月査読

S. Yoshida, K. Maruyama, D. Matsushita, K. Nishikawa . UHF-band meander line antenna and 60-GHz-band patch antenna with single feed structure for 5G terminal application . 2016 International Symposium on Antennas and Propagation (ISAP) 1044 - 1045 2016年11月査読

H. Shimamura, R. Tanaka, H. Sakaki, S. Yoshida, K. Nishikawa, and S. Kawasaki . Impact of Symbol Rate and Roll-off Factor on Rectifier RF-DC Conversion Efficiency for WiCoPT System . 46th European Microwave Conference (EuMC 2016) 934 - 937 2016年10月査読

K. Hamano, R. Tanaka, S. Yoshida, A. Miyachi, K. Nishikawa, and S. Kawasaki . Design of Dual-Band Rectifier Using Microstrip Spurline Notch Filter . 2016 IEEE Radio Frequency Integrated Circuit Conference (2016RFIT) 1 - 3 2016年8月査読

S. Yoshida, A. Miyachi, R. Kishikawa, M. Horibe, K. Nishikawa, and S. Kawasaki . C Band GaN Diode Rectifier with 3W DC Output for High Power Microwave Power Transmission Applications . 2016 IEEE MTT-S International Microwave Symposium (2016IMS) THIF2-29 2016年5月査読

T. Kuwahara, K. Hamano, R. Tanaka, S. Yoshida, K. Nishikawa, T. Seki, and S. Kawasaki . Short-Range 4x4 MIMO Wireless Communication and Power Transfer System . 2016 IEEE Wireless Power Transfer Conference (WPTC2016) SessionV-4 2016年5月査読

榊裕翔, 福田豪, 吉田賢史, 西川健二郎, 川崎繁男, 河合邦浩, 岡崎浩司, 楢橋祥一 . 変調信号入力時における整流回路変換効率解析 . 電子情報通信学会和文論文誌CJ98-C ( 12 ) 383 - 392 2015年12月査読

K. Nishikawa and H. Sakai . Impact of Modulation Scheme on Rectifier RF-DC Efficiency and Optimal Signal Control Technique (Invited) . 2015 IEEE International Microwave and RF Conference (IMaRC2015) SAT2A-1 2015年12月招待査読

H. Sakaki, S. Yoshida, K. Nishikawa, and S. Kawasaki . Modulated Scheme and Input Power Impact on Rectifier RF-DC Efficiency for WiCoPT System . 45th European Microwave Conference (EuMC 2015) 60 - 63 2015年9月査読

S. Yoshida, N. Hasegawa, Y. Kobayashi, A. Miyachi, H. Sakaki, K. Nishikawa, Y. Moriguchi, S. Furuta, C. Maekawa, I. Urushibara, and S. Kawasaki . Wireless Sensor Network System with Wireless Powering by Time Division Operation at 5.8 GHz in a Reusable Rocket . 2015 IEEE International Symposium on Radio Frequency Integration Technology (RFIT) ( FR4A-3 ) 232 - 234 2015年8月査読

R. Takamori, K. Nishikawa, Y. Maru, and S. Kawasaki . Interference Analysis of Dual-band WiCoPT System for Wireless Sensor Network in RVT . 2014 Asia-Pacific Microwave Conf. Proc. 167 - 169 2014年11月査読

H. Sakaki, F. Kuroiwa, M.Tsujii, M. Muraguchi, K. Nishikawa, K. Kawai, H. Okazaki, and S. Narahashi . A Novel Wide Dynamic Range Rectifier Design For Wireless Power Transfer System . 2014 Asia-Pacific Microwave Conf. Proc. 1208 - 1210 2014年11月査読

H. Sakaki, and K. Nishikawa . Broadband Rectifier Design based on Quality Factor of Input Matching Circuit . 2014 Asia-Pacific Microwave Conf. Proc. 1205 - 1207 2014年11月査読

H. Sakaki, T. Kuwahara, S. Yoshida, S. Kawasaki, and K. Nishikawa . Analysis of Rectifier RF-DC Power Conversion Behavior with QPSK and 16QAM Input Signals for WiCoPT System . 2014 Asia-Pacific Microwave Conf. Proc. 603 - 605 2014年11月査読

K. Nishikawa, H. Sakaki, R. Takamori, H. Seita, H. Amano, E. Leclerc, and Y. Takahashi . Hot-via Interconnect Technology Towards THz Package . 2013 International Symposium on Interfacial Joining and Surface Technology (IJST2013) (Invited paper) 5 - 6 2013年11月査読

H. Sakaki, S.Yoshida, K. Nishikawa, and S. Kawasaki . Investigation of Rectifier Operation with Pulse signal . 2013 URSI Asia-Pacific Radio Science Conference ( CBH-5 ) 2013年9月査読

R. Takamori, M. Kawasaki, H. Seita, H. Amano, E. Leclerc, K. Nishikawa, and S. Kawasaki . Low-power 24-34 GHz Amplifier MMIC with Hot-via Interface . 2013 URSI Asia-Pacific Radio Science Conference ( DJ1a-2 ) 2013年9月査読

