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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 18 of 18  /   
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 speci cation 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
 Results 1 - 18 of 18  /   
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