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Researchers
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KUGA Nobuhiro
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Yokohama National University
Yokohama National University
Doctor of Engineering - Yokohama National University
Master of Engineering - Yokohama National University
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Associate Professor
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Associate Professor
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Lecturer
Concurrently Yokohama National UniversityGraduate school of Engineering Science Department of Mathematics, Physics, Electrical Engineering and Computer Science Associate Professor
Concurrently Yokohama National UniversityCollege of Engineering Science Department of Mathematics, Physics, Electrical Engineering and Computer Science Associate Professor
Tokyo Polytechnic University Faculty of Engineering Part-time Lecturer
Tokyo Polytecnic University Faculty of Engineering Lecturer
Hitachi Cable Ltd.
エレクトロニクス実装学会
IEEE
The Institute of Electronics, Information and Communication Engineers
Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electron device and electronic equipment
Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Communication and network engineering
Study of Passive Intermodulation measurement on Microwave circuits.
Cooperative Research
Project Year：
Study of Antennas for Mobile Communications
Funded Research
Project Year：
Ceramic chip antenna for Wireless LAN
Cooperative Research
Project Year：
Dual Polarized Active Antenna
Grant-in-Aid for Scientific Research
Project Year：
Waveguide Slot Antenna array
Funded Research
Project Year：
A Study of Antennas for Mobile Communications
Nobuhiro. Kuga
1997.3
Doctoral Thesis Single Work
移動体通信用小型平面アンテナの研究
久我 剛嗣
1994.3
Master Thesis Single Work
横浜国立大学
移動体通信用各種移動端末用平面アンテナを考案し，それらの動作原理・基本特性を実験および数値解析により解析した。
Kakeru Murata, Iori Serizawa, Kiyoku Hamada, Nobuhiro Kuga
IEICE Transactions on Electronics E108-B ( 10 ) 1 - 9 2025.3 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：一般社団法人 電子情報通信学会 Joint Work
<p>In this paper, we propose a sensor node using a unidirectional harmonic antenna that can acquire remote sensor information without complex digital circuits. The antenna suitable for the harmonic sensor node is characterized by utilizing a wideband E-shaped element to suppress pattern degradation at harmonic frequencies. First, through basic investigations where the sensor is modeled as a variable voltage source, we demonstrate that sensor voltage information can be remotely detected based on the transmission zero frequency. Next, using a sensor node incorporating a temperature sensor and energy harvesting circuit as an example, we show that the temperature in a remote location can be detected from the stopband frequency, thereby verifying the effectiveness of the proposed method. These findings are validated through harmonic balance analysis, electromagnetic field simulations, and RF circuit simulations.</p>
Retrodirective Harmonic Tag Using Van-Atta Array
Kakeru Murata, Nobuhiro Kuga
E108-B ( 8 ) 1 - 8 2025.3 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Joint Work
Ryunosuke Murofushi, Nobuhiro Kuga, Eiji Hanayama
IEICE Transactions on Electronics C J107-C ( 4 ) 107 - 115 2023.12 [Reviewed]
DOI Web of Science CiNii Research
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electronics, Information and Communication Engineers Joint Work
Non-contact PIM measurement method using balanced transmission lines for impedance matched PIM measurement systems
Ryunosuke Muroushi, Nobuhiro Kuga, Eiji Hanayama
IEICE TRANSACTIONS ON COMMUNICATIONS E106-B ( 12 ) 1 - 8 2023.8 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Joint Work
In this paper, a concept of non-contact PIM evaluation
method using balanced transmission lines is proposed for impedancematched PIM measurement systems. In order to evaluate the PIM characteristics of a MSL by using its image model, measurement system using balanced transmission line is introduced. In non-contact PIM measurement, to reduce undesirable PIM generation by metallic contact and the PIM-degradation in repeated measurements, a non-contact connector which is applicable without any design changes in DUT is introduce. The threedimensional balun composed of U-balun and balanced transmission line is also proposed so that it can be applicable to conventional unbalanced PIM measurement systems. In order to validate the concept of the proposed system, a sample using nickel producing high PIM is introduced. In order to avoid the effect of the non-contact connection part on observed PIM, a sample-configuration that PIM-source exists outside of the non-contact connection part is introduced. It is also shown using a sample using copper that, nickel-sample can be clearly differentiated in PIM characteristics while it is equivalent to low-PIM sample in scattering-parameter characteristics. Finally, by introducing the TRL-calibration and by extracting inherent DUTcharacteristics from whole-system characteristics, a method to estimate the PIM characteristics of DUT which cannot be taken directly in measurement is proposed.
