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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 24  /  [Next]  
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)
 [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]
WPT
(2nd)
2015-12-10
11:20
Overseas TamKang University, Tamsui Campus Impedance Matching Circuit Optimization for a Miniature EVER System from Hyperbolic Geometry
Kyohei Yamada, Naoki Sakai, Takashi Ohira (Toyohashi Univ. Tech.)
 [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
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