Toshio NOJIMA


FEM Simulations of Implantable Cardiac Pacemaker EMI Triggered by HF-Band Wireless Power Transfer System
Naoki TANAKA Takashi HIKAGE Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/07/01
Vol. E99-C  No. 7  pp. 809-812
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
implantable cardiac pacemakerwireless power transferelectromagnetic interferencefinite element method (FEM)
 Summary | Full Text:PDF(1.4MB)

Experimental Investigation on RF Characteristics of Cryogenically-Cooled 3W-Class Receiver Amplifier Employing GaN HEMT with Blue Light LED for Mobile Base Stations
Yasunori SUZUKI Shoichi NARAHASHI Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/10/01
Vol. E97-C  No. 10  pp. 930-937
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-wave Technologies)
Category: 
Keyword: 
cryogenically-cooled amplifierGaN HEMTblue lightDCRFlight-emitting diodemobile base stationreceiver amplifier
 Summary | Full Text:PDF(1.7MB)

Dosimetric Assessment of Two-Layer Cell Culture Configurations for Fertility Research at 1950MHz
Yijian GONG Manuel MURBACH Teruo ONISHI Myles CAPSTICK Toshio NOJIMA Niels KUSTER 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/03/01
Vol. E97-B  No. 3  pp. 631-637
Type of Manuscript:  PAPER
Category: Electromagnetic Compatibility(EMC)
Keyword: 
dosimetrymultilayerSARRFwaveguide
 Summary | Full Text:PDF(3.2MB)

Low-Loss Matching Network Design for Band-Switchable Multi-Band Power Amplifier
Atsushi FUKUDA Takayuki FURUTA Hiroshi OKAZAKI Shoichi NARAHASHI Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/07/01
Vol. E95-C  No. 7  pp. 1172-1181
Type of Manuscript:  Special Section PAPER (Special Section on Recent Trends of Microwave Systems and Their Fundamental Technologies)
Category: 
Keyword: 
power amplifierreconfigurablematching networkmulti-bandswitch
 Summary | Full Text:PDF(3.2MB)

Basic Construction of Whole-Body Averaged SAR Estimation System Using Cylindrical-External Field Scanning for UHF Plane Wave Irradiation of Human Models
Yoshifumi KAWAMURA Takashi HIKAGE Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/10/01
Vol. E93-B  No. 10  pp. 2636-2643
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: 
cylindrical fields scanningwhole-body averaged SARhuman exposureFDTD techniqueMie scattering
 Summary | Full Text:PDF(1.7MB)

A Wideband Digital Predistorter for a Doherty Power Amplifier Using a Direct Learning Memory Effect Filter
Kenichi HORIGUCHI Naoko MATSUNAGA Kazuhisa YAMAUCHI Ryoji HAYASHI Moriyasu MIYAZAKI Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/07/01
Vol. E93-C  No. 7  pp. 975-982
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies)
Category: 
Keyword: 
predistortionadaptive filtermemory effectpower amplifierDoherty amplifier
 Summary | Full Text:PDF(2.2MB)

Estimation of EMI Impact by Cellular Radio on Implantable Cardiac Pacemakers in Elevator Using EMF Distributions Inside Human Body
Atsushi KITAGAWA Takashi HIKAGE Toshio NOJIMA Ally Y. SIMBA Soichi WATANABE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/07/01
Vol. E93-B  No. 7  pp. 1839-1846
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Electromagnetic Compatibility Technology in Conjunction with Main Topics of EMC'09/Kyoto)
Category: Biological Effects and Safety
Keyword: 
implantable cardiac pacemakerscellular radioselevatorfinite difference time domain methodnumerical phantom model
 Summary | Full Text:PDF(5.4MB)

Experimental Quasi-Microwave Whole-Body Averaged SAR Estimation Method Using Cylindrical-External Field Scanning
Yoshifumi KAWAMURA Takashi HIKAGE Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/07/01
Vol. E93-B  No. 7  pp. 1826-1833
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Electromagnetic Compatibility Technology in Conjunction with Main Topics of EMC'09/Kyoto)
Category: Biological Effects and Safety
Keyword: 
whole-body averaged SARfield measurementscaled modelmobile phone frequencyplane-wave exposure system
 Summary | Full Text:PDF(8.8MB)

Plane-Wave and Vector-Rotation Approximation Technique for Reducing Computational Complexity to Simulate MIMO Propagation Channel Using Ray-Tracing
Wataru YAMADA Naoki KITA Takatoshi SUGIYAMA Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/12/01
Vol. E92-B  No. 12  pp. 3850-3860
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
MIMO propagation channel prediction techniqueray-tracing methodimaging algorithmsubstitution technique
 Summary | Full Text:PDF(1.6MB)

Using Large-Scale FDTD Method to Obtain Precise Numerical Estimation of Indoor Wireless Local Area Network Office Environment
Louis-Ray HARRIS Takashi HIKAGE Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/09/01
Vol. E92-A  No. 9  pp. 2177-2183
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: Wireless LAN System
Keyword: 
finite-difference-time-domain (FDTD) methodwireless local area network (WLAN)indoor propagationhistogramhuman absorption
 Summary | Full Text:PDF(1.3MB)

