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Abstract
In recent years,
a study on body-centric communications
has become an active and attractive
area of research because of their
various applications such as e-healthcare,
support systems for specialized
occupations, monitoring systems
for elderly and handicapped people,
entertainment, and so on. Whereas
UHF bands are subjects of interest
especially in Europe and USA, HF
bands are of great interest especially
in Japan and Korea. Hence, all of
the prospective frequencies are
in an extremely wide range, and
an objective idea on how to select
a right frequency band for individual
applications is required. As for
the antennas, many types of wearable
(on-body) and implantable (in-body)
antennas have been reported, and
they should be as small as possible.
Currently in our laboratory, we
have been studying on frequency
dependence of basic characteristics
of simple wearable antennas as well
as body-centric wireless communication
channels in the range of HF to UHF
(3 MHz – 3 GHz). Also, we have been
investigating numerically and experimentally
thin implantable antennas in UHF
band.
In this presentation, firstly, electric
field distributions around the human
body wearing a small top-loaded
monopole antenna are numerically
calculated and compared in a wide
range of HF to UHF bands. Then,
received open voltages at receiving
antennas which are equipped at several
different points on the human body
are numerically investigated. The
received open voltages are also
numerically calculated and compared
with several different postures
of the human body. Finally, some
basic performances of miniaturized
thin implantable antennas are numerically
calculated in UHF band. Experimental
validation is also demonstrated.
About the speaker
Koichi
Ito was born in Nagoya,
Japan and received the B.S. and
M.S. degrees from Chiba University,
Chiba, Japan, in 1974 and 1976,
respectively, and the D.E. degree
from Tokyo Institute of Technology,
Tokyo, Japan, in 1985, all in electrical
engineering. From 1976 to 1979,
he was a Research Associate at the
Tokyo Institute of Technology. From
1979 to 1989, he was a Research
Associate at Chiba University. From
1989 to 1997, he was an Associate
Professor at the Department of Electrical
and Electronics Engineering, Chiba
University, and is currently a Professor
at the Department of Medical System
Engineering, Chiba University. From
2005 to 2009, he was Deputy Vice-President
for Research, Chiba University.
From 2008 to 2009, he was Vice-Dean
of the Graduate School of Engineering,
Chiba University. Since April 2009,
he has been appointed as Director
of Research Center for Frontier
Medical Engineering, Chiba University.
In 1989, 1994, and 1998, he visited
the University of Rennes I, France,
as an Invited Professor.
His main research interests include
analysis and design of printed antennas
and small antennas for mobile communications,
research on evaluation of the interaction
between electromagnetic fields and
the human body by use of numerical
and experimental phantoms, microwave
antennas for medical applications
such as cancer treatment, and antenna
systems for body-centric wireless
communications.
Professor Ito is a Fellow of the
IEEE, a Fellow of the IEICE and
a member of AAAS, the Bioelectromagnetics
Society (BEMS), the Institute of
Image Information and Television
Engineers of Japan (ITE) and the
Japanese Society for Thermal Medicine.
He served as Chair of the Technical
Group on Radio and Optical Transmissions,
ITE from 1997 to 2001, Chair of
the Technical Committee on Human
Phantoms for Electromagnetics, IEICE
from 1998 to 2006, Chair of the
IEEE AP-S Japan Chapter from 2001
to 2002, TPC Co-Chair of the 2006
IEEE International Workshop on Antenna
Technology (iWAT2006), Vice-Chair
of the 2007 International Symposium
on Antennas and Propagation (ISAP2007),
General Chair of iWAT2008, Co-Chair
of ISAP2008 and an AdCom member
for the IEEE AP-S from 2007 to 2009.
He currently serves as an Associate
Editor for the IEEE Transactions
on Antennas and Propagation, a Distinguished
Lecturer for the IEEE AP-S, and
Chair of the Technical Committee
on Antennas and Propagation, IEICE.
He has been appointed as General
Chair of ISAP2012 to be held in
Nagoya, Japan in 2012 and a member
of the Board of Directors, BEMS.
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