Masaharu TAKAHASHI


Small Antennas Used in the Vicinity of Human Body
Koichi ITO Masaharu TAKAHASHI Kazuyuki SAITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/01/01
Vol. E99-B  No. 1  pp. 9-18
Type of Manuscript:  INVITED PAPER (Special Section on Recent Progress in Antennas, Propagation and Wireless Systems Related to Topics in ISAP2014)
Category: Antennas and Propagation
Keyword: 
wearable antennaimplantable antennabody-centric wireless communicationsRFIDhyperthermiamedical devicehuman bodyphantom
 Summary | Full Text:PDF(3.4MB)

Variability of Specific Absorption Rate of Human Body for Various Configurations of Tablet Computer in Vicinity of Abdomen
Akihiro TATENO Tomoaki NAGAOKA Kazuyuki SAITO Soichi WATANABE Masaharu TAKAHASHI Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/07/01
Vol. E98-B  No. 7  pp. 1173-1181
Type of Manuscript:  Special Section PAPER (Special Section on Electromagnetic Compatibility Technology in Conjunction with Main Topics of EMC'14/Tokyo)
Category: 
Keyword: 
specific absorption rate (SAR)wireless radio terminalsnumerical models of humanfinite-difference time-domain (FDTD) method
 Summary | Full Text:PDF(4.2MB)

Specific Absorption Rates and Temperature Elevations due to Wireless Radio Terminals in Proximity to a Fetus at Gestational Ages of 13, 18, and 26 Weeks
Akihiro TATENO Shimpei AKIMOTO Tomoaki NAGAOKA Kazuyuki SAITO Soichi WATANABE Masaharu TAKAHASHI Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/10/01
Vol. E97-B  No. 10  pp. 2175-2183
Type of Manuscript:  PAPER
Category: Electromagnetic Compatibility(EMC)
Keyword: 
fetusspecific absorption rate (SAR)temperature elevationwireless radio terminalsfinite-difference time-domain (FDTD) method
 Summary | Full Text:PDF(3.8MB)

Magnetic Field Homogeneity of Birdcage Coil for 4T MRI System with No Lumped Circuit Elements
Ryotaro SUGA Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/04/01
Vol. E97-B  No. 4  pp. 791-797
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
magnetic resonance imaging (MRI)birdcage coilfinite-difference time-domain (FDTD) methodbiological tissue-equivalent phantom
 Summary | Full Text:PDF(2.2MB)

Design of Miniature Implantable Tag Antenna for Radio-Frequency Identification System at 2.45GHz and Received Power Analysis
HoYu LIN Masaharu TAKAHASHI Kazuyuki SAITO Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/01/01
Vol. E97-B  No. 1  pp. 129-136
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
RFIDin-body wireless communicationimplantable tag antennahuman body phantomreceived power
 Summary | Full Text:PDF(2.7MB)

Generation of Controllable Heating Patterns for Interstitial Microwave Hyperthermia by Coaxial-Dipole Antennas
Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/09/01
Vol. E96-C  No. 9  pp. 1178-1183
Type of Manuscript:  PAPER
Category: Electromagnetic Theory
Keyword: 
hyperthermiamicrowave heatinginternal heatingcontrollable heating patternarray applicator
 Summary | Full Text:PDF(1.4MB)

Development of RFID Antenna for Detection of Urination
Hiromasa NAKAJIMA Masaharu TAKAHASHI Kazuyuki SAITO Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/09/01
Vol. E96-B  No. 9  pp. 2244-2250
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
biological tissue-equivalent solid phantompaper diaperradio frequency identification (RFID)urinationfinite-difference time-domain (FDTD) method
 Summary | Full Text:PDF(2.7MB)

Small Multi-Band Antenna with Tuning Function for Body-Centric Wireless Communications
Chia-Hsien LIN Zhengyi LI Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/10/01
Vol. E95-B  No. 10  pp. 3074-3080
Type of Manuscript:  Special Section PAPER (Special Section on Medical Information Communication Technology for Disaster Recovery and Human Health Care Support)
Category: 
Keyword: 
body-centric wireless communications (BCWCs)planar inverted-F antenna (PIFA)industrial-scientific-medical (ISM)WiMAX
 Summary | Full Text:PDF(3.2MB)