H. Sakaki, S. Yoshida, K. Nishikawa, S. Kawasaki . Analysis of Rectifier Operation with FSK Modulated Input Signal . 2013 IEEE MTT-S Wireless Power Transfer Conference Proc. 187 - 190 2013年5月査読

R. Takamori, M. Kawasaki, H. Seita, K. Nishimori, N. Honma, K. Nishikawa, Y. Maru, S. Kawasaki . Wireless Sensor Network in Reusable Vehicle Rocket and Low-power 20-30 GHz Amplifier MMIC . 2013 IEEE MTT-S Wireless Power Transfer Conference Proc. 96 - 99 2013年5月査読

S. Yoshida, G. Fukuda, Y. Kobayashi, S. Tashiro, T. Noji, K. Nishikawa, S. Kawasaki . The C-Band MPT Rectifier Using a HEMT without Bonding-Wire Connection for a Space Health Monitoring System . 2013 IEEE MTT-S Wireless Power Transfer Conference Proc. 163 - 166 2013年5月査読

K. Kusumi, K. Nishimori, N. Honma, K. Nishikawa, Y. Maru, and S. Kawasaki . Performance evaluation by MIMO transmission in small rocket . 2012 International Symposium on Antenna and Propagation Dig. 1228 - 1231 2012年8月査読

K. Hiraga, T. Seki, K. Nishimori, K. Nishikawa, I. Toyoda, and K. Uehara . Analyses of Antenna Displacement in Short-Range MIMO Transmission over Millimeter-Wave . IEICE Trans. Commun.E94-B ( 10 ) 2891 - 2895 2011年10月査読

T. Nishino, S. Kawasaki, N. Suematsu, and K. Nishikawa . Microwave R&D inside Japan . 2011 European Microwave Conference Proceedings (Invited paper) 1328 - 1331 2011年10月査読

N. Shinohara, K. Nishikawa, T. Seki, and K. Hiraga . Development of 24 GHz Rectennas for Fixed Wireless Access . 2011 URSI General Assembly C06-3 2011年8月査読

K. Hatano, N. Shinohara, T. Mitani, K. Nishikawa, T. Seki, and K. Hiraga . Development of class-F load rectenna . 2011 IEEE MTT-S International Microwave WorkshopSeries on Innovative Wireless Power Transmission 251 - 254 2011年5月査読

T. Seki, K. Hiraga, K. Nishimori, and K. Nishikawa . High Speed Parallel Data Transmission and Power Transmission Technology for Wireless Repeater System . 5th European Conference on Antennas and Propagation (EuCAP) Proc. 4077 - 4080 2011年4月査読

M. Kawashima, K. Nishikawa, S. Kawasaki, H. Seita, and Y. Omura . A Distributed Upconverter MMIC with Composite Right/Left Handed Transmission Lines . 2010 European Microwave Integrated Circuits Conf.(EuMIC) Proc. 202 - 205 2010年10月査読

Y. Yamaguchi, T. Kaho, M. Sasaki, K. Nishikawa, T. Seki, T. Nakagawa, K. Uehara, and K. Araki . An Analysis of Multi-Layer Inductors for Miniaturizing of GaAs MMIC . IEICE Trans. ElectronicsVol. E93-C ( No. 7 ) 1119 - 1125 2010年7月査読

K.Nishikawa, M. Kawashima, T. Seki, and K. Hiraga . Broadband and Compact 3-dB MMIC Directional Coupler with Lumped Element . 2010 IEEE MTT-S Int. Microwave Symp. (IMS) Dig. 728 - 731 2010年6月査読

T. Kaho, Y. Yamaguchi, K. Nishikawa, I. Toyoda, and K. Uehara . Ultra Compact RFIC Using Three-dimensional MMIC Technology . 2010 IEEE MTT-S Int. Microwave Symp. (IMS) Dig. 1304 - 1307 2010年6月査読

H. Nosaka, T. Kosugi, K. Nishikawa, I. Toyoda, and K. Murata . Dynamic 1/4N Frequency Divider Using Delay-Controlled Even-Stage Buffers . IEICE Trans. Electronics (in Japanese)Vol. J93-C ( No. 2 ) 66 - 74 2010年2月査読

K. Hiraga, T. Seki, K. Nishimori, K. Nishikawa, and K. Uehara . Ultra-High-Speed transmission over Millimeter-Wave using Microstrip Antenna Array . 2010 IEEE Radio and Wireless Symp. (RWS) Dig. 673 - 676 2010年1月査読

T. Seki, K. Nishimori, K. Hiraga, and K. Nishikawa . Experimental Evaluation of High Speed parallel Data Transmission Technology for Wireless Repeate System . 2010 IEEE Radio and Wireless Symp. (RWS) Dig. 304 - 307 2010年1月査読

K. Hiraga, T. Seki, K. Nishimori, K. Nishikawa, and K. Uehara . Ultra High Speed Short-Range Parallel Transmission Using Millimeter-Wave Frequency Band . 2009 Asia-Pacific Microwave Conference (APMC) Dig. 1212 - 1215 2009年12月査読

