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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 27  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
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
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]
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
AP, MW
(Joint)
2014-09-19
13:00
Tokyo Tokyo Institute of Technology, Ookayama Campus An RF front-end circuit for inter-band carrier aggregation
Kunihiro Kawai (NTT DOCOMO), Mitsumasa Nakajima (NTT), Yuta Takagi, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) MW2014-95
This paper proposes an RF front-end circuit for mobile terminals supporting inter-band carrier aggregation using two fre... [more] MW2014-95
pp.55-58
MW 2013-03-07
16:05
Hiroshima Hiroshima Univ. [Special Talk] Briefing Report on European Microwave Week 2012
Kunihiro Kawai (NTT DOCOMO), Kazuhiko Honjo (Univ. of Electro-Comm.), Ramesh Pokharel (Kyushu Univ.), Futoshi Kuroki (KNCT), Chun-Ping Chen (Kanagawa Univ.), Hirokazu Kamoda (ATR) MW2012-181
The Microwave week 2012, comprising the European Microwave Conference, European Radar Conference, and European Microwave... [more] MW2012-181
pp.121-128
SR 2012-05-24
17:15
Kanagawa Keio univ. at Hiyoshi [Panel Discussion] Multi-band operation for mobile terminals
Shoichi Narahashi, Hiroshi Okazaki, Atsushi Fukuda, Takayuki Furuta, Kunihiro Kawai, Kei Satoh, Yuta Takagi (NTT DOCOMO) SR2012-12
It is a key issue for radio frequency (RF) circuits of future mobile terminals to equip with multi-band operation archit... [more] SR2012-12
pp.73-78
MW 2012-03-01
16:15
Saga Saga University [Special Talk] An Attendee Report on European Microwave Week 2011
Yasushi Horii (Kansai Univ.), Akimichi Hirota (Mitsubishi Electric), Chun-Ping Chen (Kanagawa Univ.), Kunihiro Kawai (NTT DOCOMO), Koji Yamanaka (Mitsubishi Electric), Ramesh Pokharel (Kyushu Univ.) MW2011-177
This is an attendee report on the international conference of European Microwave Week (EuMW) 2011, including a statistic... [more] MW2011-177
pp.53-60
SR 2011-07-28
15:05
Kanagawa YRP [Technology Exhibit] A Reconfigurable Power Amplifier for Multi-band/Multi-mode Mobile Terminals
Takayuki Furuta, Atsushi Fukuda, Kunihiro Kawai, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) SR2011-23
 [more] SR2011-23
pp.37-40
AP, MW
(Joint)
2011-03-03
11:25
Ibaraki Ibaraki Univ. Center Frequency and Bandwidth Tunable Filter with Symmetric Attenuation Characteristics
Kunihiro Kawai, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) MW2010-156
This paper proposes a novel tunable resonator and bandpass filter that have symmetric attenuation characteristics about ... [more] MW2010-156
pp.23-26
MW 2010-12-17
09:50
Ishikawa Kanazawa Inst. of Tech. Multi-band Power Amplifier on an LTCC Substrate
Takayuki Furuta, Atsushi Fukuda, Kunihiro Kawai, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) MW2010-130
 [more] MW2010-130
pp.47-50
MW 2010-11-25
16:50
Okinawa Tiruru [Special Talk] Briefing Report on 2010 IEEE MTT-S International Microwave Symposium
Shoichi Narahashi, Kunihiro Kawai (NTT DOCOMO), Kensuke Okubo (Okayama Prefectural Univ.), Masahiro Horibe (AIST), Takana Kaho (NTT), Kazuhisa Yamauchi (Mitsubishi), Kengo Kawasaki (Saga Univ.) MW2010-113
IEEE MTT-S International Microwave Symposium (IMS) was held in Anaheim, the United States, from May 23 to 28, 2010. This... [more] MW2010-113
pp.45-54
MW 2010-03-05
14:30
Kyoto Ryukoku Univ. [Special Talk] Briefing Report on European Microwave Conference 2009
Shoichi Narahashi, Kunihiro Kawai, Takayuki Furuta (NTT DOCOMO), Tetsuya Ueda (Kyoto Institute of Technology), Takayoshi Ito (Toshiba), Noboru Oishi (Mitsubishi Electric) MW2009-207
The Microwave week 2009, comprising the European Microwave Conference, European Wireless Technology Conference, European... [more] MW2009-207
pp.159-168
EMCJ, MW, IEE-MAG 2009-10-23
11:30
Iwate Iwate Univ. Center Frequency, Bandwidth, and Transfer Function Tunable Bandpass Filter Employing Tunable Ring Resonator
Kunihiro Kawai, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) EMCJ2009-65 MW2009-114
This paper presents a novel tunable bandpass filter that configures its center frequency, bandwidth, and transfer functi... [more] EMCJ2009-65 MW2009-114
pp.123-128
MW 2009-03-06
17:30
Tokyo NHK Science & Technical Research Lab. [Special Talk] Briefing Report on European Microwave Conference 2008
Shoichi Narahashi, Kei Satoh, Kunihiro Kawai (NTT DOCOMO), Tetsuo Anada, Chun-Ping Chen (Kanagawa Univ.), Kazuhiro Fujimori (Okayama Univ.), Hiroyuki Takahashi (NTT), Hiroyuki Kayano (Toshiba), Kazuhisa Yamauchi, Masaomi Tsuru (Mitsubishi Electric), Takuo Kashiwa (Furuno Electric) MW2008-209
The Microwave week 2008, comprising the European Microwave Conference, European Wireless Technology Conference, European... [more] MW2008-209
pp.111-122
RCS, AN, MoNA, SR
(Joint)
2009-03-05
10:55
Kanagawa YRP Multi-band RF circuits for mobile terminals
Shoichi Narahashi, Hiroshi Okazaki, Atsushi Fukuda, Kunihiro Kawai, Takayuki Furuta (NTT DOCOMO) SR2008-106
Future mobile terminals will be operated in a wireless environment where various kinds of wireless systems will co-exist... [more] SR2008-106
pp.117-120
MW 2008-06-27
10:30
Aichi Toyohashi Univ. of Tech. Ring Resonators for Bandwidth and Center Frequency Tunable Filter
Kunihiro Kawai, Hiroshi Okazaki, Shoichi Narahashi (NTT DoCoMo) MW2008-35
This paper presents novel and simple-structured tunable resonators for tunable bandpass filter that individually varies ... [more] MW2008-35
pp.25-28
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