Kawai Tadashi 河合正

… Alternative Names

河合正カワイタダシ

KAWAI Tadashi 河合正

Less

Researcher Number	30275309
Other IDs
External Links
Affiliation (Current)	2025: 兵庫県立大学, 工学研究科, 教授
Affiliation (based on the past Project Information) *help	2014 – 2016: 兵庫県立大学, 工学研究科, 准教授 2005: 兵庫県立大学, 大学院工学研究科, 助教授 2004: 兵庫県立大学, 大学院・工学研究科, 助教授 1998 – 2001: 姫路工業大学, 工学部, 助手 1996: 姫路工業大学, 工学部, 助手
Review Section/Research Field	Principal Investigator Communication/Network engineering / 情報通信工学 Except Principal Investigator 情報通信工学 / Electron device/Electronic equipment
Keywords	Principal Investigator 方向性結合器 / マイクロ波 / 導波管回路 / 多層構造 / 積層 / バンドギャップ / 周期構造 / 電力分配器 / 受動デバイス / ミリ波 / 導波管回路素子 / 平面回路素子 / マイクロ波受動デバイス … More Except Principal Investigator … More hybrid / ハイブリッド / マイクロ波受動回路素子 / マイクロ波 / multiport network / directional coupler / passive component / waveguide / NRD guide / solid integrated circuit / millimeter-wave / 電力分配回路 / マルチポート回路 / ミリ波受動回路素子 / 多分岐回路 / 方向性結合器 / 受動回路素子 / 導波管回路 / NRDガイド / 立体集積回路 / ミリ波 / multi-port network / divider / power combiner / lumped-element component / microwave passive component / microwave / マイクロ波回路 / 多開口回路 / 分配回路 / 電力合成 / 集中定数回路素子 / プリチャープ変調 / 並列リング型 / ラットレース回路 / ニオブ酸リチウム / 電気光学光変調器 / 歪み補償 / 光周波数コム / 波長チャープ / 電気光学変調器 / 電子デバイス・機器 Less

Small-sized light modulator with optical frequency-chirp of which amount can be preset and its applications
- Principal Investigator
  
  Enokihara Akira
- Project Period (FY)
  2014 – 2016
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Electron device/Electronic equipment
- Research Institution
  University of Hyogo
平面導波路型バンドギャプ構造とデバイス応用Principal Investigator
- Principal Investigator
  
  河合正
- Project Period (FY)
  2004 – 2005
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Communication/Network engineering
- Research Institution
  University of Hyogo
Development and design of millimeter-wave solid integrated circuits
- Principal Investigator
  
  OHTA Isao
- Project Period (FY)
  2000 – 2001
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  情報通信工学
- Research Institution
  Himeji Institute of Technology
Lumped-element structures of basic microwave components for large-scale MMIC applications
- Principal Investigator
  
  OHTA Isao
- Project Period (FY)
  1998 – 1999
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  情報通信工学
- Research Institution
  Himeji Institute of Technology
E面平面回路を用いたハイブリッド回路の構成法に関する研究Principal Investigator
- Principal Investigator
  
  河合正
- Project Period (FY)
  1996
- Research Category
  
  Grant-in-Aid for Encouragement of Young Scientists (A)
- Research Field
  
  情報通信工学
- Research Institution
  Himeji Institute of Technology

All 2017 2016 2015 2014 2006 Other

All Journal Article Presentation

[Journal Article] Frequency Chirp Modulation by Electro-Optic Modulator Integrated with Microwave Rat-Race Circuit and Measurement of Chirp Parameter by Using Optical Fiber Dispersion2016
- Author(s)
  R. Nakamura, K. Yamamoto, T. Kawai, A. Enokihara, and T. Kawanishi
- Journal Title
  
  Proceedings of 2016 IEEE MTT-S International Microwave Symposium (IMS)
  
  Volume: - Pages: 1-4
- DOI
  10.1109/mwsym.2016.7539999
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] Parallel Ring-Line Rat-Race Circuit with Very Loose Coupling Utilizing Short-Circuited Coupled Transmission Line2016
- Author(s)
  T. Matsuda, T. Kawai, and A. Enokihara
- Journal Title
  
