Masahiro GESHIRO


4-Branch Power Splitters Designed by Ideal Field Method
Tetsuro YABU Masahiro GESHIRO Masaharu OHASHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2009/01/01
Vol. E92-C  No. 1  pp. 55-62
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Electromagnetic Theory and its Application)
Category: 
Keyword: 
optical waveguidefour-branchwaveguide designideal field method
 Summary | Full Text:PDF(635.4KB)

A Dual-Band Comb-Line Filter Using a Half-Wavelength Stripline Nesting a Quarter-Wavelength Coplanar Waveguide Resonator
Shoichi KITAZAWA Masahiro GESHIRO Kenta ISHIMARU Masaharu OHASHI Hideaki FUJIMOTO Kouji WADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/09/01
Vol. E90-B  No. 9  pp. 2439-2446
Type of Manuscript:  Special Section PAPER (Special Section on 2006 International Symposium on Antennas and Propagation)
Category: Electromagnetics
Keyword: 
dual bandband pass filterresonator
 Summary | Full Text:PDF(941.8KB)

A Multilayer Single-Input/Single-Output Dual-Band Filter Fabricated in a High Permittivity LTCC Substrate
Shoichi KITAZAWA Hideyuki MIYAKE Masahiro GESHIRO Masaharu OHASHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/04/01
Vol. E89-C  No. 4  pp. 509-516
Type of Manuscript:  Special Section PAPER (Special Section on Advanced RF Technologies for Compact Wireless Equipment and Mobile Phones)
Category: 
Keyword: 
dual bandband pass filtermatchingLTCC
 Summary | Full Text:PDF(803KB)

Tapered Velocity Couplers Composed of Nonlinear Waveguides for Limiting Optical Power
Toshiaki KITAMURA Tetsuro YABU Masahiro GESHIRO Shinji HARADA Shinnosuke SAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2001/04/01
Vol. E84-C  No. 4  pp. 421-426
Type of Manuscript:  PAPER
Category: Electromagnetic Theory
Keyword: 
tapered velocity couplernonlinear waveguideoptical power limiterfinite difference method
 Summary | Full Text:PDF(260.1KB)

Optical Logic OR-AND-NOT and NOR Gates in Waveguides Consisting of Nonlinear Material
Yono Hadi PRAMONO Masahiro GESHIRO Toshiaki KITAMURA Shinnosuke SAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2000/11/25
Vol. E83-C  No. 11  pp. 1755-1762
Type of Manuscript:  PAPER
Category: Optoelectronics
Keyword: 
nonlinear waveguideoptical logicfinite difference beam propagation method
 Summary | Full Text:PDF(1.2MB)

Self-Switching in Crossing Waveguides with Three Channels Consisting of Nonlinear Material
Yono Hadi PRAMONO Masahiro GESHIRO Toshiaki KITAMURA Shinnosuke SAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/01/25
Vol. E82-C  No. 1  pp. 111-118
Type of Manuscript:  PAPER
Category: Opto-Electronics
Keyword: 
nonlinear waveguideoptical switchfinite difference beam propagation method FD-BPM
 Summary | Full Text:PDF(793.1KB)

Characterization of Triplate Strip Resonators with a Loading Capacitor
Toshiaki KITAMURA Masahiro GESHIRO Toshio ISHIZAKI Tomoya MAEKAWA Shinnosuke SAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1998/12/25
Vol. E81-C  No. 12  pp. 1793-1799
Type of Manuscript:  Special Section PAPER (Special Issue on Computational Electromagnetics)
Category: 
Keyword: 
loading capacitorstrip resonatorfinite-difference time-domain method
 Summary | Full Text:PDF(592.9KB)

A Three-Waveguide Tapered-Velocity Coupler for Dividing Optical Power into Three Equal Parts
Masahiro GESHIRO Toshiaki KITAMURA Koji FUKUMURA Shinnosuke SAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1997/11/25
Vol. E80-C  No. 11  pp. 1414-1420
Type of Manuscript:  Special Section PAPER (Special Issue on Electromagnetic TheoryScattering and Diffraction)
Category: 
Keyword: 
tapered-velocity coupleradiabatic conditionoptical power dividerfinite difference beam propagation method
 Summary | Full Text:PDF(586KB)

