Committee |
Date Time |
Place |
Paper Title / Authors |
Abstract |
Paper # |
EE |
2019-01-16 13:20 |
Kumamoto |
KCIC |
Analysis and design of wireless power transfer system based on class-D^2 DC-DC converter Shohei Mita, Hiroo Sekiya (Chiba Univ.) EE2018-42 |
This paper presents a design procedure of wireless power transfer system based on class-D2 converter, taking into accoun... [more] |
EE2018-42 pp.25-30 |
ICD, CPSY, CAS |
2018-12-23 16:10 |
Okinawa |
|
Comparison between Quadrature-modulation EPWM transmitters with a 90° and 180° hybrid in physical models Tomoaki Morita, Yohtraro Umeda (Tokyo Univ. of Science) CAS2018-115 ICD2018-99 CPSY2018-81 |
Quadrature-modulation envelope-pulse-width-modulation (EPWM) transmitter with a 180° (180HYB system) or 90° hybrid (90HY... [more] |
CAS2018-115 ICD2018-99 CPSY2018-81 pp.153-158 |
EE |
2018-01-29 13:15 |
Oita |
Satellite Campus Oita |
[Poster Presentation]
Analysis of wireless power transfer system with asymmetrical duty-cycle controlled class-D ZVS inverter Shohei Mita, Hiroo Sekiya (Chiba Univ.) EE2017-50 |
This paper presents a wireless power transfer system with the asymmetrical duty-cycle controlled class-D zero-voltage sw... [more] |
EE2017-50 pp.47-52 |
MW, EMCJ, EST, IEE-EMC [detail] |
2017-10-20 10:25 |
Akita |
Yupopo |
A Quadrature-modulation EPWM Transmitter That Uses Co-phase Sine Wave Carriers for I/Q Channel and a 90° Hybrid as a Signal Combiner Tomoaki Morita, Ryo Sakai, Yohtaro Umeda (Tokyo Univ. of Science), Yusuke Kozawa (Ibaraki Univ.) EMCJ2017-45 MW2017-97 EST2017-60 |
Quadrature-modulation (QM) envelope-pulse-width modulation (EPWM) transmitter with a 180° hybrid as a power combiner has... [more] |
EMCJ2017-45 MW2017-97 EST2017-60 pp.105-110 |
MW, ICD |
2017-03-03 09:25 |
Okayama |
Okayama Prefectural Univ. |
Quadrature-modulation Envelope-pulse-width-modulation Transmission System Using Quadrature Polarized Waves Ryo Sakai, Yohtaro Umeda, Yusuke Kozawa (Tokyo Univ. of Science) MW2016-204 ICD2016-134 |
This paper presents quantitative evaluation of power efficiency decrese by not satisfying the zero current switching (ZC... [more] |
MW2016-204 ICD2016-134 pp.89-94 |
EE |
2016-11-28 13:30 |
Tokyo |
Kikai-Shinko-Kaikan Bldg. |
[Poster Presentation]
Characteristics comparison of class-E^2 and class-D-E wireless power transfer system Takumi Noda, Takumi Murayama, Hiroo Sekiya (Chiba Univ.) EE2016-38 |
The class-D and the class-E inverter can be achieved the high-power conversion efficiency at high frequencies.
Therefor... [more] |
EE2016-38 pp.45-50 |
EE, WPT, IEE-SPC (Joint) [detail] |
2015-07-07 14:30 |
Kyoto |
|
Automatic Impedance Matching Technique by Using Air-Variable Capacitor for 6.78MHz-Band WPT System Teruhiko Yamamoto, Keisuke Mikami (Ryukoku Univ.), Tetsuya Ishida (Wave Technology), Toshio Ishizaki (Ryukoku Univ.) WPT2015-42 |
For practical application of WPT, it is necessary to reduce a mismatch loss when relative positions of resonators are ch... [more] |
WPT2015-42 pp.37-42 |
WPT, MW |
2015-04-17 09:55 |
Tokyo |
Kikai-Shinko-Kaikan Bldg. |
Study of distance-insensitive electric field coupling resonant wireless power transfer Ryuichi Namba, Yohtaro Umeda, Yusuke Kozawa (Tokyo Univ. of Science) WPT2015-9 MW2015-9 |
In recent years, resonant wireless power transmission technology for supplying electric power with high efficiency in el... [more] |
WPT2015-9 MW2015-9 pp.45-50 |
MW, ED |
2015-01-16 13:25 |
Tokyo |
Kikai-Shinko-Kaikan Bldg. |
Digital Doherty Transmitter with Envelope ΔΣ Modulated Class-D GaN Amplifier for 800 MHz band Keiichi Motoi (NEC), Andreas Wentzel (FBH), Masaaki Tanio, Shinichi Hori, Makoto Hayakawa (NEC), Wolfgang Heinrich (FBH), Kazuaki Kunihiro (NEC) ED2014-131 MW2014-195 |
