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Affiliation Department |
Department of Electrical and Mechanical Engineering
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Professor |
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SAKAKIBARA Kunio
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Research Areas
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Communication and network engineering
From Graduate School
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Tokyo Institute of Technology Graduate School, Division of Science and Engineering Dept. of Electrical and Electronic Engineerin Doctor's Course Completed
1993.04 - 1996.03
Country：Japan
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Tokyo Institute of Technology Graduate School, Division of Science and Engineering Dept. of Electrical and Electronic Engineerin Master's Course Completed
1991.04 - 1993.03
Country：Japan
External Career
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TOYOTA Central Research and Development Laboratories Inc. Researcher
1996.04 - 2002.09
Country：Japan
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University of Ulm Guest Researcher
2000.11 - 2001.05
Country：Germany
Papers
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2×2 Lens Array Antenna using Square-Bottom Concave-Convex Lens in 300-GHz Band Reviewed International coauthorship International journal
Bazilah Baharom, Yoshiki Sugimoto, Bakar Rohani, Kunio Sakakibara, Nobuyoshi Kikuma, Yoshihide Yamada, Nurul Huda Abd Rahman
IEEE Open Journal of Antennas and Propagation 4 1074 - 1086 2023.10
Language：English Publishing type：Research paper (scientific journal) Publisher：IEEE
DOI： 10.1109/OJAP.2023.3325055
DOI： 10.1109/OJAP.2023.3325055
Other Link： https://ieeexplore.ieee.org/document/10287222
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Reduction of Surface Reflection on Dielectric Lens Antenna by Matching Periodic Square-Pillars in 300-GHz Band Reviewed International journal
Bazilah Baharom, Ryota Ishihara, Yoshiki Sugimoto, Kunio Sakakibara, Nobuyoshi Kikuma, Takayuki Arai, Takayoshi Suganuma, Tomohiro Saito
IEEE Access 11 8481 - 8491 2023.01
Language：English Publishing type：Research paper (scientific journal) Publisher：IEEE
DOI： 10.1109/ACCESS.2023.3239397
DOI： 10.1109/ACCESS.2023.3239397
Other Link： https://ieeexplore.ieee.org/document/10024932
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Broadband Differential-Line-to-Waveguide Transition in Multi-Layer Dielectric Substrates With an X-Shaped Patch Element in 280 GHz Band Reviewed International journal
Makoto Yamazaki, Yoshiki Sugimoto, Kunio Sakakibara, Nobuyoshi Kikuma
IEEE Transactions on Microwave Theory and Techniques 71 ( 6 ) 2616 - 2624 2023.01
Language：English Publishing type：Research paper (scientific journal) Publisher：IEEE
DOI： 10.1109/TMTT.2022.3232501
DOI： 10.1109/TMTT.2022.3232501
Other Link： https://ieeexplore.ieee.org/document/10008990
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A 76-Gbit/s 265-GHz CMOS Receiver With WR-3.4 Waveguide Interface Reviewed International journal
S. Hara, R. Dong, S. Lee, K. Takano, N. Toshida, A. Kasamatsu, K. Sakakibara, T. Yoshida, S. Amakawa, M. Fujishima
IEEE Journal of Solid-State Circuits 57 ( 10 ) 2988 - 2998 2022.10
Language：English Publishing type：Research paper (scientific journal) Publisher：IEEE
DOI： 10.1109/JSSC.2022.3179560
DOI： 10.1109/JSSC.2022.3179560
Other Link： https://ieeexplore.ieee.org/document/9832950
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Millimeter-wave Butler Matrix Beamforming Circuit using Finline in Double-layer Dielectric Substrate Reviewed International journal
IEEE Open Journal of Antennas and Propagation 1 579 - 589 2020.10
Language：English Publishing type：Research paper (scientific journal) Publisher：IEEE
This article presents a new kind of finline in double-layer dielectric substrate and its beamforming circuit of Butler matrix in the millimeter-wave band. The finline is constructed by inserting a slotline between two dielectric substrate layers. In this configuration, it is bounded within a closed structure composed of a double-layer dielectric substrate and two rows of via-hole arrangement, contributing to low dispersion and low radiation loss of the finline characteristics. The proposed finline design aims to provide a low-complexity and low-loss transmission line which is applied to the Butler matrix design. A 4 x 4 Butler matrix for 4 switchable beams is realized by using the finline in the double-layer dielectric substrate. In addition, a waveguide-to-finline transition is developed as a feeding circuit for the Butler matrix. Characteristics of the proposed transition and the Butler matrix were analyzed by electromagnetic analysis of the finite element method and demonstrated by experiments at 79 GHz. The proposed Butler matrix obtains a wideband characteristic and an acceptable insertion loss of 2.42 dB. The array factor which is calculated from the measured amplitude and phase outputs 4 switchable beams with the beam directions of +14 deg., -46.5 deg., +46.5 deg. and -14 deg., respectively. The proposed beamforming circuit using finline in double-layer dielectric substrate would be attractive for millimeter-wave applications due to its performance and low cost.
