Hiroshi SHIRAI


A New Interpretation of Physical Optics Approximation from Surface Equivalence Theorem
Hieu Ngoc QUANG Hiroshi SHIRAI 
Publication:   
Publication Date: 2018/08/01
Vol. E101-C  No. 8  pp. 664-670
Type of Manuscript:  PAPER
Category: Electromagnetic Theory
Keyword: 
surface equivalence theoremphysical opticsPOgeometrical opticswedge diffraction
 Summary | Full Text:PDF(400.8KB)

Theoretical Limit of the Radiation Efficiency for Electrically Small Self-Resonant Spherical Surface Antennas
Keisuke FUJITA Hiroshi SHIRAI 
Publication:   
Publication Date: 2017/01/01
Vol. E100-C  No. 1  pp. 20-26
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Electromagnetic Theory and Its Application)
Category: 
Keyword: 
electrically small antennasspherical helix antennasspherical wave expansionself-resonant antennas
 Summary | Full Text:PDF(908.4KB)

A Free Space Permittivity Measurement at Microwave Frequencies for Solid Materials
An Ngoc NGUYEN Hiroshi SHIRAI 
Publication:   
Publication Date: 2017/01/01
Vol. E100-C  No. 1  pp. 52-59
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Electromagnetic Theory and Its Application)
Category: 
Keyword: 
kirchhoff approximationdielectric cuboidsfree space methodpermittivity measurement
 Summary | Full Text:PDF(1.5MB)

New Estimation Method for the Operational Low Frequency End of Antipodal Vivaldi Antennas
Hien Ba CHU Hiroshi SHIRAI Chien Dao NGOC 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/08/01
Vol. E99-C  No. 8  pp. 947-955
Type of Manuscript:  PAPER
Category: Electromagnetic Theory
Keyword: 
tapered slot antennasantipodal Vivaldi antennasultra wideband
 Summary | Full Text:PDF(2.1MB)

Electromagnetic Scattering Analysis from Rectangular Dielectric Cuboids - TE Polarization -
An Ngoc NGUYEN Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/01/01
Vol. E99-C  No. 1  pp. 11-17
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Electromagnetic Theory and Its Application)
Category: 
Keyword: 
Kirchhoff approximationequivalent currentbackscatteringdielectric cuboids
 Summary | Full Text:PDF(2.3MB)

Electromagnetic Plane Wave Diffraction by Loaded N-Slits on Thick Conducting Screen
Ryoichi SATO Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/01/01
Vol. E99-C  No. 1  pp. 72-75
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
Kobayashi potentialWeber-Schafheitlin discontinuous integralsperiodic structure with finite extentmultiple scattering by slits
 Summary | Full Text:PDF(266.3KB)

FOREWORD
Motoyuki SATO Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/01/01
Vol. E99-C  No. 1  pp. 1-2
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(104.5KB)

FOREWORD
Hiroshi SHIRAI Motoyuki SATO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/01/01
Vol. E98-C  No. 1  pp. 1-1
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(250.3KB)

Theoretical Limitation of the Radiation Efficiency for Homogenous Electrically Small Antennas
Keisuke FUJITA Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/01/01
Vol. E98-C  No. 1  pp. 2-7
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Electromagnetic Theory and Its Application)
Category: 
Keyword: 
electrically small antennaradiation efficiencyspherical wave functions
 Summary | Full Text:PDF(647.1KB)

FOREWORD
Masahiko NISHIMOTO Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/01/01
Vol. E97-C  No. 1  pp. 1-2
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(281.2KB)

FOREWORD
Masahiko NISHIMOTO Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/01/01
Vol. E96-C  No. 1  pp. 1-2
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(280.8KB)

A Delta-Sigma Modulator Using a Non-uniform Quantizer Adjusted for the Probability Density of Input Signals
Toru KITAYABU Mao HAGIWARA Hiroyasu ISHIKAWA Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/07/01
Vol. E95-B  No. 7  pp. 2257-2265
Type of Manuscript:  PAPER
Category: Fundamental Theories for Communications
Keyword: 
delta-sigma modulatornon-uniform quantizerquantization noise
 Summary | Full Text:PDF(2.3MB)