This paper presents a novel transmitter (Tx) architecture combining voltage-mode class-D power amplifiers (PAs) with an ... [more] |
ED2014-131 MW2014-195 pp.83-88 |
MW |
2014-11-21 10:55 |
Nagasaki |
Nagasaki Univ. |
Quadrature-modulation Transmitter with Tri-level Delta-sigma Modulation for Generating Bi-level EPWM Signal Takashi Noda, Wataru Someya, Yoshiharu Iikura, Yohtaro Umeda, Yusuke Kozawa (Tokyo Univ. of Science) MW2014-139 |
This paper presents a quadrature-modulation (QM) envelope-pulse-width-modulation (EPWM) transmitter with delta-sigma tri... [more] |
MW2014-139 pp.83-88 |
MW |
2014-11-21 11:20 |
Nagasaki |
Nagasaki Univ. |
A Polar-modulation EPWM Transmitter with a Class-D Amplifier for OFDM Transmission Yoshiharu Iikura, Yohtaro Umeda, Yusuke Kozawa (Tokyo Univ. of Sience) MW2014-140 |
Power amplifiers for wireless communication systems demand high power efficiency and linearity. Of the available types o... [more] |
MW2014-140 pp.89-94 |
EE, WPT (Joint) |
2014-11-18 10:00 |
Kyoto |
Doshisha University |
A Novel ZVS Class-D Direct-Current-Resonance Wireless Power Transfer with GaN FETs Operated in 6.78MHz Tatsuya Hosotani (Murata Manufacturing) WPT2014-50 |
A novel ZVS class-D direct-current-resonance wireless power transfer with GaN FETs operated in 6.78MHz is proposed. A di... [more] |
WPT2014-50 pp.1-6 |
SWIM |
2014-08-21 13:55 |
Kyoto |
Ryukoku Univ.Ouniya Canvas |
How to design the web application in the cloud computing era Kenji Saotome (Hosei Univ.), Nobuhiro Kataoka (Tokai Univ.), Tsukasa Kudo (SIST), Masahiko Ishino (Bunkyo Univ.) SWIM2014-10 |
The cloud service PaaS has appeared that we can develop the Web application in non-programming. It will be spread in the... [more] |
SWIM2014-10 pp.13-16 |
TL |
2014-02-21 16:55 |
Chiba |
Chiba Univ. |
Influence of First Language on Requirement Analysis Methods
-- Class Diagram, Grounded Theory Approach, and Conceptual Data Modeling as Examples -- Shigeo Kaneda, Akio Ida, Takamasa Sakai (Doshisha Univ.) TL2013-63 |
Many requirement-analysis methods, such as a class diagram or a conceptual data modeling approach, are widely used for t... [more] |
TL2013-63 pp.13-18 |
KBSE |
2013-01-28 15:20 |
Tokyo |
Kikai-Shinko-Kaikan Bldg |
A Specification Class-Diagram Conversion Method from the Viewpoint of "Class-Diagram is English" Shigeo Kaneda, Akio Ida, Takamasa Sakai (Doshisha Univ.) KBSE2012-60 |
The authors claim that "Class diagrams" of UML are based on the mother tongue, English. Thus, Japanese specication desc... [more] |
KBSE2012-60 pp.13-18 |
RCS, NS (Joint) |
2010-07-15 10:30 |
Hokkaido |
Abashiri Public Auditorium |
Performance Evaluation of Gaussian Filtered Constant Envelope Modulation Systems with a Low-Resolution ADC Kohei Kotera, Osamu Muta, Hiroshi Furukawa (Kyushu Univ.) RCS2010-51 |
To a small size and power-efficient relay station for wireless backhaul networks,
the authors have proposed a multi-in... [more] |
RCS2010-51 pp.19-24 |
EE |
2007-11-19 13:55 |
Tokyo |
|
[Special Talk]
Hight efficiency amplifiers in MF and HF transmitter Masahiko Yamazoe (NHK), Kazuhisa Haeiwa (HIroshima City Univ), Hiroyuki Nishimori, Kouichi Misu (NHK) EE2007-41 |
This paper describes hight efficiency amplifiers in MF and HF transmitter. First , we fabricated a new power amplifier o... [more] |
EE2007-41 pp.39-44 |
IE, SIP, ICD, IPSJ-SLDM |
2004-10-22 14:15 |
Yamagata |
|
A class-D amplifier using a spectrum shaping technique Akira Yasuda (Hosei Univ.), Takashi Kimura, Koichiro Ochiai, Toshihiko Hamasaki (TI Japan) |
In this paper, we propose a new class-D amplifier with a lower-frequency reference signal by using a spectrum shap-ing t... [more] |
SIP2004-98 ICD2004-130 IE2004-74 pp.55-60 |