Yoshihiro KOKUBO


Frequency-Dependent Rectangular TE30-to-TE10 Mode Converter
Yoshihiro KOKUBO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/11/01
Vol. E94-C  No. 11  pp. 1794-1797
Type of Manuscript:  BRIEF PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
waveguidescylindrical arraysscattering parametersmode converter
 Summary | Full Text:PDF(695.8KB)

Fabrication of Wide Band Metallic Bend Waveguide with Asymmetric In-Line Dielectric Rods
Yoshihiro KOKUBO Tadashi KAWAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2009/12/01
Vol. E92-C  No. 12  pp. 1538-1540
Type of Manuscript:  BRIEF PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
dielectric rodscylindrical arraysingle modeasymmetrywaveguide
 Summary | Full Text:PDF(412.7KB)

Rectangular TE30 to TE10 Mode Converter
Yoshihiro KOKUBO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2009/08/01
Vol. E92-C  No. 8  pp. 1087-1090
Type of Manuscript:  BRIEF PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
waveguidescylindrical arraysscattering parametersmode converter
 Summary | Full Text:PDF(426.9KB)

Wide Band Metallic Waveguide with Asymmetric In-Line Dielectric Rods
Yoshihiro KOKUBO Tadashi KAWAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/12/01
Vol. E91-C  No. 12  pp. 1966-1968
Type of Manuscript:  LETTER
Category: Microwaves, Millimeter-Waves
Keyword: 
dielectric rodscylindrical arraysingle modeasymmetry
 Summary | Full Text:PDF(309.7KB)

Dual-Band Wilkinson Power Dividers Using a Series RLC Circuit
Tadashi KAWAI Yasuaki NAKASHIMA Yoshihiro KOKUBO Isao OHTA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/11/01
Vol. E91-C  No. 11  pp. 1793-1797
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-wave Technologies)
Category: 
Keyword: 
microwave passive componentsdual-bandpower dividerWilkinson power divider
 Summary | Full Text:PDF(526KB)

Parallel Coupled Microstrip Couplers Compensated with Periodic Floating-Conductors on Coupled Edges
Takao FUJII Isao OHTA Tadashi KAWAI Yoshihiro KOKUBO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/05/01
Vol. E91-C  No. 5  pp. 780-787
Type of Manuscript:  PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
artificial coupled-linedirectional couplersmicrostrip couplersparallel coupled linesperiodically loading
 Summary | Full Text:PDF(1.8MB)

Miniature Broad-Band CPW 3-dB Branch-Line Couplers in Slow-Wave Structure
Takao FUJII Isao OHTA Tadashi KAWAI Yoshihiro KOKUBO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/12/01
Vol. E90-C  No. 12  pp. 2245-2253
Type of Manuscript:  Special Section PAPER (Special Section on Recent Technologies for Microwave and Millimeter-wave Passive Devices)
Category: 
Keyword: 
coplanar waveguidesdirectional couplershybridsequivalent admittancemicrowave circuitsslow-wave structure
 Summary | Full Text:PDF(1.7MB)

Economic Setup for a Dual-Band Metallic Waveguide with Dual In-Line Dielectric Rods
Yoshihiro KOKUBO Sotaro YOSHIDA Tadashi KAWAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/12/01
Vol. E90-C  No. 12  pp. 2261-2262
Type of Manuscript:  Special Section LETTER (Special Section on Recent Technologies for Microwave and Millimeter-wave Passive Devices)
Category: 
Keyword: 
bend waveguidecylindrical arraydielectric rodeconomy
 Summary | Full Text:PDF(161.6KB)

A Novel 180-Degree 3 dB Hybrid Using a Cylindrical Cavity
Mitsuyoshi KISHIHARA Tadashi KAWAI Yoshihiro KOKUBO Isao OHTA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/07/25
Vol. E82-C  No. 7  pp. 1148-1153
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
Category: Passive Devices and Circuits
Keyword: 
waveguidewaveguide componentE-plane planar circuithybrid
 Summary | Full Text:PDF(1.1MB)

A Power-Combining system of Four Oscillators Using an Eight-Port Hybrid
Isao OHTA Tadashi KAWAI Yoshihiro KOKUBO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/10/25
Vol. E79-C  No. 10  pp. 1449-1454
Type of Manuscript:  PAPER
Category: Microwave and Millimeter Wave Technology
Keyword: 
microwavemicrowave oscillatorpower combiningparallel runningmutual synchronization
 Summary | Full Text:PDF(489.4KB)