Hiroyuki Sakai

26 papers Journal 12Unranked 14
YearRankTypeTitle / Venue / Authors
2026 — conf
27.6 A 9.7GHz Self-Linearized-VCO-Based FMCW Chirp Generator Achieving 1.56GHz/μs Slope and 0.57μS Duration with 0.094% RMS Frequency Error.
ISSCC
Daxu Zhang, Yuncheng Zhang, Zezheng Liu, Yuang Xiong, Michele Rossoni, Wenqian Wang, Ashbir Aviat Fadila, Duo Li, Minzhe Tang, Dongfan Xu, Carrel de Gomez, Dingxin Xu, Kazuaki Kunihiro, Hiroyuki Sakai, Kenichi Okada
2026 J jnl
A 142-164-GHz Phased-Array AiP Module With High-Power-Density and High-Efficiency Transceiver in 65-nm CMOS for 6G UE.
IEEE J. Solid State Circuits
Yudai Yamazaki, Yohei Morishita, Sunghwan Park, Takaya Uchino, Chenxin Liu, Jun Sakamaki, Akihiro Egami, Ryosuke Hasaba, Ken Takahashi, Tomoki Abe, Tomohiro Murata, Yoichi Nakagawa, Takashi Tomura, Hiroshi Taneda, Kei Murayama, Makoto Tsukahara, Hiroko Ota, Yoko Nakabayashi, Ryuji Kinugawa, Takumi Kojima, Anyi Tian, Kotaro Ito, Chun Wang, Hans Herdian, Yi Zhang, Zheng Li, Wenqian Wang, Hongye Huang, Dingxin Xu, Sena Kato, Michihiro Ide, Shinsuke Hara, Issei Watanabe, Akifumi Kasamatsu, Yuncheng Zhang, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Koji Takinami, Kenichi Okada
2026 J jnl
A 52 Gb/s 8.9-dBm EIRP 300-GHz-Band Amplifier-Last Outphasing Transmitter With Path Mismatch Calibration in 65-nm CMOS.
IEEE J. Solid State Circuits
Chun Wang, Olivia Angel Yong, Hans Herdian, Wenqian Wang, Abanob Shehata, Carrel da Gomez, Chenxin Liu, Yudai Yamazaki, Kazuaki Kunihiro, Hiroyuki Sakai, Yuncheng Zhang, Atsushi Shirane, Kenichi Okada
2026 J jnl
A Power-Efficient K-Band Circular Polarized 256-Element CMOS Phased-Array Transmitter With Coupler-End Structure for LEO Satellite Terminal.
IEEE J. Solid State Circuits
Xiaolin Wang, Dongwon You, Xi Fu, Takeshi Ota, Michihiro Ide, Sena Kato, Jill C. Mayeda, Makoto Higaki, Jumpei Sudo, Hiroshi Takizawa, Masashi Shirakura, Takashi Tomura, Hiroyuki Sakai, Kazuaki Kunihiro, Kenichi Okada, Atsushi Shirane
2025 — conf
11.1 A 256-Element Ka-Band CMOS Phased-Array Receiver Using Switch-Type Quadrature-Hybrid-First Architecture for Small Satellite Constellations.
ISSCC
Sena Kato, Jill C. Mayeda, Keito Yuasa, Michihiro Ide, Takeshi Ota, Shu Date, Yudai Yamazaki, Xiaolin Wang, Xi Fu, Dongwon You, Makoto Higaki, Jumpei Sudo, Hiroshi Takizawa, Masashi Shirakura, Takashi Tomura, Hiroyuki Sakai, Kazuaki Kunihiro, Kenichi Okada, Atsushi Shirane
2025 — conf
5.6 A Power-Efficient CORDIC-Less Digital Polar Transmitter Using 1b DSM-Based PA Supporting 256-QAM.
ISSCC
Yuncheng Zhang, Zezheng Liu, Duo Li, Minzhe Tang, Yi Zhang, Hongye Huang, Dingxin Xu, Waleed Madany, Ashbir Aviat Fadila, Wenqian Wang, Yuang Xiong, Daxu Zhang, Garry Pranata Kusuma, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada
2025 J jnl
A 160-Gb/s D-Band Bi-Directional CMOS Mixer Covering 112-170 GHz for 6G Transceivers.
IEEE Solid State Circuits Lett.
Chenxin Liu, Yudai Yamazaki, Anyi Tian, Chun Wang, Hans Herdian, Abanob Shehata, Han Nie, Minzhe Tang, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada
2025 J jnl
A 2.5 dB noise figure 28 GHz current-reused noise-cancelling LNA with g
IEICE Electron. Express
Yi Zhang, Minzhe Tang, Dongfan Xu, Jian Pang, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada
2025 — conf
A 4-Stream 8-Element Time-Division MIMO Phased-Array Receiver for 5G NR and Beyond Achieving 9.6Gbps Data Rate.
