COMMISSION C: Radiocommunication
Processing(November 2017 – October 2020)

SystemsandSignalEdited by Makoto Taromaru (Fukuoka University)
1. Summary
The URSI-C subcommittee held scientific workshops 12 times in this triennium.
Though we had usually held four times a year, we could not hold workshops in 2020 due
to COVID-19 pandemic. Nevertheless, we think that the activity in the first two years
was relatively high among the URSI subcommittees in Japan, as is written in thefollowing section “Activity Report.”
The study or research activities of this radio-scientific field has been still high in Japanespecially to improve channel capacity of radio links and to develop the next generation
radiocommunication systems [1]-[54], what is said “5G” or “Wi-Fi 6.” There is no doubtthat the most attractive issue in the field of commission C is 5G and the beyond 5G
cellular systems; a lot of papers related to this field were published [35]-[54].
Studies on antennas and propagations including MIMO [1]-[15] are still active because
this field is one of the important issues for the high-capacity radio systems, and in-band
full duplex transmission systems are still being studied well to improve the frequency
resource usage twice.
OAM: orbital angular momentum transmission is one of the new, interesting, andremarkable issues in the fields of array antenna, propagation, MIMO [18]-[26]. In thefield of microwave circuit, we can find quite a few literatures on mm-wave including
28GHz for 5G or ultra-high speed radio communications [16],[17], and semiconductor
devices for those frequency range as well as for Terahertz wave are actively studied [55][64].
Moreover, WPT: wireless power transmission-related studies are very active in Japan
where we can find that both of near field and far field transmissions are being researchedand developed [27]-[34].

2. Activity Report
The scientific committee of URSI-C in Japan had usually held scientificconferences/workshops four times a year before COVID-19 pandemic began. From 20171

to 2020 during the 24th term, including the last workshop held by 23rd committee 1, we
had the scientific conferences eight times as the followings. All the speakers are invitedby the committee. These are open workshops for any people and the registration fee is
free every time.
The 12th scientific workshop of the 23rd URSI-C in Japan
 Session title: “Recent trend of Antenna, Propagation, System, and Signal
Processing Technologies toward to future”
 Date/time: 09:00 - 11:35, 22nd March 2018
 Venue: Tokyo Denki University (Adachi ward, Tokyo pref.) Listed attendees: 28 persons
 Presentation:“The status on standardization for channel models used in the 5G,” by Koshiro Kitao(NTT Docomo）, and 4 totally five invited talks.
The 1st scientific workshop of the 24th URSI-C in Japan
 Session title: “Wireless Access TechnologiesTowards the 5th Generation Mobile
Communication”
 Date/time: 14:00 - 17:00, June 29th, 2018
 Venue: 16th Building, Yagami Campus (Yokohama city, Kanagawa pref.) Listed attendees: 28 persons
 Presentations:"Docomo's 5G Trial for 5G Realization" by Dr. Satoshi Suyama (NTT Docomo） and 3
totally four presentations.
The 2nd scientific workshop of the 24th URSI-C in Japan
 Session title: "OAM radio transmission technologies" Date/time: 14:00 - 17:00, October 12th, 2018
 Venue: Setsunan University, Neyagawa-shi, Osaka Pref.
 Listed attendees: 22 persons
 Presentations:"Analog OAM Multiplexing and Related Technologies" by Prof. Atsushi Sanada(Osaka University), and two totally three presentations.

1

Each scientific committee of URSI in Japan is usually renewed on 1st April so thisworkshop was steered by the previous 23rd committee.
2

The 3rd scientific workshop of the 24th URSI-C in Japan
 Session title: "Millimeter / Terahertz Wave Devices and Circuits their Applications
for Ultra-High Speed Wireless Communication Systems"
 Date/time: 13:30 - 17:20, December 14th, 2018
 Venue: Room "Hourai", Hotel Ryokusui-Tei in Akiu-Onsen (Sendai, Miyagi pref.) Listed attendees: 18 persons
 Presentations:"Advances in terahertz wireless communication technology utilizing resonanttunneling diodes" by Prof. Safumi Suzuki (Tokyo Institute of Technology), and three
totally four presentations.
The 4th scientific workshop of the 24th URSI-C in Japan
 Session title: "Wireless Access Technologies Beyond the 5th Generation Mobile
Communications" Date/time: 13:20 - 17:30, March 1st, 2019
 Venue: Room "the meeting room in the KKR Kinosaki-Genbu", Kinosaki-cho,
Toyooka, Hyogo
 Listed attendees: 19 persons
 Presentations:"IoT standardization activity in 3GPP" by Mr. Satoshi Nagata (NTT DOCOMO, Inc. ),and four totally five invited talks.
The 5th scientific workshop of the 24th URSI-C in Japan

Session title: "Current status and issues of antenna propagation technology in V2X
communications"

Date/time: 13:45—17:25, May 31st, 2019



Venue: Room "The meeting room 1 in the Tenbusu Naha" (Naha, Okinawa, Japan)



Listed attendees: 20 persons

Presentations:"Antenna configuration methods on V2V communications for Platooning" by
Mr.Kazuma Tomimoto ( Softbank Corp. ), and three totally four presentations.
The 6th scientific workshop of the 24th URSI-C in Japan