Non-contact PIM evaluation method using a standing wave coaxial tube
Daijiro Ishibashi, Nobuhiro Kuga
IEICE TRANSACTIONS on Electronics E95C ( 9 ) 1508 - 1514 2012.9 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：The institute of electronics, information and communication engineers Joint Work
電波吸収体のPIM特性
久我 宣裕
工業材料 Vol.67 ( 8 ) 50 - 53 2019.8
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution) Publisher：アシザワ・ファインテック株式会社 Single Work
反射板を用いた部分球面走査放射効率測定
2006年電子情報通信学会通信ソサエティ大会講演論文集 B ( B-1-143 ) B - 1-143 2006.9
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other) Joint Work
鉛フリーはんだ鍍金された導体材料の受動相互変調ひずみ特性
2006年電子情報通信学会エレクトロニクスソサエティ大会講演論文集 C2 ( CS-5-1 ) CS - 5-1 2006.9
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other) Joint Work
金属材料で発生する相互変調ひずみの温度依存性
2006年電子情報通信学会エレクトロニクスソサエティ大会講演論文集 C ( CS-5-2 ) CS - 5-2 2006.9
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other) Joint Work
先端短絡伝送線路を用いたマイクロ波電気接点のPIM特性評価
2006年電子情報通信学会エレクトロニクスソサエティ大会講演論文集 C ( CS-5-3 ) CS - 5-3 2006.9
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other) Joint Work
アンテナ・無線ハンドブック オーム社
2006.11
Work type：Other
分担執筆
「フォトニック結晶研究の現状と将来展望」(財)光産業技術振興協会
2000
Work type：Other
受動相互変調ひずみの測定方法および測定システム
久我宣裕，山本泰之，土井充，遠藤充哲
Applicant：国立大学法人 横浜国立大学
Application no：PCT/JP2007/053438 Date applied：2007.3
Country of applicant：Foreign country
放射効率測定装置
久我宣裕，新井宏之
Applicant：横浜国立大学
Application no：2006-241872 Date applied：2006.9
Country of applicant：Domestic
アンテナ装置
久我宣裕，新井宏之，玉置亮太郎，柳尾幸二，酒井信智
Applicant：三菱マテリアル，横浜国立大学
Application no：2006-004546 Date applied：2006.1.12
Announcement no：2007-189385 Date announced：2007.7.26
Patent/Registration no：4709015 Date issued：2011.3.25
Country of applicant：Domestic
プリント基板型モノポールアンテナ
久我宣裕，新井宏之，矢野敏明
Applicant：国立大学法人 横浜国立大学， 日本無線
Application no：特願2005-302706 Date applied：2005.10.18
Announcement no：特開2007-116232 Date announced：2007.5.1
Patent/Registration no：3941069 Date issued：2007.4.13
Country of applicant：Domestic
分配器および方法、プラズマ処理装置および方法、並びに、ＬＣＤの製造方法
大見忠弘,後藤尚久,久我宣裕,廣江 昭彦
Applicant：東京エレクトロン，大見忠弘，後藤尚久
Application no：特願2006-510833 Date applied：2004.3.10
Patent/Registration no：特許第4134226 Date issued：2008.6.6
Country of applicant：Domestic
終端機能を有する共振器を用いた超高SN比非接触PIM測定法の研究
2025.4 - 2028.3
文部科学省 科学研究費補助金 Grant-in-Aid for Scientific Research(C)
Investigator(s)：久我宣裕
Authorship：Principal investigator Grant type：Competitive
実運用時の電磁界分布を考慮した非接触PIM測定法に関する研究
2021.4 - 2024.3
Grant-in-Aid for Scientific Research(C)
Investigator(s)：久我宣裕
Authorship：Principal investigator Grant type：Competitive