DOI： 10.1109/OJAP.2020.3029534
Other Link： https://ieeexplore.ieee.org/document/9217577
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Bandwidth Extension of Planar Microstrip-to-Waveguide Transition by Controlling Transmission Modes Through Via-Hole Positioning in Millimeter-Wave Band Reviewed International journal
Nguyen Thanh Tuan, Kunio Sakakibara, Nobuyoshi Kikuma
IEEE Access 7 161385 - 161393 2019.11
Language：English Publishing type：Research paper (scientific journal) Publisher：IEEE
DOI： 10.1109/ACCESS.2019.2952073
Other Link： https://ieeexplore.ieee.org/document/8894056
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Millimeter-Wave Topside Waveguide-to-Microstrip Transition in Multilayer Substrate Reviewed International journal
Yuki Ishikawa, Kunio Sakakibara, Yuta Suzuki, Nobuyoshi Kikuma
IEEE Microwave and Wireless Components Letters 28 ( 5 ) 380 - 382 2018.03
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal) Publisher：IEEE
A topside waveguide-to-microstrip transition whose waveguide sits on the top of the substrate was developed in the millimeter-wave band. A double-layer substrate was attached at the WR-10 waveguide end. A coupling patch is located on the top surface with spacing of the upper substrate thickness from the microstrip signal line patterned between the upper and the lower substrates. The transmission characteristics of the transition are controlled by the dimensions of the coupling patch and the insertion length of the microstrip signal line into the waveguide. All the dimensions of the transition were optimized by electromagnetic analysis of the finite-element method at 76.5 GHz. The feasibility was confirmed by experiments in this letter.
DOI： 10.1109/LMWC.2018.2812125
Other Link： https://ieeexplore.ieee.org/document/8320283
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Effect of Wall-Surrounded Slot on Stepped Narrow Wall for Bandwidth Enhancement of Partially Parallel-Feeding Waveguide Traveling-Wave Array Reviewed International journal
Yuichi Hirayama, Kunio Sakakibara, Haruki Umemura, Katsuhiro Miyazaki, Nobuyoshi Kikuma
IEEE Transactions on Antennas and Propagation 65 ( 8 ) 3976 - 3985 2017.05
Language：English Publishing type：Research paper (scientific journal)
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RF Performance of Layer-Structured Broadband Passive Millimeter-Wave Imaging System Reviewed International journal
Kunio Sakakibara, Kunihiko Ohkawa, Yutaka Aoki, and Nobuyoshi Kikuma
International Journal of Antennas and Propagation 2016 2015.12
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal) Publisher：Hindawi Publishing Corporation
Low profile and simple configuration are advantageous for RF module in passive millimeter-wave imaging system. High sensitivity over broad operation bandwidth is also necessary to detect right information from weak signal. We propose a broadband layer-structured module with low profile, simple structure, and ease of manufacture. This module is composed of a lens antenna and a detector module that consists of a detector circuit and a broadband microstrip-to-waveguide transition. The module forms a layer structure as a printed substrate with detector circuit is fixed between two metal plates with horn antennas and back-short waveguides. We developed a broadband passive millimeter-wave imaging module composed of a lens antenna and a detector module in this work. The gain and the antenna efficiency were measured, and the broadband operation was observed for the lens antenna. For the detector module, peak sensitivity was 8100 V/W. Furthermore, the detector module recognized a difference in the absorber’s temperature. The designs of the lens antenna and the detector module are presented and the RF performances of these components are reported. Finally, passive millimeter-wave imaging of a car, a human, and a metal plate in clothes is demonstrated in this paper.
