論文

• T. Tomura, J. Hirokawa, M. Ali, G. Carpintero. Millimeter-wave multiplexed wideband wireless link using rectangular-coordinate orthogonal multiplexing (ROM) antennas, J. Lightw. Technol., vol. 39, no. 24, pp. 7821-7830, Dec. 2021.
• Miao Zhang, So Matsueda, Jiro Hirokawa, Makoto Ando. Realization of a Beam-Tilted Circularly-Polarized Corporate-Fed Waveguide Slot Array in the 60-GHz Band, IEEE Trans. Antennas Propag., vol. 69, no. 12, pp. 8967-8972, Dec. 2021.
• Akihiko Hirata, Koichiro Itakura, Taiki Higashimoto, Yuta Uemura, Tadao Nagatsuma, Takashi Tomura, Jiro Hirokawa, Norihiko Sekine, Issei Watanabe, Akifumi Kasamatsu. Transmission Characteristics Control of 120 GHz-band Bandstop Filter by Coupling Alignment-Free Lattice Pattern, IEICE Trans. Electron., vol. 104, no. 10, pp. 587-595, Oct. 2021.
• Jiro Hirokawa, Nelson J. G. Fonseca. Generalized One-Dimensional Parallel Switching Matrices With an Arbitrary Number of Beams, IEEE J. Microw., vol. 1, no. 4, Oct. 2021.
• Miao Zhang, Tatsuya Yamamoto, Jiro Hirokawa, Makoto Ando. A Wideband Circularly-Polarized Corporate-fed Waveguide Aperture Array in the 60-GHz Band, IEEE Antennas Wirel. Propag. Lett., vol. 20, no. 9, pp. 1824-1828, Sept. 2021.
• Jiyu He, Yaxiang Wu, Dan Chen, Miao Zhang, Jiro Hirokawa, Qinghuo Liu. Realization of a Wideband Series-Fed 4 x 4-Element Waveguide Slot Array in the X-band, IEEE Access, vol. 9, pp. 83666-83675, June 2021.
• Jun Goto, Makoto Matsuki, Takashi Maruyama, Toru Fukazawa, Naofumi Yoneda, Jiro Hirokawa. Design of the Traveling-Wave Series-Fed Microstrip Antenna Array with Power Control Slits of Unequal Inter-Element Spacing, IEICE Trans. Commun., vol. 104, no. 6, pp. 624-629, June 2021.
• Miao Zhang, Masahiro Wakasa, Koji Toyosaki, Kiyomichi Araki, Jiro Hirokawa, Makoto Ando. Analysis of Intersymbol Interference Characterized by the Large Array Antennas Adopted in a 60-GHz-Band Gigabit Compact-Range Wireless Access System, IEEE Access, vol. 9, pp. 80077-80087, May 2021.
• S. Sakurai, J. G. N. Rahmeier, T. Tomura, J. Hirokawa, S. Gupta. Millimeter-wave Huygens' transmit-arrays based on coupled metallic resonators, IEEE Trans. Antennas Propag., vol. 69, no. 5, pp. 2686-2696, May 2021.
• N. J. G. Fonseca, S. Gomanne, P. Castillo-Tapia, O. Quevedo-Teruel, T. Tomura, J. Hirokawa. Connecting networks for two-dimensional butler matrices generating a triangular lattice of beams, IEEE J. Microw., vol. 1, no. 2, pp. 646-658, Apr. 2021.
• K. Itakura, A. Hirata, M. Sonoda, T. Higashimoto, T. Nagatsuma, T. Tomura, J. Hirokawa, N. Sekine, I. Watanabe, A. Kasamatsu. Control of 120-GHz-band split ring resonator filter by coupling lattice pattern substrate, IEICE Trans. Electron., vol. E104-C, no. 3, pp. 102-111, Mar. 2021.
• Xin Xu, Agnese Mazzinghi, Angelo Freni, Jiro Hirokawa. Simultaneous Generation of Three OAM modes by using a RLSA Fed by a Waveguide Circuit for 60-GHz-band Radiative Near-field Region OAM Multiplexing, IEEE Trans. Antennas Propagat., vol. 69, no. 3, pp. 1249-1259, Mar. 2021.
• Kouhei Jitousho, Takashi Tomura, Jiro Hirokawa. Improvement of isolation between transmitting and receiving antennas of E-plane arranged waveguide slot arrays by using layers of slit pairs with half-wavelength spacing, IEICE Communications Express, Vol.10, No.2, 93–98, Feb. 2021.
• Takashi Tomura, Jiro Hirokawa, Minoru Furukawa, Teruo Fujiwara, Naoki Shinohara. Eight-Port Feed Radial Line Slot Antenna for Wireless Power Transmission, IEEE Open J. Antennas Propagat., vol. 2, pp. 170-180, Feb. 2021.
• Mohamed K. Emara, Takashi Tomura, Jiro Hirokawa, Shulabh Gupta. All-Dielectric Fabry-Pérot based Compound Huygens’ Structure for Millimeter-Wave Beam-Forming, IEEE Trans. Antennas Propag., vol. 69, no. 1, pp. 273-285, Jan. 2021.
• Takashi Tomura, Jiro Hirokawa. Anisotropic conductivity measurement by two kinds of multimode rectangular cavities, IEEE Microw. Theory Tech., vol. 69, no. 1, pp. 170-178, Jan. 2021.

