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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| 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 | 2014-05-22 09:30 |
Kyoto | Doshisha Univ. | A Circuit Construction of Parallel Ring-Lines Type Rat-Race Circuit with Very Loose Coupling Utilizing Composite Right-/Left-Handed Transmission Lines Yousuke Daimon, Tadashi Kawai, Akira Enokihara, Isao Ohta (Univ. of Hyogo), Kei Satoh, Yasunori Suzuki, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) MW2014-25 |
[more] | MW2014-25 pp.7-12 |
| MW | 2014-03-04 11:50 |
Ehime | Ehime University | Design of Broadband Branch-Line Hybrid with Loose Coupling Utilizing Open-/Short-Circuited Coupled Transmission Lines Nobuo Nakajima, Tadashi Kawai, Akira Enokihara, Isao Ohta (Univ. of Hyogo), Kei Satoh, Yasunori Suzuki, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) MW2013-201 |
This paper describes broadband branch-line hybrids with loose coupling factors utilizing open-/short-circuited coupled t... [more] | MW2013-201 pp.23-27 |
| MW | 2013-11-21 15:45 |
Kagoshima | Kagoshima Prefectural Culture Center | [Special Talk]
Report on 2013 IEEE MTT-S International Microwave Symposium Masataka Ohira (Saitama Univ.), Tetsuya Ueda (Kyoto Inst. Tech.), Hiroshi Okazaki (NTT DOCOMO), Eigo Kuwata (Mitsubishi Electric Corp.), Hiroyuki Takahashi (NTT), Shotaro Nagai (Yamaguchi Univ.), Zhewang Ma (Saitama Univ.), Shingo Yamanouchi (NEC) MW2013-140 |
This is a report on 2013 IEEE MTT-S International Microwave Symposium (IMS 2013) held at Seattle, WA, USA, on June 2-7, ... [more] | MW2013-140 pp.51-60 |
| MW, AP (Joint) |
2013-09-13 16:15 |
Tokyo | NHK Science Tech. Research Lab. | Super High Bit Rate Mobile Future Radio Access System using SHF/EHF Bands Yukihiko Okumura, Shoichi Narahashi, Tetsuro Imai, Satoshi Suyama, Hiroshi Okazaki, Yasunori Suzuki (NTT DOCOMO) MW2013-99 |
In this report, in order to realize future super high bit rate and high capacity mobile communication network, on the pr... [more] | MW2013-99 pp.65-70 |
| MW | 2013-03-06 10:00 |
Hiroshima | Hiroshima Univ. | Analysis on a new matching network for a compact multi-band PA Takayuki Furuta, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) MW2012-158 |
[more] | MW2012-158 pp.1-6 |
| MW | 2012-12-13 16:15 |
Yamanashi | Univ. of Yamanashi | Parallel-Ring-Type Rat-Race Circuit for Loose Coupling Utilizing Composite Right/Left-Handed Transmission Lines Yuma Simitomo, Tadashi Kawai, Akira Enokihara, Isao Ohta (Univ. of Hyogo), Kei Satoh, Yasunori Suzuki, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) MW2012-132 |
This paper treats a parallel-ring-type rat-race circuit for loose coupling utilizing composite right-/left-handed transm... [more] | MW2012-132 pp.31-36 |
| MW | 2012-11-21 14:45 |
Okinawa | [Special Talk]
Report on 2012 IEEE MTT-S International Microwave Symposium Takashi Shimizu (Utsunomiya Univ.), Masataka Ohira (Saitama Univ.), Hiroshi Okazaki (NTT DOCOMO), Chun-Ping Chen (Kanagawa Univ.), Shoichi Narahashi (NTT DOCOMO), Ramesh Pokharel (Kyushu Univ.), Koji Yamanaka (Mitsubishi Electric Corp.) MW2012-116 |
This is a report on 2012 IEEE MTT-S International Microwave Symposium held at Montreal, QC, CA, June 18-22, 2012. It co... [more] | MW2012-116 pp.13-22 |
|
| 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 | 2012-03-02 13:00 |
Saga | Saga University | High Power Operation for Broadband Branch-Line Coupler with Coupled Lines Tadashi Kawai, Toshiki Hayashi, Akira Enokihara, Isao Ohta (Univ. of Hyogo), Kei Satoh, Yasunori Suzuki, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) MW2011-184 |
[more] | MW2011-184 pp.91-95 |
| MW | 2011-11-24 16:15 |
Okinawa | [Special Talk]
Report on 2011 IEEE MTT-S International Microwave Symposium Tetsuya Ueda (Kyoto Inst. of Tech.), Masataka Ohira (Saitama Univ.), Hiroshi Okazaki (NTT DOCOMO), Hiroyuki Kayano, Yukako Tsutsumi (Toshiba Corp.), Hideyuki Nosaka (NTT), Hifumi Noto (Mitsubishi Electric Corp.), Ramesh Pokharel (Kyushu Univ.) MW2011-116 |
This is a report on 2011 IEEE MTT-S International Microwave Symposium held at Baltimore, Maryland, USA, June 5-10, 2011.... [more] | MW2011-116 pp.15-24 |
|
| 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 | 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 |
| 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 |
| 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 |
| SR | 2008-08-01 10:00 |
Tokyo | NICT (Koganei,-city Tokyo) | [Technology Exhibit]
Reconfigurable RF Front End
-- A Multiband Power Amplifier -- Atsushi Fukuda, Hiroshi Okazaki, Shoichi Narahashi (NTT DoCoMo) SR2008-34 |
Future mobile terminals will operate in the wireless environment where the variety of wireless systems coexist and inter... [more] | SR2008-34 pp.109-112 |
| SR | 2008-08-01 10:00 |
Tokyo | NICT (Koganei,-city Tokyo) | [Technology Exhibit]
Study on a Reconfigurable RF Frontend
-- A Band-Tunable Isolator -- Takayuki Furuta, Atsushi Fukuda, Hiroshi Okazaki, Shoichi Narahashi (NTTDoCoMo) SR2008-36 |
A reconfigurable RF front-end is a promising candidate for future multi-band mobile terminals. A band-tunable isolator ... [more] | SR2008-36 pp.119-122 |
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