  Proceedings of 2016 Asia-Pacific Microwave Conference (APMC)
  
  Volume: -
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] Compact Lumped-Element 5-Way Wilkinson Power Divider with Broadband Operation2016
- Author(s)
  Y. Okada, T. Kawai, and A. Enokihara
- Journal Title
  
  Proceedings of 2016 46th European Microwave Conference (EuMC)
  
  Volume: - Pages: 202-205
- DOI
  10.1109/eumc.2016.7824313
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] Design method of unequal Wilkinson power divider using LC-ladder circuits for multi-way power dividers2016
- Author(s)
  Y. Okada, T. Kawai, and A. Enokihara
- Journal Title
  
  Proceedings of 2016 Asia-Pacific Microwave Conference (APMC)
  
  Volume: -
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] LCはしご形回路を用いた広帯域ウィルキンソン電力分配器の設計法2016
- Author(s)
  岡田陽介，河合正，榎原晃
- Journal Title
  
  電子情報通信学会論文誌C-I
  
  Volume: J99-C Pages: 603-610
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] Compact Electro-Optic Single Sideband Modulators Utilizing Miniaturized Branch-Line Couplers on LiNbO<sub>3</sub> Substrate2015
- Author(s)
  Katsuyuki Yamamoto, Tadashi Kawai, Akira Enokihara, Tetsuya Kawanishi
- Journal Title
  
  IEICE Trans. Electron.
  
  Volume: E98.C Issue: 8 Pages: 769-776
- DOI
  10.1587/transele.E98.C.769
- NAID
  130005090379
- ISSN
  0916-8524, 1745-1353
- Language
  English
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] Low Chirp Modulation by Electro-Optic Intensity Modulator Using Microwave 180-Degree Hybrid Directly Formed on LiNbO<sub>3</sub> Substrate2015
- Author(s)
  Akira Enokihara, Masashi Yamamoto, Tadashi Kawai Tetsuya Kawanishi
- Journal Title
  
  IEICE Trans. Electron.
  
  Volume: E98.C Issue: 8 Pages: 777-782
- DOI
  10.1587/transele.E98.C.777
- NAID
  130005090380
- ISSN
  0916-8524, 1745-1353
- Language
  English
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] Wideband lumped-element Wilkinson power dividers using LC-ladder circuits2015
- Author(s)
  Yosuke Okada, Tadashi. Kawai, and Akira Enokihara
- Journal Title
  
  Proceedings of 45th European Microwave Conference (EuMC), 2015
  
  Volume: EuMC2015 Pages: 115-118
- DOI
  10.1109/eumc.2015.7345713
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] Microwave 180-degree Hybrid Formed on LiNbO3 Substrate for Frequency Chirp Modulation by Electro-optic Modulator2015
- Author(s)
  Ryota Nakamura, Tadashi Kawai, Akira Enokihara and Tetsuya Kawanishi
- Journal Title
  
  Proceedings of First PEM International Workshop 2015
  
  Volume: PEM2015
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] Parallel Ring-Line Rat-Race Circuit with Very Loose Coupling Utilizing Composite Right-/Left-Handed Transmission Lines2014
- Author(s)
  Tadashi KAWAI, Yuma SUMITOMO, Akira ENOKIHARA, Isao OHTA, Kei SATOH, Yasunori SUZUKI, Hiroshi OKAZAKI, Shoichi NARAHASHI
- Journal Title
  
  IEICE Trans. Electron.
  