線形回路に残留する微弱な電磁気的非線形性により発生するPIMノイズは、移動体通信システム基地局アンテナ系において発生し、受信障害の原因となる。特にPIMは実装状態に敏感であるため、予想できない通信速度の低下や、実効的カバーエリアの減少にもつながる。
本研究は、このPIMノイズの測定精度の飛躍的改善を目的として実施される。具体的には、PIM発生要因の一つである終端やコネクタ接続を排除し、かつ実運用時の電磁界分布を考慮できる新たな非接触PIM測定法を実現する。また従来の終端を用いた測定法との互換性を確立する。
電磁波曝露されたDCファンにおけるIM源特定に関する検討
安藤佑悟・久我宣裕
電子情報通信学会エレクトロニクスソサイティ 総合大会
Event date： 2019.3
Language：Japanese Presentation type：Oral presentation (general)
安藤佑悟・久我宣裕， 電磁波曝露されたDCファンにおけるIM源特定に関する検討，」 信学エレソ大 C-2-34，2019年3月
間隙付きループ装荷パッチアンテナの放射効率の円偏波放射特性依存性評価
髙山侑紀・久我宣裕
電子情報通信学会エレクトロニクスソサイティ 総合大会
Event date： 2019.3
Language：Japanese Presentation type：Oral presentation (general)
髙山侑紀・久我宣裕, 「 間隙付きループ装荷パッチアンテナの放射効率の円偏波放射特性依存性評価，」信学通ソ大 B-1-107， 2019年3月
板状ループアンテナを用いた板状磁性体の材料定数測定
石井佑典・久我宣裕
電子情報通信学会エレクトロニクスソサイティ 総合大会
Event date： 2019.3
Language：Japanese Presentation type：Oral presentation (general)
石井佑典・久我宣裕，「板状ループアンテナを用いた板状磁性体の材料定数測定，」信学エレソ大 C-2-36， 2019年3月
ギャップ付ループとパッチ素子を用いた狭幅円偏波アンテナ
髙山侑紀 久我宣裕
電子情報通信学会 研究発表会
Event date： 2018.11
Language：Japanese Presentation type：Oral presentation (general)
髙山侑紀 久我宣裕，「ギャップ付ループとパッチ素子を用いた狭幅円偏波アンテナ，」信学技報, vol. 118, no. 310, AP2018-106, pp. 23-28, 2018年11月
Non-contact PIM Measurement of Large Samples using a Small Anechoic Box
Hirotaka Suzuki, Nobuhiro Kuga
URSI Asia-Pacific Radio Science Conference (URSI AP-RASC) 2016
Event date： 2016.8
Language：English Presentation type：Oral presentation (general)
Venue：Seoul, South Korea
アンテナ，伝送線路，コネクタ等受動回路における受動相互変調歪（PIM）評価技術，測定
各種アンテナの研究開発，理論解析
平面型円偏波アレーアンテナの開発
Funded Research offered by Enterprises
Project Year： 2002 - 2004
次世代無線通信用アンテナの開発
Cooperative Research within Japan
Project Year： 2002 - 2003
移動体通信用アンテナの小型化，高性能化
Funded Research offered by Enterprises
Project Year： 2002 -
偏波共用アクティブアンテナの研究
Funded Research on Investiment
Project Year： 2001 - 2003
各種受動装置における受動相互変調歪の評価法および低減法
Cooperative Research within Japan
Project Year： 1999 - 2003
2025 Electronic Circuits Ⅱ
College of Engineering Science
2025 Analog Circuit Design
College of Engineering Science
2025 Laboratory Ⅰ for Electrical and Computer Engineering
College of Engineering Science
2025 Laboratory D for Electrical and Computer Engineering
College of Engineering Science
2025 Advanced Electrical and Computer Engineering
College of Engineering Science
機構デバイス研究専門委員会
2012.5 - 2015.4 副委員長
Committee type：Other
機構デバイス研究専門委員会
2010.5 - 2012.4 幹事
Committee type：Other
アンテナ伝搬研究会専門委員会
2008.5 - 2012.4 専門委員
Committee type：Other
機構デバイス研究会専門委員会
2008.5 - 2010.4 専門委員
Committee type：Other
『Special Section on 2006 International Symposium on Antennas and Propagation』英文論文小特集編集委員会
2006.12 - 2007.9 編集委員
Committee type：Other