著書

• 廣川二郎. 導波路工学, デザインエッグ社, Apr. 2021.

国際会議発表 (査読有り)

• Miao Zhang, Jiro Hirokawa. A 60-GHz-Band Beam-Tilted Corporate-Fed Waveguide Slot Array, IEEE AP-S URSI Intl. Symp., Dec. 2021.
• Jiro Hirokawa, Nelson J. G. Fonseca. Numerical Design of Planar Switching Matrices with an Arbitrary Number of Beams using Two-way Couplers, IEEE AP-S URSI Intl. Symp., Dec. 2021.
• Maharana Pratap Singh, Jiro Hirokawa, Saptarshi Ghosh. Substrate Integrated Waveguide-Fed Slot Antenna Array for Millimeter-Wave Applications, Indian Conf. Antennas Propag., Dec. 2021.
• Qi Li, Jiro Hirokawa, Takashi Tomura, Nelson J. G. Fonseca. Design of a Waveguide Two-plane Hybrid Coupler with Nonuniform Division, IEEE APS/URSI 2021, Dec. 2021.
• Baoquan Duan, Takashi Tomura, JIRO HIROKAWA. Transmission Progress in Rectangular-Coordinate Orthogonal Multiplexing by Excitation Optimization of Slot Arrays Based on the Scattering Parameters, 2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI), Dec. 2021.
• Takashi Tomura, Jiro Hirokawa. Gain evaluation of millimeter-wave-band plate-laminated-waveguide slot arrays by measured anisotropic conductivity, IEEE Int. Symp. Antennas Propag., Dec. 2021.
• Hirobumi Saito, Koji Tanaka, Mako Mita, Prilando Rizki Akbar, Budhaditya Pyne, Masato Tanaka, Naoto Onodera, Jiro Hirokawa, Toshihiro Obata, Kosei Ishimura, Hiromi Watanabe. Development and Orbit Demonstration of Small Synthetic Aperture Radar Satellite, Asia-Pacific Conf. Synthetic Aperture Radar, Nov. 2021.
• Muhsin Ali, Guillermo Carpintero, Takashi Tomura, Jiro Hirokawa, Simon Nellen, Björn Globisch. Millimetre-wave Photonic Emitter Featuring a PIN-PD with WR-12 Output, Intl. Topical Meeting Microw. Photonics, Nov. 2021.
• Takashi Tomura, Jiro Hirokawa, Muhsin Ali, Guillermo Carpintero. Spatial Multiplexed Wideband Wireless Link Using E-band Rectangular-Coordinate Orthogonal Multiplexing (ROM) Antennas, Int. Topical Meeting Microw. Photonics, Nov. 2021.
• Takashi Tomura, Soichi Sakurai, Jiro Hirokawa, Shulabh Gupta. Excitation Phase Control of Parallel-Fed Waveguide Slot Array Antenna Using Printed Circuit Board Single-Layer Structure Transmit Array, IEEE Int. Workshop Electromagnetics: Appl. Student Innovation Competition, Nov. 2021.
• Yuki Tomori, Tianyu Wang, Jiro Hirokawa, Takashi Tomura. Design of a Circularly Polarized Slot Array on a Parallel-plate Waveguide fed by Longitudinal Coupling Slots with Posts, Intl. Symp. Antennas Propag., Oct. 2021.
• Shota Yamakawa, Takashi Tomura, Jiro Hirokawa. Mode-matching Analysis and Genetic Algorithm Optimization for a Two-plane Coupler by Changing the Cross-sectional Shape of the Coupling Region, Intl. Symp. Antennas Propag., Oct. 2021.
• Mizuki Kurose, Takashi Tomura, JIRO HIROKAWA. Reception level in a touchless ticket gate including the element pattern in the millimeter wave band waveguide slot array installed on the sides, Intl. Symp. Antennas Propag., Oct. 2021.
• Jiro Hirokawa, Shihao Chen, Takashi Tomura. Bandwidth enhancement by optimizing the cross‐sectional shape of the coupling region in a waveguide 2‐plane hybrid, ICEAA, Oct. 2021.
• Jiro Hirokawa, Nelson J. G. Fonseca. Beam-Switching 2-D Butler Matrices Generating a Triangular Lattice of Beams, Intl. Symp. Antennas Propag., Oct. 2021.
