IEICE Trans

Isao OHTA

Design and Fabrication of PTFE Substrate Integrated Waveguide Coupler by SR Direct Etching Mitsuyoshi KISHIHARA Masaya TAKEUCHI Akinobu YAMAGUCHI Yuichi UTSUMI Isao OHTA
Publication: Publication Date: 2021/09/01 Vol. E104-C No. 9 pp. 446-454 Type of Manuscript: PAPER Category: Microwaves, Millimeter-Waves Keyword: microstructure, X-ray lithography, dielectric loaded waveguides, couplers, millimeter wave circuits,
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Improvement of Isolation Characteristics of Multi-Way Power Divider Using TE₁₀-TE_p0 Mode Transducer Mitsuyoshi KISHIHARA Isao OHTA
Publication: Publication Date: 2018/10/01 Vol. E101-C No. 10 pp. 831-835 Type of Manuscript: BRIEF PAPER Category: Microwaves, Millimeter-Waves Keyword: microwave, mode transducer, power divider/combiner, H-plane waveguide,
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Fabrication of Integrated PTFE-Filled Waveguide Butler Matrix for Short Millimeter-Wave by SR Direct Etching Mitsuyoshi KISHIHARA Masaya TAKEUCHI Akinobu YAMAGUCHI Yuichi UTSUMI Isao OHTA
Publication: Publication Date: 2018/06/01 Vol. E101-C No. 6 pp. 416-422 Type of Manuscript: PAPER Category: Microwaves, Millimeter-Waves Keyword: microstructure, X-ray lithography, dielectric loaded waveguides, Butler matrix, millimeter wave circuits,
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Left-Handed Waveguide Using Cutoff TM-Mode Mitsuyoshi KISHIHARA Yuki MIZUTANI Isao OHTA Kensuke OKUBO Hironori TAKIMOTO
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2016/01/01 Vol. E99-C No. 1 pp. 61-67 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Electromagnetic Theory and Its Application) Category: Keyword: circular waveguides, EBG devices, electromagnetic propagation, rectangular waveguides,
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Parallel Ring-Line Rat-Race Circuit with Very Loose Coupling Utilizing Composite Right-/Left-Handed Transmission Lines Tadashi KAWAI Yuma SUMITOMO Akira ENOKIHARA Isao OHTA Kei SATOH Yasunori SUZUKI Hiroshi OKAZAKI Shoichi NARAHASHI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2014/10/01 Vol. E97-C No. 10 pp. 965-971 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-wave Technologies) Category: Keyword: microwave passive components, rat-race circuit, loose coupling, CRLH-TL, wideband,
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Design and Fabrication of PTFE-Filled Waveguide Components by SR Direct Etching Mitsuyoshi KISHIHARA Hiroaki IKEUCHI Yuichi UTSUMI Tadashi KAWAI Isao OHTA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2012/01/01 Vol. E95-C No. 1 pp. 122-129 Type of Manuscript: PAPER Category: Microwaves, Millimeter-Waves Keyword: X-ray lithography, bandpass filters, directional couplers, sputtering, dielectric materials,
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Design of an H-Plane Waveguide Intersection with High Isolation Hiroaki IKEUCHI Tadashi KAWAI Mitsuyoshi KISHIHARA Isao OHTA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2011/10/01 Vol. E94-C No. 10 pp. 1572-1578 Type of Manuscript: Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology) Category: Passive Devices and Circuits Keyword: microwave, waveguide circuit, waveguide intersection, crossover, SIW,
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Design of a Broadband Cruciform Substrate Integrated Waveguide Coupler Mitsuyoshi KISHIHARA Isao OHTA Kensuke OKUBO
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2011/02/01 Vol. E94-C No. 2 pp. 248-250 Type of Manuscript: LETTER Category: Microwaves, Millimeter-Waves Keyword: millimeter-wave technology, passive components, couplers, substrate-integrated waveguide (SIW), planar circuit approach,
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Shielded Structure of Composite Right/Left-Handed Transmission Line Using Substrate Integrated Waveguide and Floating-Conductor Kensuke OKUBO Mitsuyoshi KISHIHARA Akifumi IKEDA Jiro YAMAKITA Isao OHTA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2010/07/01 Vol. E93-C No. 7 pp. 1055-1062 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies) Category: Keyword: composite right/left-handed transmission line (CRLH-TL), substrate integrated waveguide (SIW), SIW-type CRLH, floating-conductor, shielded structure, periodic structure,
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Band-Broadening Design Technique of CRLH-TLs Dual-Band Branch-Line Couplers Using CRLH-TLs Matching Networks Tadashi KAWAI Miku NAKAMURA Isao OHTA Akira ENOKIHARA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2010/07/01 Vol. E93-C No. 7 pp. 1072-1077 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies) Category: Keyword: branch-line coupler, matching network, CRLH-TL, dual-band, equivalent admittance approach, size reduction,
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Analysis of Post-Wall Waveguide Based on H-Plane Planar Circuit Approach Mitsuyoshi KISHIHARA Isao OHTA Kensuke OKUBO Jiro YAMAKITA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2009/01/01 Vol. E92-C No. 1 pp. 63-71 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Electromagnetic Theory and its Application) Category: Keyword: parallel-plate waveguides, substrate integrated waveguide (SIW), waveguide discontinuities, passive circuits,
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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 components, dual-band, power divider, Wilkinson power divider,