T. Seki, K. Hiraga, K. Nishikawa, and K. Uehara . Small Size Base Station Antenna using Phase Difference Feed for Narrowband Ubiquitous Communication . 2009 IEEE MTT-S International Microwave Workshop on Wireless Sensing, Local Positioning, and RFID (IMWS 2009) Proc. G-4 2009年10月査読

H. Seita, K. Nishikawa, and S. Kawasaki . Characteristics of a Wide-Band, High-Gain MMIC LNA operating at the Ka-Band . Global Symposium on Millimeter Waves 2009 (GSMM 2009) Dig., Session11-2, 2009 Session 11-2 2009年4月査読

T. Seki, K. Hiraga, K. Nishikawa, and K. Uehara . 60-GHz Microstrip Antenna with Stacked Rings using Multi-Layer LTCC Substrate . 2009 European Conf. on Antennas and Propagation (EuCAP) Proc. 3793 - 3800 2009年3月査読

N. Honma, T. Seki, and K. Nishikawa . Compact Planar Four-Sector Antenna Comprising Microstrip Yagi-Uda Arrays In a Square Configuration . IEEE Antenna and Wireless Propagation Lettersvol. 7 ( No. 5 ) 596 - 598 2008年5月査読

T. Seki, K. Nishikawa, and K. Okada . 60-GHz Multi-Layer Parasitic Microstrip Array Antenna with Stacked Rings using Multi-Layer LTCC Substrate . 2008 IEEE Radio and Wireless Symp. (RWS) Dig. 679 - 682 2008年1月査読

T. Kaho, M. Sasaki, Y. Yamaguchi, K. Nishikawa, and K. Uehara . Miniaturized Multilayer Inductors on GaAs Three-dimensional MMIC . 2007 IEEE Korea-Japan Microwave Conference Dig. 149 - 152 2007年11月査読

M. Kawashima, Y. Yamaguchi, K. Nishikawa, and K. Uehara . Broadband Low Noise Amplifier with High Linearity for Software-Defined Radios . 2007 European Microwave Integrated Circuits Conf.Proc. 243 - 246 2007年10月査読

K. Nishikawa, T. Seki, I. Toyoda, and S. Kubota . Compact 60-GHz LTCC Stlipline Parallel-coupled Bandpass Filter with Parasitic Elements for Millimeter-wave System-on-Package . 2007 IEEE MTT-S Int. Microwave Symp. Dig. 1649 - 1652 2007年6月査読

T. Seki, K. Nishikawa, I. Toyoda, and S. Kubota . Microstrip Array Antenna with Parasitic Elements Alternately Arranged Over Two Layers of LTCC Substrate for Millimeter-wave Applications . 2007 IEEE Radio and Wireless Symp. Dig. 149 - 152 2007年1月査読

N. Honma, T. Seki, K. Nishikawa, K. Tsunekawa, and K. Sawaya . Compact Six-sector Antenna Employing Three Intersecting Dual Beam Microstrip Yagi-Uda Arrays with Common Director . IEEE Trans. Antenna and Prop.Vol. 54 ( No. 11 ) 3055 - 3062 2006年11月査読

T. Seki, K. Nishikawa, Y. Suzuki, I. Toyoda, and K. Tsunekawa . 60 GHz Monolithic LTCC Module for Wireless Communication Systems . 2006 European Microwave Conf. Proc. 1671 - 1674 2006年10月査読

K. Nishikawa, T. Enoki, S. Sugitani, and I. Toyoda . 0.4 V, 5.6 mW InP HEMT V-band Low-Noise Amplifier MMIC . 2006 IEEE MTT-S Int. Microwave Symp. Dig. 810 - 813 2006年6月査読

T. Tanaka, K. Nishikawa, and M. Aikawa . Miniaturized Branch-Line Hybrid Circuit Using 3-D MMIC Quasi-Distributed TFMS Lines . IEICE Trans.Electronics (in Japanese)Vol.J89-C ( No.5 ) 249 - 258 2006年5月査読

T. Seki, K. Nishikawa, I. Toyoda, and K. Tsunekawa . Millimeter-wave High-Efficiency Multilayer Parasitic Microstrip Antenna Array for System-on-package . NTT Technical ReviewVol. 3 ( No. 9 ) 33 - 41 2005年9月査読

N. Honma, K. Nishimori, T. Seki, K. Nishikawa, and K. Tsunekawa . Triple Polarization Antenna Employing Capacitor Loaded Monopole Antenna and Notch Antenna for MIMO Systems . 2005 Int. Symp. on Antenna and Propagation (ISAP2005) Dig. 367 - 370 2005年8月査読

T. Seki, N. Honma, K. Nishikawa, and K. Tsunekawa . Stacked Microstrip Antenna Employing tapered Multi-Ring Elements . 2005 Int. Symp. on Antenna and Propagation (ISAP2005) Dig. 1141 - 1144 2005年8月査読

N. Honma, T. Seki, K. Nishikawa, and K. Tsunekawa . Beam-Scanning Performance of Ku-Band Low Loss MUSCAT Array with Open Stubs . 2005 IEEE AP-S Symp. Dig. 309 - 402 2005年7月査読