ASP-DAC
Yi Zhang, Minzhe Tang, Zheng Li, Dongfan Xu, Kazuaki Kunihiro, Hiroyuki Sakai, Atsushi Shirane, Kenichi Okada
2025 J jnl
A 640-Gb/s 4 × 4-MIMO D-Band CMOS Transceiver Chipset.
IEEE J. Solid State Circuits
Chenxin Liu, Zheng Li, Yudai Yamazaki, Hans Herdian, Chun Wang, Anyi Tian, Jun Sakamaki, Han Nie, Xi Fu, Sena Kato, Wenqian Wang, Hongye Huang, Minzhe Tang, Dingxin Xu, Shinsuke Hara, Akifumi Kasamatsu, Takashi Tomura, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada
2025 J jnl
A Compact D-Band Phase Shifter With 0.1-Degree Phase Resolution and Ultra-Low Phase Error in 65-nm CMOS.
IEEE J. Solid State Circuits
Takaya Uchino, Yudai Yamazaki, Anyi Tian, Chenxin Liu, Sunghwan Park, Abanob Shehata, Sena Kato, Takumi Kojima, Haruto Tanaka, Masayuki Kikuchi, Jill C. Mayeda, Ryuji Kinugawa, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada
2025 — conf
A D-Band CMOS Transceiver Chipset Supporting 640Gb/s Date Rate with 4?4 Line-of-Sight MIMO.
ASP-DAC
Chenxin Liu, Zheng Li, Yudai Yamazaki, Hans Herdian, Chun Wang, Anyi Tian, Jun Sakamaki, Han Nie, Xi Fu, Sena Kato, Wenqian Wang, Hongye Huang, Shinsuke Hara, Akifumi Kasamatsu, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada
2025 J jnl
A LEO Satellite Mounted 256-Element 19 GHz CMOS Phased-Array Transmitter With On-Chip Amplitude and Phase Monitor.
IEEE Access
Xiaolin Wang, Dongwon You, Xi Fu, Gao Yuan, Takeshi Ota, Jill C. Mayeda, Jun Sakamaki, Ashbir Aviat Fadila, Makoto Higaki, Jumpei Sudo, Hiroshi Takizawa, Masashi Shirakura, Takashi Tomura, Hiroyuki Sakai, Kazuaki Kunihiro, Kenichi Okada, Atsushi Shirane
2025 J jnl
CORDIC-Less Digital Polar Transmitter Architecture Based on Delta-Sigma Modulator.
IEEE J. Solid State Circuits
Yuncheng Zhang, Zezheng Liu, Duo Li, Minzhe Tang, Yi Zhang, Hongye Huang, Dingxin Xu, Waleed Madany, Ashbir Aviat Fadila, Wenqian Wang, Yuang Xiong, Daxu Zhang, Garry Pranata Kusuma, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada
2025 J jnl
Experimental Testbed for Frequency-Division Multiplexed Joint Radar-Communication System Validation in D-Band Using a 65-nm CMOS Communication Transceiver.
IEEE Access
Carrel da Gomez, Chenxin Liu, Hans Herdian, Hiroyuki Sakai, Kazuaki Kunihiro, Kenichi Okada
2024 — conf
24.3 A 236-to-266GHz 4-Element Amplifier-Last Phased-Array Transmitter in 65nm CMOS.
ISSCC
Chun Wang, Hans Herdian, Wenbin Zheng, Chenxin Liu, Jill C. Mayeda, Yuxuan Liu, Olivia Angel Yong, Wenqian Wang, Yuncheng Zhang, Carrel da Gomez, Abanob Shehata, Sena Kato, Ibrahim Abdo, Teruo Jyo, Hiroshi Hamada, Hiroyuki Takahashi, Hiroyuki Sakai, Atsushi Shirane, Kenichi Okada
2024 — conf
35-60GHz Switchless IF Bi-Directional Amplifier Using 65nm CMOS for 300GHz-Band Transceivers.
A-SSCC
Abanob Shehata, Hans Herdian, Chun Wang, Chenxin Liu, Kazuaki Kunihiro, Hiroyuki Sakai, Atsushi Shirane, Kenichi Okada
2024 — conf
A 28GHz 4-Stream Time-Division MIMO Phased-Array Receiver Utilizing Nyquist-Rate Fast Beam Switching for 5G and Beyond.
