Masashi NAKATSUGAWA


Frequency Dependency of Path Loss Between Different Floors in An Indoor Office Environment at UHF and SHF Bands
Motoharu SASAKI Minoru INOMATA Wataru YAMADA Naoki KITA Takeshi ONIZAWA Masashi NAKATSUGAWA Koshiro KITAO Tetsuro IMAI 
Publication:   
Publication Date: 2018/02/01
Vol. E101-B  No. 2  pp. 373-382
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2016)
Category: Propagation
Keyword: 
propagation5Gmillimeter waveUHFSHFhigh frequency bandsindoor officefloor penetration loss
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Path Loss Model for Outdoor-to-Indoor Corridor Up to 40GHz Band in Microcell Environments
Minoru INOMATA Motoharu SASAKI Wataru YAMADA Takeshi ONIZAWA Masashi NAKATSUGAWA Nobutaka OMAKI Koshiro KITAO Tetsuro IMAI Yukihiko OKUMURA 
Publication:   
Publication Date: 2017/02/01
Vol. E100-B  No. 2  pp. 242-251
Type of Manuscript:  Special Section PAPER (Special Section on Antenna and Propagation Technologies Contributing to Realization of Next Generation Wireless Systems)
Category: 
Keyword: 
propagation5Goutdoor-to-indoor path loss modelmillimeter wavehigh frequency bandsmicrocell environments
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Development of Wireless Systems for Disaster Recovery Operations
Takashi HIROSE Fusao NUNO Masashi NAKATSUGAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/07/01
Vol. E98-C  No. 7  pp. 630-635
Type of Manuscript:  INVITED PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: 
Keyword: 
disaster recovery operationbusiness radiosubscriber wireless systemsatellite communicationsthe Great East Japan Earthquake
 Summary | Full Text:PDF(2.8MB)

FOREWORD
Masashi NAKATSUGAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/10/01
Vol. E96-C  No. 10  pp. 1209-1209
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(228.1KB)

Frame Resource Allocation Schemes that Improve System Capacity and Latency Performance of Time-Division Duplex Multihop Relay Systems
Youhei OHNO Tatsuya SHIMIZU Takefumi HIRAGURI Masashi NAKATSUGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/08/01
Vol. E93-B  No. 8  pp. 2035-2042
Type of Manuscript:  Special Section PAPER (Special Section on Implementation, Experiments, and Practice for Ad Hoc and Mesh Networks)
Category: 
Keyword: 
multihop relayframe resource allocationsystem capacitylatency
 Summary | Full Text:PDF(1.6MB)

A Highly Linearized MMIC Amplifier Using a Combination of a Newly Developed LD-FET and D-FET Simultaneously Fabricated with a Self-Alignment/Selective Ion-Implantation Process
Masashi NAKATSUGAWA Masahiro MURAGUCHI Yo YAMAGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/12/01
Vol. E85-C  No. 12  pp. 1981-1989
Type of Manuscript:  Special Section PAPER (Special Issue on Low-Distortion,High-Power,High-Efficiency Active Device and Circuit Technology)
Category: 
Keyword: 
linearized amplifierMMICMESFETself-alignment/selective ion-implantation processlow-distortion
 Summary | Full Text:PDF(1.2MB)

An Effective Data Transmission Control Method for Mobile Terminals in Spot Communication Systems
Hiroshi YOSHIOKA Masashi NAKATSUGAWA Shuji KUBOTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/07/25
Vol. E83-A  No. 7  pp. 1328-1337
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
spot communication systemsdata transmission methodintelligent transport systems (ITS)DSRC protocol
 Summary | Full Text:PDF(1.4MB)

Software Radio Base and Personal Station Prototypes
Yasuo SUZUKI Kazuhiro UEHARA Masashi NAKATSUGAWA Yushi SHIRATO Shuji KUBOTA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/06/25
Vol. E83-B  No. 6  pp. 1261-1268
Type of Manuscript:  Special Section PAPER (Special Issue on Software Defined Radio and Its Technologies)
Category: 
Keyword: 
softwaresoftware radiodigital signal processorpersonal handy phone system
 Summary | Full Text:PDF(793.2KB)

A High-Efficiency Linear Power Amplifier with a Novel Output Power Control Technique
Yo YAMAGUCHI Masahiro MURAGUCHI Tadao NAKAGAWA Masashi NAKATSUGAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1998/06/25
Vol. E81-C  No. 6  pp. 892-897
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Module Technology)
Category: Semiconductor Devices and Amplifiers
Keyword: 
high efficiencylinearoutput power controlpower amplifiermobile communication
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Design of a K-Band Power Amplifier Using On-Wafer-Tuning Load-Pull Method
Minoru IDA Masashi NAKATSUGAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1998/06/25
Vol. E81-C  No. 6  pp. 882-885
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Module Technology)
Category: Semiconductor Devices and Amplifiers
Keyword: 
power amplifierload-pull measurementon-waferMMICHEMT
 Summary | Full Text:PDF(550.1KB)

A Novel Optical Control Technique Using Tunable Inductance Circuits
Hitoshi HAYASHI Masashi NAKATSUGAWA Tadao NAKAGAWA Masahiro MURAGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1998/02/25
Vol. E81-C  No. 2  pp. 299-304
Type of Manuscript:  PAPER
Category: Microwave and Millimeter Wave Technology
Keyword: 
opticalcontroltunableinductancecircuit
 Summary | Full Text:PDF(630.3KB)

Performance of GaAs MESFET Photodetectors with Wide Drain-to-Gate Distances in Subcarrier Optical Transmission
Tatsuya SHIMIZU Masashi NAKATSUGAWA Hiroyuki OHTSUKA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1997/01/25
Vol. E80-C  No. 1  pp. 160-167
Type of Manuscript:  PAPER
Category: Opto-Electronics
Keyword: 
optically controlled MESFETdrain-to-gate distanceMMICsubcarrier optical transmissionoptical coupling efficiency
 Summary | Full Text:PDF(634.9KB)

Quasi-Transmission-Line Variable Reactance Circuits for a Wide Variable-Phase Range X-Band Monolithic Phase Shifter
Masashi NAKATSUGAWA Masahiro MURAGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1997/01/25
Vol. E80-C  No. 1  pp. 168-173
Type of Manuscript:  PAPER
Category: Microwave and Millimeter Wave Technology
Keyword: 
phase shiftertransmission linequadrature hybridshunt capacitorreflection
 Summary | Full Text:PDF(461.7KB)