  Volume: E97.C Issue: 10 Pages: 965-971
- DOI
  10.1587/transele.E97.C.965
- NAID
  130004696715
- ISSN
  0916-8524, 1745-1353
- Language
  English
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] Electro-optic single-sideband modulator integrated with branch-line coupler of miniaturized configuration prepared on LiNbO3 substrate2014
- Author(s)
  Katsuyuki Yamamoto, Tadashi Kawai, Akira Enokihara, Tetsuya Kawanishi
- Journal Title
  
  Proceedings of 44th European Microwave Conference (EuMC), 2014
  
  Volume: EuMC35 Pages: 668-671
- DOI
  10.1109/eumc.2014.6986522
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] 終端開放結合線路を外部整合回路に用いた任意電力分配比の広帯域ブランチラインカプラ2014
- Author(s)
  河合　正，榎原　晃，太田　勲，佐藤　圭，鈴木　恭宜，岡崎　浩司，楢橋　祥一
- Journal Title
  
  電子情報通信学会論文誌 C
  
  Volume: J97-C Pages: 492-499
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] LiNbO3 Optical SSB Modulator using Microwave Branch-Line Coupler Miniaturized by Inter-digital Capacitors2014
- Author(s)
  Katsuyuki Yamamoto, Tadashi Kawai, Akira Enokihara, Tetsuya Kawanishi
- Journal Title
  
  Proceedings of International Topical Meeting on Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP), 2014
  
  Volume: ThB-2 Pages: 229-232
- DOI
  10.1109/mwp.2014.6994587
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] Broadband branch-line coupler with very loose coupling utilizing open/short-circuited coupled-transmission lines2014
- Author(s)
  Tadashi KAWAI, Nobuo.NAKAJIMA, Akira ENOKIHARA, Isao OHTA, Kei SATOH, Yasunori SUZUKI, Hiroshi OKAZAKI, Shoichi NARAHASHI
- Journal Title
  
  Proceedings of 44th European Microwave Conference (EuMC), 2014
  
  Volume: EuMC05 Pages: 89-92
- DOI
  10.1109/eumc.2014.6986376
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] Parallel Ring-Line Rat-Race Circuit with Very Loose Coupling Using Short-Circuited Coupled Transmission Lines2014
- Author(s)
  Naoshi Yoshihashi, Tadashi Kawai, Isao Ohta, and Akira Enokihara
- Journal Title
  
  Proceedings of Thailand-Japan Microwave (TJMW) 2014
  
  Volume: TH4-29 Pages: 26-28
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] Low Chirp Electro-optic Intensity Modulation Using Planar Microwave 180-degree Hybrid Directly Prepared on LiNbO3 Substrate2014
- Author(s)
  Akira Enokihara, Masashi Yamamoto, Tadashi Kawai, Tetsuya Kawanishi
- Journal Title
  
  Proceedings of International Topical Meeting on Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP), 2014
  
  Volume: TuEA-7 Pages: 228-290
- DOI
  10.1109/mwp.2014.6994500
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] A circuit construction of parallel ring-line rat-race circuit with very loose coupling utilizing CRLH-TLs2014
- Author(s)
  Tadashi KAWAI, Yosuke DAIMON, Akira ENOKIHARA, Isao OHTA, Kei SATOH, Yasunori SUZUKI, Hiroshi OKAZAKI, Shoichi NARAHASHI
- Journal Title
  
  Proceedings of Asia-Pacific Microwave Conference (APMC) 2014
  
  Volume: WE1B-3 Pages: 22-24
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26420313
[Journal Article] Design of Reduced-Size Branch-Line Couplers with Series Capacitors2006
- Author(s)
  Tadashi Kawai
- Journal Title
  
