Koji TSUTSUMI


A 0.3-to-5.5 GHz Digital Frequency Discriminator IC with Time to Digital Converter and Edge Counter for Instantaneous Frequency Measurement
Akihito HIRAI Koji TSUTSUMI Hideyuki NAKAMIZO Eiji TANIGUCHI Kenichi TAJIMA Kazutomi MORI Masaomi TSURU Mitsuhiro SHIMOZAWA 
Publication:   
Publication Date: 2019/07/01
Vol. E102-C  No. 7  pp. 547-557
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Their Application Technologies)
Category: 
Keyword: 
digital frequency discriminator (DFD)instantaneous frequency measurement (IFM)time-to-digital converter (TDC)multiphase clock
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A Compact RF Frontend Module of Active Phased Array Antenna for High SHF Wideband Massive MIMO in 5G
Hideyuki NAKAMIZO Shintaro SHINJO Koji TSUTSUMI Satoshi YAMAGUCHI Hideharu YOSHIOKA Akihiro OKAZAKI Akinori TAIRA Kenichi TAJIMA 
Publication:   
Publication Date: 2017/10/01
Vol. E100-C  No. 10  pp. 818-824
Type of Manuscript:  INVITED PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: 
Keyword: 
massive MIMOactive phased array antennahigh SHFRF frontend5G
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A 15GHz-Band 4-Channel Transmit/Receive RF Core-Chip for High SHF Wide-Band Massive MIMO in 5G
Koji TSUTSUMI Takaya MARUYAMA Wataru YAMAMOTO Takanobu FUJIWARA Tatsuya HAGIWARA Ichiro SOMADA Eiji TANIGUCHI Mitsuhiro SHIMOZAWA 
Publication:   
Publication Date: 2017/10/01
Vol. E100-C  No. 10  pp. 825-832
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: 
Keyword: 
massive MIMOactive phased array antennahigh SHFphase shiftersvariable gain amplifiersCMOS integrated circuits
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Adaptively Phase-Shift Controlled Self-Injection Locked VCO
Masaomi TSURU Kengo KAWASAKI Koji TSUTSUMI Eiji TANIGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/07/01
Vol. E98-C  No. 7  pp. 677-684
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: Active Circuits/Devices/Monolithic Microwave Integrated Circuits
Keyword: 
self-injection locked oscillatorphase noisedelay linesphase-shift control
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0.4-5.8 GHz SiGe-MMIC Quadrature Modulator Employing Self Current Controlled Mixer for Cognitive Radio
Shintaro SHINJO Fumiki ONOMA Koji TSUTSUMI Noriharu SUEMATSU Mitsuhiro SHIMOZAWA Hiroshi HARADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/12/01
Vol. E92-B  No. 12  pp. 3701-3710
Type of Manuscript:  Special Section PAPER (Special Section on Dynamic Spectrum Access)
Category: Wideband RF Systems
Keyword: 
microwaveMMIC transmittersMMIC mixersmobile communicationmodulationwireless LAN
 Summary | Full Text:PDF