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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| MW | 2013-11-22 13:30 |
Kagoshima | Kagoshima Prefectural Culture Center | Design of High Efficiency Rectifier Circuit Shohei Iwai, Hitoshi Shimamura, Hiroto Sakaki, Kenjiro Nishikawa (Kagoshima Univ.)  MW2013-146 |
This paper proposes and demonstrates a high-efficiency rectifier circuit at low-input power operation. The proposed rect... [more] | MW2013-146 pp.85-90 |
| MW | 2013-11-22 14:00 |
Kagoshima | Kagoshima Prefectural Culture Center | Investigation of Relationship between Modulated Input Signals and RF-DC Power Conversion Efficiency of Rectifier for WiCoPT
-- Conversion Efficiency Comparison of CW, FSK, QPSK and 16QAM -- Hiroto Sakaki (Kagoshima Univ.), Satoshi Yoshida (JAXA), Tatsuro Kuwahara, Kenjiro Nishikawa (Kagoshima Univ.), Shigeo Kawasaki (JAXA) MW2013-147 |
Recently, Wireless Communication and Power Transmission (WiCoPT) has been proposed and devel- oped. This paper investiga... [more] | MW2013-147 pp.91-96 |
| EE, WPT, IEE-SPC (Joint) [detail] |
2013-07-25 09:30 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Measured Evaluation of DC Conversion Efficiency with Modulated Signal for WiCoPT Systems
-- Conversion Efficiency with FSK, BPSK, QPSK and 16QAM -- Hiroto Sakaki (Kagoshima Univ.), Satoshi Yoshida (JAXA), Kenjiro Nishikawa (Kagoshima Univ.), Shigeo Kawasaki (JAXA) |
Recently, the wireless system, which can transfer data and power simultaneously, called "Wireless Communication and Powe... [more] | |
| MW | 2013-03-08 10:15 |
Hiroshima | Hiroshima Univ. | Investigation of Rectifier Operation with Modulated Input Signal for WiCoPT Hiroto Sakaki (Kagoshima Univ.), Satoshi Yoshida (JAXA), Kenjiro Nishikawa (Kagoshima Univ.), Shigeo Kawasaki (JAXA) MW2012-183 |
This report presents analysis results of the RF-DC conversion efficiency in a rectifier with FSK modulate input signal. ... [more] | MW2012-183 pp.135-140 |
| SANE | 2011-04-21 13:50 |
Nagano | Usuda Deep Space Center, JAXA | A Prototype of a 500W-Class Compact Waveguide Combiner by GaN Power Amplifier Units for S-Band Space Communication Hirofumi Noji, Masakazu Hori, Yasuhiro Shibuya, Kosuke Isono (Tokyo Univ. of Science), Yuta Kobayashi (JAXA), Mitsuo Yamada (SED), Toshio Ishizaki (Ryuukoku Univ.), Sigeki Furuta, Yukio Moriguti (NETS), Tadashi Kawai (HPU), Kenjiro Nishikawa (Kagoshima Univ.), Takaji Kato, Zenichi Yamamoto, Shigeo Kawasaki (JAXA) SANE2011-3 |
[more] | SANE2011-3 pp.13-17 |
| AP | 2010-10-14 15:10 |
Iwate | Iwate Univ. | A Study of Short-range MIMO Transmission Using Dual Polarized Antenna Ken Hiraga (NTT), Kentaro Nishimori (Niigata Univ.), Tomohiro Seki, Kenjiro Nishikawa, Ichihiko Toyoda, Kazuhiro Uehara (NTT) AP2010-80 |
Recently, higher transmission speeds are expected for high definition images and video services. Multiple-input and mult... [more] | AP2010-80 pp.37-42 |
| MW | 2009-11-19 16:00 |
Kagoshima | Tanegashima | [Special Talk]
Report on 2009 IEEE MTT-S International Microwave Symposium Hiroshi Okazaki (NTT DOCOMO), Kenjiro Nishikawa (NTT Corp.), Yasunori Suzuki (NTT DOCOMO), Kensuke Okubo (Okayama Pref. Univ.), Tetsuya Ueda (Kyoto Inst. of Tech.), Akimichi Hirota (Mitsubishi Electric Corp.), Hirokazu Kamoda (NHK), Yasuhiro Nakasha (FUJITSU LABORATORIES LTD.) MW2009-134 |
Report on 2009 IEEE MTT-S International Microwave Symposium held in Boston, MA, USA, is presented. [more] | MW2009-134 pp.35-42 |
| MW (Workshop) |
2009-08-20 - 2009-08-21 |
Overseas | KMUTNB, Bangkok, Thailand | [Invited Talk]
Standardization of Millimeter-Wave Wireless Personal Area Networks Ichihiko Toyoda, Tomohiro Seki, Kenjiro Nishikawa (NTT) |
This paper describes the activities in the IEEE 802.15.3c task group for millimeter-wave wireless personal area networks... [more] | |
