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All Technical Committee Conferences (Searched in: All Years)
| 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 |
| 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) |
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 |
| AP (2nd) |
2016-03-01 11:25 |
Overseas | Telecommunications University, Nha Trang, Vietnam | Numerical Estimation of 4.4GHz-band Propagation Characterisics in Aircraft Cabin Using Large-Scale FDTD analysis Kanji Yahagi, Masami Shirafune, Takashi Hikage, Manabu Yamamoto, Shoichi Narahashi, Toshio Nojima (Hokkaido Univ.), Syunichi Futatsumori, Akiko Kohmura, Naruto Yonemoto (ENRI) |
[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 |
| MW, AP (Joint) |
2015-09-17 13:55 |
Tochigi | Oyama National College of Tech. | [Invited Lecture]
RF front-end configuration of Massive-MIMO base station Yasunori Suzuki, Kei Satoh, Makoto Sumi, Atsushi Fukuda, Shoichi Narahashi (NTT DOCOMO) AP2015-83 MW2015-90 |
This paper presents an overview of requirements and technical issues regarding a RF front-end module for Massive-MIMO ba... [more] | AP2015-83 MW2015-90 pp.21-25(AP), pp.19-23(MW) |
| 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) |
2014-09-18 09:30 |
Tokyo | Tokyo Institute of Technology, Ookayama Campus | [Invited Lecture]
A Basic Study on Quad-band Bandpass Filter with Line Structure Comprising Cascade Connection of CRLH-TL Cells Having Two Different Element Values Kei Satoh, Yasunori Suzuki, Yuta Takagi, Shoichi Narahashi (NTT DOCOMO) AP2014-91 MW2014-84 |
This paper presents a basic study on a quad-band bandpass filter (QBPF) with a line structure comprising cascade connect... [more] | AP2014-91 MW2014-84 pp.1-4 |
| 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 10:00 |
Kagoshima | Kagoshima Prefectural Culture Center | Dual-Band Linearization of Digital Predistorter Compensating Frequency-Dependent IMD components Yasunori Suzuki, Junya Ohkawara, Shoichi Narahashi (DOCOMO) MW2013-132 |
This paper presents a dual-band digital predistortion linearizer (DPDL) compensating frequency-dependent imtertmodualtio... [more] | MW2013-132 pp.5-10 |
| 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 | 2013-03-06 13:25 |
Hiroshima | Hiroshima Univ. | Miniaturization of a Multilayered Dual-Band Bandpass Filter Yuta Takagi, Kei Satoh, Shoichi Narahashi (NTT DOCOMO) MW2012-164 |
[more] | MW2012-164 pp.33-36 |
| 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 |
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