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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| WPT | 2022-03-08 16:15 |
Kyoto | (Primary: On-site, Secondary: Online) |
A Study on Feeding Position and Radiation Characteristic of a Composite Right/Left-Handed Waveguide for a Microwave Snow Melting System Keito Togawa, Tsunayuki Yamamoto (NIT, Tsuyama College), Tamami Maruyama, Masashi Nakatsugawa, Takahiko Nakamura (NIT, Hakodate College), Keiichi Ito (NIT, Akita College), Mituru Muramoto, Yutaka Nasuno (NIT, Tomakomai College), Kohzoh Ohshima (NIT, Tsuyama College), Manabu Omiya (Hookaido Univ.)  WPT2021-41 |
In our research of a microwave snow melting system, the system is composed of a circuit-shaped waveguide, and an electro... [more] | WPT2021-41 pp.89-92 |
| MW | 2022-03-03 10:15 |
Online | Online | Applicability of Phase Modulation Scheme for Wireless Power Transmission System to Simultaneously Deliver Power and Signals Takuro Ito, Masashi Nakatsugawa (NIT, Hakodate College), Shinji Abe, Takashi Ohira (TUT) MW2021-114 |
IoT and 5G systems are being introduced in the world. Wireless power transmission with information can further expand th... [more] | MW2021-114 pp.18-23 |
| MW | 2022-03-03 10:45 |
Online | Online | Installation Position Dependency of Wireless Power Transmission Efficiency between Circuit Shape Leaky Waveguide and Half Wavelength Dipole Antenna Yusho Kanaya, Masashi Nakatsugawa, Tamami Maruyama (NIT, Hakodate College), Manabu Omiya (Hokkaido Univ.), Yasuhiro Tamayama (NUT) MW2021-115 |
The wireless power transfer characteristics between a circuit-shape leaky waveguide and a /2 dipole antenna were analyz... [more] | MW2021-115 pp.24-29 |
| EST | 2022-01-27 18:20 |
Online | Online | Shape Optimization of Radome for Waveguide Slot Antenna Aimed at Melting Snow Keiichi Itoh, Ruka Tobisawa (NIT, Akita), Tamami Maruyama, Masashi Nakatsugawa, Takahiko Nakamura (NIT, Hakodate), Mitsuru Muramoto, Yutaka Nasuno (NIT, Tomakomai), Kohzoh Ohshima (NIT, Asahikawa), Tsunayuki Yamamoto (NIT, Tsuyama), Manabu Omiya (Hokkaido Univ.), Yasuhiro Tamayama (Nagaoka Univ. Tech.) EST2021-78 |
In recent years, a novel snowmelt method, heating mortar blocks by microwaves, has been attracted attention. The purpose... [more] | EST2021-78 pp.104-109 |
| MW | 2021-12-16 13:50 |
Kanagawa | Kawasaki City Industrial Promotion Hall (Primary: On-site, Secondary: Online) |
A Phase Shifter Composed of Reduced-Size Rat-Race Coupler with CRLH Transmission Lines and Resonating Reactance Circuits Masashi Nakatsugawa, Fusuke Kurotani, Yuya Chiba, Takuro Ito, Tamami Maruyama (NIT, Hakodate College) MW2021-89 |
An analog phase shifter that could continuously operate more than 180-degree phase-shift range was proposed and fabricat... [more] | MW2021-89 pp.25-30 |
| EMCJ, EMD, WPT (Joint) |
2021-07-02 14:45 |
Online | Online | EM-Field Visualization by Using a Half Wavelength LED Dipole Antenna Masashi Nakatsugawa, Daiki Ikeno, Tamami Maruyama (NIT, Hakodate College), Yasuhiro Tamayama (Nagaoka Univ. of Technol.) WPT2021-6 |
An EM-field measurement method by using a half wavelength LED dipole antenna was proposed. The LED in the antenna can be... [more] | WPT2021-6 pp.7-12 |
| WPT, MW | 2021-04-16 14:20 |
Online | Online | Improvement of wireless power transmission efficiency by inserting relay coil with optimized load impedance Tamami Maruyama, Tai Kimura, Masashi Nakatsugawa (NIT, Hakodate College) WPT2021-4 MW2021-4 |
In previous work, we investigated on the improvement of wireless power transmission efficiency by inserting a non-feedin... [more] | WPT2021-4 MW2021-4 pp.16-20 |
| WPT | 2021-03-05 14:00 |
Online | Online | Novel Design of 2.4GHz Band Right- and Left-handed Waveguide Arrays for Snow Melting Yuji Koita, Kazusa Ohno, Shunta Kasai, Tamami Maruyama, Masashi Nakatsugawa (NIT, Hakodate), Yasuhiro Tamayama (Nagoya Univ) WPT2020-48 |
Leaky waveguides with slots are used for snowmelting in microwave band. When a plurality of waveguides are arranged to ... [more] | WPT2020-48 pp.73-78 |
| WPT | 2021-03-05 14:25 |
Online | Online | FDTD analysis of leaky waves from circuit-shaped waveguides for snowmelting using microwave Shunta Kasai, Yuji Koita, Kazusa Ohno, Tamami Maruyama (NIT,Hakodate), Manabu Omiya (Hokkaido University), Masashi Nakatsugawa (NIT,Hakodate), Tamayama Yasuhiro (Nagaoka University of technology) WPT2020-49 |
A circuit-shape waveguide is proposed to evenly melt snow in an area by microwave heating and to reduce the installation... [more] | WPT2020-49 pp.79-82 |
