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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
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Committee Date Time Place Paper Title / Authors Abstract Paper #
MW 2022-03-03
14:45
Online Online Frequency Characteristics on Vector Regulator Adjustment of Power Amplifier for Massive MIMO Base Stations
Kazuya Miyamoto, Shoichi Narahashi (Setsunan Univ.), Yasunori Suzuki, Hiroshi Okazaki (NTT DOCOMO) MW2021-123
This paper presents Frequency Characteristics on Vector Regulator Adjustment of 3.5-GHz Band Power Amplifier. Experiment... [more] MW2021-123
pp.69-72
MW 2022-03-04
09:20
Online Online A study of diode linearizer for 100 GHz amplifier toward 6G
Sumire Aoki, Hiroshi Hamada, Hiroto Yamamoto, Atsushi Fukuda (NTT DOCOMO), Jyo Teruo, Hiroyuki Takahashi (NTT), Hiroshi Okazaki, Yasunori Suzuki (NTT DOCOMO) MW2021-129
Sub-THz band (frequency range above 100 GHz) are gathering attention to implement 6G high-speed wireless communications.... [more] MW2021-129
pp.100-104
MW 2021-11-19
13:55
Kagoshima Kagoshima University
(Primary: On-site, Secondary: Online)
A Study on Coverage Extension by a Leaky Dielectric Waveguide with Dielectric Pieces Attached
Hiroto Yamamoto, Atsushi Fukuda, Hiroshi Okazaki, Yasunori Suzuki (NTT DOCOMO) MW2021-81
This paper presents an experimental study of coverage extension by a leaky dielectric waveguide that leaks radio waves f... [more] MW2021-81
pp.81-85
MW, WPT 2020-04-23
14:15
Online Online Investigation of Rectifier Operation with Harmonic Controlled Input Signals towards Pulse Modulation WiCoPT System
Runyuan Li, Satoshi Yoshida (Kagoshima Univ), Yasunori Suzuki, Hiroshi Okazaki (NTT DOCOMO), Kenjiro Nisikawa (Kagoshima Univ) WPT2020-5 MW2020-5
One of main issues on Wireless Communication and Power Transmission(WiCoPT) system is that modulated input signals degra... [more] WPT2020-5 MW2020-5
pp.25-30
MW 2019-11-15
11:00
Okinawa Minami Daido Villa. Tamokuteki Koryu Center Report on 2019 IEEE MTT-S International Microwave Symposium
Msaru Sato (Fujitsu Lab.), Takashi Shimizu (Utsunomiya Univ.), Yusuke Uemichi (Fujikura), Hiroyuki Aoyama (Mitsubishi Electoric), Tetsuya Ueda (KIT), Yuji Komatsuzaki (Mitsubishi Electoric), Hiroshi Hamada (NTT), Kyoya Takano (TUS), Hiroshi Okazaki (NTT DOCOMO) MW2019-114
This is a report on 2019 IEEE MTT-S International Symposium held at Boston, MA, USA, June 2-7, 2019. It contains an over... [more] MW2019-114
pp.81-86
MW, ICD 2019-03-14
15:40
Okinawa   Wide dynamic range rectifier circuit with varactor tuning technique
Ayako Suzuki, Koshi Hamano, Hayato Shimizu (Kagoshima Univ.), Hiroshi Okazaki, Kunihiro Kawai, Atsushi Fukuda, Yasunori Suzuki (NTT DOCOMO), Kenjiro Nishikawa (Kagoshima Univ.) MW2018-166 ICD2018-110
 [more] MW2018-166 ICD2018-110
pp.55-59
MW 2018-11-16
13:15
Nagasaki Fukue Cultural Hall [Special Talk] Report on 2018 IEEE MTT-S International Microwave Symposium
Takashi Shimizu (Utsunomiya Univ.), Ryo Ishikawa (UEC), Tetsuya Ueda (Kyoto Inst. of Tech.), Masataka Ohira (Saitama Univ.), Hiroshi Okazaki (NTT DOCOMO), Yuji Komatsuzaki (Mitsubishi Electric Corp.), Tamura Masaya (TUT) MW2018-110
 [more] MW2018-110
pp.95-102
AP, MW
(Joint)
2018-09-20
14:30
Tokyo Tokyo Tech A Study of Quasi-Millimeter Wave Transceiver Frontend Module
Takana Kaho, Yo Yamaguchi, Hiroyuki Shiba (NTT), Yasunori Suzuki, Hiroshi Okazaki (NTT DOCOM) MW2018-59
 [more] MW2018-59
pp.1-6
AP, MW
(Joint)
2018-09-21
10:20
Tokyo Tokyo Tech A study of statistical property of intermodulation distortion components generating by power amplifier
Yasunori Suzuki, Hiroshi OKazaki (NTT DOCOMO) MW2018-64
This paper presents a statistical property of intermodulation distortion components generating by power amplifier when i... [more] MW2018-64
pp.29-34
ED, MW 2018-01-26
11:00
Tokyo Kikai-Shinko-Kaikan Bldg. [Special Talk] Briefing Report on European Microwave Week 2017
Ryo Ishikawa (UEC), Shuhei Amakawa (Hiroshima Univ.), Chen Chun-Pin (Kanagawa Univ.), Tamio Kawaguchi (Toshiba), Hiroshi Okazaki (NTT DOCOMO) ED2017-100 MW2017-169