  Progress In Electromagnetics Research Symposium Abstracts
  
  Pages: 172-172
- Data Source
  KAKENHI-PROJECT-16760308
[Presentation] マイクロ波回路一体型電気光学変調器を用いた少数光周波数コム信号発生2017
- Author(s)
  前田直樹，中村亮太，河合　正，榎原　晃，山本直克，川西哲也
- Organizer
  電子情報通信学会総合大会
- Place of Presentation
  名城大学天白キャンパス（愛知県名古屋市）
- Year and Date
  2017-03-22
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] 電気光学光SSB変調における光分岐比調節による不要側波帯抑圧の検討2017
- Author(s)
  石田三千雄，河合　正，榎原　晃，山本直克，川西哲也
- Organizer
  電子情報通信学会総合大会
- Place of Presentation
  名城大学天白キャンパス（愛知県名古屋市）
- Year and Date
  2017-03-22
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] デュアルパラレル型電気光学変調器を用いた波長チャープ変調による3次相互変調歪補償2017
- Author(s)
  柏木悠汰，高瀬孔佑，河合　正，榎原　晃，瀧澤由佳子，山本直克，川西哲也
- Organizer
  電子情報通信学会総合大会
- Place of Presentation
  名城大学天白キャンパス（愛知県名古屋市）
- Year and Date
  2017-03-22
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] LC梯型回路を用いた広帯域3方向ウィルキンソン電力分配器の構成法2016
- Author(s)
  岡田陽介, 河合正, 榎原晃
- Organizer
  電子情報通信学会マイクロ波研究会
- Place of Presentation
  広島大学（広島県東広島市鏡山）
- Year and Date
  2016-03-02
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] Parallel Ring-Line Rat-Race Circuit with Very Loose Coupling Utilizing Short-Circuited Coupled Transmission Line2016
- Author(s)
  T. Matsuda, T. Kawai, and A. Enokihara
- Organizer
  2016 Asia-Pacific Microwave Conference (APMC)
- Place of Presentation
  ニューデリー（インド）
- Year and Date
  2016-12-05
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] 電気光学変調器による波長チャープ変調を用いた3次相互変調歪補償の検討2016
- Author(s)
  前田幸子、河合　正、榎原　晃、山本直克、川西哲也
- Organizer
  電子情報通信学会総合大会
- Place of Presentation
  九州大学伊都キャンパス（福岡県福岡市西区）
- Year and Date
  2016-03-15
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] Design method of unequal Wilkinson power divider using LC-ladder circuits for multi-way power dividers2016
- Author(s)
  Y. Okada, T. Kawai, and A. Enokihara
- Organizer
  2016 Asia-Pacific Microwave Conference (APMC)
- Place of Presentation
  ニューデリー（インド）
- Year and Date
  2016-12-05
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] 電気光学変調器による波長チャープ変調と光ファイバの波長分散を用いたチャープパラメータの測定2016
- Author(s)
  中村亮太、山本勝之、河合　正、榎原　晃、山本直克、川西哲也
- Organizer
  電子情報通信学会総合大会
- Place of Presentation
  九州大学伊都キャンパス（福岡県福岡市西区）
- Year and Date
  2016-03-15
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] 波長チャープを用いた電気光学変調器の3次相互変調歪補償法の検討2016
- Author(s)
  高瀬孔佑, 前田幸子, 河合正, 榎原晃, 瀧澤由佳子, 山本直克, 川西哲也
- Organizer
  電子情報通信学会マイクロ波ミリ波フォトニクス研究会
- Place of Presentation
  機械振興会館（東京都港区）
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] LCはしご形回路を用いたウィルキンソン型非等分配回路の設計2016
- Author(s)
  岡田陽介, 河合正, 榎原晃
- Organizer
  電子情報通信学会マイクロ波研究会
- Place of Presentation
  防衛大学校（神奈川県横須賀市）
- Year and Date
  2016-12-15
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] 多段LC梯子型回路を用いたマルチバンド電力分配器の構成法2016
- Author(s)
  岡田陽介、河合　正、榎原　晃
- Organizer
  電子情報通信学会総合大会
- Place of Presentation
  九州大学伊都キャンパス（福岡県福岡市西区）
- Year and Date
  2016-03-15
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] 電気光学変調器を用いた低変調指数動作での光周波数コム信号発生の検討2016
- Author(s)
  前田直樹、中村亮太、河合　正、榎原　晃、山本直克、川西哲也
- Organizer
  電子情報通信学会総合大会
- Place of Presentation
  九州大学伊都キャンパス（福岡県福岡市西区）
- Year and Date
  2016-03-15
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] ラットレース回路一体型電気光学変調器による波長チャープ光変調と光ファイバ伝送特性の評価2016
- Author(s)
  中村亮太, 山本勝之, 河合正, 榎原晃, 山本直克, 川西哲也
- Organizer
  電子情報通信学会マイクロ波・ミリ波フォトニクス研究会
- Place of Presentation
  神戸市産業振興センター（兵庫県神戸市中央区）
- Year and Date
  2016-01-28
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] Frequency Chirp Modulation by Electro-Optic Modulator Integrated with Microwave Rat-Race Circuit and Measurement of Chirp Parameter by Using Optical Fiber Dispersion2016