Design Considerations on a Guided-Wave Polarization Splitter Utilizing a Bifurcating Waveguide in a Uniaxial Anisotropic Substrate
Toshiaki KITAMURA Masahiro GESHIRO Shinnosuke SAWA Hideatsu YAMANAKA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/10/25
Vol. E79-C  No. 10  pp. 1399-1404
Type of Manuscript:  Special Section PAPER (Special Issue on Electromagnetic Theory-Foundations and Applications)
Category: 
Keyword: 
polarization splitterbifurcating waveguideuniaxial anisotropyfinite difference beam propagation method
 Summary | Full Text:PDF(552.5KB)

A Two-Waveguide Tapered Velocity Coupler for a Variable Divider of Optical Power
Masahiro GESHIRO Toshiaki KITAMURA Tadashi YOSHIKAWA Shinnosuke SAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/04/25
Vol. E79-C  No. 4  pp. 587-592
Type of Manuscript:  PAPER
Category: Electromagnetic Theory
Keyword: 
optical power dividertapered velocity couplerLiNbO3 waveguideelectro-optic effectfinite difference beam propagation method
 Summary | Full Text:PDF(542.8KB)

Analysis of 3-Line Tapered Velocity Couplers with a Nonlinear Waveguide
Toshiaki KITAMURA Masahiro GESHIRO Shinnokuke SAWA Masato SASAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1995/10/25
Vol. E78-C  No. 10  pp. 1378-1382
Type of Manuscript:  Special Section PAPER (Special Issue on Electromagnetic Theory)
Category: 
Keyword: 
power limitertapered velocity couplernonlinear waveguidefinite difference method
 Summary | Full Text:PDF(433.1KB)

Low Loss Optical Waveguide Bends Consisting of Uniaxial Crystalline Material
Shinnosuke SAWA Toshiaki KITAMURA Masahiro GESHIRO Tadashi YOSHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1995/10/25
Vol. E78-C  No. 10  pp. 1373-1377
Type of Manuscript:  Special Section PAPER (Special Issue on Electromagnetic Theory)
Category: 
Keyword: 
low loss bendanisotropicoptical waveguidefinite difference method
 Summary | Full Text:PDF(429.4KB)

A Novel Optical Polarization Splitter Using a Dimensionally Tapered Velocity Coupler
Masashi HOTTA Masahiro GESHIRO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1994/11/25
Vol. E77-C  No. 11  pp. 1722-1725
Type of Manuscript:  Special Section PAPER (Special Issue on Electromagnetic Theory)
Category: 
Keyword: 
polarization splittertapered velocity couplerelectro-optic effectsLiNbO3finite difference method
 Summary | Full Text:PDF(347.7KB)

A Variable Optical Beam Splitter Utilizing a Tapered Velocity Coupler
Masahiro GESHIRO Masashi HOTTA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1994/11/25
Vol. E77-C  No. 11  pp. 1731-1734
Type of Manuscript:  Special Section PAPER (Special Issue on Electromagnetic Theory)
Category: 
Keyword: 
variable optical beam splittertapered velocity couplerelectro-optic effectLiNbO3finite difference method
 Summary | Full Text:PDF(360.6KB)

Analysis of Abrupt Discontinuities in Weakly Guiding Waveguides by a Modified Beam Propagation Method
Masashi HOTTA Masahiro GESHIRO Shinnosuke SAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/12/25
Vol. E76-B  No. 12  pp. 1552-1557
Type of Manuscript:  Special Section PAPER (Special Issue on 1992 Internatioal Symposium on Antennas and Propagation)
Category: 
Keyword: 
beam propagation methodreflectionwaveguide discontinuityoverlap integralweakly guiding structure
 Summary | Full Text:PDF(536.4KB)

Effects of Air Gaps on Butt-Joints between Isotropic and Anisotropic Planar Waveguides
Masashi HOTTA Masahiro GESHIRO Katsuaki KANOH Haruo KANETAKE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1993/08/25
Vol. E76-C  No. 8  pp. 1345-1349
Type of Manuscript:  PAPER
Category: Opto-Electronics
Keyword: 
butt-jointanisotropic waveguideair gapbeam propagation methodtransmission coefficient
 Summary | Full Text:PDF(403.6KB)

Application of Beam Propagation Method to Discontinuities of Weakly Guiding Structures
Masashi HOTTA Masahiro GESHIRO Shinnosuke SAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1993/08/25
Vol. E76-C  No. 8  pp. 1333-1338
Type of Manuscript:  PAPER
Category: Opto-Electronics
Keyword: 
beam propagation methodreflected wavewaveguide discontinuityoverlap integral
 Summary | Full Text:PDF(524.5KB)