Akifumi Kasamatsu

33 papers Journal 17Unranked 16
YearRankTypeTitle / Venue / Authors
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
2025 J jnl
A 300-GHz-Band 36-Gb/s Scalable 2-D Phased-Array CMOS Double Superheterodyne Receiver.
IEEE Solid State Circuits Lett.
Satoshi Tanaka, Shinsuke Hara, Kyoya Takano, Akifumi Kasamatsu, Yoshiki Sugimoto, Kunio Sakakibara, Shunichi Kubo, Takeshi Yoshida, Shuhei Amakawa, Minoru Fujishima
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 — 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 — conf
Design of an Analog Integrated Circuit Solving the Two-Armed Bandit Problem in 180-nm CMOS.
AICAS
Kohei Mori, Kazuyuki Wada, Kawori Sekine, Shinsuke Hara, Satoru Tanoi, Akifumi Kasamatsu
2024 — conf
25.9-Gb/s 259-GHz Phased-Array CMOS Receiver Module with 28° Steering Range.
RWS
Shinsuke Hara, Mohamed H. Mubarak, Akifumi Kasamatsu, Yoshiki Sugimoto, Kunio Sakakibara, Kyoya Takano, Takeshi Yoshida, Shuhei Amakawa, Minoru Fujishima
2024 — conf
A 300-GHz-Band 36-Gb/s Scalable 2x2 2D Phased-Array CMOS Receiver.
A-SSCC
Satoshi Tanaka, Shinsuke Hara, Kyoya Takano, Akifumi Kasamatsu, Yoshiki Sugimoto, Kunio Sakakibara, Shunichi Kubo, Takeshi Yoshida, Shuhei Amakawa, Minoru Fujishima
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
2023 — conf
39 - 67 GHz CMOS Multistage Power Amplifier With Two-Way Power Stage.
ICICDT
Sho Okii, Shinsuke Hara, Akifumi Kasamatsu, Yohtaro Umeda, Kyoya Takano
2023 — conf
A 2D Beam-Steerable 252-285-GHz 25.8-Gbit/s CMOS Receiver Module.
A-SSCC
Takeshi Yoshida, Shinsuke Hara, Tatsuo Hagino, Mohamed H. Mubarak, Akifumi Kasamatsu, Kyoya Takano, Yoshiki Sugimoto, Kunio Sakakibara, Shuhei Amakawa, Minoru Fujishima
2023 J jnl
Evaluation of Transmission Characteristics of 120-GHz-Band Close-Proximity Wireless Links Using Split-Ring-Resonator Absorber Integrated Planar Slot Antenna.
IEICE Trans. Electron.
Akihiko Hirata, Tubasa Saijo, Yuma Kawamoto, Tadao Nagatsuma, Issei Watanabe, Norihiko Sekine, Akifumi Kasamatsu
2022 J jnl
A 76-Gbit/s 265-GHz CMOS Receiver With WR-3.4 Waveguide Interface.
IEEE J. Solid State Circuits
Shinsuke Hara, Ruibing Dong, Sangyeop Lee, Kyoya Takano, Naoya Toshida, Akifumi Kasamatsu, Kunio Sakakibara, Takeshi Yoshida, Shuhei Amakawa, Minoru Fujishima
2021 J jnl
300-GHz-Band OFDM Video Transmission with CMOS TX/RX Modules and 40dBi Cassegrain Antenna toward 6G.
IEICE Trans. Electron.
Yohei Morishita, Sangyeop Lee, Toshihiro Teraoka, Ruibing Dong, Yuichi Kashino, Hitoshi Asano, Shinsuke Hara, Kyoya Takano, Kosuke Katayama, Takenori Sakamoto, Naganori Shirakata, Koji Takinami, Kazuaki Takahashi, Akifumi Kasamatsu, Takeshi Yoshida, Shuhei Amakawa, Minoru Fujishima
2021 — conf
A 76-Gbit/s 265-GHz CMOS Receiver.
