Committee |
Date Time |
Place |
Paper Title / Authors |
Abstract |
Paper # |
AP |
2018-10-19 14:00 |
Okayama |
Okayama Univ. |
Performance evaluation of a two element FMCW radar using a virtual array antenna extension method Nobuyuki Takaya, Shigeki Takeda, Masahiro Umehira, Kenichi Kagoshima (Ibaraki Univ.), Hiroshi Kuroda (HiAMS Ltd) AP2018-98 |
[more] |
AP2018-98 pp.53-58 |
AP |
2016-05-20 13:50 |
Hyogo |
kobe Univ. |
A study on identification characteristics of UHF band dipole tags in books for library management systems Tomoki Ichikawa, Shigeki Takeda, Kenichi Kagoshima, Masahiro Umehira (Ibaraki Univ.) AP2016-26 |
[more] |
AP2016-26 pp.55-60 |
AP |
2016-02-19 13:20 |
Fukushima |
Iwaki (Spa Resort Hawaiians) |
A Triple Frequency Capacity Loaded Loop Antenna Using Electromagnetic Coupling Feed Uchida Mitsuki, Kenichi Kagoshima, Shigeki Takeda, Masahiro Umehira (Ibaraki Univ.) AP2015-199 |
The frequencies of 400M/900M/1.2G/2.4G/5.0GHz are considered for wireless sensor used for the network of home electric a... [more] |
AP2015-199 pp.47-52 |
MW, AP (Joint) |
2015-09-18 09:30 |
Tochigi |
Oyama National College of Tech. |
A design methodology for a wideband phase shifter utilizing cascaded M-shaped dielectrics Sumihiro Sato, Shigeki Takeda, Kenichi Kagoshima, Masahiro Umehira (Ibaraki Univ.) AP2015-85 |
[more] |
AP2015-85 pp.31-36 |
AP, SANE (Joint) |
2015-08-28 09:55 |
Ibaraki |
Ibaragi Univ. Mito Campus |
A 60GHz WLAN coverage detection method for fast session transfer from microwave to millimeter wave by using a downward directed directional antenna Tomoaki Kashihara, Hiroki Masuda, Shigeki Takeda, Kenichi Kagoshima, Masahiro Umehira (Ibaraki Univ.) AP2015-68 |
To solve the congestion of communication at microwave band, FST (fast session transfer) has been devised. While FST is a... [more] |
AP2015-68 pp.43-48 |
AP, SANE (Joint) |
2015-08-28 10:55 |
Ibaraki |
Ibaragi Univ. Mito Campus |
Utilization of radiation pattern measurement of an embedded dipole antenna in an object for complex permittivity estimation of the medium Hironori Watanabe, Shigeki Takeda, Kenichi Kagoshima, Masahiro Umehira (Ibaraki Univ.) AP2015-70 |
Embedding of a wireless sensor to various objects will be assumed in a UHF (Ultra High Frequency) band from now on. Ther... [more] |
AP2015-70 pp.55-60 |
SRW |
2014-12-17 13:00 |
Kanagawa |
Keio University |
[Invited Talk]
A small multi-band antenna for wireless sensor networks Kenichi Kagoshima, Shigeki Takeda, Masahiro Umehira (Ibaraki Univ.) SRW2014-35 |
Wireless sensor networks, which are sometimes called “M2M”or “IoT”, have been growing as the fundamental system in the s... [more] |
SRW2014-35 pp.1-6 |
AP, RCS (Joint) |
2014-11-13 10:50 |
Yamagata |
Yamagata University, Yonezawa Campus |
A calculation model of shadowing loss caused by a moving human body and its validation by experiments Ting Wang, Masahiro Umehira, Shigeki Takeda, Teruyuki Miyajima, Kenichi Kagoshima (Ibaraki Univ) RCS2014-211 |
As link quality is affected by shadowing of a moving human body in 60GHz band. we need a countermeasure technique such a... [more] |
RCS2014-211 pp.85-90 |
AP, RCS (Joint) |
2014-11-13 13:40 |
Yamagata |
Yamagata University, Yonezawa Campus |
[Invited Talk]
Research and Development of Multi-band Multi-mode Wireless Systems for Higher Frequency Bands Utilization Masahiro Umehira, Shigeki Takeda, Teruyuki Miyajima, Kenichi Kagoshima (Ibaraki Univ.), Yuji Kuwahara, Yasutaka Uramoto (Panasonic) AP2014-142 RCS2014-213 |
[more] |
AP2014-142 RCS2014-213 p.79(AP), p.97(RCS) |
AP, SAT (Joint) |
2014-07-24 15:00 |
Gifu |
Gero Citizen Hall |
Design methodology for the wideband dielectric phase shifter utilizing a cascaded M-shaped structure Takuma Yoshimura, Shigeki Takeda, Kenichi Kagoshima, Masahiro Umehira (Ibaraki Univ.) AP2014-56 |
In base stations of mobile communication, variable phase shifters are used to tilt a radiation pattern in the vertical p... [more] |
AP2014-56 pp.47-52 |
AP, SAT (Joint) |
2014-07-25 09:30 |
Gifu |
Gero Citizen Hall |
An inverted L-shaped probe fed horizontally polarized omni-directional antenna for relay nodes of 4G mobile communication systems Takayuki Suzuki, Takayuki Shimizu, Shigeki Takeda, Kenichi Kagoshima, Masahiro Umehira (Ibaraki Univ.) AP2014-59 |