T. Seki, N. Honma, K. Nishikawa, K. Tsunekawa . High Efficiency Multi-Layer Parasitic Microstrip Antenna Array on TEFLON Substrate . IEEE Trans. Microwave Theory and Tech.Vol. 53 ( No.6 ) 2101 - 2106 2005年6月査読

N. Honma, T. Seki, K. Nishikawa, K. Tsunekawa, and K. Sawaya . Series Fed Beam Scanning Antenna Employing Multi-Stage Configured Microstrip Antennas with Tunable Reactance Devices . IEICE Trans. CommunicationsVol. E88-B ( No. 6 ) 2297 - 2304 2005年6月査読

T. Seki, K. Nishikawa, N. Honma, and K. Tsunekawa . Novel Microstrip Antenna Employing Stacked Rings on Multi-Layer Ceramic Substrate for mm-Wave Applications . 2005 IEEE MTT-S Int. Microwave Symp. Dig. 1405 - 1408 2005年6月査読

K. Nishikawa, T. Enoki, S. Sugitani, I. Toyoda, and K. Tsunekawa . Low-voltage and Broadband V-band InP HEMT Frequency Doubler MMIC . 2005 IEEE MTT-S Int. Microwave Symp. Dig. 45 - 48 2005年6月査読

T. Seki, N. Honma, K. Nishikawa, and K. Tsunekawa . A 60-GHz Multi-Layer Parasitic Microstrip Array Antenna on LTCC Substrate for System-on-Package . IEEE Wireless and Component LettersVol. 15 ( No. 5 ) 339 - 341 2005年5月査読

T. Seki, N. Honma, K. Nishikawa, and K. Tsunekawa . High Efficiency Multi-Layer Parasitic Microstrip Array Antenna on TEFLON Substrate . 2004 European Microwave Conf. Proc., pp. 829-833 829 - 833 2004年10月査読

T. Seki, N. Honma, K. Nishikawa, and K. Tsunekawa . Design of High Efficiency Multi-Layer Parasitic Microstrip Array Antenna . 2004 Int. Symp. on Antenna and Propagation (ISAP04), Dig. 393 - 396 2004年8月査読

N. Honma, T. Seki, K. Nishikawa, and K. Tsunekawa . New MUSCAT Array with Parasitic Elements Toward Wide Scanning Range . 2004 Int. Symp. on Antenna and Propagation (ISAP04) Dig. 1217 - 1220 2004年8月査読

N. Honma, T. Seki, K. Nishikawa, and K. Tsunekawa . Series-fed beam-scanning array antenna comprising multi-stage configured microstrip antenna with tunable reactance devices and open stubs . 2004 IEEE AP-S Symp. Dig. 3980 - 3983 2004年7月査読

T. Tanaka, K. Nishikawa, and M. Aikawa . Miniaturized 90° Hybrid Circuit Using Quasi-Distributed TFMS Line . 2004 IEEE MTT-S Int. Microwave Symp. Dig. 331 - 334 2004年6月査読

西川健二郎 . ３次元構造によるMMICの高集積化・高機能化に関する研究 . 2004年1月査読

M. Kawashima, K. Nishikawa, T. Nakagawa, and K. Araki . Multi-Band Amplifier Using FET Bias Controlled Matching Circuit . IEICE Trans. Electronics (in Japanese)Vol. J87-C ( No.1 ) 54 - 60 2004年1月査読

K. Nishikawa, B. Piernas, T. Nakagawa, K. Araki, and K. Cho . V-band Fully-integrated TX/RX Single-chip 3-D MMICs Using Commercial GaAs pHEMT Technology For High-speed Wireless Applications . 2003 IEEE GaAs IC Symp. Dig. 97 - 100 2003年11月査読

T. Seki, K. Nishikawa, and K. Cho . Multi-Layer Parasitic Microstrip Array Antenna on LTCC Substrate for Millimeter-Wave System-on-Package . 2003 European Microwave Conf. Proc. 1393 - 1396 2003年10月査読

M. Kawashima, T. Nakagawa, H. Hayashi, and K. Nishikawa . A Wideband RF Chipset for Multi-band Direct Conversion Transceivers . NTT Technical ReviewVol. 1 ( No. 4 ) 31 - 39 2003年7月査読

B. Piernas, K. Nishikawa, T. Nakagawa, and K. Araki . A Compact and Low Phase-noise Ka-band PHEMT-based VCO . IEEE Trans. Microwave Theory Tech.Vol. 51 ( No. 3 ) 778 - 783 2003年3月査読

M. Kawashima, T. Nakagawa, H. Hayashi, K. Nishikawa, and K. Araki . A 0.9-2.6 GHz Broadband RF Front-End Chip-Set with a Direct Conversion Architecture . IEICE Trans. CommunicationsVol. E85-B ( No. 12 ) 2732 - 2740 2002年12月査読

K. Nishikawa, K. Kamogawa, B. Piernas, T. Nakagawa, and K. Araki . 1-V Operation High-frequency Broadband Si 3-D MMICs . 2002 Asia-Pacific Microwave Conf. Proc. 693 - 696 2002年11月査読

