Circularly Polarized Post-wall Waveguide Slotted Arrays. - Hisahiro Kai; Jiro Hirokawa; Makoto Ando (IEICE Electron. Express, 2004)

A Design of a Leaky Waveguide Crossed-Slot Linear Array with a Matching Element by the Method of Moments with Numerical-Eigenmode Basis Functions. - Takuichi Hirano; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2005)

Grating Lobes Suppression in Transverse Slot Linear Array with a Dual Parasitic Beam of Strip Dipoles. - M. G. Sorwar Hossain; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2005)

A Waveguide Broad-Wall Transverse Slot Linear Array with Reflection-Canceling Inductive Posts and Grating-Lobe Suppressing Parasitic Dipoles. - M. G. Sorwar Hossain; Jiro Hirokawa; Makoto Ando (IEICE Trans. Electron., 2005)

Feed through an Aperture to a Post-Wall Waveguide with Step Structure. - Takafumi Kai; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2005)

An Alternating-Phase Fed Single-Layer Slotted Waveguide Array in 76 GHz Band and Its Sidelobe Suppression. - Yuichi Kimura; Masanari Takahashi; Jiro Hirokawa; Makoto Ando; Misao Haneishi (IEICE Trans. Electron., 2005)

Reflection Characteristics of Center-Feed Single-Layer Waveguide Arrays. - Yasuhiro Tsunemitsu; Sehyun Park; Jiro Hirokawa; Makoto Ando; Yohei Miura; Yasuhiro Kazama; Naohisa Goto (IEICE Trans. Commun., 2005)

A Half-Sized Post-Wall Short-Slot Directional Coupler with Hollow Rectangular Holes in a Dielectric Substrate. - Shin-ichi Yamamoto; Jiro Hirokawa; Makoto Ando (IEICE Trans. Electron., 2005)

A Post-Wall Waveguide Slot Array with a Three-Way Power Divider on a Single-Layer Dielectric Substrate. - Shin-ichi Yamamoto; Nozomu Hikino; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2005)

A Three-Way Divider for Partially-Corporate Feed in an Alternating Phase-Fed Single-Layer Slotted Waveguide Array. - Miao Zhang; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2005)

Feasibility of mechanical beam scan by movable dielectric blocks in the feeder of a single-layer waveguide array antenna. - Toshinori Kondo; Jiro Hirokawa; Kimio Sakurai; Makoto Ando (IEICE Electron. Express, 2006)

Coupling of a circularly polarized slot pair on a corrugated waveguide of finite length. - Kei Sato; Jiro Hirokawa; Kaoru Sudo; Makoto Ando (IEICE Electron. Express, 2006)

Design of 1 m2 Order Plasma Excitation Single-Layer Slotted Waveguide Array with Conducting Baffles and Quartz Glass Strips Using the GSM-MoM Analysis. - Takuichi Hirano; Kimio Sakurai; Jiro Hirokawa; Makoto Ando; Tetsuya Ide; Atsushi Sasaki; Kazufumi Azuma; Yukihiko Nakata (IEICE Trans. Commun., 2006)

A Coaxial Line to Post-Wall Waveguide Transition for a Cost-Effective Transformer between a RF-Device and a Planar Slot-Array Antenna in 60-GHz Band. - Takafumi Kai; Yusuke Katou; Jiro Hirokawa; Makoto Ando; Hiroshi Nakano; Yasutake Hirachi (IEICE Trans. Commun., 2006)

A Single-Layer Hollow-Waveguide 8-Way Butler Matrix. - Shin-ichi Yamamoto; Jiro Hirokawa; Makoto Ando (IEICE Trans. Electron., 2006)

Moment Method Analysis of a Plane Wave Generator in an Oversized Rectangular Waveguide. - Takafumi Kai; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2007)