- Author(s)
  Ryota Nakamura, Katsuyuki Yamamoto, Tadashi Kawai, Akira Enokihara Naokatsu Yamamoto and Tetsuya Kawanishi
- Organizer
  International Microwave Symposium 2016
- Place of Presentation
  サンフランシスコ（アメリカ）
- Year and Date
  2016-05-17
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] Compact Lumped-Element 5-Way Wilkinson Power Divider with Broadband Operation2016
- Author(s)
  Y. Okada, T. Kawai, and A. Enokihara
- Organizer
  2016 46th European Microwave Conference (EuMC)
- Place of Presentation
  ロンドン（イギリス）
- Year and Date
  2016-10-03
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] LC梯子型回路を用いた広帯域ウィルキンソン電力分配器の設計法2015
- Author(s)
  岡田陽介, 河合正, 榎原晃
- Organizer
  電子情報通信学会マイクロ波研究会
- Place of Presentation
  東京理科大葛飾キャンパス（東京都葛飾区）
- Year and Date
  2015-12-17
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] Microwave 180-degree Hybrid Formed on LiNbO3 Substrate for Frequency Chirp Modulation by Electro-optic Modulator2015
- Author(s)
  Ryota Nakamura, Tadashi Kawai, Akira Enokihara and Tetsuya Kawanishi
- Organizer
  First PEM International Workshop 2015
- Place of Presentation
  同志社大学（京都府京都市）
- Year and Date
  2015-11-27
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] Wideband lumped-element Wilkinson power dividers using LC-ladder circuits2015
- Author(s)
  Yosuke Okada, Tadashi. Kawai, and Akira Enokihara
- Organizer
  45th European Microwave Conference (EuMC), 2015
- Place of Presentation
  パリ（フランス）
- Year and Date
  2015-09-07
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] 電気光学変調器での波長チャープの時間変化の解析と微小チャープ量の評価方法の検討2014
- Author(s)
  榎原晃, 河合正, 川西哲也
- Organizer
  電子情報通信学会マイクロ波・ミリ波フォトニクス研究会
- Place of Presentation
  札幌コンベンションセンター（北海道札幌市）
- Year and Date
  2014-04-07
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] LiNbO3基板上でのブランチラインカップラの小型化の検討と電気光学光SSB変調素子への応用2014
- Author(s)
  山本　勝之，榎原　晃，河合正，川西哲也
- Organizer
  輻射科学研究会
- Place of Presentation
  大阪大学（大阪府豊中市）
- Year and Date
  2014-08-27
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] マッハツェンダー型電気光学変調器における動作パラメータの3次相互変調歪が与える影響の検討2014
- Author(s)
  早川達也, 河合正, 榎原晃, 川西哲也
- Organizer
  電子情報通信学会マイクロ波・ミリ波フォトニクス研究会
- Place of Presentation
  札幌コンベンションセンター（北海道札幌市）
- Year and Date
  2014-04-07
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] 終端短絡結合線路を用いた並列リング型疎結合ラットレース回路
- Author(s)
  吉橋　是，河合　正，太田　勲，榎原　晃
- Organizer
  電子情報通信学会総合大会
- Place of Presentation
  立命館大学（滋賀県草津市）
- Year and Date
  2015-03-10 – 2015-03-13
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] 縦列接続型SIW多重電力分配回路の設計
- Author(s)
  高橋広次, 河合正, 岸原充佳, 太田勲, 榎原晃
- Organizer
  電子情報通信学会マイクロ波研究会
- Place of Presentation
  室蘭工業大（北海道室蘭市）
- Year and Date
  2014-07-17 – 2014-07-18
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] 電気光学変調器によるチャープ変調のための非等分配ラットレース回路のLiNbO3基板上への作製
- Author(s)
  山本　勝之，榎原　晃，河合正，川西哲也
- Organizer
  電子情報通信学会ソサイエティ大会
- Place of Presentation
  徳島大学（徳島県徳島市）
- Year and Date
  2014-09-23 – 2014-09-26
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] A circuit construction of parallel ring-line rat-race circuit with very loose coupling utilizing CRLH-TLs
- Author(s)
  Tadashi KAWAI, Yosuke DAIMON, Akira ENOKIHARA, Isao OHTA, Kei SATOH, Yasunori SUZUKI, Hiroshi OKAZAKI, Shoichi NARAHASHI
- Organizer
  2014 Asia-Pacific Microwave Conference (APMC)
- Place of Presentation
  仙台国際センター（宮城県仙台市）
- Year and Date
  2014-11-04 – 2014-11-07
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] 電気光学変調器の動作パラメータと3次相互変調歪の関係の検討
- Author(s)
  早川達也，榎原　晃，河合正，川西哲也
