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Affiliation |
Faculty of Engineering, Division of Intelligent Systems Engineering |
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Job Title |
Professor |
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Date of Birth |
1969 |
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Research Fields, Keywords |
Antenna, Microwace Circuits, Noise Measurement(Passive Intermodulation), Radiowave Propagation |
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Mail Address |
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KUGA Nobuhiro
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Education 【 display / non-display 】
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-1997
Yokohama National University
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-1992
Yokohama National University
Degree 【 display / non-display 】
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Doctor of Engineering - Yokohama National University
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Master of Engineering - Yokohama National University
Campus Career 【 display / non-display 】
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2025.10
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Professor
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2007.4-2025.9
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Associate Professor
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2005.4-2007.3
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Associate Professor
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2004.4-2005.3
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Lecturer
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2025.10
Concurrently Yokohama National UniversityGraduate school of Engineering Science Department of Mathematics, Physics, Electrical Engineering and Computer Science Professor
External Career 【 display / non-display 】
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2004.4-2013.9
Tokyo Polytechnic University Faculty of Engineering Part-time Lecturer
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1999.4-2004.3
Tokyo Polytecnic University Faculty of Engineering Lecturer
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1997.4-1999.3
Hitachi Cable Ltd.
Academic Society Affiliations 【 display / non-display 】
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2006.5
エレクトロニクス実装学会
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1994.5
IEEE
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1992.6
The Institute of Electronics, Information and Communication Engineers
Research Areas 【 display / non-display 】
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electronic devices and equipment
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Communication and network engineering
Research Career 【 display / non-display 】
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Study of Antennas for Mobile Communications
Funded Research
Project Year：
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Ceramic chip antenna for Wireless LAN
Cooperative Research
Project Year：
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Dual Polarized Active Antenna
Grant-in-Aid for Scientific Research
Project Year：
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Waveguide Slot Antenna array
Funded Research
Project Year：
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Study of Passive Intermodulation measurement on Microwave circuits.
Cooperative Research
Project Year：
Thesis for a degree 【 display / non-display 】
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A Study of Antennas for Mobile Communications
Nobuhiro. Kuga
1997.3
Doctoral Thesis Single Work
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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。
Papers 【 display / non-display 】
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Kakeru Murata, Iori Serizawa, Kiyoku Hamada, Nobuhiro Kuga
IEICE Transactions on Electronics E108-B ( 10 ) 1 - 9 2025.3 [Reviewed]
DOI Web of Science CiNii Research
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>
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Retrodirective Harmonic Tag Using Van-Atta Array
Kakeru Murata, Nobuhiro Kuga
E108-B ( 8 ) 1 - 8 2025.3 [Reviewed]
DOI Web of Science PubMed CiNii Research
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：The Institute of Electronics, Information and Communication Engineers Joint Work
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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
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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
Review Papers 【 display / non-display 】
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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
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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
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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
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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
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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
Works 【 display / non-display 】
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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
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「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
Industrial Property Rights 【 display / non-display 】
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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
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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
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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
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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
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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
Awards 【 display / non-display 】
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2025.7 電子情報通信学会和文論文誌編集委員会 双指向性を有する低姿勢板状ループ素子を用いた３指向性切り替えアンテナ
Individual or group name of awards：久我宣裕
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Best Paper Award
2024.7 iWEM2024 Retrodirective harmonic tag using Van-Atta array
Individual or group name of awards：Kakeru Murata, Nobuhiro Kuga
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Best Paper Award
2024.7 iWEM2024 Wideband harmonic tag modulating sensor -information by pass-band width
Individual or group name of awards：Kiyoku Hamada, Nobuhiro Kuga, Kun Xiao
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優秀発表賞（ポスター部門グループ①）
2024.3 第9回次世代イニシアティブ廃炉技術カンファレンス 環境にロバストな立体型パッシブ無線センサタグの開発
Individual or group name of awards：内山実則、 久我宣裕
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優秀ポスター部門賞
2024.3 第9回次世代イニシアティブ廃炉技術カンファレンス 環境にロバストな立体型パッシブ無線センサタグの開発
Individual or group name of awards：内山実則、 久我宣裕
Grant-in-Aid for Scientific Research 【 display / non-display 】
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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
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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。
Presentations 【 display / non-display 】
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12GHz帯衛星放送簡易受信用斜め設置円偏波パッチアレーアンテナにおける最低指向性利得の改善手法
石原悠汰，小山拓斗，久我宣裕
電子情報通信学会通信総合大会 2026.3 電子情報通信学会
Event date： 2026.3
Language：Japanese Presentation type：Oral presentation (general)
Venue：九州産業大学 Country：Japan
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A harmonic tag antenna with symmetrized harmonic pattern
Ryunosuke Murofushi, Rikuto Sato, Nobuhiro Kuga
General Conference, IEICE 2026.3 IEICE
Event date： 2026.3
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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中空導波管で給電された円偏波双指向性クロススロットアンテナ
小山拓斗，久我宣裕
電子情報通信学会通信総合大会 2026.3 電子情報通信学会
Event date： 2026.3
Language：Japanese Presentation type：Oral presentation (general)
Venue：九州産業大学 Country：Japan
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Effect of Non-Contact Connectors on the Transmission Characteristics of a Composite Coaxial Tube for High-S/N PIM Measurement
Sota Maruyama, Kiyoku Hamada, Nobuhiro Kuga
2026.3
Event date： 2026.3
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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高S/N PIM測定のための整合周波数微調整可能試料における整合状態の改善
濱田清空，丸山颯太，久我宣裕
電子情報通信学会通信総合大会 2026.3 電子情報通信学会
Event date： 2026.3
Language：Japanese Presentation type：Oral presentation (general)
Venue：九州産業大学 Country：Japan
Preferred joint research theme 【 display / non-display 】
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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
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各種アンテナの研究開発，理論解析
Past of Collaboration and Commissioned Research 【 display / non-display 】
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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
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次世代無線通信用アンテナの開発
Cooperative Research within Japan
Project Year： 2002 - 2003
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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 -
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偏波共用アクティブアンテナの研究
Funded Research on Investiment
Project Year： 2001 - 2003
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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
Charge of on-campus class subject 【 display / non-display 】
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2026 Microwave Engineering Ⅱ
Interfaculty Graduate School of Innovative and Practical Studies
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2026 Microwave Engineering Ⅰ
Interfaculty Graduate School of Innovative and Practical Studies
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2026 Practical System Design
Graduate school of Engineering Science
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2026 Advanced electromagnetic wave design F
Graduate school of Engineering Science
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2026 Advanced electromagnetic wave design S
Graduate school of Engineering Science
Committee Memberships 【 display / non-display 】
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機構デバイス研究専門委員会
2012.5 - 2015.4 副委員長
Committee type：Other
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機構デバイス研究専門委員会
2010.5 - 2012.4 幹事
Committee type：Other
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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
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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
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『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