A Cost-Effective Transition between a Microstrip Line and a Post-Wall Waveguide Using a Laminated LTCC Substrate in 60-GHz Band. - Takafumi Kai; Jiro Hirokawa; Makoto Ando; Hiroshi Nakano; Yasutake Hirachi (IEICE Trans. Electron., 2007)

Step Width Tolerable for Offset of the Aperture in a Millimeter-Wave Transducer between Post-Wall and Hollow Standard Waveguides. - JungAun Lee; Jiro Hirokawa; Makoto Ando (IEICE Trans. Electron., 2008)

The Ridged Cross-Junction Multiple-Way Power Divider for Small Blockage and Symmetrical Slot Arrangement in the Center Feed Single-Layer Slotted Waveguide Array. - Yasuhiro Tsunemitsu; Goro Yoshida; Naohisa Goto; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2008)

A Lightweight Radial Line Slot Antenna with Honeycomb Structure for Space Use. - Hideki Ueda; Jiro Hirokawa; Makoto Ando; Osamu Amano; Yukio Kamata (IEICE Trans. Commun., 2008)

Fabrication of Alternating-Phase Fed Single-Layer Slotted Waveguide Arrays Using Plastic Materials with Metal-Plating. - Miao Zhang; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2008)

Bandwidth Enhancement of Aperture Feed by an Air Rectangular Cavity Backing in a LTCC Post-Wall Waveguide. - JungAun Lee; Jiro Hirokawa; Makoto Ando (IEICE Trans. Electron., 2009)

Analysis and Uniform Design of a Single-Layer Slotted Waveguide Array Antenna with Baffles. - Takehito Suzuki; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2009)

Analysis and Design of a Reflection-Cancelling Transverse Slot-Pair Array with Grating-Lobe Suppressing Baffles. - Takehito Suzuki; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2009)

Evaluation of Effective Conductivity of Copper-Clad Dielectric Laminate Substrates in Millimeter-Wave Bands Using Whispering Gallery Mode Resonators. - Thi Huong Tran; Yuanfeng She; Jiro Hirokawa; Kimio Sakurai; Yoshinori Kogami; Makoto Ando (IEICE Trans. Electron., 2009)

Design of Post-Wall Feed Waveguide for a Parallel Plate Slot Array by an Analysis Model with Corrected Solid-Walls. - Koh Hashimoto; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2010)

A Post-Wall Center-Feed Waveguide Circuit Consisting of T-Junctions for Reducing the Slot-Free Area in a Parallel Plate Slot Array Antenna. - Koh Hashimoto; Jiro Hirokawa; Makoto Ando (IEICE Trans. Electron., 2010)

Connected Post-Wall (C-PW) Waveguide for Efficient Design of Broad Wall Slots by Using Equivalent Solid-Wall Waveguide. - Jae-Ho Lee; Kimio Sakurai; Jiro Hirokawa; Makoto Ando (IEICE Trans. Electron., 2010)

Design of Narrow Wall Windows in a Waveguide to Feed Partially-Dielectric-Filled Oversized-Rectangular Waveguide Based on 2-Dimensional Analyses of Two Orthogonal Directions. - Miroslav Samardzija; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2010)

A Coaxial Feeder with Two Pairs of Parasitic Pins for Realizing Rotationally Symmetric Aperture Illumination in Spiral Array Radial Line Slot Antennas. - Hideki Ueda; Jiro Hirokawa; Makoto Ando; Matteo Albani (IEICE Trans. Commun., 2010)

Design of a Partially-Corporate Feed Double-Layer Slotted Waveguide Array Antenna in 39 GHz Band and Fabrication by Diffusion Bonding of Laminated Thin Metal Plates. - Miao Zhang; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2010)

A Center-Feed Linear Array of Reflection-Canceling Slot Pairs on Post-Wall Waveguide. - Jae-Ho Lee; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2011)

Practical Slot Array Design by Method of Moments Using One Basis Function and Constant Correction Length. - Jae-Ho Lee; Takuichi Hirano; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2011)

