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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 20件中 1~20件目  /   
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
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