IEICE Technical Report

Online edition: ISSN 2432-6380

Wireless Power Transfer

Workshop Date : 2025-10-02 - 2025-10-03 / Issue Date : 2025-09-25

WPT2025-21
Derivation of k,Q-notation Fixed-form Vo Theoretical Formula and Linking Important Indicators of Wireless Power Transfer (Part 1) -- Load Voltage Characteristics Interpreted from Fixed-form Formula Structure for X-S type Magnetic Coupled Configurations and Relationship with Efficiency/Power --
Hideaki Abe (F3rd mc wptLab)
pp. 1 - 6

WPT2025-22
Wireless Charging Roadway System using Magnetic Resonance method with Linear Placement of ultra-small coil elements
Koichi Tsunekawa, Yoshinori Hiramatu, kirito Furusawa (Chubu Univ.)
pp. 7 - 10

WPT2025-23
[Invited Lecture] Microwave-DC Interconversion Using Microwave Oscillators with Transistors
Minoru Sanagi, Ibuki Inoue (Okayama Univ.)
pp. 11 - 16

WPT2025-24
[Invited Lecture] Development of Large-Area 6.78 MHz Resonant Inductive Coupling Wireless Power Transfer System Robust to Cross-Interference and Resonant Frequency Deviation
Masataka Ishihara, Kairi Kato (Okayama Univ.), Kazuhiro Umetani (Kyushu Univ.), Eiji Hiraki (Okayama Univ.)
p. 17

WPT2025-25
K-Band WPT link with a DC output power of 2.9 watts and a high transfer efficiency of 20.7% from the transmitter’s RF output power
Ryosuke Sato, Naoki Sakai, Masaomi Tsuru, Keisuke Noguchi (KIT), Yuki Suto, Shailendra Kaushal, Ning Guan (Fujikura), Kenji Itoh (KIT)
pp. 18 - 21

WPT2025-26
[Invited Lecture] Multiple-Coil Applications and Underwater/Snow Transmission in Magnetic Coupling WPT -- Our Research Findings and Open Issues --
Tamami Maruyama (Hiroshima Institute of Technology), Akari Kamada, Masashi Nakatsugawa (National Institute of Technology, Hakodate College), Masaya Tamura (Toyohashi University of Technology), Noriharu Suematsu (Tohoku University), Ikuo Awai (Fuji Wave)
pp. 22 - 24

WPT2025-27
[Invited Lecture] Way to Cope for Declined Power Transmission Efficiency in Resonator-Coupled Type Wireless Power Transfer System Mainly Using Magnetic Field Coupling
Masashi Hotta, Takaya Adachi, Kazuki Chikaraishi, Yuka Shimazu (Yamaguchi Univ.)
pp. 25 - 30

Note: Each article is a technical report without peer review, and its polished version will be published elsewhere.

The Institute of Electronics, Information and Communication Engineers (IEICE), Japan