Other Link： http://dx.doi.org/10.1155/2016/6894676
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一層基板で構成された広帯域マイクロストリップ線路・クアッドリッジ導波管変換器 Reviewed
山田 康太，榊原 久二男，菊間 信良
電子情報通信学会 和文論文誌 B J98-B ( 3 ) 276 - 284 2015.03
Language：Japanese Publishing type：Research paper (scientific journal)
Books and Other Publications
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波動伝送工学
榊原久二男，太郎丸真，藤森和博（ Role： Joint author , 第2章 マイクロ波伝送線路, 第3章 回路素子）
朝倉書店 2019.03 （ ISBN:978-4-254-22216-6 ）
Total pages：139 Responsible for pages：45 Language：jpn Book type：Scholarly book
マイクロ波についての基本事項を確認し,伝送線路,回路,フィルタまでを解説する。
〔内容〕マイクロ波工学とその基本事項/伝播電磁波の分類/平面波伝送線路/導波管伝送線路/回路素子/共振回路の性質/マイクロ波フィルタ/他 -
Millimeter-wave Application Technologies
（ Role： Supervisor (editorial)）
S&T Publishing Inc. 2018.08 （ ISBN:978-4-907002-73-2 ）
Total pages：298 Responsible for pages：1-17, 98-115 Language：jpn Book type：Scholarly book
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メタマテリアルの技術と応用
石原照也編著（ Role： Joint author , 応用編第5章，pp. 262-273）
シーエムシー出版 2011.08 （ ISBN:978-4-7813-0356-7 ）
Language：jpn Book type：Scholarly book
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Microwave and Millimeter Wave Technology
Igor Minin 他（ Role： Joint author）
InTech 2010.03 （ ISBN:978-953-7619-66-4 ）
Language：eng Book type：Scholarly book
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Radar Technology
Guy Kouemou 他（ Role： Joint author）
In-Tech 2009.12 （ ISBN:978-953-307-029-2 ）
Language：eng Book type：Scholarly book
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メタマテリアル -最新技術と応用-
石原照也 他（ Role： Joint author）
シーエムシー出版 2007.11 （ ISBN:978-4-88231-965-8 ）
Language：jpn Book type：Scholarly book
Presentations
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Broadband Waveguide Transitions and Loss Measurement Technique of Planar Transmission Lines in Millimeter-Wave Band International conference
Kunio Sakakibara, Shumpei Kishi, Azuki Iwamoto, Yoshiki Sugimoto, Takanori Narita, Nobuyoshi Kikuma
2023 International Symposium on Antennas and Propagation (ISAP2023) 2023.10 IEEE
Event date： 2023.10 - 2023.11
Language：English Presentation type：Oral presentation (invited, special)
Venue：Kuala Lumpur Country：Malaysia
Other Link： https://isap2023.apmttemc.org/
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Development of High-Gain and Beam-Scanning Antennas in Sub-THz Wave Band Invited International conference
Kunio Sakakibara
2023 8th International Conference on Space Science and Communications (IconSpace2023) 2023.10 UKM
Event date： 2023.10
Language：English Presentation type：Oral presentation (keynote)
Venue：Penang, Malaysia Country：Malaysia
Other Link： https://www.ukm.my/iconspace/keynote-speaker/
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300GHz 帯補完給電多層基板開口フェーズドアレーのグレーティングローブ抑圧
榊原久二男，富山真帆，山崎敦也，山崎誠，バカルロハニ，杉本義喜，菊間信良
電子情報通信学会 総合大会 2023.03 電子情報通信学会
Event date： 2023.03
Language：Japanese Presentation type：Oral presentation (general)
Venue：芝浦工業大学 Country：Japan