A High-Efficiency Circularly-Polarized Aperture Array Antenna with a Corporate-Feed Circuit in the 60 GHz Band. - Yohei Miura; Jiro Hirokawa; Makoto Ando; Kazufumi Igarashi; Goro Yoshida (IEICE Trans. Electron., 2011)

Eigenmode Analysis of Propagation Constant for a Microstrip Line with Dummy Fills on a Si CMOS Substrate. - Yuya Ono; Takuichi Hirano; Kenichi Okada 001; Jiro Hirokawa; Makoto Ando (IEICE Trans. Electron., 2011)

Loss of Post-Wall Waveguides and Efficiency Estimation of Parallel-Plate Slot Arrays Fed by the Post-Wall Waveguide in the Millimeter-Wave Band. - Yuanfeng She; Thi Huong Tran; Koh Hashimoto; Jiro Hirokawa; Makoto Ando (IEICE Trans. Electron., 2011)

Full-Wave Design Considering Slot Admittance in 2-D Waveguide Slot Arrays with Perfect Input Matching. - Miao Zhang; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2011)

LTCC Partially-Filled Post-Wall Rectangular-Waveguide Slot Array Antenna in the Millimeter-Wave Band. - Yuanfeng She; Jiro Hirokawa; Makoto Ando; Daisuke Hanatani; Masahiro Fujimoto (IEICE Trans. Electron., 2012)

Manufacture and Performance of a 60GHz-Band High-Efficiency Antenna with a Thick Resin Layer and the Feed through a Hole in a Silicon Chip. - Jun Asano; Jiro Hirokawa; Hiroshi Nakano; Yasutake Hirachi; Hiroshi Isono; Atsushi Ishii; Makoto Ando (IEICE Trans. Commun., 2013)

Design and Measurement of the Plate Laminated Waveguide Slot Array Antenna and Its Feasibility for Wireless Link System in the 120 GHz Band. - Dongjin Kim; Jiro Hirokawa; Kimio Sakurai; Makoto Ando; Takuma Takada; Tadao Nagatsuma; Jun Takeuchi; Akihiko Hirata (IEICE Trans. Commun., 2013)

An Equivalent Double Layer Model for a Fast Design and Analysis of High Gain-Multilayer Radial Line Slot Antennas. - Tung Nguyen; Rushanthi Jayawardene; Yasutomo Takano; Kimio Sakurai; Jiro Hirokawa; Makoto Ando; Osamu Amano; Shuichi Koreeda; Takaomi Matsuzaki; Yukio Kamata (IEICE Trans. Commun., 2013)

Photonic architecture for beam forming of RF phased array antenna. - Shigeyuki Akiba; Masayuki Oishi; Yoshihiro Nishikawa; Kyo Minoguchi; Jiro Hirokawa; Makoto Ando (OFC, 2014)

Millimeter-Wave Propagation Characteristics and Localized Rain Effects in a Small-Scale University Campus Network in Tokyo. - Hung V. Le; Hasan Md. Mohibul; Takuichi Hirano; Toru Taniguchi; Akira Yamaguchi; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2014)

Propagation Characteristics of Honeycomb Structures Used in mm-Wave Radial Line Slot Antennas. - Tung Nguyen; Rushanthi Jayawardene; Kimio Sakurai; Jiro Hirokawa; Makoto Ando; Manuel Sierra-Castañer; Osamu Amano; Shuichi Koreeda; Takaomi Matsuzaki; Yukio Kamata (IEICE Trans. Commun., 2014)

Phased Array Antenna Beam Steering Scheme for Future Wireless Access Systems Using Radio-over-Fiber Technique. - Masayuki Oishi; Yoshihiro Nishikawa; Kosuke Nishimura; Keiji Tanaka; Shigeyuki Akiba; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2014)

A Wideband 16×16-Element Corporate-Feed Hollow-Waveguide Slot Array Antenna in the 60-GHz Band. - Takashi Tomura; Jiro Hirokawa; Takuichi Hirano; Makoto Ando (IEICE Trans. Commun., 2014)

