Committee |
Date Time |
Place |
Paper Title / Authors |
Abstract |
Paper # |
NS |
2024-05-09 15:20 |
Mie |
Sinfonia Technology Hibiki Hall Ise (Primary: On-site, Secondary: Online) |
Study of Test Case Reduction in Shadow Tests Focusing on Requests/Responses Kyohei Yamada, Tomoki Nakashima, Takehiro Kitano, Akinori Shiraga (NTT) |
(To be available after the conference date) [more] |
|
US |
2023-05-18 14:35 |
Tokyo |
Surugadai Campus, Nihon University |
Structural optimization of the first parabolic reflector of DPLUS Shoki Ieiri, KyoHei Yamada, Chen Kang, Takeshi Morita (The Univ. of Tokyo) US2023-6 |
A high-frequency ultrasonic transducer with focusing mechanism using two parabolic surfaces (DPLUS) is structurally opti... [more] |
US2023-6 pp.28-32 |
US |
2022-05-19 14:30 |
Tokyo |
Kikai-Shinko-Kaikan Bldg. |
Focusing mechanism of Tube-Type Double-Parabolic-Reflectors Ultrasonic Transducer Kyohei Yamada, Chen Kang (The Univ. of Tokyo), Takasuke Irie (Microsonic), Takashi Iijima (AIST), Susumu Miyake, Takeshi Morita (The Univ. of Tokyo) US2022-8 |
(To be available after the conference date) [more] |
US2022-8 pp.32-37 |
US |
2021-06-18 13:25 |
Online |
Online |
Fundamental Study of Tube-Type Double-Parabolic-Reflectors Ultrasonic Transducer Kyohei Yamada, Kang Chen (The Univ. of Tokyo), Takasuke Irie (Microsonic), Takashi Iijima (Tokyo Univ. of Science), Susumu Miyake, Takeshi Morita (The Univ. of Tokyo) US2021-9 |
(To be available after the conference date) [more] |
US2021-9 pp.6-11 |
EE |
2018-01-30 09:30 |
Oita |
Satellite Campus Oita |
Half-Bridge DC-DC Converter Formulation Under Asymmetrical Control Daiki Yaginuma, Kyohei Yamada, Hikaru Kitaoka, Takashi Ohira (Toyohashi Univ. of Tech.) EE2017-65 |
In this paper, an asymmetrical control scheme is considered to regulate the output voltage of a half-bridge DC-DC conver... [more] |
EE2017-65 pp.133-138 |
MW |
2017-12-20 13:20 |
Tokyo |
|
Maximization of power transmission efficiency of coupler considering element loss in impedance matching circuit Ryoichi Baba, Kyohei Yamada, Naoki Sakai, Takashi Ohira (TUT) MW2017-159 |
In wireless power transmission systems, transmission efficiency is one of important parameters. Therefore, improvement o... [more] |
MW2017-159 pp.101-105 |
MW |
2017-12-20 14:10 |
Tokyo |
|
Design Theory of LC-Ladder Matching with Minimum Stored Energy Kyohei Yamada, Takashi Ohira (TUT) MW2017-161 |
A design theory of an LC ladder which transforms a positive real impedance to another with minimum stored energy is prop... [more] |
MW2017-161 pp.113-116 |
MW |
2017-11-10 10:40 |
Okinawa |
Miyakojima Marin Terminal Bldg. |
Topology maps for power dissipation minimization in LC matching circuits Naoki Sakai, Kyohei Yamada, Takashi Ohira (Toyohashi Univ. of Tech.) MW2017-131 |
Power dissipation in LC matching circuits is one problem for wireless high-power transfer system.