For high speed mobile communication, a study on LTE-Advanced is being discussed. The increase of communication speed aro... [more] |
AP2014-59 pp.61-66 |
RCS |
2014-06-17 14:20 |
Okinawa |
Okinawa-ken Seinenkaikan (Naha) |
Considerations on signal processing for 60GHz band WLAN service area discovery using diversity techniques Sho Wada, Masahiro Umehira, Shigeki Takeda, Teruyuki Miyajima, Kenichi Kagoshima (Ibaraki Univ.) RCS2014-48 |
A multi band frequency cooperative wireless systems, which utilizes microwave band (2.4/5GHz) WLAN in combination with m... [more] |
RCS2014-48 pp.93-98 |
RCS, SR, SRW (Joint) |
2014-03-04 09:15 |
Tokyo |
Waseda Univ. |
Experimental investigation of shadowing characteristics due to human body in 60GHz band WLAN Ting Wang, Tomofumi Ono, Masahiro Umehira, Shigeki Takeda, Teruyuki Miyajima, Kenichi Kagoshima (Ibaraki Univ) SRW2013-45 |
Received signal power is drastically faded due to severe shadowing by human in 60GHz WLAN(Wireless LAN) and throughput p... [more] |
SRW2013-45 pp.7-11 |
RCS, SR, SRW (Joint) |
2014-03-04 09:40 |
Tokyo |
Waseda Univ. |
Diversity techniques to improve millimeter-wave WLAN service area prediction accuracy by using microwave signals Sho Wada, Masahiro Umehira, Shigeki Takeda, Teruyuki Miyajima, Kenichi Kagoshima (Ibaraki Univ.) SRW2013-46 |
Millimeter wave (60GHz) WLAN has been drawing attention to achieve multi-Gbps ultra-high-speed transmission. However, th... [more] |
SRW2013-46 pp.13-18 |
RCS, SR, SRW (Joint) |
2014-03-04 10:05 |
Tokyo |
Waseda Univ. |
A Study on Microwave/Millimeter-Wave Frequency Cooperative ARQ System Shohei Koike, Teruyuki Miyajima, Masahiro Umehira, Shigeki Takeda, Kenichi Kagoshima (Ibaraki Univ.) SRW2013-47 |
In this paper, we consider multi-Gbps millimeter wave wireless LAN systems where shadowing causes serious performance d... [more] |
SRW2013-47 pp.19-24 |
RCS, SIP |
2014-01-24 16:05 |
Fukuoka |
Kyushu Univ. |
Temporal and frequency characteristics of shadowing by human body in 60GHz WLAN Tomofumi Ono, Masahiro Umehira, Shigeki Takeda, Teruyuki Miyajima, Kenichi Kagoshima (Ibaraki Univ.) SIP2013-127 RCS2013-297 |
Moving human body causes significant shadowing resulting in a large propagation loss in 60GHz band ultra-high-speed mult... [more] |
SIP2013-127 RCS2013-297 pp.247-252 |
SRW |
2013-12-16 13:00 |
Tokyo |
Kikai-Shinko-Kaikan Bldg |
Application of space diversity for millimeter wave WLAN service areaprediction by using microwave signals in multiband frequency cooperative wireless systems Gen Saito, Sho Wada, Masahiro Umehira, Shigeki Takeda, Teruyuki Miyajima, Kenichi Kagoshima (Ibaraki Univ.) SRW2013-38 |
Milimeter(60GHz) band WLAN enables multi-Gbps transmission since 9GHz bandwidth is available for unlicensed use in 60GHz... [more] |
SRW2013-38 pp.1-6 |
RCS |
2013-10-17 15:30 |
Tokyo |
Sophia Univ. |
[Invited Lecture]
Multi-band Frequency Cooperative Wireless Systems for Ultra-high Capacity Wireless Networks Masahiro Umehira, Shigeki Takeda, Teruyuki Miyajima, Kenichi Kagoshima (Ibaraki Univ.) RCS2013-154 |
The number of wireless users such as cellular phone and wireless LAN is continuing to increase all over the world includ... [more] |
RCS2013-154 pp.65-71 |
SRW |
2013-06-17 13:00 |
Kanagawa |
Fujitsu |
Dynamic Shadowing characteristics of by Human Body based on Ray-tracing Simulations in Millimeter-wave WLAN Tomofumi Ono, Masahiro Umehira, Shigeki Takeda, Teruyuki Miyajima, Kenichi Kagoshima (Ibaraki Univ.) SRW2013-15 |
In the ultra-high-speed millimeter wave band WLAN supporting several Gbps class transmission speed, as large diffraction... [more] |
SRW2013-15 pp.19-24 |
SRW |
2013-06-17 13:25 |
Kanagawa |
Fujitsu |
Service Area Estimation of Millimeter Wave WLAN by Using Microwave WLAN Signals for Frequency Cooperative Wireless Systems Sho Wada, Masahiro Umehira, Shigeki Takeda, Teruyuki Miyajima, Kenichi Kagoshima (Ibaraki Univ.) SRW2013-16 |
Standardization of multi-Gbit/s class WLAN using 60GHz band has been completed and its product development is underway. ... [more] |
SRW2013-16 pp.25-30 |