Yasuhiko HARA


Hybrid Defect Detection Method Based on the Shape Measurement and Feature Extraction for Complex Patterns
Hilario Haruomi KOBAYASHI Yasuhiko HARA Hideaki DOI Kazuo TAKAI Akiyoshi SUMIYA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2000/07/25
Vol. E83-D  No. 7  pp. 1338-1345
Type of Manuscript:  Special Section PAPER (Special Issue on Machine Vision Applications)
Category: 
Keyword: 
printed circuit boardimage processingshape measurementfeature extractionautomatic inspection
 Summary | Full Text:PDF(1.7MB)

A Nonlinear GaAs FET Model Suitable for Active and Passive MM-Wave Applications
Kohei FUJII Yasuhiko HARA Fadhel M. GHANNOUCHI Toshiyuki YAKABE Hatsuo YABE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/02/25
Vol. E83-A  No. 2  pp. 228-235
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
nonlinear modelmm-waveGaAs FETsimulation
 Summary | Full Text:PDF(1.1MB)

Design of S-Band 90-Watt Solid-State Power Amplifier Module Using an Improved Nonlinear FET Model
Kohei FUJII Yasuhiko HARA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/07/25
Vol. E82-C  No. 7  pp. 1047-1053
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
Category: Active Devices and Circuits
Keyword: 
MMICGaAs FETnonlinear modelpower amplifier
 Summary | Full Text:PDF(1.1MB)

An Application of the MCM Technology into an MMIC T/R Module for Phased Array Antennas
Kohei FUJII Yasuhiko HARA Yuzo SHIBUYA Yuji TAKANO Taturo SAKAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1998/06/25
Vol. E81-C  No. 6  pp. 819-826
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Module Technology)
Category: Functional Modules and the Design Technology
Keyword: 
multiple chip moduleT/R modulephased arrayMMIC
 Summary | Full Text:PDF(936.8KB)

A Single-Layer Linear-to-Circular Polarization Converter for a Narrow-Wall Slotted Waveguide Array
Kyeong-Sik MIN Jiro HIROKAWA Kimio SAKURAI Makoto ANDO Naohisa GOTO Yasuhiko HARA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1997/08/25
Vol. E80-B  No. 8  pp. 1264-1272
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
single layerpolarization converterdipole arraynarrow-wallslotwaveguide
 Summary | Full Text:PDF(762.2KB)