| WPT | 2020-12-08 13:30 |
Online | Online | Study of energy harvesting applying the multi sector Yagi-Uda array antenna Tamami Maruyama, Tai Kimura, Shunta Kasai, Masashi Nakatsugawa (NIT, Hakodate College) WPT2020-27 |
This paper proposes novel multi-sector Yagi-Uda rectenna to achieve wide area wireless power transmission. The proposed ... [more] | WPT2020-27 pp.7-10 |
| RCS | 2016-06-23 14:50 |
Okinawa | Univ. of the Ryukyus | Experimental Evaluation for 26GHz Band under a Crowded Indoor Environment Masashi Iwabuchi, Toshiyuki Shintaku, Mizuki Suga, Takeshi Onizawa, Tetsu Sakata, Masashi Nakatsugawa (NTT) RCS2016-70 |
This report describes the experimental performance of higher-frequency bands which is expected to apply to future wirele... [more] | RCS2016-70 pp.141-146 |
| MW | 2016-01-15 13:05 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | [Memorial Lecture]
Projects for MW 50th anniversary Yohei Ishikawa (Kyoto Univ.), Takao Kuki (Doshisha Univ.), Masashi Nakatsugawa (NTT), Kenjiro Nishikawa (Kagoshima Univ.), Yo Yamaguchi (NTT), Junji Sato (Panasonic), Ryo Ishikawa (UEC), Naoto Sekiya (Yamanashi Univ.) MW2015-166 |
[more] | MW2015-166 pp.37-40 |
| NS, RCS (Joint) |
2015-12-17 13:30 |
Ehime | Matsuyama Community Center | [Invited Lecture]
5G R&D Activities for High Capacity Technologies with Ultra High-Density Multi-Band and Multi-Access Layered Cells Morihiko Minowa, Hiroyuki Seki (Fujitsu), Yukihiko Okumura, Satoshi Suyama (NTT DOCOMO), Akihiro Otaka, Shunji Kimura, Masashi Nakatsugawa (NTT), Hiroaki Asano, Yasufumi Ichikawa (Panasonic), Yukio Hirano (Mitsubishi Electric), Yasushi Yamao (UEC), Fumiyuki Adachi (Tohoku University), Masataka Nakazawa (Tohoku Univ.) NS2015-134 RCS2015-250 |
In this report, we introduce our 5G R&D activities for “High Capacity Technologies with Ultra High-Density Multi-Band an... [more] | NS2015-134 RCS2015-250 pp.43-48(NS), pp.41-46(RCS) |
| MW, AP (Joint) |
2015-09-18 10:55 |
Tochigi | Oyama National College of Tech. | [Invited Lecture]
Path Loss Characteristics from 0.8 GHz and 37 GHz Bands in Indoor Office Environment Motoharu Sasaki, Minoru Inomata, Wataru Yamada, Takeshi Onizawa, Masashi Nakatsugawa (NTT) AP2015-88 MW2015-94 |
[more] | AP2015-88 MW2015-94 pp.49-54(AP), pp.35-40(MW) |
| MW (2nd) |
2014-11-26 - 2014-11-28 |
Overseas | King Mongkut's Institute of Technology Ladkrabang (KMITL), Bangkok | [Invited Talk]
Wireless Systems for Disaster Recovery Operations
-- System development based on the experiences of the Great East Japan Earthquake -- Masashi Nakatsugawa, Fusao Nuno, Takashi Hirose (NTT) |
This paper presents wireless systems for disaster recovery operations. The disaster of the Great East Japan Earthquake i... [more] | |
| RCS, SIP | 2010-01-21 15:40 |
Fukuoka | Kyushu Univ. | Spectral Efficiency Improvement with Inter-Cluster Interference Canceling for Multiuser-MIMO Distributed Antenna Systems Kazuki Maruta, Takashi Maruyama, Atsushi Ohta, Jun Mashino, Masashi Nakatsugawa (NTT Corp.) SIP2009-97 RCS2009-231 |
Distributed Antenna Systems (DAS) have been studied as a method to enable effective frequency resources utilization. Nei... [more] | SIP2009-97 RCS2009-231 pp.139-144 |
| AN | 2008-07-24 13:25 |
Hokkaido | Hakodate National College of Technology | A Study of the Frame Structure to Improve System Capacity and Latency Performances for a Time-Division Duplex Multihop Relay Wireless Access System Youhei Ohno, Tatsuya Shimizu, Masashi Nakatsugawa (NTT) AN2008-16 |
[more] | AN2008-16 pp.7-12 |
| RCS | 2006-06-22 16:00 |
Aichi | Nagoya Inst. Tech. | [Invited Talk]
* Tatsuya Shimizu, Masamitsu Nakura, , Makoto Umeuchi, Naoki Kita, Wataru Yamada, , Hiroshi Nakamoto, Masashi Nakatsugawa (NTT) RCS2006-42 |
[more] | RCS2006-42 pp.43-48 |
| RCS, CS | 2005-01-28 13:00 |
Okinawa | University of the Ryukyus | Automatic LUT Estimation for Baseband Predistortion Hiroyuki Nakamura, Kazuji Watanabe, Takashi Maruyama, Masashi Nakatsugawa (NTT) |
It is important to estimate the I/O characteristic of the target amplifier to obtain better performance of the distortio... [more] | CS2004-207 RCS2004-314 pp.143-148 |
| AP | 2005-01-21 15:35 |
Saga | Saga University | Effect of site diversity for rainfall attenuation in Quasi-millimeter FWA systems Takashi Maruyama, Hiroyuki Nakamura, Masashi Nakatsugawa, Kazuji Watanabe, Mamoru Akimoto (NTT) |
In quasi-millimeter FWA systems, the rainfall margin for the design of wireless links needs to be considered due to the ... [more] | AP2004-220 pp.61-66 |
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