Committee |
Date Time |
Place |
Paper Title / Authors |
Abstract |
Paper # |
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 |
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 |
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 |
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 |
OPE, MW, MWP, EMT, EST, IEE-EMT [detail] |
2011-07-22 12:15 |
Hokkaido |
|
Dual-Band Bandpass Filter Using Multilayered LTCC Technologies Yuta Takagi, Kei Satoh, Shoichi Narahashi (NTT DOCOMO) MW2011-61 OPE2011-48 EST2011-47 MWP2011-29 |
[more] |
MW2011-61 OPE2011-48 EST2011-47 MWP2011-29 pp.131-134 |
MW |
2011-06-23 15:15 |
Gifu |
National Institute for Fusion Science |
New Approach for Configuring a Compact High-Temperature Superconducting Dual-Band Bandpass Filter Yuta Takagi, Kei Satoh, Shoichi Narahashi (NTT DOCOMO) MW2011-34 |
[more] |
MW2011-34 pp.13-16 |
CPM, SDM, ED |
2011-05-19 09:25 |
Aichi |
Nagoya Univ. (VBL) |
High thickness AlN growth with period trench patterned c-plane AlN on a-plane Sapphire by low-pressure HVPE Yuta Takagi, Hideto Miyake, Kazumasa Hiramatsu (Mie Univ.) ED2011-2 CPM2011-9 SDM2011-15 |
[more] |
ED2011-2 CPM2011-9 SDM2011-15 pp.7-10 |
SCE, MW |
2010-04-23 10:45 |
Tokyo |
Kikai-Shinko-Kaikan Bldg. |
High-Temperature Superconducting Parallel-Planar Dual-Band Bandpass Filter
-- Evaluation of Frequency Responses Affected by Temperature Difference between Two Substrates -- Yuta Takagi, Kei Satoh, Daisuke Koizumi, Shoichi Narahashi (NTT DOCOMO) SCE2010-4 MW2010-4 |
We have been proposed a high-temperature superconducting parallel-planar dual-band bandpass filter (HTS-DBPF) which has ... [more] |
SCE2010-4 MW2010-4 pp.17-22 |
SCE, MW |
2010-04-23 11:10 |
Tokyo |
Kikai-Shinko-Kaikan Bldg. |
Available fractional bandwidths for high temperature superconducting compact dual-band bandpass filter Kei Satoh, Yuta Takagi, Shoichi Narahashi (NTT DOCOMO), Toshio Nojima (Hokkaido Univ.) SCE2010-5 MW2010-5 |
This paper presents a flexible design method for dual-band bandpass filters. The gist of the proposed method lies in usi... [more] |
SCE2010-5 MW2010-5 pp.23-26 |
MW (Workshop) |
2009-08-20 - 2009-08-21 |
Overseas |
KMUTNB, Bangkok, Thailand |
Compact 2.1-/2.7-GHz High Temperature Superconducting Bandpass Filter Yuta Takagi, Kei Satoh, Shoichi Narahashi (NTT DOCOMO) |
This paper proposes a compact high temperature superconducting (HTS) dual-band bandpass filter (DBPF). The architecture ... [more] |
|
MW (Workshop) |
2009-08-20 - 2009-08-21 |
Overseas |
KMUTNB, Bangkok, Thailand |
2.0-/3.5-GHz Bandpass Filter Employing Quarter-Wavelength Resonator with Open Stubs Kei Satoh, Yuta Takagi, Shoichi Narahashi (NTT DOCOMO), Toshio Nojima (Hokkaido Univ.) |
This paper presents a dual-band bandpass filter (DBPF) that has coplanar-waveguide quarter-wavelength resonators with op... [more] |
|
MW |
2008-06-27 10:50 |
Aichi |
Toyohashi Univ. of Tech. |
A four-pole CPW dual-band bandpass filter Kei Satoh, Yuta Takagi, Shoichi Narahashi (NTT DoCoMo) MW2008-36 |
This paper proposes a newly developed CPW quarter-wavelength resonator with open stubs for use in a multipole dual-band ... [more] |
MW2008-36 pp.29-32 |
AP, SAT (Joint) |
2006-07-06 13:00 |
Hiroshima |
Hiroshima Institute of Technology |
Fixed point arithmetic of FDTD method in lossy dielectric Ryo Yamaguchi, Hidetoshi Suzuki, Yuta Takagi, Shinji Uebayashi (NTT DoCoMo) AP2006-43 |
[more] |
AP2006-43 pp.25-29 |
AP, SAT (Joint) |
2006-05-19 10:50 |
Kagoshima |
Kagoshima Univ. |
Estimation of accuracy for fixed point arithmetic FDTD method Ryo Yamaguchi, Hidetoshi Suzuki, Yuta Takagi, Shinji Uebayashi (NTT DoCoMo) AP2006-21 |
[more] |
AP2006-21 pp.71-76 |
AP, SAT (Joint) |
2005-07-20 16:15 |
Hokkaido |
Hotel Taisetsu |
The Effects of the polarization diversity of the Base Station in Indoor Environments Yuta Takagi (NTT DoCoMo), Kenji Osaki, Hideki Kawai (DoCoMo Technology), Ryo Yamaguchi, Shinji Uebayashi (NTT DoCoMo) |
In order to realize a communication by the minimum transmission power of mobile stations on indoor environments as medic... [more] |
AP2005-47 pp.57-62 |
AP, SAT (Joint) |
2005-07-20 16:40 |
Hokkaido |
Hotel Taisetsu |
A Study on Fast Estimation of the Electric Field in Indoor Environments Yuta Takagi, Ryo Yamaguchi, Shinji Uebayashi (NTT DoCoMo) |
We examine the fast estimation method of the electric field using the antenna system that arranges the cross polarizatio... [more] |
AP2005-48 pp.63-66 |
AP, SAT (Joint) |
2005-05-19 14:50 |
Tottori |
Tottori Univ. of Environmental Studies |
A study on high speed arithmetic of FDTD method using FPGA implementing Hidetoshi Suzuki, Yuta Takagi, Ryo Yamaguchi, Shinji Uebayashi (NTTDoCoMo Inc.) |
We have examined the FPGA (Field Programmable Gate Array) implementation of the FDTD algorithm to accelerate the electro... [more] |
AP2005-18 pp.51-56 |
RCS, AP, WBS, MW, MoNA |
2005-03-03 16:20 |
Kanagawa |
Yokosuka Research Park |
Study on the Diversity Reception of the Base Station on Indoor Environments Yuta Takagi, Ryo Yamaguchi, Shinji Uebayashi (NTT DoCoMo) |
In order to realize a communication by the minimum transmission power of mobile stations on indoor environments as medic... [more] |
WBS2004-121 AP2004-302 RCS2004-389 MoMuC2004-172 MW2004-299 pp.135-140 |
AP |
2005-01-20 13:00 |
Saga |
Saga University |
A study on accuracy of FDTD method using fixed-point arithmetic Hidetoshi Suzuki, Yuta Takagi, Ryo Yamaguchi, Shinji Uebayashi (NTTDoCoMo Inc.) |
Although FDTD method is used for electromagnetic field simulator extensively, it spends long time because it is calculat... [more] |
AP2004-202 pp.37-41 |