A Simple Through-Hole Based Transformer between Microstrip Line and Post-Wall Waveguide for Millimeter-Wave Applications. - Yusuke Uemichi; Ryouhei Hosono; Ning Guan; Jiro Hirokawa; Makoto Ando (IEICE Trans. Electron., 2014)

Double-Layer Plate-Laminated Waveguide Slot Array Antennas for a 39GHz Band Fixed Wireless Access System. - Miao Zhang; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2014)

A Partially-Corporate Feed Double-Layer Waveguide Slot Array with the Sub-Arrays also Fed in Alternating-Phases. - Miao Zhang; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2014)

Foreword. - Jiro Hirokawa (IEICE Trans. Commun., 2015)

Rain Sensing Using Dual-Frequency Measurements from Small-Scale Millimeter-Wave Network. - Hung V. Le; Carlo Capsoni; Roberto Nebuloni; Lorenzo Luini; Takuichi Hirano; Toru Taniguchi; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2015)

Design of mm-Wave RLSAs with Lossy Waveguides by Slot Coupling Control Techniques. - Tung Nguyen; Jiro Hirokawa; Makoto Ando; Manuel Sierra-Castañer (IEICE Trans. Commun., 2015)

A 12×16-Element Double-Layer Corporate-Feed Waveguide Slot Array Antenna. - Satoshi Ito; Miao Zhang; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2016)

A 60GHz-Band High-Efficiency Antenna with a Thick Resin Layer and Differentially Fed through a Hole in a Silicon Chip. - Naoya Oikawa; Jiro Hirokawa; Hiroshi Nakano; Yasutake Hirachi; Hiroshi Isono; Atsushi Ishii; Makoto Ando (IEICE Trans. Commun., 2016)

Practical considerations of terahertz communications for short distance applications. - Tadao Nagatsuma; Kazuki Oogimoto; Yuki Inubushi; Jiro Hirokawa (Nano Commun. Networks, 2016)

Performance analysis and hardware verification of signal detection scheme using cyclic prefix in OFDM. - Akihide Nagamine; Kanshiro Kashiki; Fumio Watanabe; Jiro Hirokawa (WPMC, 2017)

60GHz-Band Photonic-Integrated Array-Antenna and Module for Radio-over-Fiber-Based Beam Forming. - Kotoko Furuya; Takayoshi Hirasawa; Masayuki Oishi; Shigeyuki Akiba; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2017)

Alignment Control System Using Beam-Tilting 1-D Waveguide-Slot Array Antennas for 120-GHz-Band Corporate-Feed High-Gain 2-D Arrays. - Akihiko Hirata; Jun Takeuchi; Keisuke Hashimoto; Jiro Hirokawa (IEICE Trans. Commun., 2017)

Recent Technologies in Japan on Array Antennas for Wireless Systems. - Jiro Hirokawa; Qiang Chen; Mitoshi Fujimoto; Ryo Yamaguchi (IEICE Trans. Commun., 2017)

One-Body 2-D Beam-Switching Butler Matrix with Waveguide Short-Slot 2-Plane Couplers. - Dong-Hun Kim; Jiro Hirokawa; Makoto Ando (IEICE Trans. Electron., 2017)

A TM010 Cavity Power-Combiner with Microstrip Line Inputs. - Vinay Ravindra; Hirobumi Saito; Jiro Hirokawa; Miao Zhang; Atsushi Tomiki (IEICE Trans. Electron., 2017)

Compact X-Band Synthetic Aperture Radar for 100kg Class Satellite. - Hirobumi Saito; Prilando Rizki Akbar; Hiromi Watanabe; Vinay Ravindra; Jiro Hirokawa; Kenji Ura; Pyne Budhaditya (IEICE Trans. Commun., 2017)