T. Nakagawa, K. Nishikawa, and K. Araki . 60-Ghz band and 5-Ghz band Demodulator MMICs for More Than 1-Gbps FSK Transceivers . 2002 Asia-Pacific Microwave Conf. Proc. 839 - 842 2002年11月査読

M. Kawashima, H. Hayashi, T. Nakagawa, K. Nishikawa, and K. Araki . A Multi-Band Direct Conversion Transceiver For Software-Defined Radios . 2002 Asia-Pacific Microwave Conf. Proc. 985 - 988 2002年11月査読

T. Nakagawa, K. Nishikawa, B. Piernas, T. Seki, and K. Araki . 60-Ghz Antenna and 5-Ghz Demodulator MMICs for More Than 1-Gbps FSK Transceivers . 2002 European Microwave Conf. Proc. 929 - 932 2002年10月査読

K. Nishikawa, B. Piernas, T. Nakagawa, K. Araki, and K. Cho . 60-Ghz Single-chip Receiver 3-D MMIC using Commercial GaAs pHEMT Technology . 2002 Int. Conf. Solid State Devices and Materials Dig. 302 - 303 2002年9月査読

B. Piernas, K. Nishikawa, K. Kamogawa, T. Nakagawa, and K. Araki . High-Q Factor Three-dimensional Inductors . IEEE Trans. Microwave Theory Tech.Vol. 50 ( No. 8 ) 1942 - 1949 2002年8月査読

T. Seki, K. Nishikawa, and K. Cho . Novel Multi-layer Active Integrated Antenna Configuration Using Teflon Substrate . 2002 Int. Symp. on Antenna and Propagation (ISAPi-02) Dig. 105 - 108 2002年8月査読

B. Piernas, K. Nishikawa, K. Kamogawa, and I. Toyoda . Three-Dimensional MMIC Technology on Silicon: Review and Recent Advances (Invited paper) . IEICE Trans. ElectronicsVol. E85-C ( No. 7 ) 1394 - 1403 2002年7月査読

K. Nishikawa, B. Piernas, T. Nakagawa, and K. Araki . Miniaturized and Broadband V-band Balanced Frequency Doubler for Highly Integrated 3-D MMIC . 2002 IEEE MTT-S Int. Microwave Symp. Dig. 351 - 354 2002年6月査読

K. Nishikawa, B. Piernas, K. Kamogawa, T. Nakagawa, and K. Araki . Compact LNA and VCO 3-D MMICs Using Commercial GaAs PHEMT Technology for V-band Single-chip TRX MMIC . 2002 IEEE MTT-S Int. Microwave Symp. Dig. 1717 - 1720 2002年6月査読

M. Kawashima, H. Hayashi, T. Nakagawa, K. Nishikawa, and K. Araki . A 0.9 -2.6 Ghz Broadband RF Front-end For Direct Conversion Transceivers . 2002 IEEE MTT-S Int. Microwave Symp., Dig. 927 - 930 2002年6月査読

B. Piernas, K. Nishikawa, T. Nakagawa H. Hayashi, and K. Araki . Analysis of Balanced Active Doubler for Broad-Band Operation-The Frequency-Tuning Concept . IEEE Trans. Microwave Theory Tech.Vol. 50 ( No. 4 ) 1120 - 1126 2002年4月査読

K. Nishikawa, K. Kamogawa, B. Piernas, M. Tokumitsu, I. Toyoda, S. Sugitani, and K. Araki . Three-dimensional MMIC Technology for Low-cost Millimeter-wave MMICs . IEEE Journal of Solid-state CircuitsVol. 36 ( No. 9 ) 1351 - 1359 2001年9月査読

M. Nakatsugawa and K. Nishikawa . A Novel Configuration for 1:N Multiport Power Dividers Using Series/Parallel Transmission-Line Division and a Polyimide/Alumina-Ceramic Structure for HPA Module Implementation . IEEE Trans. Microwave Theory Tech.Vol. 49 ( No. 6 ) 1187 - 1193 2001年6月査読

K. Nishikawa, K. Kamogawa, T. Nakagawa, B. Piernas, and K. Araki . Broadband and Compact SiBJT Balanced Up-converter MMIC Using Si 3-D MMIC Technology . 2001 IEEE MTT-S Int. Microwave Symp. Dig. 87 - 90 2001年5月査読

K. Nishikawa, S. Sugitani, K. Inoue, T. Ishii, K. Kamogawa, B. Piernas, and K. Araki . Low-loss Passive Components on BCB-based 3-D MMIC Technology . 2001 IEEE MTT-S Int. Microwave Symp. Dig. 1881 - 1884 2001年5月査読

B. Piernas, K. Nishikawa, K. Kamogawa, T. Nakagawa, and K. Araki . Improved Three-Dimensional GaAs Inductors . 2001 IEEE MTT-S Int. Microwave Symp. Dig. 189 - 192 2001年5月査読

B. Piernas, H. Hayashi, K. Nishikawa, and T. Nakagawa . A New Family of Broadband Phase Compensated 180o Rat-race Hybrid Type Power Divider . 2000 IEEE Topical Symp. on Millimeter Wave Dig. 153 - 156 2000年11月査読