The Microwave Week 2017, comprising the European Microwave Conference (EuMC), European Rader Conference(EuRAD), and Euro... [more] ED2017-100 MW2017-169
pp.35-40
AP, MW
(Joint)
2017-09-21
14:00
Saitama Saitama University High Frequency Analog Beam Forming by Frequency Control of Local Oscillator
Atsushi Fukuda, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) MW2017-68
This paper proposes a novel configuration for a phased array antenna system (PAS) that achieves ultra-broadband transmis... [more] MW2017-68
pp.1-4
AP, MW
(Joint)
2017-09-21
14:25
Saitama Saitama University A Study of Quasi-Millimeter Wave Integrated Front-End Module Including Antenna and Filter
Yasunori Suzuki, Kei Satoh, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO), Takana Kaho, Yo Yamaguchi, Maki Arai, Hiroyuki Shiba (NTT) MW2017-69
 [more] MW2017-69
pp.5-9
AP, MW
(Joint)
2017-09-21
14:50
Saitama Saitama University A Study of Quasi-Millimeter Wave Frontend ICs and Modules
Takana Kaho, Yo Yamaguchi, Maki Arai, Hiroyuki Shiba (NTT), Yasunori Suzuki, Kei Sato, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) MW2017-70
Application of Massive MIMO and beamforming technology using array antennas in the quasi-millimeter wave band is being ... [more] MW2017-70
pp.11-15
AP, MW
(Joint)
2017-09-22
15:15
Saitama Saitama University A relation between polarization and radiation characteristics of flexible dielectirc wavguide
Kunihiro Kawai, Atsushi Fukuda, Hiroshi Okazaki, Takahiro Asai, Akira Yamada (NTT DOCOMO) MW2017-78
This paper presents radiation characteristics of bended flexible dielectric waveguides when the millimeter wave signal p... [more] MW2017-78
pp.59-62
MW
(2nd)
2017-06-14
- 2017-06-16
Overseas KMUTT, Bangkok, Thailand 28 GHz Band Power Amplifier for Massive MIMO Transmitter
Yasunori Suzuki, Kunihiro Kawai, Hiroshi Okazaki (DOCOMO)
This paper presents experimental results of 28 GHz band power amplifier for Massive MIMO transmitter. The power amplifie... [more]
MW 2016-11-17
16:00
Saga Saga Univ. [Special Talk] Report on 2016 IEEE MTT-S International Microwave Symposium
Masataka Ohira (Saitama Univ.), Hiroshi Okazaki (NTT DOCOMO), Hiroyuki Kayano (Toshiba), Masaru Sato (Fujitsu Lab.), Takashi Shimizu (Utsunomiya Univ.), Hiroshi Hamada (NTT) MW2016-125
This is a report on 2016 IEEE MTT-S International Microwave Symposium (IMS2016) in San Francisco, CA, USA, on May 22-27,... [more] MW2016-125
pp.49-55
AP, MW
(Joint)
2016-09-15
14:50
Ibaraki AIST Radiation characteristics of bended flexible dielectric waveguide for area formation of millimeter-wave wireless communication systems
Kunihiro Kawai, Atsushi Fukuda, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) MW2016-77
This paper presents radiation characteristics of two bended flexible dielectric waveguides in millimeter wave frequencie... [more] MW2016-77
pp.23-26
MW
(2nd)
2016-06-09
- 2016-06-11
Overseas KMUTNB, Bangkok, Thailand Broadband, Flat-gain, and High Liniarity GaN HEMT LNA for Mobile Base Station
Masanobu Tsujii, Koshi Hamano, Kenjiro Nishikawa (Kagoshima Univ.), Kunihiro Kawai, Hiroshi Okazaki, Syoichi Narahashi (NTT DOCOMO, INC.)
This paper demonstrates a broadband GaN HEMT Low Noise Amplifier (LNA) with high linearity. The proposed two-stage LNA e... [more]
MW, AP
(Joint)
2015-09-17
10:30
Tochigi Oyama National College of Tech. An estimation of third order PIM using one continuous wave
Kunihiro Kawai, Atsushi Fukuda, Yuta Takagi, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) MW2015-87
This paper presents an estimation method for a third order passive intermodulation distortion (PIM) using one continuous... [more] MW2015-87
pp.1-8
EMCJ, WPT
(Joint)
2015-01-22
14:00
Okinawa Okinawaken Jichikaikan A Novel Wide Dynamic Range and Dual Band Rectifier Design for Wireless Power Transfer System
Hiroto Sakaki, Fumito Kuroiwa, Masanobu Tsujii, Kenjiro Nishikawa (Kagoshima Univ.), Kunihiro Kawai, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) WPT2014-81
 [more] WPT2014-81
pp.19-24
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