This paper presents ... [more] |
MW2017-131 pp.105-110 |
EE, WPT, IEE-SPC [detail] |
2017-07-27 09:30 |
Tokyo |
Kikai-Shinko-Kaikan Bldg. |
[Invited Lecture]
6.78-MHz Current Doubler Rectifier with High-Q Inductor Kyohei Yamada (TUT) EE2017-10 WPT2017-15 |
This technical report talks about prototyping of a 6.78-MHz current doubler rectifier in which an inductor with high unl... [more] |
EE2017-10 WPT2017-15 pp.1-4 |
EE, WPT, IEE-SPC [detail] |
2017-07-28 10:55 |
Tokyo |
Kikai-Shinko-Kaikan Bldg. |
[Invited Lecture]
2.4-GHz High-Impedance Rectifier Kyohei Yamada (TUT) EE2017-25 WPT2017-30 |
I report design and fabrication process of a 2.4-GHz high-impedance rectifier which competed in Radio Frequency Rectifie... [more] |
EE2017-25 WPT2017-30 pp.89-92 |
HPB (2nd) |
2017-02-22 11:25 |
Tokyo |
|
Activity Estimation for People Working in Office using Power and Vibration Sensors Kyohei Yamada, Ryota Tsubakitani (NITT), Ryushi Kimura (NITK), Hideyuki Kobayashi (NITS), Shinichiro Mito (NITT) |
In this study, we attempted to estimate people's position and behavior using wireless power sensors and vibration sensor... [more] |
|
MW |
2016-12-16 14:30 |
Kanagawa |
National Defense Academy |
How to Find N of N-way Resistance Compression Network That Makes Input-Resistance Variation within Specified Value Kyohei Yamada, Shinji Abe, Takashi Ohira (Toyohashi Univ. Tech.) MW2016-165 |
[more] |
MW2016-165 pp.189-194 |
MW |
2016-12-16 16:00 |
Kanagawa |
National Defense Academy |
Two Topologies of Quarter-Wave-Line Inserted Resistance Compression Rectifier
-- Shunt-Shunt Topology and Series-Series Topology -- Shinji Abe, Kyohei Yamada, Naoki Sakai, Takashi Ohira (TUT) MW2016-169 |
In order to supply power active DC load such as motor and battery with wireless power transfer, we proposed quarter-wave... [more] |
MW2016-169 pp.211-214 |
EE, WPT (Joint) |
2016-10-07 09:50 |
Kyoto |
|
Analysis of a Voltage-Doubler-Based Resistance Compression Rectifier
-- Proposal of a novel analysis method by square-wave approximation -- Kyohei Yamada, Yoichiro Miyazaki, Shinji Abe, Naoki Sakai, Takashi Ohira (Toyohashi Univ. Tech.) WPT2016-32 |
[more] |
WPT2016-32 pp.73-78 |
MW |
2016-06-23 13:00 |
Gifu |
Gifu Univ. |
Vector Fields Depicted by Linear Two-Port Circuits on the Smith Chart Kyohei Yamada, Shinji Abe, Naoki Sakai, Takashi Ohira (Toyohashi Univ. Tech.) MW2016-30 |
From the viewpoint of impedance transformation, the characteristic of a linear two-port network is determined by the imp... [more] |
MW2016-30 pp.1-5 |
WPT (2nd) |
2015-12-10 11:00 |
Overseas |
TamKang University, Tamsui Campus |
Sakihara-Moebius Harmonometer to Measure Simultaneous Voltage and Current on Nonlinear Devices and Circuits Masaru Tanaka, Kyohei Yamada, Naoki Sakai, Takashi Ohira (TUT) |
[more] |
|
MW, AP (Joint) |
2015-09-17 10:55 |
Tochigi |
Oyama National College of Tech. |
New Expression of Loss in LC Circuts Kyohei Yamada, Naoki Sakai, Takashi Ohira (TUT) MW2015-88 |
Two kinds of geometric expressions of losses in a matching circuit are presented using a concept of length or distance. ... [more] |
MW2015-88 pp.9-12 |
EE, WPT, IEE-SPC (Joint) [detail] |
2015-07-06 14:00 |
Kyoto |
|
Hyperbolic-Geometrywise Expression of Power Loss for Impedance Matching Circuits with Shunt/Series Elements by Poincare Metric Kyohei Yamada, Naoki Sakai, Takashi Ohira (TUT) WPT2015-36 |
[more] |
WPT2015-36 pp.1-6 |
WPT, MW |
2015-04-17 14:25 |
Tokyo |
Kikai-Shinko-Kaikan Bldg. |
Power Efficiency Formula for Unit LC Circuit to Match Complex-Impedance Ports
-- Expression Featuring Manhattan Distance and Voronoi Diagram -- Kyohei Yamada, Naoki Sakai, Takashi Ohira (TUT) WPT2015-16 MW2015-16 |
The efficiency of an L-shaped matching circuit consisting of two reactive elements is formulated. The efficiency formula... [more] |
WPT2015-16 MW2015-16 pp.81-85 |
EE, WPT (Joint) |
2014-11-19 11:25 |
Kyoto |
Doshisha University |
Proposal of High-Voltage Octuple-Current DC-to-DC Converter
-- ZVS-Condition Derivation and 1kV Prototype Design -- Daiya Egashira, Kyohei Yamada, Naoki Sakai, Takashi Ohira (Toyohashi Tech.) EE2014-24 |
In this paper, we propose high-voltage octuple-current DC-to-DC converter. The proposed DC-to-DC converter performs ZVS ... [more] |
EE2014-24 pp.31-36 |