- Organizer
  電子情報通信学会ソサイエティ大会
- Place of Presentation
  徳島大学（徳島県徳島市）
- Year and Date
  2014-09-23 – 2014-09-26
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] Broadband branch-line coupler with very loose coupling utilizing open/short-circuited coupled-transmission lines
- Author(s)
  Tadashi KAWAI, Nobuo.NAKAJIMA, Akira ENOKIHARA, Isao OHTA, Kei SATOH, Yasunori SUZUKI, Hiroshi OKAZAKI, Shoichi NARAHASHI
- Organizer
  44th European Microwave Conference (EuMC), 2014
- Place of Presentation
  ローマ（イタリア）
- Year and Date
  2014-10-05 – 2014-10-10
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] 終端開放/短絡結合線路を用いた広帯域疎結合ブランチラインカプラの耐電力性に関する検討
- Author(s)
  河合　正，中島宣雄，榎原　晃，太田　勲，佐藤　圭，鈴木恭宜，岡崎浩司，楢橋祥一
- Organizer
  電子情報通信学会ソサイエティ大会
- Place of Presentation
  徳島大学（徳島県徳島市）
- Year and Date
  2014-09-23 – 2014-09-26
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] CRLH線路を用いた並列リング型疎結合ラットレース回路の一構成法
- Author(s)
  大門洋輔, 河合正, 榎原晃, 太田勲, 佐藤圭, 鈴木恭宜, 岡崎浩司, 楢橋祥一
- Organizer
  電子情報通信学会マイクロ波研究会
- Place of Presentation
  同志社大（京都府京都市）
- Year and Date
  2014-05-22 – 2014-05-23
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] Parallel Ring-Line Rat-Race Circuit with Very Loose Coupling Using Short-Circuited Coupled Transmission Lines
- Author(s)
  Naoshi Yoshihashi, Tadashi Kawai, Isao Ohta, and Akira Enokihara
- Organizer
  2014 Thailand-Japan Microwave Conference (TJMW)
- Place of Presentation
  バンコク(タイ)
- Year and Date
  2014-11-26 – 2014-11-28
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] Low Chirp Electro-optic Intensity Modulation Using Planar Microwave 180-degree Hybrid Directly Prepared on LiNbO3 Substrate
- Author(s)
  Akira Enokihara, Masashi Yamamoto, Tadashi Kawai, Tetsuya Kawanishi
- Organizer
  International Topical Meeting on Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP), 2014
- Place of Presentation
  札幌コンベンションセンター（北海道札幌市）
- Year and Date
  2014-10-20 – 2014-10-23
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] 23GHz帯ラットレース回路を用いた低チャープ電気光学変調器
- Author(s)
  國廣良太，榎原　晃，河合正，川西哲也
- Organizer
  電子情報通信学会ソサイエティ大会
- Place of Presentation
  徳島大学（徳島県徳島市）
- Year and Date
  2014-09-23 – 2014-09-26
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] LiNbO3 Optical SSB Modulator using Microwave Branch-Line Coupler Miniaturized by Inter-digital Capacitors
- Author(s)
  Katsuyuki Yamamoto, Tadashi Kawai, Akira Enokihara, Tetsuya Kawanishi
- Organizer
  International Topical Meeting on Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP), 2014
- Place of Presentation
  札幌コンベンションセンター（北海道札幌市）
- Year and Date
  2014-10-20 – 2014-10-23
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] 波長チャープ変調のための非等分配ラットレース回路一体型電気光学変調素子
- Author(s)
  山本　勝之，榎原　晃，河合正，川西哲也
- Organizer
  電子情報通信学会総合大会
- Place of Presentation
  立命館大学（滋賀県草津市）
- Year and Date
  2015-03-10 – 2015-03-13
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] マッハツェンダー型電気光学変調器の波長チャープ評価とゼロチャープ変調の検討
- Author(s)
  山本将史, 河合正, 榎原晃, 川西哲也
- Organizer
  電子情報通信学会マイクロ波・ミリ波フォトニクス研究会
- Place of Presentation
  大阪大学（大阪府豊中市）
- Year and Date
  2015-01-29 – 2015-01-30
- Data Source
  KAKENHI-PROJECT-26420313
[Presentation] Electro-optic single-sideband modulator integrated with branch-line coupler of miniaturized configuration prepared on LiNbO3 substrate
- Author(s)
  Katsuyuki Yamamoto, Tadashi Kawai, Akira Enokihara, Tetsuya Kawanishi
- Organizer
  44th European Microwave Conference (EuMC), 2014
- Place of Presentation
  ローマ（イタリア）
- Year and Date
  2014-10-05 – 2014-10-10
- Data Source
  KAKENHI-PROJECT-26420313