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Planar-Line-to-Waveguide Transitions in Millimeter-Wave and Terahertz-Wave Bands Invited International conference
Kunio Sakakibara
The 2022 Asia-Pacific Microwave Conference (APMC 2022) 2022.11 IEICE
Event date： 2022.11 - 2022.12
Language：English Presentation type：Symposium, workshop panel (nominated)
Venue：Yokohama Country：Japan
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Design of Microstrip-Line-Fed Rotman-lens Beamforming Network at 274 GHz International conference
Takafumi Morioka, Shumpei Kishi, Kunio Sakakibara, Yoshiki Sugimoto, and Nobuyoshi Kikuma
2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM 2022) 2022.08 IEEE AP-S
Event date： 2022.08
Language：English Presentation type：Oral presentation (general)
Venue：Chiba Institute of Technology Country：Japan
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Makoto Yamazaki, Henry Abu Diawuo, Chatchai Chokchai, Kunio Sakakibara, Yoshiki Sugimoto, Nobuyoshi Kikuma
IEICE Technical Report 2022.01 IEICE
Event date： 2022.02
Language：Japanese Presentation type：Oral presentation (general)
Venue：Online Country：Japan
Other Link： https://ken.ieice.org/ken/paper/20220127tC7a/eng/
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Recent development of beam-scanning antenna technologies and implementations for automotive radar systems in millimeter-wave band and above Invited International conference
Kunio SAKAKIBARA
2021 IEEE AP-S Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting IEEE AP-S
Event date： 2021.12
Language：English Presentation type：Symposium, workshop panel (nominated)
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Design of Frequency Selective Surface by Matrix Transformation of Layer Structure to Reduce Return Loss of Thick Dielectric Plate International conference
Tomihiro Ikegami, Kunio Sakakibara, Goro Nomoto, Shota Ino and Nobuyoshi Kikuma
2017 IEEE Conference on Antenna Measurements & Applications (CAMA) IEEE
Event date： 2017.12
Language：English Presentation type：Oral presentation (general)
Venue：Tsukuba, Japan
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Millimeter-Wave Microstrip-to-Waveguide Transition Operating over Broad Frequency Bandwidth
Yusuke Deguchi, Kunio Sakakibara, Nobuyoshi Kikuma and Hiroshi Hirayama
IEEE MTT-S 2005 International Microwave Symposium (IMS2005) 2005.06 IEEE MTT-S
Event date： 2005.06
Language：English Presentation type：Oral presentation (general)
Venue：Long Beach Country：United States
Other Link： https://ieeexplore.ieee.org/document/1517163
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A 2D Beam-Steerable 252-285-GHz 25.8-Gbit/s CMOS Receiver Module Invited
Takeshi Yoshida (Hiroshima Univ.), Shinsuke Hara, Tatsuo Hagino, Mohamed Mubarak, Akifumi Kasamatsu (NICT), Kyoya Takano (Tokyo Univ. of Science), Yoshiki Sugimoto, Kunio Sakakibara (Nagoya Inst. of Tech.), Shuhei Amakawa, Minoru Fujishima (Hiroshima Univ.)