| AP, SAT (Joint) |
2009-07-08 16:05 |
Hokkaido | Otaru city, Hokkaido | High Speed Parallel Data Transmission Technology for Short Range Wireless Relay System Tomohiro Seki, Kentaro Nishimori, Ken Hiraga, Kenjiro Nishikawa (NTT) AP2009-55 |
[more] | AP2009-55 pp.65-70 |
| AP, SAT (Joint) |
2009-07-08 16:40 |
Hokkaido | Otaru city, Hokkaido | Effectiveness of Ultra High Speed Parallel Transmission in Near Field using Millimeter-wave Frequency Ken Hiraga, Tomohiro Seki, Kentaro Nishimori, Kenjiro Nishikawa, Kazuhiro Uehara (NTT) AP2009-56 |
Wider bandwidth, multiple valued modulation, and the spatial multiplex like MIMO, etc. has been put to practical use for... [more] | AP2009-56 pp.71-76 |
| AP, RCS (Joint) |
2008-11-20 14:25 |
Ishikawa | Kanazawa Institute of Technology | High Speed Parallel Data Transmission System for Near Field Wireless Relay System Tomohiro Seki, Kentaro Nishimori, Naoki Honma, Kenjiro Nishikawa (Nippon Telegraph and Telephone Corporation) AP2008-124 |
[more] | AP2008-124 pp.73-77 |
| SR | 2007-05-25 13:00 |
Tokyo | Broadband Low Noise Amplifier with High Linearity for Software-Defined Radios and Cognitive Radios Munenari Kawashima, Yo Yamaguchi, Kenjiro Nishikawa, Kazuhiro Uehara (NTT) SR2007-14 |
We propose a broadband low noise amplifier with high linearity. The amplifier achieves broadband, low noise performance ... [more] | SR2007-14 pp.79-83 |
|
| RCS, MoNA, WBS, SR, MW (Joint) |
2007-03-09 17:10 |
Kanagawa | YRP | Research and Standardization activty for IEEE802.15.3c mmW WPAN
-- (7) millimeter-wave RF front-end for IEEE 802.15.3c -- Chang-Soon Choi, Yozo Shoji, Hiroshi Harada, Ryuhei Funada, Hirokazu Sawada, Shuzo Kato (NICT), Kenichi Maruhashi (NEC), Ichihiko Toyoda (NTT), Kazuaki Takahashi, Yoshio Aoki (Matsushita), Kazufumi Igarashi (JRC), Tsukasa Yoneyama (MMEX), Kenjiro Nishikawa (NTT), Mitsuyuki Yamauchi (TAIYOYUDEN), Hiroyuki Nakase (Tohoku Univ) RCS2006-284 |
We present behavioral models of millimeter-wave power amplifiers and phase-locked oscillators for the evaluation of stan... [more] | RCS2006-284 pp.199-202 |
| RCS, AP, WBS, SR, MW, MoNA (Joint) |
2006-03-03 13:00 |
Kanagawa | YRP | 0.4 V, 5.6 mW InP HEMT V-band Low-Noise Amplifier MMIC Kenjiro Nishikawa, Takatomo Enoki, Suehiro Sugitani, Ichihiko Toyoda (NTT) |
This paper demonstrates the low-power operation of an InP HEMT 60-GHz band low-noise amplifier (LNA) MMIC. The device us... [more] | MW2005-180 pp.13-18 |
| MW | 2005-09-13 16:55 |
Tokyo | [Special Talk]
Report on 2005 IEEE MTT-S International Microwave Symposium Hiroshi Okazaki (NTT DoCoMo), Yoji Isota (Mitsubishi Electric), Shuya Kishimoto (NEC), Tadao Nakagawa, Kenjiro Nishikawa (NTT), Keren Li (NICT), Atsushi Sanada (Yamaguchi Univ.) |
Report on 2005 IEEE MTT-S International Microwave Symposium held in Long Beach, CA, USA, is presented. [more] | MW2005-85 pp.43-52 |
|
| AP | 2005-09-08 13:25 |
Aichi | TOYOTA CENTRAL R&D LABS., INC. | Design of high gain stacked rings antenna on multi-layer substrate Tomohiro Seki, Kenjiro Nishikawa, Ichihiko Toyoda, Koichi Tsunekawa (NTT) |
[more] | AP2005-72 pp.43-48 |
| AP | 2005-01-21 10:20 |
Saga | Saga University | A study of high gain antenna using multi-layer alumina-ceramic substrate for millimeter-wave frequency band Tomohiro Seki, Naoki Honma, Kenjiro Nishikawa, Koichi Tsunekawa (NTT) |
[more] | AP2004-213 pp.19-24 |
| AP | 2004-09-09 14:10 |
Kanagawa | National Defense Academy in JAPAN | 25 GHz Six-sector Antenna Employing Patch Yagi-Uda Array with Common Director Elements Naoki Honma, Tomohiro Seki, Kenjiro Nishikawa, Koichi Tsunekawa (NTT) |
In this paper, we investigate the effect of the phase error and manufacturing error to the properties of a six-sector an... [more] | AP2004-127 pp.17-22 |
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