• Yoshiki Hara, Takashi Tomura, Jiro Hirokawa. Effect on Unloaded Q Factor by a Feeding Structure of a 330-500 GHz Band Reflection-Type Hollow Rectangular Resonator, Intl. Symp. Antennas Propag., Oct. 2021.
• Yuta Ishikawa, Takashi Tomura, Jiro Hirokawa. Design of a Slot Array Antenna on Alternating-phase Feed Parallel-plate Waveguide, 2021 International Symposium on Antennas and Propagation, Oct. 2021.
• Xin Xu, Agnese Mazzinghi, Angelo Freni, Jiro Hirokawa. Demonstration of a 60GHz RLSA launching simultaneously three OAM modes, ICEAA, Aug. 2021.
• Kouhei Jitousho, Takashi Tomura, JIRO HIROKAWA. Rectangular-coordinate Orthogonal Multiplexing including Modulation, Intl. Symp. Antennas Propag., Jan. 2021.
• Wataru Kuramoto, Takashi Tomura, JIRO HIROKAWA. Wideband Design of a H-plane T-junction by Shape Optimization for a Corporate-feed Circuit of a Waveguide Slot Array in the 60GHz-band, ISAP 2020, Jan. 2021.
• Yuta Ishikawa, Takashi Tomura, Jiro Hirokawa. Excitation by Metal Posts of Square-arrangementSlot Antennas in Alternating-phase FeedParallel-plate Waveguide, 2020 International Symposium on Antennas and Propagation, Jan. 2021.
• Baoquan Duan, Takashi Tomura, Jiro Hirokawa, Miao Zhang. Transmission Enhancement in Rectangular-Coordinate Orthogonal Multiplexing by Excitation Optimization of Slot Arrays Based on the Scattering Parameters, Intl. Symp. Antennas Propag., Jan. 2021.
• Mizuki Kurose, Takashi Tomura, Jiro Hirokawa. Control of the reception level in a touchless entrance control gate using the millimeter-wave band waveguide slot array installed on the sides, Intl. Symp. Antennas Propag., Jan. 2021.
• Shota Yamakawa, Takashi Tomura, Jiro Hirokawa. Mode-matching Analysis and Genetic Algorithm Optimization for an E-plane Coupler by Changing the Cross-sectional Shape of the Coupling Region, Intl. Symp. Antennas Propag., Jan. 2021.
• Shihao Chen, Takashi Tomura, Jiro Hirokawa, Kota Ito, Mizuki Suga, Yushi Shirato, Daisei Uchida, Naoki Kita. Design to operate in Two Frequency Bands by Division of the Coupling Region in a Waveguide 2-plane Hybrid Coupler, Intl. Symp. Antennas Propag., Jan. 2021.
• Shuang Ji, Takashi Tomura, Jiro Hirokawa. Efficient Optimization for Bandwidth of the Element of a Multilayer Parallel-plate Slot Array, Intl. Symp. Antennas Propag., Jan. 2021.
• Tuchjuta Ruckkwaen, Takashi Tomura, Jiro Hirokawa. Transmission Enhancement for Radial Line Slot Antennas in Non-Far Region Using a Feeding Slot with Better Rotating Mode, Intl. Symp. Antennas Propag., Jan. 2021.
• Takashi Tomura, Jiro Hirokawa. Near-field Aperture Distribution Measurement of 8×2-element 60-GHz-Band Circularly Polarized Post-Wall Waveguide Dipole Loaded Slot Arrays, Intl. Symp. Antennas Propag., Jan. 2021.
• Tianyu Wang, Takashi Tomura, Jiro Hirokawa. Design of Longitudinal Coupling Slots with Matching Walls for a Rectangular Parallel Plate Slot Array Antenna, Intl. Symp. Antennas Propag., Jan. 2021.
• Hiroki Nishimoto, Takashi Tomura, Jiro Hirokawa. Design of a Multi-layer Circularly-polarized Element for a Corporate-feed Array Using Hexagonal and Circular Slot Layers, International Symposium on Antennas and Propagation, Jan. 2021.  公式リンク  
  
