Hiroshi IWAI


A Spatial Fading Emulator for Evaluation of MIMO Antennas in a Cluster Environment
Tsutomu SAKATA Atsushi YAMAMOTO Koichi OGAWA Hiroshi IWAI Jun-ichi TAKADA Kei SAKAGUCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/10/01
Vol. E97-B  No. 10  pp. 2127-2135
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Measurement and Design Techniques on Antennas, Propagation and Wireless Systems)
Category: 
Keyword: 
fading emulatorclusterangular power spectrumOTAhandset antennaMIMOchannel capacity
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Equivalent Noise Temperature Representation for Scaled MOSFETs
Hiroshi SHIMOMURA Kuniyuki KAKUSHIMA Hiroshi IWAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/10/01
Vol. E93-C  No. 10  pp. 1550-1552
Type of Manuscript:  LETTER
Category: Semiconductor Materials and Devices
Keyword: 
MOSFETsthermal noiseequivalent noise temperature
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Performance Evaluation of Spatial Correlation Characteristics for Handset Antennas Using Spatial Fading Emulator Based on Clarke's Model
Hiroshi IWAI Kei SAKAGUCHI Tsutomu SAKATA Atsushi YAMAMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/10/01
Vol. E93-B  No. 10  pp. 2514-2522
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Technologies in Antennas and Propagation in Conjunction with Main Topics of ISAP2009)
Category: Mobile Propagation
Keyword: 
spatial fading emulatorspatial correlation characteristicmulti-path propagation environmenthandset antennasscatterers
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Effect of High Frequency Noise Current Sources on Noise Figure for Sub-50 nm Node MOSFETs
Hiroshi SHIMOMURA Kuniyuki KAKUSHIMA Hiroshi IWAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/05/01
Vol. E93-C  No. 5  pp. 678-684
Type of Manuscript:  PAPER
Category: Semiconductor Materials and Devices
Keyword: 
MOSFETsthermal noisenoise figurenoise parameters
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Performance Analysis of MIMO Schemes in Residential Home Environment via Wideband MIMO Propagation Measurement
Gia Khanh TRAN Nguyen Dung DAO Kei SAKAGUCHI Kiyomichi ARAKI Hiroshi IWAI Tsutomu SAKATA Koichi OGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/04/01
Vol. E93-A  No. 4  pp. 814-829
Type of Manuscript:  PAPER
Category: Communication Theory and Signals
Keyword: 
MIMO-OFDMwideband MIMO channel measurementresidential home environmentthroughput performance evaluation
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Parasitic Effects in Multi-Gate MOSFETs
Yusuke KOBAYASHI C. Raghunathan MANOJ Kazuo TSUTSUI Venkanarayan HARIHARAN Kuniyuki KAKUSHIMA V. Ramgopal RAO Parhat AHMET Hiroshi IWAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/10/01
Vol. E90-C  No. 10  pp. 2051-2056
Type of Manuscript:  PAPER
Category: Integrated Electronics
Keyword: 
multi-gateFin-FETshigh-K dielectricfringe capacitanceparasitic effect
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3-D Angular Spectrum Measurements at 5 GHz in a Residential Two-Story House
Hiroshi IWAI Tsutomu SAKATA Atsushi YAMAMOTO Kei SAKAGUCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/09/01
Vol. E90-B  No. 9  pp. 2344-2351
Type of Manuscript:  Special Section PAPER (Special Section on 2006 International Symposium on Antennas and Propagation)
Category: Propagation
Keyword: 
3-D angular spectrumresidential housepropagationMIMOchannel capacity
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A Low-Profile Bi-Directional Cavity Antenna with Broadband Impedance Characteristics
Atsushi YAMAMOTO Hiroshi IWAI Toshimitsu MATSUYOSHI Koichi OGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/09/01
Vol. E84-B  No. 9  pp. 2490-2497
Type of Manuscript:  Special Section PAPER (Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems)
Category: Mobile Antennas
Keyword: 
bi-directional radiation patterncavity antennaIMT-2000picocell base station
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A 1. 5 GHz CMOS Low Noise Amplifier
Ryuichi FUJIMOTO Shoji OTAKA Hiroshi IWAI Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/03/25
Vol. E81-A  No. 3  pp. 382-388
Type of Manuscript:  Special Section PAPER (Special Section of Selected Papers from the 10th Karuizawa Workshop on Circuits and Systems)
Category: 
Keyword: 
low noise amplifierCMOS technologyshort channelinductorhigh frequency circuit
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Monte Carlo Analysis of Velocity Overshoot Effects in Bipolar Devices with and without an i-Layer
Yoshiroh TSUBOI Claudio FIFGNA Enrico SANGIORGI Bruno RICCÒ Tetsunori WADA Yasuhiro KATSUMATA Hiroshi IWAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1994/02/25
Vol. E77-C  No. 2  pp. 174-178
Type of Manuscript:  Special Section PAPER (Special Issue on 1993 VLSI Process and Device Modeling Workshop (VPAD 93))
Category: Device Simulation
Keyword: 
bipolar transistori-layercollector signal delayvelocity overshoot
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Mechanical Stress Analysis of Trench Isolation Using a Two-Dimensional Simulation
Satoshi MATSUDA Nobuyuki ITOH Chihiro YOSHINO Yoshiroh TSUBOI Yasuhiro KATSUMATA Hiroshi IWAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1994/02/25
Vol. E77-C  No. 2  pp. 124-128
Type of Manuscript:  Special Section PAPER (Special Issue on 1993 VLSI Process and Device Modeling Workshop (VPAD 93))
Category: Process Simulation
Keyword: 
trench isolationshallow trenchdeep trenchhigh-speed bipolar LSIsleakage currentmechanical stress
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