Kazuaki Kunihiro

44 papers B 2Journal 21Unranked 21

Year	Rank	Type	Title / 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`	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
2023	J	`jnl`	A 39-GHz CMOS Bidirectional Doherty Phased- Array Beamformer Using Shared-LUT DPD With Inter-Element Mismatch Compensation Technique for 5G Base Station. IEEE J. Solid State Circuits Zheng Li, Jian Pang, Yi Zhang, Yudai Yamazaki, Qiaoyu Wang, Peng Luo, Weichu Chen, Yijing Liao, Minzhe Tang, Yun Wang, Xi Fu, Dongwon You, Naoki Oshima, Shinichi Hori, Jeehoon Park, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada
2023	—	`conf`	A D-Band Sub-Harmonically Pumped Mixer with High LO Suppression Using 250-nm InP DHBT P-N Junction. BCICTS Shinji Hachiyama, Koki Tanji, Toshihide Kuwabara, Naoki Oshima, Kazuaki Kunihiro, Tomoya Kaneko
2023	J	`jnl`	Radio-over-Fiber System with 1-Bit Outphasing Modulation for 5G/6G Indoor Wireless Communication. IEICE Trans. Electron. Yuma Kase, Shinichi Hori, Naoki Oshima, Kazuaki Kunihiro
2022	—	`conf`	A 39-GHz CMOS Bi-Directional Doherty Phased-Array Beamformer Using Shared-LUT DPD with Inter-Element Mismatch Compensation Technique for 5G Base-Station. VLSI Technology and Circuits Zheng Li, Jian Pang, Yi Zhang, Yudai Yamazaki, Qiaoyu Wang, Peng Luo, Weichu Chen, Yijing Liao, Minzhe Tang, Zhengyan Guo, Yun Wang, Xi Fu, Dongwon You, Naoki Oshima, Shinichi Hori, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada
2022	B	`conf`	Millimeter-Wave CMOS Phased-Array Transceivers for 5G and Beyond. PIMRC Kenichi Okada, Jian Pang, Atsushi Shirane, Zheng Li, Yi Zhang, Naoki Oshima, Shinichi Hori, Kazuaki Kunihiro
2021	J	`jnl`	A CMOS Dual-Polarized Phased-Array Beamformer Utilizing Cross-Polarization Leakage Cancellation for 5G MIMO Systems. IEEE J. Solid State Circuits Jian Pang, Zheng Li, Xueting Luo, Joshua Alvin, Rattanan Saengchan, Ashbir Aviat Fadila, Kiyoshi Yanagisawa, Yi Zhang, Zixin Chen, Zhongliang Huang, Xiaofan Gu, Rui Wu, Yun Wang, Dongwon You, Bangan Liu, Zheng Sun, Yuncheng Zhang, Hongye Huang, Naoki Oshima, Keiichi Motoi, Shinichi Hori, Kazuaki Kunihiro, Tomoya Kaneko, Atsushi Shirane, Kenichi Okada
2021	—	`conf`	A Fast-Beam-Switching 28-GHz Phased-Array Transceiver Supporting Cross-Polarization Leakage Self-Cancellation. VLSI Circuits Jian Pang, Zheng Li, Xueting Luo, Joshua Alvin, Kiyoshi Yanagisawa, Yi Zhang, Zixin Chen, Zhongliang Huang, Xiaofan Gu, Weichu Chen, Yun Wang, Dongwon You, Zheng Sun, Yuncheng Zhang, Hongye Huang, Naoki Oshima, Keiichi Motoi, Shinichi Hori, Kazuaki Kunihiro, Tomoya Kaneko, Atsushi Shirane, Kenichi Okada
2021	—	`conf`	Radio-over-Fiber Systems with 1-bit Digital Modulation for 5G/6G Indoor Wireless Communication. APWCS Shinichi Hori, Yuma Kase, Naoki Oshima, Kazuaki Kunihiro
2020	—	`conf`	A 28-GHz CMOS Phased-Array Beamformer Supporting Dual-Polarized MIMO with Cross-Polarization Leakage Cancellation. VLSI Circuits Jian Pang, Zheng Li, Xueting Luo, Joshua Alvin, Rattanan Saengchan, Ashbir Aviat Fadila, Kiyoshi Yanagisawa, Yi Zhang, Zixin Chen, Zhongliang Huang, Xiaofan Gu, Rui Wu, Yun Wang, Dongwon You, Bangan Liu, Zheng Sun, Yucheng Zhang, Hongye Huang, Naoki Oshima, Keiichi Motoi, Shinichi Hori, Kazuaki Kunihiro, Tomoya Kaneko, Atsushi Shirane, Kenichi Okada
2020	J	`jnl`	A 28-GHz CMOS Phased-Array Beamformer Utilizing Neutralized Bi-Directional Technique Supporting Dual-Polarized MIMO for 5G NR. IEEE J. Solid State Circuits Jian Pang, Zheng Li, Ryo Kubozoe, Xueting Luo, Rui Wu, Yun Wang, Dongwon You, Ashbir Aviat Fadila, Rattanan Saengchan, Takeshi Nakamura, Joshua Alvin, Daiki Matsumoto, Bangan Liu, Aravind Tharayil Narayanan, Junjun Qiu, Hanli Liu, Zheng Sun, Hongye Huang, Korkut Kaan Tokgoz, Keiichi Motoi, Naoki Oshima, Shinichi Hori, Kazuaki Kunihiro, Tomoya Kaneko, Atsushi Shirane, Kenichi Okada