H. Hayashi, B. Piernas, K. Nishikawa, and T. Nakagawa . A Miniaturized 45°Power Divider Using Three-dimensional MMIC Technology . Electronics LettersVol.36 ( No.21 ) 1785 - 1786 2000年10月査読

K. Nishikawa, K. Kamogawa, M. Tokumitsu, I. Toyoda, S. Sugitani, and K. Araki . Three-dimensional MMIC Technology For Low-cost Millimeter-wave MMICs (Invited paper) . 2000 IEEE GaAs IC Symp. Dig., pp. 153-156 153 - 156 2000年10月査読

B. Piernas, H. Hayashi, K. Nishikawa, K. Kamogawa, and T. Nakagawa . A Broadband and Miniaturized V-Band PHEMT Frequency Doubler . IEEE Microwave and Guided Wave LettersVol. 10 ( No. 7 ) 276 - 278 2000年7月査読

B. Piernas, H. Hayashi, K. Nishikawa, and T. Nakagawa . Improvement of the design of 180o rat-race hybrid . Electronics LettersVol. 36 ( No. 12 ) 1035 - 1036 2000年6月査読

K. Nishikawa, K. Kamogawa, T. Nakagawa, and M. Tanaka . Low-Voltage C-Band SiBJT Single-Chip Receiver MMIC Based on Si 3-D MMIC Technology . IEEE Microwave and Guided Wave LettersVol. 10 ( No. 6 ) 248 - 250 2000年6月査読

K. Kamogawa, K. Nishikawa, I. Toyoda, M. Tokumitsu, M. Hirano, T. Nakagawa, and M. Muraguchi . New Methodology for Microwave/Millimeter-wave MMIC Development . 2000 IEEE MTT-S Int. Microwave Symp. Dig. 1913 - 1916 2000年6月査読

K. Nishikawa, K. Kamogawa, I. Toyoda, and M. Hirano . Three-dimensional MMIC Technology and Application to Millimeter-wave MMICs and Silicon MMICs (Invited paper) . GHz 2000 Symposium Proc. 207 - 210 2000年3月査読

K. Nishikawa, S. Sugitani, K. Inoue, K. Kamogawa, T. Tokumitsu, I. Toyoda, and M. Tanaka . A Compact V-Band 3-D MMIC Single-Chip Down-Converter Using Photosensitive BCB Dielectric Film . IEEE Trans. Microwave Theory Tech.Vol. 47 ( No.12 ) 2512 - 2518 1999年12月査読

I. Toyoda, M. Hirano, M. Tokumitsu, Y. Imai, K. Nishikawa, K. Kamogawam, and S. Sugitani . Quick Development of Multifunctional MMICs Using Three-Dimensional Masterslice MMIC Technology (Invited paper) . IEICE Trans. ElectronicsVol. E82-C ( No. 11 ) 1951 - 1959 1999年11月査読

K. Nishikawa, K. Kamogawa, K. Inoue, K. Onodera, T. Tokumitsu, M. Tanaka, I. Toyoda, and M. Hirano . Miniaturized Millimeter-wave Masterslice 3DMMIC Amplifier and Mixer . IEEE Trans. Microwave Theory Tech.Vol. 47 ( No. 9 ) 1856 - 1862 1999年9月査読

K. Kamogawa, K. Nishikawa, and M. Tanaka . A Novel High-Q Inductor Based on Si 3D MMIC Technology and Its Applications . 1999 IEEE MTT-S Int. Microwave Symp. Dig. 489 - 492 1999年6月査読

K. Nishikawa, K. Kamogawa, I.Toyoda, T. Tokumitsu, and M. Tanaka . C-Band Si 3D MMIC Transceiver for Wireless Applications . 1999 IEEE Radio Frequency Integrated Circuits Symp. Dig. 35 - 38 1999年6月査読

K. Nishikawa, S. Sugitani, K. Inoue, K. Kamogawa, T. Tokumitsu, I. Toyoda, and M. Tanaka . A Compact V-Band 3DMMIC Single-Chip Down-Converter Using Photosensitive BCB Dielectric Film . 1999 IEEE MTT-S Int. Microwave Symp. Dig. 131 - 134 1999年6月査読

T. Tokumitsu, K. Kamogawa, K. Nishikawa, and M. Tanaka . A Line-Unified-FET Combiner/Divider with Built-In 3D Amplifier (LUFET-AMP) and Its Application to a Very Small Injection-Locked Oscillator . 1999 IEEE MTT-S Int. Microwave Symp. Dig. 21 - 24 1999年6月査読

K. Nishikawa, I. Toyoda, and T. Tokumitsu . Compact and Broadband Three-dimensional MMIC Balun . IEEE Trans. Microwave Theory Tech.Vol. 47 ( No. 1 ) 96 - 98 1999年1月査読

K. Kamogawa, K. Nishikawa, I. Toyoda, T. Tokumitsu, and M. Tanaka . A Novel High-Q and Wide-Frequency-Range Inductor Using Si 3-D MMIC Technology . IEEE Microwave and Guided Wave LettersVol. 9 ( No. 1 ) 16 - 18 1999年1月査読

