Hiroshi OKAZAKI

Novel Configuration for Phased-Array Antenna System Employing Frequency-Controlled Beam Steering Method
Atsushi FUKUDA Hiroshi OKAZAKI Shoichi NARAHASHI 
Publication:   
Publication Date: 2022/12/01
Vol. E105-C  No. 12  pp. 740-749
Type of Manuscript:  PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
analog beam forming, beam steering, broadband communication, phased arrays, RF local signal phase control, 
 Summary | Full Text:PDF
Rectifier Circuit using High-Impedance Feedback Line for Microwave Wireless Power Transfer Systems
Seiya MIZUNO Ryosuke KASHIMURA Tomohiro SEKI Maki ARAI Hiroshi OKAZAKI Yasunori SUZUKI 
Publication:   
Publication Date: 2021/10/01
Vol. E104-C  No. 10  pp. 552-558
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technologies)
Category: 
Keyword: 
wireless power transfer, rectifier circuit, feedback line, microwave frequency, quasi-millimeter and millimeter-wave frequency, 
 Summary | Full Text:PDF
FOREWORD
Hiroshi OKAZAKI 
Publication:   
Publication Date: 2020/10/01
Vol. E103-C  No. 10  pp. 396-396
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF
IMD Components Compensation Conditions for Dual-Band Feed-Forward Power Amplifier
Yasunori SUZUKI Hiroshi OKAZAKI Shoichi NARAHASHI 
Publication:   
Publication Date: 2020/10/01
Vol. E103-C  No. 10  pp. 434-444
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technologies)
Category: Microwaves, Millimeter-Waves
Keyword: 
feed-forward power amplifier, dual-band, intermodulation distortion, 
 Summary | Full Text:PDF
Theoretical Analysis of Center Frequency and Bandwidth Tunable Resonator Employing Coupled Line and Switches
Kunihiro KAWAI Hiroshi OKAZAKI Shoichi NARAHASHI Mizuki MOTOYOSHI Noriharu SUEMATSU 
Publication:   
Publication Date: 2019/08/01
Vol. E102-C  No. 8  pp. 612-621
Type of Manuscript:  PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
tunable resonators, coupled line, microstrip lines, switches, 
 Summary | Full Text:PDF
Resonant Frequency and Bandwidth Tunable Ring Resonator Using GaAs FET SPST Switches
Kunihiro KAWAI Hiroshi OKAZAKI Shoichi NARAHASHI Noriharu SUEMATSU 
Publication:   
Publication Date: 2019/05/01
Vol. E102-C  No. 5  pp. 388-398
Type of Manuscript:  PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
tunable resonators, ring resonators, microstrip lines, switches, 
 Summary | Full Text:PDF
26 GHz Band Extremely Low-Profile Front-End Configuration Employing Integrated Modules of Patch Antennas and SIW Filters
Yasunori SUZUKI Takana KAHO Kei SATOH Hiroshi OKAZAKI Maki ARAI Yo YAMAGUCHI Shoichi NARAHASHI Hiroyuki SHIBA 
Publication:   
Publication Date: 2017/12/01
Vol. E100-C  No. 12  pp. 1097-1107
Type of Manuscript:  PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
array antenna, SIW filter, 3D-MMIC, lower profile, radio access unit, 
 Summary | Full Text:PDF
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, 
 Summary | Full Text:PDF
Tunable Resonator Employing Comb-shaped Transmission Line and Semiconductor Switches
Kunihiro KAWAI Daisuke KOIZUMI Hiroshi OKAZAKI Shoichi NARAHASHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/08/01
Vol. E97-C  No. 8  pp. 795-802
Type of Manuscript:  PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
Tunable resonators, microstrip lines, switches, 
 Summary | Full Text:PDF
Compact Tunable Isolator with a Variable Capacitor
Takayuki FURUTA Atsushi FUKUDA Hiroshi OKAZAKI Shoichi NARAHASHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/01/01
Vol. E96-C  No. 1  pp. 84-92
Type of Manuscript:  PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
multi-band, tunable, isolator, varactor diode, 
 Summary | Full Text:PDF
Low-Loss Matching Network Design for Band-Switchable Multi-Band Power Amplifier
Atsushi FUKUDA Takayuki FURUTA Hiroshi OKAZAKI Shoichi NARAHASHI Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/07/01
Vol. E95-C  No. 7  pp. 1172-1181
Type of Manuscript:  Special Section PAPER (Special Section on Recent Trends of Microwave Systems and Their Fundamental Technologies)
Category: 
Keyword: 
power amplifier, reconfigurable, matching network, multi-band, switch, 
 Summary | Full Text:PDF
Detailed Analysis of Multilayer Broad-Side Coupler with a Symmetric Structure
Hiroshi OKAZAKI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/08/01
Vol. E94-C  No. 8  pp. 1253-1261
Type of Manuscript:  PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
broad-side couplers, coupled transmission lines, multilayer MMIC, symmetric structure, 
 Summary | Full Text:PDF
Highly Efficient Multi-Band Power Amplifier Employing Reconfigurable Matching and Biasing Networks
Atsushi FUKUDA Hiroshi OKAZAKI Shoichi NARAHASHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/07/01
Vol. E93-C  No. 7  pp. 949-957
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies)
Category: 
Keyword: 
power amplifier, reconfigurable, matching network, biasing network, multi-band, switch, microelectro mechanical systems, 
 Summary | Full Text:PDF
Novel Band-Reconfigurable High Efficiency Power Amplifier Employing RF-MEMS Switches
Atsushi FUKUDA Hiroshi OKAZAKI Tetsuo HIROTA Yasushi YAMAO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/11/01
Vol. E88-C  No. 11  pp. 2141-2149
Type of Manuscript:  PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
band-switchable matching network, microelectro mechanical devices, multi-band, switches, power amplifiers, 
 Summary | Full Text:PDF
A Monolithic Linearizer Using an Even-Order-Distortion Controller for an S-Band High Power Amplifier
Takana KAHO Hiroshi OKAZAKI Tadao NAKAGAWA Katsuhiko ARAKI Kohji HORIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/12/01
Vol. E85-C  No. 12  pp. 1959-1966
Type of Manuscript:  Special Section PAPER (Special Issue on Low-Distortion,High-Power,High-Efficiency Active Device and Circuit Technology)
Category: 
Keyword: 
linearizer, amplifier, GaAs MMIC, satellite communication, 
 Summary | Full Text:PDF
Compact Monolithic Frequency Converters for a V-Band Transmitter/Receiver
Hiroshi OKAZAKI Tetsuo HIROTA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1996/12/25
Vol. E79-B  No. 12  pp. 1754-1758
Type of Manuscript:  Special Section PAPER (Special Issue on Millimeter-wave Short-range Application Systems Technology)
Category: 
Keyword: 
MMIC, up-converter, down-converter, resistive FET mixer, 
 Summary | Full Text:PDF