Isao Ohta

(太田勲)

Profile Information

Affiliation: University Headquarters, University of Hyogo

Degree: PhD (Engineering)(Osaka University)
(BLANK)

J-GLOBAL ID: 200901006736377442
researchmap Member ID: 1000057703

Research Interests

Research Areas

Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Communication and network engineering /
Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Electronic devices and equipment /

Committee Memberships

Misc.

平面回路法に基づく導波管E面不連続の解析(共著)

電子情報通信学会論文誌, J83-C(1) 45-52, 2000
Analysis of E-Plane Discontinuities in Rectangular Waveguide Based on Planar-Circuit Approach

Trans. IEICE (C), J83-C(1) 45-52, 2000
A novel 180-degree 3 dB hybrid using a cylindrical cavity

M Kishihara, T Kawai, Y Kokubo, Ohta, I

IEICE TRANSACTIONS ON ELECTRONICS, E82C(7) 1148-1153, Jul, 1999
Analysis and Design of Radial Waveguide E-Plane Hybrids (共著)

1999 Asia-Pacific Microwave Conference Proceeding, 2 500-503, 1999
A Novel 180゜3dB Hybrid Using a Cylindrical Cavity

KISHIHARA M.

1998 Asia-Pacific Microwave Conference Proceedings, 2 685-688, 1998
Analysis of Waveguide E-Plane Discontinuities and Components Based on Planar-Circuit Approach

KISHIHARA M.

1998 IEEE MTT-S International Microwave Symposium Digest, 2 913-916, 1998
電磁波回路のSパラメタによる表現とその基本特性

427-436, 1997
結晶界面が混晶化した多重量子障壁による電子の反射率の計算

電子情報通信学会論文誌(C-(]G0001[)), J80-C-(]G0001[)(11) 534-535, 1997
2次元三角格子に新たな円柱を付加したフォトニックバンド構造

電子情報通信学会論文誌, J80-C-I 86-87, 1997
A design of microstrip-disk-type directional couplers

T Kawai, T Fukumoto, Y Kokubo, Ohta, I, JP Hsu

1997 ASIA-PACIFIC MICROWAVE CONFERENCE PROCEEDINGS, VOLS I-III, 1145-1148, 1997
A design of lumped-element 3dB quadrature hybrids

Ohta, I, XP Li, T Kawai, Y Kokubo

1997 ASIA-PACIFIC MICROWAVE CONFERENCE PROCEEDINGS, VOLS I-III, 1141-1144, 1997
S-Parameter Representation of an Electromagnetic Wave Circuit and Its Basic Properties

MWE'97 Microwave Workshop Digest, 427-436, 1997
Calculation of Electron Reflectivity for Graded Multiquantum Barrier

Trans. IEICE(C-(]G0001[)), J80-C-(]G0001[)(11) 534-535, 1997
A Design Method of Directional Couplers with Twofold Symmetry and Its Application to Lumped-Element 3dB Quadrature Hybrids

6th International Symposium on Recent Advances in Microwave Technology Proceedings, 277-280, 1997
Cavity-type directional couplers with simple structure

T Kawai, M Kishihara, Y Kokubo, Ohta, I

1997 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS I-III, 2 413-416, 1997
Two-Dimensional Photonic Band Structure of Triangular Lattice with Additional Cylinders

IEICE Trans. C-I, J80-C-I 86-87, 1997
Refractive Index as a Function of Photon Energy for AlGaAs between 1.2 and 1.8 eV

J. Appl. Phys., 81(4) 2042-2043, 1997
Design of Micostrip Rectangular Disk Quadrature 3dB Hybrids

Progress in Electromagnetics Research Symp. Proc., 60, 1997
A power-combining system of four oscillators using an eight-port hybrid

Ohta, I, T Kawai, Y Kokubo

IEICE TRANSACTIONS ON ELECTRONICS, E79C(10) 1449-1454, Oct, 1996
2重対称方向性結合器の設計法

電子情報通信学会論文誌, J79-C-I 484-486, 1996
A Design Method of Directional Couplers of Twofold Symmetrical Structure

IEICE Trans. C-I, J79-C-I 484-486, 1996
Design of Waveguide-Type 3-dB Quadrature Hybrids Based on E-Plane Planar Circuit Approach

1996 Asia-Pacific Microwave Conference Proc., 3(C9・1) 947-950, 1996
SPICEを用いた半導体レーザの多モードレート方程式の解析

姫路工業大学部研究報告, 48(.1-8), 1995
電子のエンベロープ関数の最適化を図った多重量子井戸LDの設計

電子情報通信学会論文誌 C-(]G0001[), J78-C-(]G0001[), 1995
Planar-Circuit-Type diectional Couplers with an Arbitrary Power Split Ratio

