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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 28  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
AP, MW
(Joint)
2011-03-03
13:25
Ibaraki Ibaraki Univ. Reading Characteristics of 2.45GHz Band Passive RFID Tags Attached to a Large Metallic Plate form a Close Distance
Wataru Sudo, Shigeki Obote, Kenichi Kagoshima (Ibaraki Univ.) AP2010-180
In this paper, we have compared the characteristics of a circularly polarized antenna and linearly polarized antenna whe... [more] AP2010-180
pp.37-42
AP, MW
(Joint)
2011-03-03
13:50
Ibaraki Ibaraki Univ. An Array Antenna for MIMO Systems with a Decoupling Network Using Bridge Susceptances
Naoyuki Endo, Kenichi Kagoshima, Shigeki Obote, Atsuhiro Kagaya, Kazuki Nishimura (Ibaraki Univ.) AP2010-181
Decoupling/Matching Feed Network (DMFN) is one of the important equipment to improve ability of MIMO systems. Especially... [more] AP2010-181
pp.43-48
AP, MW
(Joint)
2011-03-03
15:20
Ibaraki Ibaraki Univ. Investigation on Radiation Power of a Wireless Power Transmission Device Employing Resonance between Antennas
Kaito Arita, Kenichi Kagoshima, Shigeki Obote (Ibaraki Univ.;) AP2010-184
Technology of wireless power transfer which use resonance between antennas has gathered attention since it has brought o... [more] AP2010-184
pp.61-66
AP, SAT
(Joint)
2010-07-23
10:00
Hokkaido Kitami Inst. Tech. Limitation of the performance of a small array antenna and its effective design technique for MIMO systems
Kenichi Kagoshima (Ibaraki Univ.), Atsuhiro Kagaya, Shigeki Obote (Ibaraki Univ) AP2010-61
Decoupling and matching characteristics of a perfect mesh feeding network have been investigated for an array antenna wi... [more] AP2010-61
pp.133-138
AP 2010-02-19
14:25
Tokyo Toshiba Frequency characteristic analysis of the efficiency of a MIMO array antenna with a matching circuit
Atsuhiro Kagaya, Kenichi Kagoshima, Shigeki Obote (Ibaraki Univ.) AP2009-200
In recent years, wireless communication is demanded high communication capacity due to increase of communication rate. M... [more] AP2009-200
pp.95-100
SIS 2009-12-17
13:00
Kyoto   Expansion of reading distance of passive RFID of 2.45GHz band using an existing metallic wire
Toru Suzuki, Shigeki Obote, Kenichi Kagoshima (Ibaraki Univ.) SIS2009-34
2.45GHz band RFID is communicated by the electromagnetic radiation. Therefore, the communication distance because short.... [more] SIS2009-34
pp.19-24
SIS 2009-12-17
13:20
Kyoto   Characteristics of a dead spot for 2.45GHz band passive RFID tags close to metallic plates
Jun Tei, Peng Wang, Shigeki Obote, Kenichi Kagoshima (Ibaraki Univ.) SIS2009-35
We have observed experimentally that dead spots occur when a 2.45GHz band RFID tag is placed in a vicinity of a metallic... [more] SIS2009-35
pp.25-30
RCS, AP
(Joint)
2009-11-27
11:15
Tokyo Tokyo Inst. of Tech. Analysis for Characteristic on 4 Ports MIMO Base Station using Polarization Antennas with Controled Beam Tilt
Hiromichi Teratake, Shigeki Obote, Kenichi Kagoshima (Ibaraki Univ.), Takayuki Shimizu, Shinsuke Murano (Hitachi Cable) AP2009-133
When existing 2 ports polarization diversity antenna was configured by arranging 2 ports antenna horizontally, we invest... [more] AP2009-133
pp.85-90
AP, SAT
(Joint)
2009-07-10
17:05
Hokkaido Otaru city, Hokkaido Decoupling and Matching Feeding Circuit for a Multi-beam Array Antenna Using a Bridge Susceptance
Kenichi Kagoshima, Shigeki Obote, Atsuhiro Kagaya (Ibaraki Univ.) AP2009-78
It is desired to realize high radiation efficiency and low correlation coefficient in order to achieve high system perfo... [more] AP2009-78
pp.201-206
AP 2009-06-11
14:50
Tokyo Kikai-Shinko-Kaikan Bldg. Study on an equivalent circuit for re-radiated power analysis of receiving antenna and an equivalent circuit of the transmitting antenna