High Frequency Ray-Mode Coupling Analysis of Plane Wave Diffraction by a Wide and Thick Slit on a Conducting Screen
Hiroshi SHIRAI Ryoichi SATO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/01/01
Vol. E95-C  No. 1  pp. 10-15
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Electromagnetic Theory and Its Application)
Category: Scattering and Diffraction
Keyword: 
ray-mode couplingdiffractionGTDthick slit
 Summary | Full Text:PDF(610.4KB)

Modification of Ray-Launching Method for Accurate 2D Indoor Propagation Analysis
Ryoichi SATO Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/01/01
Vol. E94-C  No. 1  pp. 55-58
Type of Manuscript:  BRIEF PAPER
Category: Radiation and Propagation
Keyword: 
ray-launching methodshooting and bouncing rayscollective raymultiple reflectionsBrewster's angleindoor propagation
 Summary | Full Text:PDF(215.5KB)

Efficient Ray-Launching Method For 2D Indoor Propagation Analysis
Ryoichi SATO Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2009/01/01
Vol. E92-C  No. 1  pp. 40-45
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Electromagnetic Theory and its Application)
Category: 
Keyword: 
ray-launching methodshooting and bouncing rayscollective raycomplex refraction anglemultiple reflectionsindoor propagation
 Summary | Full Text:PDF(351.4KB)

Empirical Investigation of the LOS Propagation Characteristics on an Undulating Road for Millimeter Wave Inter-Vehicle Communication
Atsushi YAMAMOTO Koichi OGAWA Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/09/01
Vol. E90-C  No. 9  pp. 1807-1815
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: Antennas/Systems
Keyword: 
ITSinter-vehicle communicationsLOSroad undulation
 Summary | Full Text:PDF(1.1MB)

Cyclic Shifted-and-Extended Codes Based on a Quasi-Orthogonal Sequence for a CDM Transmission Scheme
Kazuyuki SHIMEZAWA Hiroshi HARADA Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/11/01
Vol. E89-B  No. 11  pp. 2998-3007
Type of Manuscript:  PAPER
Category: Transmission Systems and Transmission Equipment for Communications
Keyword: 
zero cross-correlationQuasi-Orthogonal sequenceRake combiningcyclic shifted-and-extended codescode division multiplexing
 Summary | Full Text:PDF(619.8KB)

Reconstruction of Polygonal Cylindrical Targets with Curved Surfaces from Their Monostatic RCS
Hiroshi SHIRAI Yoshinori HIRAMATSU Masashi SUZUKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/12/01
Vol. E88-C  No. 12  pp. 2289-2294
Type of Manuscript:  Special Section PAPER (Special Section on Wireless Technologies and Computational Electromagnetics)
Category: Imaging
Keyword: 
monostatic RCSradar cross sectionGTDinverse scatteringequivalent source method
 Summary | Full Text:PDF(718.6KB)

A New Sampling Frequency Selection Scheme in Undersampling Systems
Yoshio KUNISAWA Naohiro SAHARA Hiroshi SHIRAI Hisato IWAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/11/01
Vol. E88-B  No. 11  pp. 4170-4175
Type of Manuscript:  Special Section PAPER (Special Section on Software Defined Radio Technology and Its Applications)
Category: 
Keyword: 
software defined radioundersamplingsampling frequencyRF sampling
 Summary | Full Text:PDF(539.3KB)

A New Iterative MoM/FDTD Formulation for Simulating Human Exposure to Electromagnetic Waves
Shoji MOCHIZUKI Soichi WATANABE Masao TAKI Yukio YAMANAKA Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/09/01
Vol. E87-C  No. 9  pp. 1540-1547
Type of Manuscript:  Special Section PAPER (Special Section on Wave Technologies for Wireless and Optical Communications)
Category: Basic Electromagnetic Analysis
Keyword: 
SARiteration procedurenumerical hybrid methodFDTD methodMethod of Moments
 Summary | Full Text:PDF(1MB)

A New CDM Transmission Scheme with Cyclic Shifted-and- Extended Codes and a Cancellation Technique for Accumulated Cross-Correlation Values
Kazuyuki SHIMEZAWA Hiroshi HARADA Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/08/01
Vol. E87-B  No. 8  pp. 2212-2221
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
cross-correlation cancellationcyclic shifted-and-extended codescode division multiplexingmobile radio communication
 Summary | Full Text:PDF(1.3MB)