Precise Estimation of Cellular Radio Electromagnetic Field in Elevators and EMI Impact on Implantable Cardiac Pacemakers
Louis-Ray HARRIS Takashi HIKAGE Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2009/09/01
Vol. E92-C  No. 9  pp. 1182-1187
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies and Their Applications)
Category: 
Keyword: 
cellular radioelevatorimplantable cardiac pacemakerelectromagnetic interferencefinite-difference-time-domain method
 Summary | Full Text:PDF(1.6MB)

A New Signaling Architecture THREP with Autonomous Radio-Link Control for Wireless Communications Systems
Masahiko HIRONO Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2009/09/01
Vol. E92-C  No. 9  pp. 1163-1169
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies and Their Applications)
Category: 
Keyword: 
indoor propagationhand-overindoor wireless communicationautonomous radio-link controlsignaling architecture
 Summary | Full Text:PDF(570KB)

A Novel Filter Construction Utilizing HTS Reaction-Type Filter to Improve Adjacent Channel Leakage Power Ratio of Mobile Communication Systems
Shunichi FUTATSUMORI Takashi HIKAGE Toshio NOJIMA Akihiko AKASEGAWA Teru NAKANISHI Kazunori YAMANAKA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2009/03/01
Vol. E92-C  No. 3  pp. 307-314
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Superconducting Analog Devices and Their Applications)
Category: Microwaves
Keyword: 
adjacent channel leakage power ratiohigh-temperature superconductorintermodulation distortionpower handling capabilityreaction-type filter
 Summary | Full Text:PDF(645.4KB)

Leaf-Shaped Element Bowtie Antenna with Flat Reflector for UWB Applications
Michitaka AMEYA Manabu YAMAMOTO Toshio NOJIMA Kiyohiko ITOH 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/09/01
Vol. E90-B  No. 9  pp. 2230-2238
Type of Manuscript:  Special Section PAPER (Special Section on 2006 International Symposium on Antennas and Propagation)
Category: Antennas
Keyword: 
UWBbowtie-antennaunidirectional radiationwaveform distortioncross-correlation
 Summary | Full Text:PDF(3.1MB)

The Test Phantom for the Cochlear Implant to Estimate EMI from Cellular Phone
Yoshiaki TARUSAWA Kohjiroh OHSHITA Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/08/01
Vol. E88-B  No. 8  pp. 3275-3280
Type of Manuscript:  Special Section PAPER (Special Section of 2004 International Symposium on Electromagnetic Compatibility)
Category: Biological Effects
Keyword: 
cochlear implantcellular phoneEMIphantom
 Summary | Full Text:PDF(1.5MB)

Electric-Field Distribution Estimation in a Train Carriage due to Cellular Radios in order to Assess the Implantable Cardiac Pacemaker EMI in Semi-Echoic Environments
Takashi HIKAGE Toshio NOJIMA Soichi WATANABE Takashi SHINOZUKA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/08/01
Vol. E88-B  No. 8  pp. 3281-3286
Type of Manuscript:  Special Section PAPER (Special Section of 2004 International Symposium on Electromagnetic Compatibility)
Category: Biological Effects
Keyword: 
EMCEMIimplantable cardiac pacemakercellular radioFDTDtrain carriage
 Summary | Full Text:PDF(1MB)

Image NRD Guide-Fed Dielectric Rod Antenna for Millimeter-Wave Applications
Ally Yahaya SIMBA Manabu YAMAMOTO Toshio NOJIMA Kiyohiko ITOH 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/09/01
Vol. E87-C  No. 9  pp. 1405-1411
Type of Manuscript:  Special Section PAPER (Special Section on Wave Technologies for Wireless and Optical Communications)
Category: Antennas, Circuits and Receivers
Keyword: 
dielectric rod antennaimage NRD guidemillimeter-wavetransitionFDTD
 Summary | Full Text:PDF(902KB)

Advanced RF Technologies and Future Requirements for Mobile Communication Base Stations
Nobuo NAKAJIMA Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/12/01
Vol. E85-C  No. 12  pp. 1950-1958
Type of Manuscript:  INVITED PAPER (Special Issue on Low-Distortion,High-Power,High-Efficiency Active Device and Circuit Technology)
Category: 
Keyword: 
mobile communicationamplifierbase stationcellular
 Summary | Full Text:PDF(1.3MB)

A Low-Loss 5 GHz Bandpass Filter Using HTS Quarter-Wavelength Coplanar Waveguide Resonators
Hideyuki SUZUKI Zhewang MA Yoshio KOBAYASHI Kei SATOH Shoichi NARAHASHI Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/03/01
Vol. E85-C  No. 3  pp. 714-719
Type of Manuscript:  Special Section PAPER (Special Issue on Superconductive Electronics)
Category: Microwave Devices and Systems
Keyword: 
superconductorcoplanar waveguidequarter-wavelength resonatorband-pass filtermicrowave
 Summary | Full Text:PDF(739.2KB)