K. Nishikawa, I. Toyoda, K. Kamogawa, T. Tokumitsu, and M. Tanaka . Three-Dimensional Monolithic Microwave Integrated Circuit Technology For Fully Computer-Aided Design-Compatible Monolithic Microwave Integrated Circuit Development . International Journal of RF and Microwave CAEVol. 8 ( No. 6 ) 498 - 506 1998年11月査読

T. Tokumitsu, K. Kamogawa, K. Nishikawa, I. Toyoda, and M. Tanaka . An Extremely Compact, Lossless MMIC Combiner/Divider Using Combination of Line-Unified-FET and Three-Dimensional MMIC Structures . 1998 European Microwave Conf. Proc. 421 - 426 1998年10月査読

K. Inoue, K. Kamogawa, K. Nishikawa, K. Ikuta, K. Onodera, and M. Hirano . Three-dimensional MMIC Interconnect Process Using Photosensitive BCB and STO Capacitors . 1998 European Microwave Conf. Proc. 642 - 647 1998年10月査読

K. Kamogawa, I. Toyoda, T. Tokumitsu, and K. Nishikawa . Wide-Band Subharmonically Injection-Locked Oscillators Using Three-Dimensional MMIC Technology . IEICE Trans. ElectronicsVol. E81-C ( No. 6 ) 848 - 855 1998年6月査読

I. Toyoda, K. Nishikawa, K. Kamogawa, C. Yamaguchi, M. Hirano, K. Onodera, and T. Tokumitsu . X-band Si Bipolar Transistor Single-chip Transceiver Using Three-dimensional MMIC Technology . 1998 IEEE Radio Frequency Integrated Circuits Symp. Dig. 289 - 292 1998年6月査読

K. Nishikawa, K. Kamogawa, K. Inoue, K. Onodera, M. Hirano, T. Tokumitsu, and I. Toyoda . Millimeter-wave Three-dimensional Masterslice MMICs . 1998 IEEE MTT-S Int. Microwave Symp. Dig. 313 - 316 1998年6月査読

K. Nishikawa, I. Toyoda, K. Kamogawa, and T. Tokumitsu . Three-Dimensional Silicon MMIC's Operating up to K-band . IEEE Trans. Microwave Theory Tech.Vol. 46 ( No. 5 ) 677 - 684 1998年5月査読

K. Nishikawa, I. Toyoda, K. Kamogawa, T. Tokumitsu, C. Yamaguchi, and M. Hirano . K-Band Si MMIC Amplifier and Mixer using Three-Dimensional Masterslice MMIC Technology . 1998 IEEE Int. Solid-State Circuits Conf., Digest of Technical Papers 252 - 253 1998年2月査読

M. Nakatsugawa, A. Kanda, H. Okazaki, K. Nishikawa, and M. Muraguchi . Line-Loss and Size Reduction Techniques for Millimeter-Wave RF Front-End Boards by Using a Polyimide/Almina-Ceramic Multilayer Configuration . IEEE Trans. Microwave Theory Tech.Vol. 45 ( No. 12 ) 2308 - 2315 1997年12月査読

I. Toyoda, K. Nishikawa, T. Tokumitsu, K. Kamogawa, C. Yamaguchi, M. Hirano and M. Aikawa . Three-Dimensional Masterslice MMIC on Si Substrate . IEEE Trans. Microwave Theory Tech.Vol.45 ( No.12 ) 2524 - 2529 1997年12月査読

K. Kamogawa, K. Nishikawa, C. Yamaguchi, M. Hirano, I. Toyoda and T. Tokumitsu . Wide-Tuning Range Si Bipolar VCO's Based on Three-Dimensional MMIC Technology . IEEE Trans. Microwave Theory Tech.Vol.45 ( No.12 ) 2436 - 2442 1997年12月査読

T. Tokumitsu, K. Nishikawa, K. Kamogawa, I. Toyoda and K. Nishimura . Three-Dimensional MMIC Technology and Application to Millimeter-Wave MMIC's . 1997 IEEE Topical Symp. Millimeter Waves Dig. 97 - 100 1997年11月査読

M. Hirano, K. Nishikawa, I. Toyoda, S. Aoyama, S. Sugitani and K. Yamasaki . Three-Dimensional Interconnect Technology for Ultra-Compact MMICs . Solid-State ElectronicsVol.41 ( No.10 ) 1451 - 1455 1997年10月査読

T. Tokumitsu, M. Hirano, K. Yamasaki, C. Yamaguchi, K. Nishikawa and M. Aikawa . Highly Integrated Three-Dimensional MMIC Technology Applied to Novel Masterslice GaAs- and Si-MMIC's . IEEE Journal of Solid-State CircuitsVol.32 ( No.9 ) 1334 - 1341 1997年10月査読

K. Nishikawa, I. Toyoda and T. Tokumitsu . Miniaturized Three-Dimensional MMIC K-Band Upconverter . IEEE Microwave and Guided Wave LettersVol.7 ( No.8 ) 230 - 232 1997年8月査読