1995 Asia -Pacific Microwave Conference Proceedings, 1(S02) 32-35, 1995
Rectangular disk directional couplers with a relatively tight coupling

Tadashi Kawai, Yoshihiro Kokubo, Isao Ohta

1995 25th European Microwave Conference, 2 717-721, 1995
An Analysis of Multi-Mode Rate Equations for Laser Diodes Using SPICE

Isozaki Seishi, Kokubo Yoshihiro, Ohta Isao

Reports of The Faculty of Engineeing, Himeji Institute of Technology, 48(.1-8) 1-8, 1995
Designing of a Multiquantum-Well Laser Diode with Attempt to optimize Envelope Function of Electron

The transactions of the Institute of Electronics , Imformation and Communication Engineers C-(]G0001[), J78-C-(]G0001[), 1995
PLANAR-CIRCUIT-TYPE 3-DB QUADRATURE HYBRIDS

T KAWAI, OHTA, I

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 42(12) 2462-2467, Dec, 1994
分岐線路形8開口ハイブリッド回路

電子情報通信学会論文誌, J77-C-I(2) 71-80, 1994
Square Shaped 3dB Hybrids on Two-Dimensional Dipole Modes

1994 Asia-Pacific Microwave Conference Proceedings, 2 395-398, 1994
A Branch-Line-Type Eight-Port Hybrid Circuit

KAWAI Tadashi, IIO Ken'ichi, OHTA Isao

Trans. IEICE, J77-C-I(2) 71-80, 1994
4方向切り替え運転が可能な4発振器電力合成運転系

電子情報通信学会技術研究報告, 93(374) 63-70, 1993
時分割多重化縦続構成によるスイッチトキャパシタバイカッドフィルタを用いた音声合成装置の試作

姫路工業大学工学部研究報告, 46,16-28, 1993
一般化された任意電力分配ラットレース回路

電子情報通信学会論文誌(C-I), J77-C-I(4) 89-98, 1993
Four-Way Switchable Power Combining System of Four Oscillators

Ohta Isao, Kawai Tadashi, Matsutani Yoko

Technical Report of IEICE, 93(374) 63-70, 1993

This paper treats a four-way switchable power-combining system, in which four oscillators and four variable reflectors(loads)are equally coupled to one another through an eight-port hybrid.Output powers of the four oscillators can be combined distinguishably into an arbitrary port of the four passive ports(without oscillators)- by properly adjusting the circuit parameters connected to the ports.Experimental corroboration is presented also.
A Prototype of Speech Synthesizer using Time Division Multiplexed Cascade Constitution of Switched-Capacitor Biguad Filters

Reports of The Faculty of Engineering Himeji Institute of Technology, 46,16-28, 1993
A Power Combining System of Four Oscillators Capable of Four-Way Switching

1993 Asia-Pacific Microwave Conference Proceedings, 1,7,38-41, 1993
A Novel Parallel Running System of Four Oscillators Coupled through an Eight-Port Hybrid

1993 IEEE MTT-S International Microwave Symposium Digest, 1,317-320, 1993
Generalized Rat-Race Circuit with an Arbitrary Power-Split Ratio

OHTA Isao, KAWAI Tadashi

Trans. IEICE(C-I), J77-C-I(4) 89-98, 1993
A Transmission-Line-Type Eight-Port Hybrid

1992 IEEE MTT-S International Microwave Symposium Digest, 1992
A Branch-Line-Type Eight-Port Comparator Circuit

1991 IEEE MTT-S International Microwave Symposium Digest, 1991
PRINTED-CIRCUIT RAT-RACE-TYPE DIRECTIONAL-COUPLERS FOR LARGER POWER-SPLIT RATIO

OHTA, I, HAGINO, I, T KANEKO

INTERNATIONAL JOURNAL OF INFRARED AND MILLIMETER WAVES, 10(6) 729-735, Jun, 1989
Rectangular Disk 3-dB Hybrids

1989 IEEE MTT-S Int'1 Symposium Digest, 1989
Parallel Running System of Three Oscillators Coupled through a Six-Port Magic Junction

IEEE Trans. on Microwave Theory and Tech., 37(11) 1699-1707, 1989
A New Six-Port Microwave Network : Six-Port Magic Junction

IEEE Trans. on Microwave Theory and Tech., 36(5) 859-864, 1988
円形平面回路形3dBハイブリッドの特性改善

電子情報通信学会論文誌(C), 70-C(3), 1987
Improved Circular Disk 3-dB Hybrids

Trans. IECE Japan (C), 70-C(3), 1987
高Q安定化空胴を装荷した並列運転発振器

電子通信学会論文誌(B), 66-B(1), 1983
Parallel Running Oscillators with a High Q Stabilizing Cavity

Trans. IECE Japan (B), 66-B(1), 1983

Professional Memberships

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