Papers - HIROSHI Hirayama
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Low-cost, High Accuracy, and Long Communication Range Energy-Harvesting Beat Sensor with LoRa and Ω-Antenna for Water-Level Monitoring Reviewed
Manh-Hiep DAO, Koichiro ISHIBASHI, The-Anh NGUYEN, Duy-Hieu BUI, Hiroshi HIRAYMA, Tuan-Anh TRAN
IEEE Sensors Journal 2025.01
Language：English Publishing type：Research paper (scientific journal)
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RF-DC Conversion Circuit using Quadrature Hybrid for Complex Maximum Power Point Tracking Reviewed
Kozaburo Tanahashi, Hiroshi Hirayama
2024.04
Authorship：Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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H-Shaped Slot Antenna with Harmonic Tuning Function and Integrated Power Amplifier, Reviewed International journal
Yuto Narita, Koichi Nozawa, Noriyuki Tanba, Shinji Hara, Hiroshi Hirayama,
Energies 16(5) ( 2128 ) 1 - 14 2023.02
Authorship：Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
DOI： 10.3390/en16052128
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大型核融合試験施設におけるメガワットミリ波ジャイロトロン発振器周辺の電磁環境調査 Reviewed
田中将裕, 吉村泰夫, 伊藤哲, 王建青, 平山裕, 宇田達彦, 藤原修
電子情報通信学会論文誌 B J105-B ( 8 ) 629 - 636 2022.08
Language：Japanese Publishing type：Research paper (scientific journal)
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Characteristic Mode Analysis of H-shaped Slot Patch Antenna with Class-F Load Function Reviewed
Proc. of IEEE WPW2022 739 - 742 2022.07
Authorship：Last author, Corresponding author Language：English Publishing type：Research paper (international conference proceedings)
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Monitoring leakage electromagnetic field around 77 GHz megawatt-class gyrotron oscillators at a large fusion test facility Reviewed
Masahiro Tanaka, Yasuo Yoshimura, Satoshi Ito, Kensuke Sasaki, Jianqing Wang, Hiroshi Hirayama, Tatsuhiko Uda, Osamu Fujiwara,
Proc. of BioEM 2022 2022.06
Language：English Publishing type：Research paper (international conference proceedings)
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Basic Characteristics of Proximity-Fed Microstrip Patch Antenna Having Class-F Load Impedance for Microwave Power Transfer Reviewed International journal
Shunya Ban, Hiroshi Hirayama
Proc. of AWPT2021 2021.12
Language：English Publishing type：Research paper (international conference proceedings)
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A Basic Consideration of RF-DC Conversion Circuit Using Quadrature Hybrid for Complex Maximum Power Point Tracking Reviewed International journal
Kouzaburo Tanahashi, Hiroshi Hirayama
Proc. of AWPT2021 2021.12
Language：English Publishing type：Research paper (international conference proceedings)
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Reduction in Human Interaction with Magnetic Resonant Coupling WPT Systems with Grounded Loop Reviewed International coauthorship International journal
Xianyi Duan,Junqing Lan,Yinliang Diao,Jose Gomez-Tames,Hiroshi Hirayama,Masashi Hotta,George Fischer and Akimasa Hirata
Energies 14 ( 21 ) 1 - 14 2021.11
Language：English Publishing type：Research paper (scientific journal)
DOI： 10.3390/en14217253
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Microstrip Patch Antenna with Class-F Load and DC Block Function for Microwave Power Transfer Reviewed
Takase Oshima, Shunya Ban, Hiroshi Hirayama
IEICE Electronics Express 18 ( 15 ) 1 - 5 2021.07
Language：English Publishing type：Research paper (scientific journal) Publisher：IEICE
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Proposal and Demonstration of Power Conversion-Chip/Amplifier Integrated Antenna Reviewed
Shinji Hara, Asako Suzuki, Hiroshi Hirayama
Proc. of EuMC 2020 2021.01
Language：English Publishing type：Research paper (international conference proceedings)
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Zero-Current Switching with LC Resonant Tank Circuit and Capacitor Isolation DC-DC Converter Reviewed International journal
Nakashima Osamu, Hirayama Hiroshi, Hiwatari Daichi, Jonokuchi Hideki
Proc. of EPE 2020 2020.09
Language：English Publishing type：Research paper (international conference proceedings)
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Folded Dipole Antenna with Class-F Load Function for Rectenna of Microwave Power Transfer Reviewed
Takase Oshima, Hiroshi Hirayama
IEICE Communications Express 9 ( 11 ) 524 - 528 2020.08
Language：English Publishing type：Research paper (scientific journal)
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Reduction of Human Interaction with Wireless Power Transfer System Using Shielded Loop Coil Reviewed International journal
Akihiko Kumazawa, Yinliang Diao, Akimasa Hirata, Hiroshi Hirayama
Electronics 9 ( 6 ) 1 - 13 2020.06
Language：English Publishing type：Research paper (scientific journal)
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Folded Spiral Resonator with Double-Layered Structure for Near-Field Wireless Power Transfer Reviewed International journal
Takaya Arai, Hiroshi Hirayama
Energies 13 ( 7 ) 1 - 13 2020.04
Language：English Publishing type：Research paper (scientific journal)
DOI： 10.3390/en13071581
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Near-field Wireless Power Transfer for Moving Vehicle Using Collinear Array Antenna Reviewed
Takase OSHIMA, Hiroshi HIRAYAMA
IEICE Communications Express 8 ( 12 ) 617 - 622 2019.12
Language：English Publishing type：Research paper (scientific journal)
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Double-layered Folded Spiral Resonator for Coupled-resonant Wireless Power Transfer Reviewed
Takaya ARAI, Kohei NIMURA, Hiroshi HIRAYAMA
IEICE Communications Express 8 ( 12 ) 490 - 494 2019.12
Language：English Publishing type：Research paper (scientific journal)
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Transmission efficiency improvement using Shielded Loop Antenna for Coupled-resonant Wireless Power Transfer Reviewed
Akihiko Kumazawa, Hiroshi Hirayama
IEICE Communications Express 8 ( 12 ) 485 - 489 2019.12
Language：English Publishing type：Research paper (scientific journal)
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Impedance Matching Mechanism of Shielded Loop Antenna for Wireless Power Transfer Reviewed
Akihiko Kumazawa, Hiroshi Hirayama
Proc. of AWPT2018 2018.11
Language：English Publishing type：Research paper (international conference proceedings)
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Basic Characteristics of a Double-layered Folded Spiral Resonator for Coupled-resonant Wireless Power Transfer Reviewed
Kohei Nimura, Hiroshi Hirayama
Proc. of AWPT2018 2018.11
Language：English Publishing type：Research paper (international conference proceedings)
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