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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-line, directional couplers, microstrip couplers, parallel coupled lines, periodically loading,
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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 waveguides, directional couplers, hybrids, equivalent admittance, microwave circuits, slow-wave structure,
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Cruciform Directional Couplers in E-Plane Rectangular Waveguide Mitsuyoshi KISHIHARA Isao OHTA Kuniyoshi YAMANE
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2007/09/01 Vol. E90-C No. 9 pp. 1743-1748 Type of Manuscript: Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology) Category: Passive Devices/Circuits Keyword: microwave devices, directional couplers, rectangular waveguides, design automation, genetic algorithms,
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Multi-Stage, Multi-Way Microstrip Power Dividers with Broadband Properties Mitsuyoshi KISHIHARA Isao OHTA Kuniyoshi YAMANE
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2006/05/01 Vol. E89-C No. 5 pp. 622-629 Type of Manuscript: PAPER Category: Microwaves, Millimeter-Waves Keyword: design automation, microstrip components, multiport circuits, power dividers, Chebyshev transformers,
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Broadband Multi-Way Microstrip Power Dividers Mitsuyoshi KISHIHARA Kuniyoshi YAMANE Isao OHTA Tadashi KAWAI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2005/01/01 Vol. E88-C No. 1 pp. 20-27 Type of Manuscript: Special Section PAPER (Special Section on Recent Trends of Microwave and Millimeter-Wave Passive Circuit Components and Technologies for Improvement of Characteristics) Category: Keyword: power dividers, microstrip components, multiport circuits, Chebyshev transformers, design automation,
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Design of Quadrature Hybrids and Directional Couplers Based on the Equivalent Admittance Approach Isao OHTA Tadashi KAWAI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2005/01/01 Vol. E88-C No. 1 pp. 2-14 Type of Manuscript: INVITED PAPER (Special Section on Recent Trends of Microwave and Millimeter-Wave Passive Circuit Components and Technologies for Improvement of Characteristics) Category: Keyword: microwave passive component, directional coupler, hybrid, microwave integrated circuit, equivalent admittance approach,
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Asymmetrical Coupled-HNRD-Guide Directional Couplers with Flat Coupling Mitsuyoshi KISHIHARA Isao OHTA Tadashi KAWAI Kuniyoshi YAMANE
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2003/02/01 Vol. E86-C No. 2 pp. 126-133 Type of Manuscript: Special Section PAPER (Special Issue on Circuit and Device Technology for High-Speed Wireless Communication) Category: Passive (Coupler) Keyword: NRD guide, transverse resonance technique, directional coupler, millimeter wave, coupled-line,
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A New Wide-Band and Reduced-Size Hybrid Ring Tadashi KAWAI Isao OHTA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2003/02/01 Vol. E86-C No. 2 pp. 134-138 Type of Manuscript: Special Section PAPER (Special Issue on Circuit and Device Technology for High-Speed Wireless Communication) Category: Passive (Coupler) Keyword: hybrid ring, equivalent admittance, uniplanar circuit, phase inverter, broadband,
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Analysis and Design of Integrated Structures of (H)NRD Guide and E-Plane Waveguide Based on Transverse Resonance Technique Mitsuyoshi KISHIHARA Isao OHTA Kuniyoshi YAMANE
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2001/10/01 Vol. E84-C No. 10 pp. 1561-1568 Type of Manuscript: Special Section PAPER (Special Issue on Millimeter-Wave Circuits and Fabrication Technologies Opening up the 21st Century) Category: Keyword: NRD guide, transverse resonance technique, transition, directional coupler, millimeter wave,
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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: waveguide, waveguide component, E-plane planar circuit, hybrid,
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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: microwave, microwave oscillator, power combining, parallel running, mutual synchronization,
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A Rat-Race-Type Directional Coupler for Loose Coupling Isao OHTA Hiroshi TANIGUCHI Takenori KANEKO
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1988/04/25 Vol. E71-E No. 4 pp. 304-306 Type of Manuscript: Special Section LETTER (Special Issue: Papers from 1988 Spring Convention IEICE) Category: Electromagnetic Theory and Microwave Circuits Keyword:
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Optimum Ports Arrangement for a Planar-Circuit-Type 3 dB Hybrid Isao OHTA Toshiyuki YAMASHITA Ichiro HAGINO
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1984/05/25 Vol. E67-E No. 5 pp. 287-288 Type of Manuscript: LETTER Category: Microwaves and Millimeter Waves Keyword:
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Noise Analysis of Mutually but Asymmetrically Synchronized Oscillators Isao OHTA Kiyoshi FUKUI
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1976/04/25 Vol. E59-E No. 4 pp. 9-10 Type of Manuscript: LETTER Category: Circuits and Systems Keyword:
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