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IEICE Trans

Koichi HIRAYAMA

Permittivity Estimation Based on Transmission Coefficient for Gaussian Beam in Free-Space Method
Koichi HIRAYAMA Yoshiyuki YANAGIMOTO Jun-ichiro SUGISAKA Takashi YASUI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2023/06/01
Vol. E106-C  No. 6  pp. 335-343
Type of Manuscript:  PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
free-space method, permittivity estimation, Gaussian beam, finite-element method, 
 Summary | Full Text:PDF
Bending Loss Analysis of Chalcogenide Glass Channel Waveguides for Mid-Infrared Astrophotonic Devices
Takashi YASUI Jun-ichiro SUGISAKA Koichi HIRAYAMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2023/03/01
Vol. E106-C  No. 3  pp. 107-110
Type of Manuscript:  BRIEF PAPER
Category: Optoelectronics
Keyword: 
optical waveguides, mid-infrared spectral range, chalcogenide glass, astrophotonics, beam-propagation method, 
 Summary | Full Text:PDF
FOREWORD
Koichi HIRAYAMA Hiroyuki DEGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2022/04/01
Vol. E105-C  No. 4  pp. 126-127
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF
Single-Mode Condition of Chalcogenide Glass Channel Waveguides for Integrated Optical Devices Operated across the Astronomical N-Band
Takashi YASUI Jun-ichiro SUGISAKA Koichi HIRAYAMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2021/08/01
Vol. E104-C  No. 8  pp. 386-389
Type of Manuscript:  BRIEF PAPER
Category: Optoelectronics
Keyword: 
optical waveguides, mid-infrared spectral range, chalcogenide glass, astrophotonics, finite-element method, 
 Summary | Full Text:PDF
FOREWORD
Koichi HIRAYAMA Hiroyuki DEGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2021/04/01
Vol. E104-C  No. 4  pp. 132-133
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF
Reconstruction of Scatterer Shape from Relative Intensity of Scattered Field by Using Linearized Boundary Element Method
Jun-ichiro SUGISAKA Takashi YASUI Koichi HIRAYAMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2020/02/01
Vol. E103-C  No. 2  pp. 30-38
Type of Manuscript:  PAPER
Category: Electromagnetic Theory
Keyword: 
inverse scattering problem, boundary-integral equation, boundary element method, scattering theory, 
 Summary | Full Text:PDF
FOREWORD
Akira HIROSE Koichi HIRAYAMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2020/01/01
Vol. E103-C  No. 1  pp. 1-2
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF
Design of Compact Long-Wavelength-Pass Filter in Metal-Dielectric-Metal Plasmonic Waveguide with Stubs Using Transmission Line Model
Koichi HIRAYAMA Jun-ichiro SUGISAKA Takashi YASUI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2020/01/01
Vol. E103-C  No. 1  pp. 11-15
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
metal-dielectric-metal waveguide, long-wavelength-pass filter, low-pass prototype filter, transmission line model, 
 Summary | Full Text:PDF
FOREWORD
Akira HIROSE Koichi HIRAYAMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2019/01/01
Vol. E102-C  No. 1  pp. 1-2
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF
Efficient Analysis of Diffraction Grating with 10000 Random Grooves by Difference-Field Boundary Element Method
Jun-ichiro SUGISAKA Takashi YASUI Koichi HIRAYAMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2017/01/01
Vol. E100-C  No. 1  pp. 27-36
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Electromagnetic Theory and Its Application)
Category: 
Keyword: 
diffraction grating, random structure, numerical method, integral equation, boundary element method, 
 Summary | Full Text:PDF
Efficient Scattering Analysis of Arbitrarily Shaped Local Defect in Diffraction Grating
Jun-ichiro SUGISAKA Takashi YASUI Koichi HIRAYAMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/01/01
Vol. E99-C  No. 1  pp. 76-80
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
diffraction grating, boundary-element method, defect, scattering, numerical analysis, 
 Summary | Full Text:PDF
A Study on Optimization of Waveguide Dispersion Property Using Function Expansion Based Topology Optimization Method
Hiroyuki GOTO Yasuhide TSUJI Takashi YASUI Koichi HIRAYAMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/07/01
Vol. E97-C  No. 7  pp. 670-676
Type of Manuscript:  Special Section PAPER (Special Section on Recent Advances in Simulation Techniques and Their Applications for Electronics)
Category: 
Keyword: 
function expansion method, topology optimization, photonic crystal waveguide, slow-light, structural filter, 
 Summary | Full Text:PDF
Design Optimization of H-Plane Waveguide Component by Level Set Method
Koichi HIRAYAMA Yasuhide TSUJI Shintaro YAMASAKI Shinji NISHIWAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/05/01
Vol. E94-C  No. 5  pp. 874-881
Type of Manuscript:  PAPER
Category: Electromagnetic Theory
Keyword: 
design optimization, level set method, adjoint variable method, finite element method, H-plane waveguide component, 
 Summary | Full Text:PDF
Application of Topology Optimization to H-Plane Waveguide Component
Koichi HIRAYAMA Yasuhide TSUJI Tsuyoshi NOMURA Kazuo SATO Shinji NISHIWAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/02/01
Vol. E90-C  No. 2  pp. 282-287
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Electromagnetic Theory and Its Application)
Category: Numerical Techniques, Computational Electromagnetic
Keyword: 
topology optimization, adjoint variable method, finite element method, H-plane waveguide component, 
 Summary | Full Text:PDF
FEM-Based Electromagnetic Wave Simulator Running on Some Platforms by Use of Java and a Commercial Tool
Koichi HIRAYAMA Naoto KUNIEDA Yoshio HAYASHI Masanori KOSHIBA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/11/01
Vol. E86-C  No. 11  pp. 2191-2198
Type of Manuscript:  Special Section PAPER (Special Issue on Analytical and Simulation Methods for Electromagnetic Wave Problems)
Category: 
Keyword: 
electromagnetic wave simulator, FEM, Java, anisotropic PML, waveguide discontinuity, inverse problem, 
 Summary | Full Text:PDF
Microwave Simulator Based on the Finite-Element Method by Use of Commercial Tools
Koichi HIRAYAMA Yoshio HAYASHI Masanori KOSHIBA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2001/07/01
Vol. E84-C  No. 7  pp. 905-913
Type of Manuscript:  Special Section PAPER (Special Issue on Techniques for Constructing Microwave Simulators--Design and Analysis Tools for Electromagnetic Fields, Circuits, and Antennas--)
Category: Electromagnetics Simulation Techniques
Keyword: 
microwave simulator, FEM, 3-D analysis, waveguide discontinuity, eigenmode, 
 Summary | Full Text:PDF