Multi-Grid FDTD Calculation of Electromagnetic Absorption in the Human Head for 5 GHz Band Portable Terminals
Jianqing WANG Hideaki SEKO Osamu FUJIWARA Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/11/01
Vol. E84-B  No. 11  pp. 3033-3040
Type of Manuscript:  PAPER
Category: Electromagnetic Compatibility(EMC)
Keyword: 
multi-grid FDTDelectromagnetic absorptionportable terminalanatomically realistic head model
 Summary | Full Text:PDF(563.1KB)

2-GHz Band Cryogenic Receiver Front End for Mobile Communication Base Station Systems
Toshio NOJIMA Shoichi NARAHASHI Tetsuya MIMURA Kei SATOH Yasunori SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/08/25
Vol. E83-B  No. 8  pp. 1834-1843
Type of Manuscript:  Special Section PAPER (Special Issue on Personal, Indoor and Mobile Radio Communications)
Category: 
Keyword: 
radio base station equipmentcryogenic receiver front endsuperconducting filterlow noise amplifiermobile communication
 Summary | Full Text:PDF(687.3KB)

Nonlinear Compensation Technologies for Microwave Power Amplifiers in Radio Communication Systems
Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/05/25
Vol. E82-C  No. 5  pp. 679-686
Type of Manuscript:  Special Section PAPER (Special Issue on Low Distortion Technology for Microwave Devices and Circuits)
Category: 
Keyword: 
linearizerpredistortionfeed-forwardmicrowaveradio communicationmobile communication
 Summary | Full Text:PDF(2.3MB)

FOREWORD
Yoji NAGASAWA Kunio SAWAYA Yoshio KAMI Kohji KOSHIJI Youji KOTSUKA Takashi SHINOZUKA Masao TAKI Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1997/05/25
Vol. E80-B  No. 5  pp. 643-644
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(195.6KB)

FDTD Analysis of Electromagnetic Interaction between Portable Telephone and Human Head
Masao TAKI So-ichi WATANABE Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/10/25
Vol. E79-C  No. 10  pp. 1300-1307
Type of Manuscript:  INVITED PAPER (Special Issue on Electromagnetic Theory-Foundations and Applications)
Category: 
Keyword: 
near-field exposurebiological effectspecific absorption rateFDTD methodcellular telephone
 Summary | Full Text:PDF(919KB)

Noise Reduction Device Using Novel Automatic Wavelength-Offset Control for Highly Stable Optical-Microwave Transmission Systems
Toshiyuki FUTAKATA Yoshiaki TARUSAWA Yasushi ITO Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/05/25
Vol. E79-C  No. 5  pp. 657-663
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave Devices for Mobile Communications)
Category: Active Devices
Keyword: 
optical-microwave transmissionbeat noisemobile radio communication
 Summary | Full Text:PDF(506.4KB)

Developments in Mobile/Portable Telephones and Key Devices for Miniaturization
Shuuji URABE Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/05/25
Vol. E79-C  No. 5  pp. 600-605
Type of Manuscript:  INVITED PAPER (Special Issue on Microwave Devices for Mobile Communications)
Category: 
Keyword: 
mobile telephoneportable telephonemicrowave devicesJapanese cellular systemradio unit design
 Summary | Full Text:PDF(452.9KB)

FOREWORD
Yoshio KOBAYASHI Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/05/25
Vol. E79-C  No. 5  pp. 599-599
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(121KB)

Estimation of Electric Field Intensity in the Fresnel Region of Colinear Array Antennas
Takehiko KOBAYASHI Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1994/06/25
Vol. E77-B  No. 6  pp. 749-753
Type of Manuscript:  Special Section PAPER (Special Issue on Biological Effects of Electromagnetic Fields)
Category: 
Keyword: 
near fieldcolinear array antennanear field measurementradiofrequency safety
 Summary | Full Text:PDF(352.3KB)

An Experimental SAR Estimation of Human Head Exposure to UHF Near Fields Using Dry-Phantom Models and a Thermograph
Toshio NOJIMA Sadayuki NISHIKI Takehiko KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1994/06/25
Vol. E77-B  No. 6  pp. 708-713
Type of Manuscript:  INVITED PAPER (Special Issue on Biological Effects of Electromagnetic Fields)
Category: 
Keyword: 
SARportable radiodry phantomradio-frequency exposurethermograph
 Summary | Full Text:PDF(794.7KB)

High Efficiency Transmitting Power Amplifiers for Portable Radio Units
Toshio NOJIMA Sadayuki NISHIKI Kohji CHIBA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1991/06/25
Vol. E74-B  No. 6  pp. 1563-1570
Type of Manuscript:  INVITED PAPER (Special Issue on Mobile Communications)
Category: 
Keyword: 
 Summary | Full Text:PDF(630.3KB)