A-SSCC
Shinsuke Hara, Ruibing Dong, Sangyeop Lee, Kyoya Takano, Naoya Toshida, Satoru Tanoi, Tatsuo Hagino, Mohamed H. Mubarak, Norihiko Sekine, Issei Watanabe, Akifumi Kasamatsu, Kunio Sakakibara, Shunichi Kubo, Satoshi Miura, Yohtaro Umeda, Takeshi Yoshida, Shuhei Amakawa, Minoru Fujishima
2021 J jnl
Control of 120-GHz-Band Split Ring Resonator Filter by Coupling Lattice Pattern Substrate.
IEICE Trans. Electron.
Koichiro Itakura, Akihiko Hirata, Masato Sonoda, Taiki Higashimoto, Tadao Nagatsuma, Takashi Tomura, Jiro Hirokawa, Norihiko Sekine, Issei Watanabe, Akifumi Kasamatsu
2021 J jnl
Transmission Characteristics Control of 120 GHz-Band Bandstop Filter by Coupling Alignment-Free Lattice Pattern.
IEICE Trans. Electron.
Akihiko Hirata, Koichiro Itakura, Taiki Higashimoto, Yuta Uemura, Tadao Nagatsuma, Takashi Tomura, Jiro Hirokawa, Norihiko Sekine, Issei Watanabe, Akifumi Kasamatsu
2019 J jnl
An 80-Gb/s 300-GHz-Band Single-Chip CMOS Transceiver.
IEEE J. Solid State Circuits
Sangyeop Lee, Shinsuke Hara, Takeshi Yoshida, Shuhei Amakawa, Ruibing Dong, Akifumi Kasamatsu, Junji Sato, Minoru Fujishima
2019 — conf
An 80Gb/s 300GHz-Band Single-Chip CMOS Transceiver.
ISSCC
Sangyeop Lee, Ruibing Dong, Takeshi Yoshida, Shuhei Amakawa, Shinsuke Hara, Akifumi Kasamatsu, Junji Sato, Minoru Fujishima
2018 — conf
300-GHz CMOS transmitter module with built-in waveguide transition on a multilayered glass epoxy PCB.
RWS
Kyoya Takano, Kosuke Katayama, Shinsuke Hara, Ruibing Dong, Koichi Mizuno, Kazuaki Takahashi, Akifumi Kasamatsu, Takeshi Yoshida, Shuhei Amakawa, Minoru Fujishima
2018 J jnl
32-Gbit/s CMOS Receivers in 300-GHz Band.
IEICE Trans. Electron.
Shinsuke Hara, Kosuke Katayama, Kyoya Takano, Ruibing Dong, Issei Watanabe, Norihiko Sekine, Akifumi Kasamatsu, Takeshi Yoshida, Shuhei Amakawa, Minoru Fujishima
2018 — conf
Frequency Up-Conversion of Data-Carrying Optical Vortex for Optical Fibre to Optical Wireless Communications Interface.
ECOC
Guo-Wei Lu, Junichi Hamazaki, Keizo Inagaki, T. Kishimoto, Yuichi Ogawa, Norihiko Sekine, Akifumi Kasamatsu, Naokatsu Yamamoto, S. Yamaguchi, Iwao Hosako
2017 — conf
17.9 A 105Gb/s 300GHz CMOS transmitter.
ISSCC
Kyoya Takano, Shuhei Amakawa, Kosuke Katayama, Shinsuke Hara, Ruibing Dong, Akifumi Kasamatsu, Iwao Hosako, Koichi Mizuno, Kazuaki Takahashi, Takeshi Yoshida, Minoru Fujishima
2017 J jnl
A - 244-dB FOM High-Frequency Piezoelectric Resonator-Based Cascaded Fractional-N PLL With Sub-ppb-Order Channel-Adjusting Technique.
IEEE J. Solid State Circuits
Sho Ikeda, Hiroyuki Ito, Akifumi Kasamatsu, Yosuke Ishikawa, Takayoshi Obara, Naoki Noguchi, Koji Kamisuki, Yao Jiyang, Shinsuke Hara, Ruibing Dong, Shiro Dosho, Noboru Ishihara, Kazuya Masu
2017 — conf
Design of high-frequency piezoelectric resonator-based cascaded fractional-N PLL with sub-ppb-order channel adjusting technique.