Plate-Laminated Waveguide Monopulse Slot Array Antenna with Full-Corporate-Feed in the E-Band. - Xin Xu; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2017)

Millimeter-Wave Frequency Beam Scanning Array With a Phase Shifter Based on Substrate-Integrated-Waveguide. - Xiaohe Cheng; Yuan Yao 003; Takashi Tomura; Jiro Hirokawa; Tao Yu; Junsheng Yu; Xiaodong Chen (IEEE Access, 2018)

A Compact Multi-Beam End-Fire Circularly Polarized Septum Antenna Array for Millimeter-Wave Applications. - Xiaohe Cheng; Yuan Yao 003; Takashi Tomura; Jiro Hirokawa; Tao Yu; Junsheng Yu; Xiaodong Chen (IEEE Access, 2018)

Future 5G Millimeter-Wave Systems and Terminals: Propagation Channel, Communication Techniques, Devices, and Measurements. - Pablo Padilla; Jiro Hirokawa; Lars J. Foged; Juha Ala-Laurinahoo; Damir Senic; Astrid Algaba-Brazález; Ahmed Hussain; Juan F. Valenzuela-Valdés (IEEE Commun. Mag., 2018)

Absorber Integrated Planar Slot Array Antenna for Suppression of Multiple Reflection in 120-GHz-Band Close-Proximity Wireless System. - Akihiko Hirata; Jiro Hirokawa (IEICE Trans. Electron., 2018)

Wideband Waveguide Short-Slot 2-Plane Coupler Using Frequency Shift of Propagating Modes. - Dong-Hun Kim; Jiro Hirokawa; Makoto Ando (IEICE Trans. Electron., 2018)

Performance Analysis and Hardware Verification of Feature Detection Using Cyclostationarity in OFDM Signal. - Akihide Nagamine; Kanshiro Kashiki; Fumio Watanabe; Jiro Hirokawa (IEICE Trans. Commun., 2018)

Millimeter Wave Antenna for Information Shower: Design Choices and Performance. - Sergio Barberis; Daniele Disco; Roberto Vallauri; Takashi Tomura; Jiro Hirokawa (EuCNC, 2019)

Development of Compact SAR Systems for Small Satellite. - Hirobumi Saito; Koichi Ijichi; Jiro Hirokawa; Takashi Tomura; Prilando Rizki Akbar; Pyne Budhaditya; Koji Tanaka; Makoto Mita; Tomoki Kaneko; Hiromi Watanabe (IGARSS, 2019)

A 20-GHz-Band 64 × 64 Hollow Waveguide Two-Dimensional Butler Matrix. - Takashi Tomura; Dong-Hun Kim; Masahiro Wakasa; Yuki Sunaguchi; Jiro Hirokawa; Kentaro Nishimori (IEEE Access, 2019)

Fabrication and Evaluation of Integrated Photonic Array-Antenna System for RoF Based Remote Antenna Beam Forming. - Takayoshi Hirasawa; Shigeyuki Akiba; Jiro Hirokawa; Makoto Ando (IEICE Trans. Electron., 2019)

Perpendicular-Corporate Feed in a Four-Layer Circularly-Polarized Parallel-Plate Slot Array. - Hisanori Irie; Takashi Tomura; Jiro Hirokawa (IEICE Trans. Commun., 2019)

Foreword. - Monai Krairiksh; Jiro Hirokawa (IEICE Trans. Commun., 2019)

12- and 21-GHz Dual-Band Dual-Circularly Polarized Offset Parabolic Reflector Antenna Fed by Microstrip Antenna Arrays for Satellite Broadcasting Reception. - Masafumi Nagasaka; Masaaki Kojima; Hisashi Sujikai; Jiro Hirokawa (IEICE Trans. Commun., 2019)

A PCB-Integratable Metal Cap Slot Antenna for 60-GHz Band Mobile Terminals. - Takashi Tomura; Haruhisa Hirayama; Jiro Hirokawa (IEICE Trans. Commun., 2019)