IEICE Technical Report 2023.11 IEICE
Event date： 2023.11
Language：Japanese Presentation type：Oral presentation (invited, special)
Venue：Kumamoto Prefectural Workers' Welfare Hall Country：Japan
Other Link： https://ken.ieice.org/ken/paper/20231116wCYX/eng/
Awards
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2023.11 2023 International Symposium on Antennas and Propagation (ISAP2023) Wideband Waveguide-to-differential-line Transition with Slots and Back-short in Multilayer Substrate
Azuki Iwamoto, Makoto Yamazaki, Yoshiki Sugimoto, Kunio Sakakibara, Shumpei Kishi , Nobuyoshi Kikuma
Award type：Award from international society, conference, symposium, etc. Country：Japan
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Best Student Paper Award
2019.10 2019 International Symposium on Antennas and Propagation (ISAP2019) Broadband Center-Fed Waveguide Linear Array Composed of Double Slotted Cavity Sub-arrays
Haruna Yokoi, Kunio Sakakibara, Nobuyoshi Kikuma
Award type：Award from international society, conference, symposium, etc. Country：Japan
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Student Paper Award
2017.12 2017 IEEE Conference on Antenna Measurements & Applications (CAMA2017) Design of frequency selective surface by matrix transformation of layer structure to reduce return loss of thick dielectric plate
Tomihiro Ikegami, Kunio Sakakibara, Goro Nomoto, Shota Ino, Nobuyoshi Kikuma
Award type：Award from international society, conference, symposium, etc. Country：Japan
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電子情報通信学会通信ソサイエティ活動功労賞
2017.09 電子情報通信学会
榊原久二男
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
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電子情報通信学会通信ソサイエティ活動功労賞
2015.09 電子情報通信学会
榊原久二男
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
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電子情報通信学会 アンテナ・伝播研究会 功労賞
2015.06 電子情報通信学会 アンテナ・伝播研究会
榊原久二男
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
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電子情報通信学会 アンテナ・伝播研究会 功労賞
2014.06 電子情報通信学会 アンテナ・伝播研究会
榊原久二男
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
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電子情報通信学会 アンテナ・伝播研究会 功労賞
2012.06 電子情報通信学会 アンテナ・伝播研究会
榊原久二男
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
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電子情報通信学会 アンテナ・伝播研究会 功労賞
2011.06 電子情報通信学会 アンテナ・伝播研究会
榊原久二男
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
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電子情報通信学会通信ソサイエティ活動功労賞
2010.09 電子情報通信学会通信ソサイエティ
榊原久二男
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
Scientific Research Funds Acquisition Results
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多層基板を用いたロットマンレンズ広帯域２次元マルチビームアレーアンテナの開発
2018.04 - 2021.03
科学研究費補助金 基盤研究(B)
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超低コストプラスチック成型高性能ミリ波導波管スロットアレー平面アンテナの開発
2015.04 - 2018.03
科学研究費補助金 基盤研究(B)
Committee Memberships
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IEICE Technical Committee on Antennas and Propagation Chair
2023.06
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IEEE Associate Editor of IEEE Transactions on Antennas and Propagation
2023.04
Committee type：Academic society
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International Steering Committee of International Symposium on Antennas and Propagation Member
2023.01
Committee type：Academic society
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IEEE Antennas and Propagation Society, New Technology Development Committee Member
2022.01
Committee type：Academic society
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IEICE, Technical Committee on Antennas and Propagation, International Committee Member
2021.06 - 2023.05
Committee type：Academic society
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IEICE IEICE Transactions on Communications, Special Section of ISAP2020, Guest Editor
2021.01 - 2022.01
Committee type：Academic society
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The Institution of Engineering and Technology (IET) Associate Editor of IET Electronics Letters
2020.01
Committee type：Academic society
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International Steering Committee of International Symposium on Antennas and Propagation Secretary
2020.01 - 2021.12
Committee type：Academic society
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IEICE, Technical Committee on Antennas and Propagation, International Committee Secretary
2019.06 - 2021.05
Committee type：Academic society
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IEICE, Technical Committee on Antennas and Propagation, International Committee Chair
2017.06 - 2019.05
Committee type：Academic society