Takaya MARUYAMA


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
 Summary | Full Text:PDF(2.9MB)

A Multiband LTE SAW-Less CMOS Transmitter with Source-Follower-Driven Passive Mixers, Envelope-Tracked RF-PGAs, and Marchand Baluns
Takao KIHARA Tomohiro SANO Masakazu MIZOKAMI Yoshikazu FURUTA Mitsuhiko HOKAZONO Takaya MARUYAMA Tetsuya HEIMA Hisayasu SATO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/06/01
Vol. E96-C  No. 6  pp. 774-782
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
Category: 
Keyword: 
multibandLTESAW-lessCMOStransmitterquadrature modulatorsource followerenvelope-trackingprogrammable gain amplifierbalun
 Summary | Full Text:PDF(3.4MB)

A Wide Dynamic Range Variable Gain Amplifier with Enhanced IP1 dB and Temperature Compensation
Hisayasu SATO Takaya MARUYAMA Toshimasa MATSUOKA Kenji TANIGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/08/01
Vol. E94-C  No. 8  pp. 1311-1319
Type of Manuscript:  PAPER
Category: Integrated Electronics
Keyword: 
VGA1 dB compression pointnoise figurewirelesstransceiverIIP3
 Summary | Full Text:PDF(1.1MB)