1. OHTA Isao (80047612)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
2. Enokihara Akira (10514383)

# of Collaborated Projects: 1 results

# of Collaborated Products: 50 results

Kawai Tadashi 河合 正

河合 正 カワイ タダシ

KAWAI Tadashi 河合 正

Research Projects

Research Products

Co-Researchers

Small-sized light modulator with optical frequency-chirp of which amount can be preset and its applications

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平面導波路型バンドギャプ構造とデバイス応用Principal Investigator

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Development and design of millimeter-wave solid integrated circuits

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Lumped-element structures of basic microwave components for large-scale MMIC applications

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E面平面回路を用いたハイブリッド回路の構成法に関する研究Principal Investigator

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[Journal Article] Frequency Chirp Modulation by Electro-Optic Modulator Integrated with Microwave Rat-Race Circuit and Measurement of Chirp Parameter by Using Optical Fiber Dispersion2016

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[Journal Article] Parallel Ring-Line Rat-Race Circuit with Very Loose Coupling Utilizing Short-Circuited Coupled Transmission Line2016

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[Journal Article] Compact Lumped-Element 5-Way Wilkinson Power Divider with Broadband Operation2016

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[Journal Article] Design method of unequal Wilkinson power divider using LC-ladder circuits for multi-way power dividers2016

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[Journal Article] LCはしご形回路を用いた広帯域ウィルキンソン電力分配器の設計法2016

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[Journal Article] Compact Electro-Optic Single Sideband Modulators Utilizing Miniaturized Branch-Line Couplers on LiNbO<sub>3</sub> Substrate2015

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[Journal Article] Low Chirp Modulation by Electro-Optic Intensity Modulator Using Microwave 180-Degree Hybrid Directly Formed on LiNbO<sub>3</sub> Substrate2015

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[Journal Article] Wideband lumped-element Wilkinson power dividers using LC-ladder circuits2015

Author(s)

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[Journal Article] Microwave 180-degree Hybrid Formed on LiNbO3 Substrate for Frequency Chirp Modulation by Electro-optic Modulator2015

Kawai Tadashi 河合正

河合正カワイタダシ

KAWAI Tadashi 河合正