• Budhaditya Pyne, Hirobumi Saito, Prilando Rizki Akbar, Koji Tanaka, Jiro Hirokawa, Takashi Tomura. Flight Model 7-Panel Slot-Array Deployable Antenna Measurement Results of MicroX-SAR 100kg Class Demonstration Satellite, Euro. Microw. Conf., Jan. 2021.
• Soichi Sakurai, Takashi Tomura, Jiro Hirokawa. Suppression of Mutual Coupling between Microstrip Antenna Arrays by Antenna Decoupling Surfaces, 2020 International Symposium on Antennas and Propagation (ISAP2020), Jan. 2021.

国内会議発表 (査読有り)

• Yaxiang Wu, Tian Yu, Miao Zhang, Daquan Yu, Jiro Hirokawa, Qing Huo Liu. A W-Band Corporate-Fed Hollow-Waveguide Slot Array Antenna by Glass Micromachining, Intl. Symp. Antennas Propag., Jan. 2021.
• Nelson Fonseca, Sophie-Abigael Gomanne, Jiro Hirokawa. Connecting Networks for Two-Dimensional Butler Matrices with Improved Aggregate Gain, Intl. Symp. Antennas Propag., Jan. 2021.

国内会議発表 (査読なし・不明)

• 齋藤宏文, 石村康生, 戸村崇, 廣川二郎, 田中孝治. 小型SAR衛星用の形状安定性に優れた軽量CFRP製展開パネルスロットアレイアンテナの開発(その2), 宇宙科技連, Nov. 2021.
• 戸村崇, 廣川二郎, Muhsin Ali, Guillermo Carpintero. 直角座標系2次元直交多重による60GHz帯空間2多重光ファイバ無線, 電子情報通信学会技術研究報告, 一般社団法人 電子情報通信学会, vol. 121, no. 273, pp. 32-36, Nov. 2021.
• 友利優希, Tianyu Wang, 戸村崇, 廣川二郎. 非傾斜スロットを用いた円偏波放射平行平板アンテナの研究, 信学技報, Oct. 2021.
• 原慶城, 廣川二郎, 戸村崇. テラヘルツ帯部分並列給電導波管スロットアレーのアンテナ効率と帯域に関する研究, 信学技報, Oct. 2021.
• 桂悠斗, 戸村崇, 廣川二郎. 方形領域照射導波管スロットアレーアンテナの研究, 信学技報, Oct. 2021.
• 戸村崇, 廣川二郎, 山中大輔, 木寺信隆, 加賀谷修. 60GHz帯ポスト壁導波路2面結合器の設計, 信学エレ大, Sept. 2021.
• 廣川二郎, 戸村崇, 地頭所浩平, 西森健太郎, 竹厚善生, 赤堀耕一郎, 谷口徹. モノパルス並列給電導波管スロットアレーを用いた直角座標系直交非遠方界2多重QPSK伝送, 信学通信大, Sept. 2021.
• 石川裕太, 戸村崇, 広川二郎. 逆相給電平行平板導波路における円偏波クロススロット正方配列アレーアンテナの設計, 2021年 電子情報通信学会 ソサイエティ大会, Sept. 2021.
• 廣川二郎, Nelson J. G. Fonseca. 任意ビーム数1次元切替マトリックスの数値設計と2次元三角ビーム配列への適用, 信学通信大, Sept. 2021.
• 黒瀬瑞輝, 戸村崇, 廣川二郎. 側面に設置したミリ波帯導波管スロットアレーによる素子指向性を考慮したタッチレス改札内受信レベルの解析, 信学通信大, Sept. 2021.
• 赤嶺賢彦, 戸村 崇, 廣川 二郎. RCS計測のための近傍界遠方界変換における表面波散乱の影響, 信学ソ大, Sept. 2021.
• 柳澤利樹, 広川二郎, 戸村崇. 300GHz帯無指向性アンテナ給電用モード変換器に関する研究, 信学技報, vol. 121, no. 191, pp. 74-77, Sept. 2021.