Wideband Design of a Short-Slot 2-Plane Coupler by the Mode Matching/FEM Hybrid Analysis Considering the Structural Symmetry. - Masahiro Wakasa; Dong-Hun Kim; Takashi Tomura; Jiro Hirokawa (IEICE Trans. Commun., 2019)

Laser-Drilled All-Dielectric Huygens' Transmit-Arrays as 120 GHz Band Beamformers. - Mohamed K. Emara; Sonya K. Stuhec-Leonard; Takashi Tomura; Jiro Hirokawa; Shulabh Gupta (IEEE Access, 2020)

Novel Unmanned Aerial Vehicle-Based Line-of-Sight MIMO Configuration Independent of Transmitted Distance Using Millimeter Wave. - Naoki Matsumura; Kentaro Nishimori; Ryotaro Taniguchi; Takefumi Hiraguri; Takashi Tomura; Jiro Hirokawa (IEEE Access, 2020)

8 × 2-Element 60-GHz-Band Circularly Polarized Post-Wall Waveguide Slot Array Antenna Loaded With Dipoles. - Takashi Tomura; Yuta Saito; Jiro Hirokawa (IEEE Access, 2020)

A Four-Corner-Fed Slotted Waveguide Sparse Array for Near-Field Focusing. - Yaxiang Wu; Bolin Jiang; Miao Zhang; Jiro Hirokawa; Qing Huo Liu (IEEE Access, 2020)

Transmission Enhancement in Rectangular-Coordinate Orthogonal Multiplexing by Excitation Optimization of Slot Arrays for a Given Distance in the Non-Far Region Communication. - Ryotaro Ohashi; Takashi Tomura; Jiro Hirokawa (IEICE Trans. Commun., 2020)

Sidelobe Suppression in Both the E and H Planes Using Slit Layers over a Corporate-Feed Waveguide Slot Array Antenna Consisting of 2×2-Element Radiating Units. - Haruka Arakawa; Takashi Tomura; Jiro Hirokawa (IEICE Trans. Commun., 2020)

Experimental Evaluation of Intersymbol Interference in Non-Far Region Transmission using a Large Array Antenna in the Millimeter-Wave Band. - Tuchjuta Ruckkwaen; Takashi Tomura; Kiyomichi Araki; Jiro Hirokawa; Makoto Ando (IEICE Trans. Commun., 2020)

Development and Performance Evaluation of Small SAR System for 100-kg Class Satellite. - Pyne Budhaditya; Hirobumi Saito; Prilando Riziki Akbar; Jiro Hirokawa; Takashi Tomura; Koji Tanaka (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2020)

Realization of a Wideband Series-Fed 4 × 4-Element Waveguide Slot Array in the X-Band. - Jiyu He; Yaxiang Wu; Dan Chen; Miao Zhang; Jiro Hirokawa; Qing Huo Liu (IEEE Access, 2021)

Analysis of Intersymbol Interference Characterized by the Large Array Antennas Adopted in a 60-GHz-Band Gigabit Compact-Range Wireless Access System. - Miao Zhang; Masahiro Wakasa; Koji Toyosaki; Kiyomichi Araki; Jiro Hirokawa; Makoto Ando (IEEE Access, 2021)

Design of the Traveling-Wave Series-Fed Microstrip Antenna Array with Power Control Slits of Unequal Inter-Element Spacing. - Jun Goto; Makoto Matsuki; Takashi Maruyama; Toru Fukasawa; Naofumi Yoneda; Jiro Hirokawa (IEICE Trans. Commun., 2021)

Transmission Characteristics Control of 120 GHz-Band Bandstop Filter by Coupling Alignment-Free Lattice Pattern. - Akihiko Hirata; Koichiro Itakura; Taiki Higashimoto; Yuta Uemura; Tadao Nagatsuma; Takashi Tomura; Jiro Hirokawa; Norihiko Sekine; Issei Watanabe; Akifumi Kasamatsu (IEICE Trans. Electron., 2021)