Electromagnetic Scattering Analysis for Crack Depth Estimation
Hidenori SEKIGUCHI Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/11/01
Vol. E86-C  No. 11  pp. 2224-2229
Type of Manuscript:  Special Section PAPER (Special Issue on Analytical and Simulation Methods for Electromagnetic Wave Problems)
Category: 
Keyword: 
crack depth estimationradar cross sectionRCStime domain gating processdip frequency
 Summary | Full Text:PDF(718KB)

A Proposal of Overfill CDM Transmission Scheme for Future Road-Vehicle Communication Systems
Kazuyuki SHIMEZAWA Hiroshi HARADA Hiroshi SHIRAI Masayuki FUJISE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/01/01
Vol. E86-B  No. 1  pp. 68-78
Type of Manuscript:  Special Section PAPER (Special Issue on Multiple Access and Signal Transmission Techniques for Future Mobile Communications)
Category: 
Keyword: 
code division multiplexingDSRC systemITSoverfill CDM transmission scheme
 Summary | Full Text:PDF(732.8KB)

An Adaptive Symbol Timing Synchronization Method for Multi-Mode & Multi-Service Software Radio Communications System
Ryo SAWAI Hiroshi HARADA Hiroshi SHIRAI Masayuki FUJISE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/07/01
Vol. E84-B  No. 7  pp. 1885-1896
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
software radiosymbol timingsynchronizationITS
 Summary | Full Text:PDF(1.1MB)

Applicability of Impedance Boundary Condition for Approximating a Loaded Trough on a Ground Plane
Ryoichi SATO Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2001/01/01
Vol. E84-C  No. 1  pp. 123-125
Type of Manuscript:  LETTER
Category: Electromagnetic Theory
Keyword: 
impedance boundary conditionSIBCKobayashi and Nomura's methodrectangular trough
 Summary | Full Text:PDF(238.9KB)

GTD Analysis for Evanescent Modal Excitation
Hiroshi SHIRAI Yoshiyasu MATSUDA Ryoichi SATO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1997/01/25
Vol. E80-C  No. 1  pp. 190-192
Type of Manuscript:  LETTER
Category: Electromagnetic Theory
Keyword: 
GTDgeometrical theory of diffractionevanescent modeparallel plane waveguidemodal excitation
 Summary | Full Text:PDF(200.2KB)

Electromagnetic Plane Wave Scattering by a Loaded Trough on a Ground Plane
Ryoichi SATO Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1994/12/25
Vol. E77-C  No. 12  pp. 1983-1989
Type of Manuscript:  PAPER
Category: Electromagnetic Theory
Keyword: 
Weber-Schafheitlin's discontinuous integralsplane wave scatteringtrough
 Summary | Full Text:PDF(481.8KB)

Ray Mode Coupling Analysis of Plane Wave Scattering by a Trough
Hiroshi SHIRAI Kazuhiro HIRAYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/12/25
Vol. E76-B  No. 12  pp. 1558-1563
Type of Manuscript:  Special Section PAPER (Special Issue on 1992 Internatioal Symposium on Antennas and Propagation)
Category: 
Keyword: 
plane wave scatteringtroughGTDray-mode coupling
 Summary | Full Text:PDF(480.6KB) | (Errata)

Analysis of Time Transient EM Field Response from a Dielectric Spherical Cavity
Hiroshi SHIRAI Eiji NAKANO Mikio YANO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1992/05/25
Vol. E75-C  No. 5  pp. 627-634
Type of Manuscript:  PAPER
Category: Electromagnetic Theory
Keyword: 
transient analysisdielectric spheresingularity expansion methodwavefront expansion methodFFT
 Summary | Full Text:PDF(589.5KB)

Transient Response by a Dielectric Cylinder due to a Line Source at the Center
Hiroshi SHIRAI Akiomi HAMAKOSHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1991/01/25
Vol. E74-C  No. 1  pp. 157-166
Type of Manuscript:  PAPER
Category: Electromagnetic Theory
Keyword: 
 Summary | Full Text:PDF(655.8KB)

Diffraction of Cylindrical Wave by Smooth and Polygonal Cylinders
Hiroshi SHIRAI Kohei HONGO Hirokazu KOBAYASHI 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1983/02/25
Vol. E66-E  No. 2  pp. 116-123
Type of Manuscript:  PAPER
Category: Antenna and Propagation
Keyword: 
 Summary | Full Text:PDF(511.2KB)