2020	J	`jnl`	A 39-GHz 64-Element Phased-Array Transceiver With Built-In Phase and Amplitude Calibrations for Large-Array 5G NR in 65-nm CMOS. IEEE J. Solid State Circuits Yun Wang, Rui Wu, Jian Pang, Dongwon You, Ashbir Aviat Fadila, Rattanan Saengchan, Xi Fu, Daiki Matsumoto, Takeshi Nakamura, Ryo Kubozoe, Masaru Kawabuchi, Bangan Liu, Haosheng Zhang, Junjun Qiu, Hanli Liu, Naoki Oshima, Keiichi Motoi, Shinichi Hori, Kazuaki Kunihiro, Tomoya Kaneko, Atsushi Shirane, Kenichi Okada
2019	J	`jnl`	A 28-GHz CMOS Phased-Array Transceiver Based on LO Phase-Shifting Architecture With Gain Invariant Phase Tuning for 5G New Radio. IEEE J. Solid State Circuits Jian Pang, Rui Wu, Yun Wang, Masato Dome, Hisashi Kato, Hongye Huang, Aravind Tharayil Narayanan, Hanli Liu, Bangan Liu, Takeshi Nakamura, Takuya Fujimura, Masaru Kawabuchi, Ryo Kubozoe, Tsuyoshi Miura, Daiki Matsumoto, Zheng Li, Naoki Oshima, Keiichi Motoi, Shinichi Hori, Kazuaki Kunihiro, Tomoya Kaneko, Atsushi Shirane, Kenichi Okada
2019	—	`conf`	A 28GHz CMOS Phased-Array Beamformer Utilizing Neutralized Bi-Directional Technique Supporting Dual-Polarized MIMO for 5G NR. ISSCC Jian Pang, Zheng Li, Ryo Kubozoe, Xueting Luo, Rui Wu, Yun Wang, Dongwon You, Ashbir Aviat Fadila, Rattanan Saengchan, Takeshi Nakamura, Joshua Alvin, Daiki Matsumoto, Aravind Tharayil Narayanan, Bangan Liu, Junjun Qiu, Hanli Liu, Zheng Sun, Hongye Huang, Korkut Kaan Tokgoz, Keiichi Motoi, Naoki Oshima, Shinichi Hori, Kazuaki Kunihiro, Tomoya Kaneko, Atsushi Shirane, Kenichi Okada
2019	J	`jnl`	Foreword. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. Kazuaki Kunihiro
2019	J	`jnl`	Learning-Based, Distributed Spectrum Observation System for Dynamic Spectrum Sharing in the 5G Era and Beyond. IEICE Trans. Commun. Masaki Kitsunezuka, Kenta Tsukamoto, Jun Sakai, Taichi Ohtsuji, Kazuaki Kunihiro
2018	—	`conf`	A 200 MHz Bandwidth GaAs Switch-Mode Supply Modulator. BCICTS Tatsuya Soma, Shinichi Hori, Kazuaki Kunihiro
2018	J	`jnl`	High Efficiency Power Amplifiers for Mobile Base Stations: Recent Trends and Future Prospects for 5G. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. Kazuaki Kunihiro, Shinichi Hori, Tomoya Kaneko
2018	—	`conf`	Highly accurate radio environment mapping method based on transmitter localization and spatial interpolation in urban LoS/NLoS scenario. WiSNet Kenta Tsukamoto, Masaki Kitsunezuka, Kazuaki Kunihiro
2017	B	`conf`	Learning-Based Distributed Radio-Environment Observation for Dynamic Spectrum Sharing. GLOBECOM Masaki Kitsunezuka, Kenta Tsukamoto, Naoki Oshima, Keiichi Motoi, Kazuaki Kunihiro
2016	—	`conf`	Wireless D-band communication up to 60 Gbit/s with 64QAM using GaAs HEMT technology. RWS Ikuma Ando, Masaaki Tanio, Masaharu Ito, Toshihide Kuwabara, Tsunehisa Marumoto, Kazuaki Kunihiro
2013	—	`conf`	Efficient spectrum utilization: Cognitive radio approach. RWS Masaki Kitsunezuka, Kazuaki Kunihiro
2013	—	`conf`	RF and signal processing technologies for 4G mobile networks. VLSI-DAT Shingo Yamanouchi, Kazuaki Kunihiro, Shinichi Hori, Masao Ikekawa, Naoki Nishi
2012	J	`jnl`	A 30-MHz-2.4-GHz CMOS Receiver With Integrated RF Filter and Dynamic-Range-Scalable Energy Detector for Cognitive Radio Systems. IEEE J. Solid State Circuits Masaki Kitsunezuka, Hiroshi Kodama, Naoki Oshima, Kazuaki Kunihiro, Tadashi Maeda, Muneo Fukaishi
2006	J	`jnl`	OFDM Error Vector Magnitude Distortion Analysis. IEICE Trans. Electron. Shingo Yamanouchi, Kazuaki Kunihiro, Hikaru Hida
2004	—	`conf`	An efficient algorithm for simulating error vector magnitude in nonlinear OFDM amplifiers. CICC Shingo Yamanouchi, Kazuaki Kunihiro, Hikaru Hida