Shuhei AMAKAWA


300-GHz-Band OFDM Video Transmission with CMOS TX/RX Modules and 40dBi Cassegrain Antenna toward 6G
Yohei MORISHITA Sangyeop LEE Toshihiro TERAOKA Ruibing DONG Yuichi KASHINO Hitoshi ASANO Shinsuke HARA Kyoya TAKANO Kosuke KATAYAMA Takenori SAKAMOTO Naganori SHIRAKATA Koji TAKINAMI Kazuaki TAKAHASHI Akifumi KASAMATSU Takeshi YOSHIDA Shuhei AMAKAWA Minoru FUJISHIMA 
Publication:   
Publication Date: 2021/10/01
Vol. E104-C  No. 10  pp. 576-586
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technologies)
Category: 
Keyword: 
6GTHz300GHzCassegrain antennaOFDMCMOStransmitterreceivermodule
 Summary | Full Text:PDF(4MB)

32-Gbit/s CMOS Receivers in 300-GHz Band
Shinsuke HARA Kosuke KATAYAMA Kyoya TAKANO Ruibing DONG Issei WATANABE Norihiko SEKINE Akifumi KASAMATSU Takeshi YOSHIDA Shuhei AMAKAWA Minoru FUJISHIMA 
Publication:   
Publication Date: 2018/07/01
Vol. E101-C  No. 7  pp. 464-471
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Their Application Technologies)
Category: 
Keyword: 
ReceiverCMOS integrated circuitsterahertzfrequency conversion mixersfrequency multipliersamplifiersquadrature amplitude modulation
 Summary | Full Text:PDF(3MB)

Integrated-Circuit Approaches to THz Communications: Challenges, Advances, and Future Prospects
Minoru FUJISHIMA Shuhei AMAKAWA 
Publication:   
Publication Date: 2017/02/01
Vol. E100-A  No. 2  pp. 516-523
Type of Manuscript:  INVITED PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
terahertzwireless communicationsintegrated circuits
 Summary | Full Text:PDF(3.2MB)

Scattered Reflections on Scattering Parameters — Demystifying Complex-Referenced S Parameters —
Shuhei AMAKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/10/01
Vol. E99-C  No. 10  pp. 1100-1112
Type of Manuscript:  INVITED PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: 
Keyword: 
S parametersreflection coefficienttransmission coefficienttraveling wavespseudo wavespower wavesreference impedancerenormalization transformation
 Summary | Full Text:PDF(624.7KB)

Compact 141-GHz Differential Amplifier with 20-dB Peak Gain and 22-GHz 3-dB Bandwidth
Shinsuke HARA Kosuke KATAYAMA Kyoya TAKANO Issei WATANABE Norihiko SEKINE Akifumi KASAMATSU Takeshi YOSHIDA Shuhei AMAKAWA Minoru FUJISHIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/10/01
Vol. E99-C  No. 10  pp. 1156-1163
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: 
Keyword: 
millimeter wave circuitsCMOS processamplifiersfrequency estimation
 Summary | Full Text:PDF(1.4MB)

Tehrahertz CMOS Design for Low-Power and High-Speed Wireless Communication
Minoru FUJISHIMA Shuhei AMAKAWA Kyoya TAKANO Kosuke KATAYAMA Takeshi YOSHIDA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/12/01
Vol. E98-C  No. 12  pp. 1091-1104
Type of Manuscript:  INVITED PAPER (Special Section on Terahertz Waves Coming to the Real World)
Category: 
Keyword: 
high-frequency circuit designCMOSmillimeter waveterahertz
 Summary | Full Text:PDF(5.3MB)

E-Band 65nm CMOS Low-Noise Amplifier Design Using Gain-Boost Technique
Kosuke KATAYAMA Mizuki MOTOYOSHI Kyoya TAKANO Chen Yang LI Shuhei AMAKAWA Minoru FUJISHIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/06/01
Vol. E97-C  No. 6  pp. 476-485
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
Category: 
Keyword: 
body biascoupled resonatordevice modelingE-band communicationmillimeter waveoptimizer
 Summary | Full Text:PDF(5.1MB)

Modeling of Short-Millimeter-Wave CMOS Transmission Line with Lossy Dielectrics with Specific Absorption Spectrum
Kyoya TAKANO Shuhei AMAKAWA Kosuke KATAYAMA Mizuki MOTOYOSHI Minoru FUJISHIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/10/01
Vol. E96-C  No. 10  pp. 1311-1318
Type of Manuscript:  Special Section PAPER (Special Section on Emerging Technologies and Applications for Microwave and Millimeter-Wave Systems)
Category: 
Keyword: 
CMOSlossy dielectricsmodelingshort-millimeter wavetransmission line
 Summary | Full Text:PDF(1.3MB)

RF CMOS Integrated Circuit: History, Current Status and Future Prospects
Noboru ISHIHARA Shuhei AMAKAWA Kazuya MASU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/02/01
Vol. E94-A  No. 2  pp. 556-567
Type of Manuscript:  INVITED PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
RFCMOStransceiverintegrated circuitMEMSfuture
 Summary | Full Text:PDF(2MB)

A Universal Equivalent Circuit Model for Ceramic Capacitors
Koh YAMANAGA Shuhei AMAKAWA Kazuya MASU Takashi SATO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/03/01
Vol. E93-C  No. 3  pp. 347-354
Type of Manuscript:  Special Section PAPER (Special Section on Circuits and Design Techniques for Advanced Large Scale Integration)
Category: 
Keyword: 
ceramic capacitormoment methodequivalent circuitinductance
 Summary | Full Text:PDF(809KB)

Layout-Aware Compact Model of MOSFET Characteristics Variations Induced by STI Stress
Kenta YAMADA Takashi SATO Shuhei AMAKAWA Noriaki NAKAYAMA Kazuya MASU Shigetaka KUMASHIRO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/07/01
Vol. E91-C  No. 7  pp. 1142-1150
Type of Manuscript:  PAPER
Category: Semiconductor Materials and Devices
Keyword: 
STIstressmodelingSPICElayout-aware
 Summary | Full Text:PDF(1.3MB)

Single-Electron Circuit Simulation
Shuhei AMAKAWA Hideaki MAJIMA Hironobu FUKUI Minoru FUJISHIMA Koichiro HOH 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1998/01/25
Vol. E81-C  No. 1  pp. 21-29
Type of Manuscript:  Special Section PAPER (Special Issue on Technology Challenges for Single Electron Devices)
Category: 
Keyword: 
Coulomb blockade of tunnelingmaster equationMonte Carlo methodSETSPICE
 Summary | Full Text:PDF(818.1KB)

Proposal of a Schottky-Barrier SET Aiming at a Future Integrated Device
Minoru FUJISHIMA Hironobu FUKUI Shuhei AMAKAWA Koichiro HOH 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1997/07/25
Vol. E80-C  No. 7  pp. 881-885
Type of Manuscript:  Special Section PAPER (Special Issue on New Concept Device and Novel Architecture LSIs)
Category: Quantum Devices
Keyword: 
short channel devicesingle electronCoulomb blockade
 Summary | Full Text:PDF(491.7KB)