Toru Suzuki, Kenichi Kagoshima, Shigeki Obote (Ibaraki Univ.), Yasuo Suzuki (Tokyo Univ. of Agr. and Tech.) AP2009-41
Transmission Antenna makes radiation field when it fed power from the center of antenna. At the same time, Receiving Ant... [more] AP2009-41
pp.25-29
AP 2009-06-11
15:10
Tokyo Kikai-Shinko-Kaikan Bldg. Study on efficiency and correlation coefficient of a diversity antenna with a matching circuit
Atsuhiro Kagaya, Kenichi Kagoshima, Shigeki Obote (Ibaraki Univ.) AP2009-42
An antenna array in a mobile terminal become large mutual coupling because of closely element space. So the antenna syst... [more] AP2009-42
pp.31-36
AP 2008-12-11
13:40
Tokyo Kikai-Shinko-Kaikan Bldg. Transmitting and receiving characteristics of an array antenna with a matched load and its application for MIMO systems
Kenichi Kagoshima, Shigeki Obote, Atsuhiro Kagaya (Ibaraki Univ.) AP2008-142
It is effective to employ matching circuits for array antennas with strong mutual coupling in MIMO or diversity applicat... [more] AP2008-142
pp.13-18
SIS 2008-12-04
13:10
Osaka Kansai Univ. A Study on Performance Improvement and Reading Technique of Small RFID Tags
Hiroyuki Koga, Peng Wang, Sho Yamada, Shigeki Obote, Kenichi Kagoshima (Ibaraki Univ.), Kenji Araki (Hitachi Ltd.)
 [more] SIS2008-48
pp.33-38
AP 2008-09-11
14:50
Kanagawa National Defense Academy Design of a matching feeding circuit for a MIMO antenna with mutual coupling
Kenichi Kagoshima (Ibaraki Univ.), Shigeki Obote (Ibaraki Univ) AP2008-85
 [more] AP2008-85
pp.61-66
AP 2008-06-19
14:00
Tokyo Kikai-Shinko-Kaikan Bldg. Study on a Transmitting Tapped Delay Line Adaptive Array Antenna
Shigeki Obote, Takayuki Tanou, Kenichi Kagoshima (Ibaraki Univ.) AP2008-31
A Tapped Delay Line Adaptive Array Antenna (TDL-AAA) is a spatial and temporal equalizer and this feature results in les... [more] AP2008-31
pp.11-16
AP 2008-03-14
10:10
Aichi Nanzan Univ. Design of array antennas with optimum directivity and arbitary null points
Hiromichi Teratake, Kenichi Kagoshima, Shigeki Obote (Ibaraki Univ.) AP2007-187
A design of array anntenas with optimum directivity has been proposed using matrix eigen value.
However , the design th... [more]
AP2007-187
pp.83-88
AP 2008-03-14
13:00
Aichi Nanzan Univ. A Consideration of Electromagnetic-wave Transmission in a Single Conductor
Yuuichi Shiraishi, Kenichi Kagoshima, Shigeki Obote (Ibaraki Univ.) AP2007-191
If challenge to build a sensor network in a factory, we come up with a wireless sensor network which is the easiest way ... [more] AP2007-191
pp.107-112
AP 2008-03-14
15:40
Aichi Nanzan Univ. Triple Frequency Wide band Microstrip Antennas With Ring Parasitic
Hiroya Tanaka, Kenichi Kagoshima, Shigeki Obote (Ibaraki Univ.) AP2007-197
In this report, it proposed the multi-band wideband antenna that was able to share three frequencies of frequency ratio... [more] AP2007-197
pp.141-146
AP 2007-12-13
14:25
Tokyo Kikai-Shinko-Kaikan Bldg. Bandwidth Enhancement of a Low-Profile Microstrip Antenna Electromagnetically Coupled with a Folded Inverted L-shaped Probe
Kazuki Ikeda, Kenichi Kagoshima, Shigeki Obote (Ibaraki Univ.) AP2007-118
It is known that a method of bandwidth enhancement for a microstrip antenna (MSA) electromagnetically coupled with an in... [more] AP2007-118
pp.19-24
SIS 2007-12-10
09:55
Hyogo   Study on characteristics of small RFID tags and its performance improvement
Peng Wang, Hideaki Yamauchi, Daijiro Araki, Sho Yamada, Shigeki Obote, Kenichi Kagoshima (Ibaraki Univ.), Kenji Araki (Hitachi Research Lab.) SIS2007-46
A small RFID tag consists of a antenna and IC-chip, and its size is several mm. Because antenna gain is very small and i... [more] SIS2007-46
pp.7-12
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