Control of 120-GHz-Band Split Ring Resonator Filter by Coupling Lattice Pattern Substrate. - Koichiro Itakura; Akihiko Hirata; Masato Sonoda; Taiki Higashimoto; Tadao Nagatsuma; Takashi Tomura; Jiro Hirokawa; Norihiko Sekine; Issei Watanabe; Akifumi Kasamatsu (IEICE Trans. Electron., 2021)

A Wideband and High-Gain All-Metallic Perpendicular-Corporate-Fed Multi-Layered Parallel-Plate Slot Array Antenna. - Shuang Ji; Jiro Hirokawa; Takashi Tomura (IEEE Access, 2022)

Design of the Circularly Polarized Ring Microstrip Antenna with Shorting Pins. - Jun Goto; Akimichi Hirota; Kyosuke Mochizuki; Satoshi Yamaguchi; Kazunari Kihira; Toru Takahashi 005; Hideo Sumiyoshi; Masataka Otsuka; Naofumi Yoneda; Jiro Hirokawa (IEICE Trans. Commun., 2022)

Control of Radiation Direction in an Aperture Array Excited by a Waveguide 2-Plane Hybrid Coupler. - Yuki Sunaguchi; Takashi Tomura; Jiro Hirokawa (IEICE Trans. Commun., 2022)

Multibeam Patterns Suitable for Massive MIMO Configurations. - Kentaro Nishimori; Jiro Hirokawa (IEICE Trans. Commun., 2022)

Design for Operation in Two Frequency Bands by Division of the Coupled Region in a Waveguide 2-Plane Coupler. - Shihao Chen; Takashi Tomura; Jiro Hirokawa; Kota Ito; Mizuki Suga; Yushi Shirato; Daisei Uchida; Naoki Kita (IEICE Trans. Electron., 2022)

Directional beam antenna control in response to drone tilts. - Chikayo Hata; Takefumi Hiraguri; Takahiro Matsuda 001; Tetsuro Imai; Jiro Hirokawa (ICCE-Taiwan, 2023)

A Broadband Full-Corporate-Fed Slot Array Antenna Based on the Single-Layer Substrate Integrated Waveguide. - Baoquan Duan; Shijiu Zheng; Miao Zhang; Jiro Hirokawa; Qing Huo Liu (IEEE Access, 2023)

A Two-Dimensional 6×4-Way Hollow Waveguide Beam-Switching Matrix. - Qi Li; Jiro Hirokawa; Takashi Tomura; Yuta Takahashi; Naoki Kita; Nelson J. G. Fonseca (IEEE Access, 2023)

A Double Layer Cross-Slot Aperture-Fed Millimeter-Wave Antenna Array With Wide Axial Ratio Bandwidth. - Maharana Pratap Singh; Jiro Hirokawa; Saptarshi Ghosh 004 (IEEE Access, 2023)

A Center-Fed Dual-Polarized Parallel-Plate Waveguide Slot Array Antenna Based on a Feeding Waveguide With Centered Longitudinal Feeding Slots. - Huanqian Xiong; Jiro Hirokawa; Takashi Tomura (IEEE Access, 2023)

Wavelet OFDM Wireless Communication System for Autonomous Underwater Vehicles Using Loop-Shaped Antennas in Underwater Environments. - Ryosuke Hasaba; Kazuhiro Eguchi; Toshiyuki Wakisaka; Jiro Hirokawa; Miyuki Hirose; Tohlu Matsushima; Yuki Fukumoto; Yuya Nishida; Kazuo Ishii (IEEE Access, 2024)

Effective Design of an Array of Coupling Slots With a Reflection-Canceling Wall for a Parallel-Plate Slot Array Antenna. - Tianyu Wang; Takashi Tomura; Jiro Hirokawa (IEEE Access, 2024)