Experimental Evaluation of SAR around an Implanted Cardiac Pacemaker Caused by Mobile Radio Terminal
Yuta ENDO Kazuyuki SAITO Soichi WATANABE Masaharu TAKAHASHI Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/06/01
Vol. E95-B  No. 6  pp. 2129-2132
Type of Manuscript:  LETTER
Category: Electromagnetic Compatibility(EMC)
Keyword: 
implanted cardiac pacemakerSARphantomFDTDPIFA
 Summary | Full Text:PDF(679.5KB)

Proper Derivation of Equivalent-Circuit Expressions of Intra-Body Communication Channels Using Quasi-Static Field
Nozomi HAGA Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/01/01
Vol. E95-B  No. 1  pp. 51-59
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2010)
Category: Antennas
Keyword: 
intra-body communicationsquasi-static approximationequivalent circuitboundary value problem
 Summary | Full Text:PDF(1.5MB)

Small Wearable Antenna with Folded Ground for Body-Centric Wireless Communications
Zhengyi LI Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/01/01
Vol. E95-B  No. 1  pp. 109-112
Type of Manuscript:  Special Section LETTER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2010)
Category: Antennas
Keyword: 
wearable antennafolded groundbody-centric wireless communicationsplanar inverted-F antenna
 Summary | Full Text:PDF(1.5MB)

Theoretical Estimation of Scattering Waves in Transverse Section of Upper Body for On-Body Wireless Communications
Changyong SEO Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/10/01
Vol. E93-B  No. 10  pp. 2601-2610
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Technologies in Antennas and Propagation in Conjunction with Main Topics of ISAP2009)
Category: Electromagnetic Analysis
Keyword: 
lossy-dielectric circular cylinderon-body wireless communicationsscattering waves
 Summary | Full Text:PDF(887KB)

Simple Switched-Beam Array Antenna System for Mobile Satellite Communications
BASARI M. Fauzan E. PURNOMO Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/12/01
Vol. E92-B  No. 12  pp. 3861-3868
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
antenna systemETS-VIIIsatellite-trackingmicrostrip patch array antennaoutdoor measurement
 Summary | Full Text:PDF(981.2KB)

Realization of Simple Antenna System Using ETS-VIII Satellite for Land Vehicle Communications
BASARI M. Fauzan E. PURNOMO Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/11/01
Vol. E92-B  No. 11  pp. 3375-3383
Type of Manuscript:  Special Section PAPER (Special Section on Satellite Communication Technologies in Conjunction with Main Topics of JC-SAT2008)
Category: 
Keyword: 
antenna systemland vehicle satellite communicationETS-VIIIsatellite-trackingfield experiment
 Summary | Full Text:PDF(1.5MB)

SAR Computation inside Fetus by RF Coil during MR Imaging Employing Realistic Numerical Pregnant Woman Model
Satoru KIKUCHI Kazuyuki SAITO Masaharu TAKAHASHI Koichi ITO Hiroo IKEHIRA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/02/01
Vol. E92-B  No. 2  pp. 431-439
Type of Manuscript:  Special Section PAPER (Special Section on Medical Information and Communications Technologies)
Category: 
Keyword: 
magnetic resonance imaging (MRI)birdcage coilpregnant womanfetusspecific absorption rate (SAR)
 Summary | Full Text:PDF(1.5MB)

A Circular Aperture Array Configuration with a Small Antenna Radius
Takanori NORO Yasuhiro KAZAMA Masaharu TAKAHASHI Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/09/01
Vol. E90-B  No. 9  pp. 2271-2279
Type of Manuscript:  Special Section PAPER (Special Section on 2006 International Symposium on Antennas and Propagation)
Category: Antennas
Keyword: 
array configurationuniform arrangementpatch antennas helical antennas
 Summary | Full Text:PDF(1.6MB)

Circularly Polarized Printed Antenna Combining Slots and Patch
Toshimitsu TANAKA Tamotsu HOUZEN Masaharu TAKAHASHI Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/03/01
Vol. E90-B  No. 3  pp. 621-629
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
dual-bandpatch antennaslot antennacircular polarizationelectromagnetically coupled microstrip line feed
 Summary | Full Text:PDF(1.4MB)

