Kazuaki Kunihiro

According to our database, Kazuaki Kunihiro authored at least 44 papers between 2004 and 2026.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2026

A Power-Efficient K-Band Circular Polarized 256-Element CMOS Phased-Array Transmitter With Coupler-End Structure for LEO Satellite Terminal.

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

IEEE J. Solid State Circuits, May, 2026

A 142-164-GHz Phased-Array AiP Module With High-Power-Density and High-Efficiency Transceiver in 65-nm CMOS for 6G UE.

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

IEEE J. Solid State Circuits, April, 2026

A 52 Gb/s 8.9-dBm EIRP 300-GHz-Band Amplifier-Last Outphasing Transmitter With Path Mismatch Calibration in 65-nm CMOS.

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

IEEE J. Solid State Circuits, April, 2026

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.

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

Proceedings of the IEEE International Solid-State Circuits Conference, 2026

2025

CORDIC-Less Digital Polar Transmitter Architecture Based on Delta-Sigma Modulator.

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

IEEE J. Solid State Circuits, December, 2025

A Compact D-Band Phase Shifter With 0.1-Degree Phase Resolution and Ultra-Low Phase Error in 65-nm CMOS.

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

IEEE J. Solid State Circuits, October, 2025

A 640-Gb/s 4 × 4-MIMO D-Band CMOS Transceiver Chipset.

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

IEEE J. Solid State Circuits, April, 2025

A 160-Gb/s D-Band Bi-Directional CMOS Mixer Covering 112-170 GHz for 6G Transceivers.

Chenxin Liu, Yudai Yamazaki, Anyi Tian, Chun Wang, Hans Herdian, Abanob Shehata, Han Nie, Minzhe Tang, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada

IEEE Solid State Circuits Lett., 2025

A 2.5 dB noise figure 28 GHz current-reused noise-cancelling LNA with g_m-boosting in 65 nm CMOS for millimeter-wave MIMO applications.

Yi Zhang, Minzhe Tang, Dongfan Xu, Jian Pang, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada

IEICE Electron. Express, 2025

A LEO Satellite Mounted 256-Element 19 GHz CMOS Phased-Array Transmitter With On-Chip Amplitude and Phase Monitor.

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

IEEE Access, 2025

Experimental Testbed for Frequency-Division Multiplexed Joint Radar-Communication System Validation in D-Band Using a 65-nm CMOS Communication Transceiver.

Carrel da Gomez, Chenxin Liu, Hans Herdian, Hiroyuki Sakai, Kazuaki Kunihiro, Kenichi Okada

IEEE Access, 2025

5.6 A Power-Efficient CORDIC-Less Digital Polar Transmitter Using 1b DSM-Based PA Supporting 256-QAM.

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

Proceedings of the IEEE International Solid-State Circuits Conference, 2025

11.1 A 256-Element Ka-Band CMOS Phased-Array Receiver Using Switch-Type Quadrature-Hybrid-First Architecture for Small Satellite Constellations.

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

Proceedings of the IEEE International Solid-State Circuits Conference, 2025

A 4-Stream 8-Element Time-Division MIMO Phased-Array Receiver for 5G NR and Beyond Achieving 9.6Gbps Data Rate.

Yi Zhang, Minzhe Tang, Zheng Li, Dongfan Xu, Kazuaki Kunihiro, Hiroyuki Sakai, Atsushi Shirane, Kenichi Okada

Proceedings of the 30th Asia and South Pacific Design Automation Conference, 2025

A D-Band CMOS Transceiver Chipset Supporting 640Gb/s Date Rate with 4?4 Line-of-Sight MIMO.

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

Proceedings of the 30th Asia and South Pacific Design Automation Conference, 2025

2024

A 28GHz 4-Stream Time-Division MIMO Phased-Array Receiver Utilizing Nyquist-Rate Fast Beam Switching for 5G and Beyond.

Yi Zhang, Minzhe Tang, Jian Pang, Zheng Li, Dongfan Xu, Dingxin Xu, Yuncheng Zhang, Kazuaki Kunihiro, Hiroyuki Sakai, Atsushi Shirane, Kenichi Okada

Proceedings of the IEEE Symposium on VLSI Technology and Circuits 2024, 2024

A 640-Gb/s 4×4-MIMO D-Band CMOS Transceiver Chipset.

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

Proceedings of the IEEE Symposium on VLSI Technology and Circuits 2024, 2024

A Compact D-Band Phase Shifter with 0.1-degree Phase Resolution and 0.8-degree RMS Phase Error in 65 nm CMOS.

Takaya Uchino, Yudai Yamazaki, Sunghwan Park, Chenxin Liu, Anyi Tian, Abanob Shehata, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada

Proceedings of the IEEE Asian Solid-State Circuits Conference, 2024

35-60GHz Switchless IF Bi-Directional Amplifier Using 65nm CMOS for 300GHz-Band Transceivers.

Abanob Shehata, Hans Herdian, Chun Wang, Chenxin Liu, Kazuaki Kunihiro, Hiroyuki Sakai, Atsushi Shirane, Kenichi Okada

Proceedings of the IEEE Asian Solid-State Circuits Conference, 2024

2023

Radio-over-Fiber System with 1-Bit Outphasing Modulation for 5G/6G Indoor Wireless Communication.

Yuma Kase, Shinichi Hori, Naoki Oshima, Kazuaki Kunihiro

IEICE Trans. Electron., July, 2023

A 39-GHz CMOS Bidirectional Doherty Phased- Array Beamformer Using Shared-LUT DPD With Inter-Element Mismatch Compensation Technique for 5G Base Station.

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

IEEE J. Solid State Circuits, 2023

A D-Band Sub-Harmonically Pumped Mixer with High LO Suppression Using 250-nm InP DHBT P-N Junction.