M. Nakatsugawa, A. Kanda, H. Okazaki, K. Nishikawa, and M. Muraguchi . Line-Loss and Size Reduction Techniques for Millimeter-Wave RF Front-End Boards by Using a Polyimide/Almina-Ceramic Multilayer Configuration . 1997 IEEE MTT-S Int. Microwave Symp. Dig. 509 - 512 1997年5月査読

I. Toyoda, K. Nishikawa, T. Tokumitsu, K. Kamogawa, C. Yamaguchi, M. Hirano and M. Aikawa . Three-Dimensional Masterslice MMIC on Si Substrate . 1997 IEEE Radio Frequency Integrated Circuits Symp. Dig. 113 - 116 1997年5月査読

K. Kamogawa, K. Nishikawa, C. Yamaguchi, M. Hirano, I. Toyoda and T. Tokumitsu . A Very Wide-Tuning Range 5-GHz-Band Si Bipolar VCO Using Three-Dimensional MMIC Technology . 1997 IEEE MTT-S Int. Microwave Symp. Dig. 1221 - 1224 1997年5月査読

K. Onodera, M. Hirano, M. Tokumitsu, I. Toyoda, K. Nishikawa and T. Tokumitsu . Folded U-Shaped Microwire Technology for Ultra-Compact Three-Dimensional MMIC's . IEEE Trans. Microwave Theory Tech.Vol.44 ( No.12 ) 2347 - 2353 1996年12月査読

K. Nishikawa, T. Tokumitsu and I. Toyodawa . Miniaturized Wilkinson Power Divider Using Three-Dimensional MMIC Technology . IEEE Microwave and Guided Wave LettersVol.6 ( No.10 ) 372 - 374 1996年10月査読

M. Aikawa, T. Tokumitsu and K. Nishikawa . Advanced MMIC Technology for The Next Generation-3D MMICs and Master-Slice Technology (Invited paper) . 1996 European Microwave Conf. Proc. 748 - 753 1996年10月査読

K. Nishikawa, K. Kamogawa, T. Tokumitsu, M. Aikawa, M. Hirano and S. Sugitani . Highly-Integrated Three-Dimensional MMIC 20-GHz Single Chip Receiver . 1996 European Microwave Conf. Proc. 199 - 203 1996年10月査読

M. Hirano, K. Nishikawa, I. Toyoda, S. Aoyama, S. Sugitani and K. Yamasaki . 3-D Interconnect Technology for Ultra-Compact MMICs . 1996 Topical Workshop on Heterostructure Microelectronics Proc. 18 - 19 1996年8月査読

T. Tokumitsu, K. Nishikawa, K. Kamogawa, I. Toyoda and M. Aikawa . Three-Dimensional MMIC Technology for Multifunction Integration and Its Possible Application to Masterslice MMIC . 1996 IEEE Microwave and Millimeter-Wave Monolithic Circuits Symp., Dig. 85 - 88 1996年6月査読

M. Hirano, K. Nishikawa, I. Toyoda, S. Aoyama, S. Sugitani and K. Yamasaki . Three-Dimensional Passive Circuit Technology for Ultra-Compact MMIC's . IEEE Trans. Microwave Theory Tech.Vol.43 ( No.12 ) 2845 - 2850 1995年12月査読

K. Nishikawa and T. Tokumitsu . An MMIC Low-Distortion Variable-Gain Amplifier Using Active Feedback . IEEE Trans. Microwave Theory Tech.Vol. 43 ( No. 12 ) 2812 - 2816 1995年12月査読

K. Nishikawa and T. Tokumitsu . An MMIC Low-Distortion Variable-Gain Amplifier Using Active Feedback . 1995 IEEE MTT-S Int. Microwave Symp. Dig., pp. 1619-1622, 1995 1619 - 1622 1995年5月査読

M. Hirano, K. Nishikawa, I. Toyoda, S. Aoyama, S. Sugitani and K. Yamasaki . Three-Dimensional Passive Circuit Technology for Ultra-Compact MMICs . 1995 IEEE MTT-S Int. Microwave Symp. Dig. 1447 - 1450 1995年5月査読

K. Kamogawa, I. Toyoda, K. Nishikawa, and T. Tokumitsu . Characterization of a Monolithic Slot Antenna Using an Electro-Optic Sampling Technique . IEEE Microwave and Guided Wave LettersVol.4 ( No.12 ) 414 - 416 1994年12月査読

K. Nishikawa and T. Tokumitsu . An MMIC Low-Distortion Variable-Gain Amplifier Using Active Feedback . 1994 Asia Pacific Microwave Conf. Proc. 245 - 248 1994年12月査読

I. Toyoda, T. Tokumitsu and K. Nishikawa . A Multilayer MMIC Filter Using Short-Line Meshes (SLMs) . 1994 European Microwave Conf. Proc. 443 - 447 1994年10月査読

M. Hirano, Y. Imai, K. Nishikawa, M. Tokumitsu and K. Asai . Three-Dimensional Passive Elements for Compact GaAs MMICs . IEICE Trans. ElectronicsVol.E76-C ( No.6 ) 961 - 967 1993年6月査読

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