VLSI Technology and Circuits
Yi Zhang, Minzhe Tang, Jian Pang, Zheng Li, Dongfan Xu, Dingxin Xu, Yuncheng Zhang, Kazuaki Kunihiro, Hiroyuki Sakai, Atsushi Shirane, Kenichi Okada
2024 — conf
A 640-Gb/s 4×4-MIMO D-Band CMOS Transceiver Chipset.
VLSI Technology and Circuits
Chenxin Liu, Zheng Li, Yudai Yamazaki, Hans Herdian, Chun Wang, Anyi Tian, Jun Sakamaki, Han Nie, Xi Fu, Sena Kato, Wenqian Wang, Hongye Huang, Shinsuke Hara, Akifumi Kasamatsu, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada
2024 — conf
A Compact D-Band Phase Shifter with 0.1-degree Phase Resolution and 0.8-degree RMS Phase Error in 65 nm CMOS.
A-SSCC
Takaya Uchino, Yudai Yamazaki, Sunghwan Park, Chenxin Liu, Anyi Tian, Abanob Shehata, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada
2024 J jnl
A Sub-THz Full-Duplex Phased-Array Transceiver With Self-Interference Cancellation and LO Feedthrough Suppression.
IEEE J. Solid State Circuits
Chun Wang, Ibrahim Abdo, Chenxin Liu, Carrel da Gomez, Jill C. Mayeda, Hans Herdian, Wenqian Wang, Xi Fu, Dongwon You, Abanob Shehata, Sunghwan Park, Yun Wang, Jian Pang, Hiroyuki Sakai, Atsushi Shirane, Kenichi Okada
2023 — conf
A 2.95mW/element Ka-band CMOS Phased-Array Receiver Utilizing On-Chip Distributed Radiation Sensors in Low-Earth-Orbit Small Satellite Constellation.
ISSCC
Xi Fu, Dongwon You, Xiaolin Wang, Michihiro Ide, Yuncheng Zhang, Jun Sakamaki, Ashbir Aviat Fadila, Zheng Li, Yun Wang, Jumpei Sudo, Makoto Higaki, Soichiro Inoue, Takashi Eishima, Takashi Tomura, Jian Pang, Hiroyuki Sakai, Kenichi Okada, Atsushi Shirane
2023 — conf
A Dual-Mode Bi-Directional CMOS Mixer Using Push-Push Doubler for 300GHz-Band Transceivers.
ESSCIRC
Chenxin Liu, Ibrahim Abdo, Chun Wang, Hiroyuki Sakai, Atsushi Shirane, Kenichi Okada
2023 J jnl
A Low-Power 256-Element Ka-Band CMOS Phased-Array Receiver With On-Chip Distributed Radiation Sensors for Small Satellite Constellations.
IEEE J. Solid State Circuits
Xi Fu, Dongwon You, Xiaolin Wang, Yun Wang, Carolyn Jill Mayeda, Yuan Gao, Michihiro Ide, Yuncheng Zhang, Jun Sakamaki, Ashbir Aviat Fadila, Zheng Li, Jumpei Sudo, Makoto Higaki, Soichiro Inoue, Takashi Eishima, Takashi Tomura, Jian Pang, Hiroyuki Sakai, Kenichi Okada, Atsushi Shirane
2023 — conf
A Small-Satellite-Mounted 256-Element Ka-Band CMOS Phased-Array Transmitter Achieving 63.8dBm EIRP Under 26.6W Power Consumption Using Single/Dual Circular Polarization Active Coupler.
ISSCC
Dongwon You, Xi Fu, Xiaolin Wang, Yuan Gao, Wenqian Wang, Jun Sakamaki, Hans Herdian, Sena Kato, Michihiro Ide, Yuncheng Zhang, Ashbir Aviat Fadila, Zheng Li, Chun Wang, Yun Wang, Jumpei Sudo, Makoto Higaki, Nahoka Kawaguchi, Masaya Nitta, Soichiro Inoue, Takashi Eishima, Takashi Tomura, Jian Pang, Hiroyuki Sakai, Kenichi Okada, Atsushi Shirane
2023 — conf
A Sub-THz Full-Duplex Phased-Array Transceiver with Self-Interference Cancellation and LO Feedthrough Suppression.
VLSI Technology and Circuits
Chun Wang, Ibrahim Abdo, Chenxin Liu, Carrel da Gomez, Hans Herdian, Wenqian Wang, Xi Fu, Dongwon You, Abanob Shehata, Sunghwan Park, Yun Wang, Jian Pang, Hiroyuki Sakai, Atsushi Shirane, Kenichi Okada