Shinji Hachiyama, Koki Tanji, Toshihide Kuwabara, Naoki Oshima, Kazuaki Kunihiro, Tomoya Kaneko

Proceedings of the IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium, 2023

2022

A 39-GHz CMOS Bi-Directional Doherty Phased-Array Beamformer Using Shared-LUT DPD with Inter-Element Mismatch Compensation Technique for 5G Base-Station.

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

Proceedings of the IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits 2022), 2022

Millimeter-Wave CMOS Phased-Array Transceivers for 5G and Beyond.

Kenichi Okada, Jian Pang, Atsushi Shirane, Zheng Li, Yi Zhang, Naoki Oshima, Shinichi Hori, Kazuaki Kunihiro

Proceedings of the 2022 IEEE 33rd Annual International Symposium on Personal, 2022

2021

A CMOS Dual-Polarized Phased-Array Beamformer Utilizing Cross-Polarization Leakage Cancellation for 5G MIMO Systems.

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

IEEE J. Solid State Circuits, 2021

A Fast-Beam-Switching 28-GHz Phased-Array Transceiver Supporting Cross-Polarization Leakage Self-Cancellation.

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

Proceedings of the 2021 Symposium on VLSI Circuits, Kyoto, Japan, June 13-19, 2021, 2021

Radio-over-Fiber Systems with 1-bit Digital Modulation for 5G/6G Indoor Wireless Communication.

Shinichi Hori, Yuma Kase, Naoki Oshima, Kazuaki Kunihiro

Proceedings of the 2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS), 2021

2020

A 39-GHz 64-Element Phased-Array Transceiver With Built-In Phase and Amplitude Calibrations for Large-Array 5G NR in 65-nm CMOS.

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

IEEE J. Solid State Circuits, 2020

A 28-GHz CMOS Phased-Array Beamformer Utilizing Neutralized Bi-Directional Technique Supporting Dual-Polarized MIMO for 5G NR.

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

IEEE J. Solid State Circuits, 2020

A 28-GHz CMOS Phased-Array Beamformer Supporting Dual-Polarized MIMO with Cross-Polarization Leakage Cancellation.

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

Proceedings of the IEEE Symposium on VLSI Circuits, 2020

2019

A 28-GHz CMOS Phased-Array Transceiver Based on LO Phase-Shifting Architecture With Gain Invariant Phase Tuning for 5G New Radio.

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

IEEE J. Solid State Circuits, 2019

Foreword.

Kazuaki Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019

Learning-Based, Distributed Spectrum Observation System for Dynamic Spectrum Sharing in the 5G Era and Beyond.

Masaki Kitsunezuka, Kenta Tsukamoto, Jun Sakai, Taichi Ohtsuji, Kazuaki Kunihiro

IEICE Trans. Commun., 2019

A 28GHz CMOS Phased-Array Beamformer Utilizing Neutralized Bi-Directional Technique Supporting Dual-Polarized MIMO for 5G NR.

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

Proceedings of the IEEE International Solid- State Circuits Conference, 2019

2018

High Efficiency Power Amplifiers for Mobile Base Stations: Recent Trends and Future Prospects for 5G.

Kazuaki Kunihiro, Shinichi Hori, Tomoya Kaneko

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2018

Highly accurate radio environment mapping method based on transmitter localization and spatial interpolation in urban LoS/NLoS scenario.

Kenta Tsukamoto, Masaki Kitsunezuka, Kazuaki Kunihiro

Proceedings of the IEEE Topical Conference on Wireless Sensors and Sensor Networks, 2018

A 200 MHz Bandwidth GaAs Switch-Mode Supply Modulator.

Tatsuya Soma, Shinichi Hori, Kazuaki Kunihiro

Proceedings of the 2018 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS), 2018

2017

Learning-Based Distributed Radio-Environment Observation for Dynamic Spectrum Sharing.

Masaki Kitsunezuka, Kenta Tsukamoto, Naoki Oshima, Keiichi Motoi, Kazuaki Kunihiro

Proceedings of the 2017 IEEE Global Communications Conference, 2017

2016

Wireless D-band communication up to 60 Gbit/s with 64QAM using GaAs HEMT technology.

Ikuma Ando, Masaaki Tanio, Masaharu Ito, Toshihide Kuwabara, Tsunehisa Marumoto, Kazuaki Kunihiro

Proceedings of the 2016 IEEE Radio and Wireless Symposium, 2016

2013

RF and signal processing technologies for 4G mobile networks.

Shingo Yamanouchi, Kazuaki Kunihiro, Shinichi Hori, Masao Ikekawa, Naoki Nishi

Proceedings of the 2013 International Symposium on VLSI Design, Automation, and Test, 2013

Efficient spectrum utilization: Cognitive radio approach.

Masaki Kitsunezuka, Kazuaki Kunihiro

Proceedings of the 2013 IEEE Radio and Wireless Symposium, 2013

2012

A 30-MHz-2.4-GHz CMOS Receiver With Integrated RF Filter and Dynamic-Range-Scalable Energy Detector for Cognitive Radio Systems.

Masaki Kitsunezuka, Hiroshi Kodama, Naoki Oshima, Kazuaki Kunihiro, Tadashi Maeda, Muneo Fukaishi

IEEE J. Solid State Circuits, 2012

2006

OFDM Error Vector Magnitude Distortion Analysis.

Shingo Yamanouchi, Kazuaki Kunihiro, Hikaru Hida

IEICE Trans. Electron., 2006

2004

An efficient algorithm for simulating error vector magnitude in nonlinear OFDM amplifiers.

Shingo Yamanouchi, Kazuaki Kunihiro, Hikaru Hida

Proceedings of the IEEE 2004 Custom Integrated Circuits Conference, 2004