Koji Tsutsumi

0.4-5.8 GHz SiGe-MMIC Quadrature Modulator Employing Self Current Controlled Mixer for Cognitive Radio

Hiroshi Harada, Shintaro Shinjo, Mitsuhiro Shimozawa, 2009, IEICE Trans. Commun..

A Compact RF Frontend Module of Active Phased Array Antenna for High SHF Wideband Massive MIMO in 5G

Akihiro Okazaki, Shintaro Shinjo, Hideyuki Nakamizo, 2017, IEICE Trans. Electron..

Integrating the Front End: A Highly Integrated RF Front End for High-SHF Wide-Band Massive MIMO in 5G

Keigo Nakatani, Shintaro Shinjo, Hideyuki Nakamizo, 2017, IEEE Microwave Magazine.

1.4 deg.-rms 6-bit vector-sum phase shifter calibrating I-Q generator error by VGA for high SHF wide-band massive MIMO in 5G

Mitsuhiro Shimozawa, Takaya Maruyama, Koji Tsutsumi, 2016, 2016 Asia-Pacific Microwave Conference (APMC).

Fast and highly accurate RF phase detector with analog integrator for APAA system

Hideyuki Nakamizo, Mitsuhiro Shimozawa, Morishige Hieda, 2013, 2013 Asia-Pacific Microwave Conference Proceedings (APMC).

Image rejection mixer using tunable poly phase filter with negative feedback control and reference resistor

Akihito Hirai, Mitsuhiro Shimozawa, Koji Tsutsumi, 2016, 2016 Asia-Pacific Microwave Conference (APMC).

Adaptively Phase-Shift Controlled Self-Injection Locked VCO

Koji Tsutsumi, Masaomi Tsuru, Koji Tsutsumi, 2015, IEICE Trans. Electron..

A 20GHz low noise CMOS active baiun using asymmetric transformer

Koji Tsutsumi, Takayuki Nakai, Eiji Taniguchi, 2014, 2014 Asia-Pacific Microwave Conference.

A 0.3-to-5.5 GHz Digital Frequency Discriminator IC with Time to Digital Converter

Hideyuki Nakamizo, Koji Tsutsumi, Eiji Taniguchi, 2015, 2015 IEEE MTT-S International Microwave Symposium.

Development of active phased array antenna for high SHF wideband massive MIMO in 5G

Shintaro Shinjo, Hideyuki Nakamizo, Hiroaki Miyashita, 2017, 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting.

A low noise multi-PFD PLL with timing shift circuit

Mitsuhiro Shimozawa, Koji Tsutsumi, Eiji Taniguchi, 2012, 2012 IEEE/MTT-S International Microwave Symposium Digest.