ASP-DAC
Yosuke Ishikawa, Sho Ikeda, Hiroyuki Ito, Akifumi Kasamatsu, Takayoshi Obara, Naoki Noguchi, Koji Kamisuki, Yao Jiyang, Shinsuke Hara, Ruibing Dong, Shiro Dosho, Noboru Ishihara, Kazuya Masu
2016 — conf
20.1 A 300GHz 40nm CMOS transmitter with 32-QAM 17.5Gb/s/ch capability over 6 channels.
ISSCC
Kosuke Katayama, Kyoya Takano, Shuhei Amakawa, Shinsuke Hara, Akifumi Kasamatsu, Koichi Mizuno, Kazuaki Takahashi, Takeshi Yoshida, Minoru Fujishima
2016 J jnl
A 300 GHz CMOS Transmitter With 32-QAM 17.5 Gb/s/ch Capability Over Six Channels.
IEEE J. Solid State Circuits
Kosuke Katayama, Kyoya Takano, Shuhei Amakawa, Shinsuke Hara, Akifumi Kasamatsu, Koichi Mizuno, Kazuaki Takahashi, Takeshi Yoshida, Minoru Fujishima
2016 — conf
An 8.865-GHz -244dB-FOM high-frequency piezoelectric resonator-based cascaded fractional-N PLL with sub-ppb-order channel adjusting technique.
VLSI Circuits
Sho Ikeda, Hiroyuki Ito, Akifumi Kasamatsu, Yosuke Ishikawa, Takayoshi Obara, Naoki Noguchi, Koji Kamisuki, Yao Jiyang, Shinsuke Hara, Ruibing Dong, Shiro Dosho, Noboru Ishihara, Kazuya Masu
2016 J jnl
Compact 141-GHz Differential Amplifier with 20-dB Peak Gain and 22-GHz 3-dB Bandwidth.
IEICE Trans. Electron.
Shinsuke Hara, Kosuke Katayama, Kyoya Takano, Issei Watanabe, Norihiko Sekine, Akifumi Kasamatsu, Takeshi Yoshida, Shuhei Amakawa, Minoru Fujishima
2016 J jnl
Ultrashort optical pulse source using Mach-Zehnder-modulator-based flat comb generator.
Nano Commun. Networks
Isao Morohashi, Takahide Sakamoto, Norihiko Sekine, Akifumi Kasamatsu, Iwao Hosako
2015 J jnl
Generation of Arbitrarily Patterned Pulse Trains in the THz Range by Spectral Synthesis of Optical Combs.
IEICE Trans. Electron.
Isao Morohashi, Takahide Sakamoto, Norihiko Sekine, Tetsuya Kawanishi, Akifumi Kasamatsu, Iwao Hosako
2015 J jnl
Impact of Mode Filtering on the Performance of Femtosecond Pulse Amplification in a Large Mode Area Fiber.
IEICE Trans. Electron.
Junichi Hamazaki, Housei Mogi, Norihiko Sekine, Satoshi Ashihara, Akifumi Kasamatsu, Iwao Hosako
2013 — conf
On Neuro-inspired Wireless Sensor Networks.
UIC/ATC
Ferdinand Peper, Naoki Wakamiya, Akifumi Kasamatsu, Shukichi Tanaka, Kenji Leibnitz, Jun-nosuke Teramae, Katsuyuki Kasai, Akira Otomo
2005 J jnl
RF-CMOS Implementation of UWB Transceivers and Its Application to Video Transmission.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Akifumi Kasamatsu, Akio Tanaka, Hiroshi Kodama, Satoru Tanoi, Yasuhiro Kaizaki, Juichi Nakada, Masami Hagio, Yoshiaki Kuraishi, Keren Li, Hitoshi Utagawa, Toshiaki Matsui, Ryuji Kohno