• 齋藤宏文, 廣川二郎, 戸村崇, 石村康生, 田中孝治. 小型合成開口レーダ衛星用のCFRP製2次元スロットアレーアンテナ, 信学通信大, Sept. 2021.
• 山川奨太, 戸村崇, 廣川二郎. 導波管2面結合器における結合領域管軸方向の断面形状変化による広帯域化, 信学通信大, Sept. 2021.
• 齋藤宏文, 石村康生, 戸村崇, 廣川二郎. 小型 SAR 衛星用の形状安定性に優れたCFRP製展開パネルスロットアレイアンテナの開発, 信学技報, Apr. 2021.
• 櫻井壮一, 戸村崇, 廣川二郎, Shulabh Gupta. プリント基板⼀層構造トランスミットアレーによる並列給電導波管 スロットアレーアンテナの励振位相制御, 信学総大, Mar. 2021.
• 友利優希, Wang Tianyu, 廣川二郎, 戸村崇. 26GHz帯平行平板円偏波スロットアレーアンテナの設計, 信学総大, Mar. 2021.
• Jiro Hirokawa, Qi Li, Nelson J. G. Fonseca. Configurations of 2-D Beam-switching One-body Butler Matrices using 2-plane Couplers Generating a Triangular Lattice of Beams, 信学総大, Mar. 2021.
• Qi Li, Jiro Hirokawa, Takashi Tomura, Nelson J. G. Fonseca. Design of a 2-plane Coupler with Unequal Division, 信学総大, Mar. 2021.
• Baoquan Duan, Takashi Tomura, Jiro Hirokawa. Transmission Simulation in Rectangular-Coordinate Orthogonal Multiplexing by Excitation Optimization of Slot Arrays Based on the Scattering Parameters, 信学総大, Mar. 2021.
• Tianyu Wang, Takashi Tomura, Jiro Hirokawa. Design of a Waveguide Feeder with Centered Longitudinal Coupling Slots for a Parallel-Plate Slot Array Antenna Panel,, 信学総大, Mar. 2021.
• 黒瀬瑞輝, 戸村崇, 廣川二郎. 側面に設置したミリ波帯導波管スロットアレーによるタッチレス改札内受信レベルの解析, 信学総大, Mar. 2021.
• Tuchjuta Ruckkwaen, Takashi Tomura, Jiro Hirokawa. Transmission Stability on Distance in the Near-field Region in 5.8 GHz Band Radial Line Slot Antennas Using a Dogbone Cross-slot Feed, 信学総大, Mar. 2021.
• 石川裕太, 戸村崇, 広川二郎. 逆相給電平行平板導波路スロットアレーアンテナの設計, 2021年 電子情報通信学会 総合大会, Mar. 2021.
• 原慶城, 廣川二郎, 戸村崇. 330-500GHz帯反射型中空直方体共振器の給電構造による無負荷Q値への影響, 信学総大, Mar. 2021.

特許など

• 廣川二郎, 戸村崇, 伊藤　耕大, 菅　瑞紀, 新井　拓人, 白戸　裕史, 北　直樹. 無線通信方法. 特許. 公開. 国立大学法人東京工業大学, 日本電信電話株式会社. 2021/07/13. 特願2021-115790. 2023/01/25. 特開2023-012257. 2023.
• 廣川二郎, 新帯　亮　, 脇山　悟　, 城崎　俊文　. 半導体パッケージ. 特許. 公開. 国立大学法人東京工業大学, 株式会社デンソー. 2020/03/02. 特願2020-035214. 2021/09/16. 特開2021-141370. 2021.
• 戸村崇, 廣川二郎, 藤原　暉雄, 古川　実　. レクテナ装置. 特許. 登録. 国立大学法人東京工業大学, 株式会社翔エンジニアリング. 2019/09/25. 特願2019-174233. 2021/04/01. 特開2021-052515. 特許第7289437号. 2023/06/02 2023.

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