Simple Modeling of an Abdomen of Pregnant Women and Its Application to SAR Estimation
Hiroki KAWAI Koichi ITO Masaharu TAKAHASHI Kazuyuki SAITO Takuya UEDA Masayoshi SAITO Hisao ITO Hisao OSADA Yoshio KOYANAGI Koichi OGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/12/01
Vol. E89-B  No. 12  pp. 3401-3410
Type of Manuscript:  PAPER
Category: Electromagnetic Compatibility(EMC)
Keyword: 
fetuspregnant womenamniotic fluidSARFDTD method
 Summary | Full Text:PDF(1MB)

Circularly Polarized Rounded-Off Triangular Microstrip Line Array Antenna
David DELAUNE Josaphat Tetuko SRI SUMANTYO Masaharu TAKAHASHI Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/04/01
Vol. E89-B  No. 4  pp. 1372-1381
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
microstrip line antennacircular polarizationtriangular shaperounded vertexarray configurationbeam-switchingmobile satellite communications
 Summary | Full Text:PDF(1011KB)

Biological Tissue-Equivalent Agar-Based Solid Phantoms and SAR Estimation Using the Thermographic Method in the Range of 3-6 GHz
Teruo ONISHI Ryo ISHIDO Takuya TAKIMOTO Kazuyuki SAITO Shinji UEBAYASHI Masaharu TAKAHASHI Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/09/01
Vol. E88-B  No. 9  pp. 3733-3741
Type of Manuscript:  PAPER
Category: Electromagnetic Compatibility(EMC)
Keyword: 
solid phantombroadbandFDTD methodSARthermographic methodheat conduction equation
 Summary | Full Text:PDF(856.7KB)

Study on the Transmission Mechanism for Wearable Device Using the Human Body as a Transmission Channel
Katsuyuki FUJII Masaharu TAKAHASHI Koichi ITO Keisuke HACHISUKA Yusuke TERAUCHI Yoshinori KISHI Ken SASAKI Kiyoshi ITAO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/06/01
Vol. E88-B  No. 6  pp. 2401-2410
Type of Manuscript:  Special Section PAPER (Special Section on 2004 International Symposium on Antennas and Propagation)
Category: 
Keyword: 
personal area networkintra-body communicationhuman bodyphantomFDTD
 Summary | Full Text:PDF(2.7MB)

Data Compression by Context Sorting
Hidetoshi YOKOO Masaharu TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/05/25
Vol. E79-A  No. 5  pp. 681-686
Type of Manuscript:  PAPER
Category: Information Theory and Coding Theory
Keyword: 
data compressioncontext sortinguniversal codingrank coding
 Summary | Full Text:PDF(491.6KB)

Slot Design of a Concentric Array Radial Line Slot Antenna with Matching Slot Pairs
Masao UENO Seiji HOSONO Masaharu TAKAHASHI Kimio SAKURAI Makoto ANDO Naohisa GOTO Yasuhiko YOSHIDA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1996/01/25
Vol. E79-B  No. 1  pp. 70-76
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
antennasarrayRLSACA-RLSAmatching slot pair
 Summary | Full Text:PDF(672.6KB)

Enhancement of Band-Edge Gain in Radial Line Slot Antennas Using the Power Divider--A Wide-Band Radial Line Slot Antenna--
Tetsuya YAMAMOTO Masaharu TAKAHASHI Makoto ANDO Naohisa GOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1995/03/25
Vol. E78-B  No. 3  pp. 398-406
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
RLSAplanar antennahybrid structurepower dividerwide-bandwaveguidelong line effect
 Summary | Full Text:PDF(693.3KB)

An Analysis of the Rotational Symmetry of the Inner Field of Radial Line Slot Antennas
Masaharu TAKAHASHI Makoto ANDO Naohisa GOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1994/10/25
Vol. E77-B  No. 10  pp. 1256-1263
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
RLSAradial waveguideplanar antennamethod of momentrotational symmetryinner field
 Summary | Full Text:PDF(550.6KB)

Aperture Illumination Control in Radial Line Slot Antennas
Masaharu TAKAHASHI Jun-ichi TAKADA Makoto ANDO Naohisa GOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/07/25
Vol. E76-B  No. 7  pp. 777-783
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
RLSAplanar antennaBSwave-guide arrayradial wave-guide
 Summary | Full Text:PDF(570.9KB)