Session title: "Progress of Millimeter Wave Devices for Wireless Communications"

Date/time: 14:00—17:50, September 27th, 20193

Venue: Presentation Room, Shin-Kawasaki Technology Square, Fujitsu Limited(Saiwai-ku, Kawasaki, Kanagawa, Japan)



Listed attendees: 39 persons

Presentations:"Recent trends in GaN HEMTs for improved performance" by Prof. Masaaki Kuzuhara(Fukui University), and three totally four presentations.
The 7th scientific workshop of the 24th URSI-C in Japan

Session title: "Semiconductor device technologies supporting high-speed bigcapacity radio communications beyond 5G"

Date/time:

13:30—17:25, December 6th, 2019



Venue: Room No. 23, EE-Bldg. 1F, Faculty of Eng., Koorimoto Campus, Kagoshima
University, Kagoshima.

Listed attendees:Presentations:

20 persons"Advances and future trends in 5G mobile communications systems" by Prof. Fumiyuki
Adachi (Tohoku University), and three totally four presentations.
Note that all the workshops planned after Jan. 2020 were cancelled due to COVID-19
disaster.
The activities in details are available more precisely at our web site, https://www.ursinet.org/jp/Commission-C/24th/index-en.shtml .

3. References
AP
・伝搬関連

[1] Koyo Tategami, Mitoshi Fujimoto, Koshiro Kitao, Minoru Inomata, Satoshi Suyama,
Yasuhiro Oda, “Propagation delay time estimation by neural network using urban
environment parameters,” IEICE Communications Express, vol.X9-B, no.9, pp.573-579,
Dec. 2020.

[2] Koichi Serizawa, Kazuma Tomimoto, Masayuki Miyashita, “Doppler spectrum of V2V
direct communications for platooning, Ryo Yamaguchi,” IEICE Transaction oncommunications, vol.J103-B, no.11, pp.515-527.

[3] R. Taniguchi and K. Nishimori, “Comparison of SNR and channel capacity with micro
and milli-meter wave bands based on outdoor propagation measurement,” IEICE
Communications Express, Vol.9, No.6, 153-158, June, 2020.
4[4] Naozumi Ando, Kazuma Tomimoto, Ryo Yamaguchi, Mitoshi Fujimoto, “Radio wave
propagation simulation considering Doppler shift caused by other vehicles,” IEICE
Communications Express vol. 9, no. 2, pp.31-35, Feb. 2020.

[5] Saki Uemura; Kentaro Nishimori; Ryotaro Taniguchi; Minoru Inomata; Koshiro Kitao;
Tetsuro Imai; Satoshi Suyama; Hironori Ishikawa; Yasuhiro Oda;, “Direction-of-Arrival
Estimation With Circular Array Using Compressed Sensing in 20 GHz Band,” IEEE
Antennas and Wireless Propagation Letters, vol. 20, no. 5, pp. 703-707, May 2021, doi:
10.1109/LAWP.2021.3060630.
MIMO, Array antenna signal processing[6] Nobuyoshi Kikuma, Kousuke Yonezu, Kunio Sakakibara, “Performance analysis of block
MSN algorithm with pseudo-noise control in multi-user MIMO system,” IEICE
Transaction on communications, vol.E102-B, no.2 pp.224-232.

[7] Jun Goto, Kazunari Kihira, Toru Takahashi, Masataka Ohtsuka, Hiroaki Miyashita, “A
study on modulation method for transmission system using phased array antennas,”
IEICE Transaction on communications, vol.J101-B, no.2 pp.187-193.

[8] T. Tomura, D.-H. Kim, M. Wakasa, Y. Sunaguchi, J. Hirokawa, and K. Nishimori, “A 20GHz-Band 64×64 Hollow Waveguide Two-Dimensional Butler Matrix,” IEEE Access,vol. 7, pp. 164080-164088, Aug. 2020.

[9] N. Matsumura, K. Nishimori, R. Taniguchi, T. Hiraguri, T. Tomura and J. Hirokawa,“Novel Unmanned Aerial Vehicle Based Line-of-Sight MIMO Configuration
Independent of Transmitted Distance Using Millimeter Wave,” IEEE Access, vol. 1, pp.
2169-3536, Jan. 2020.

[10] N. Kikuma, K. Nishimori and T. Hiraguri, “Effect of User Antenna Selection on Block
Beamforming Algorithms, ” IEICE Trans. Commun. Vol.E101-B, No. 7, pp.1523-1535,
2018.
novel antenna[11] Shuntaro Omi, Toru Uno, Takuji Arima “Single-Cut Near-Field Far-Field
Transformation Technique Employing Two-Dimensional Plane-Wave Expansion” IEEE
Antennas and Wireless Propagation Letters, vol. 17, no. 8, pp. 1538-1541, Aug. 2018.
doi: 10.1109/LAWP.2018.2853260[12] Suguru KOJIMA, Takuji ARIMA, and Toru UNO, “Low-profile Supergain Antenna
Composed of Asymmetric Dipole Elements Backed by Planar Reflector for IoT
Applications,” IEICE Transactions on Communications, 2019, Volume E102.B, Issue 4,
Pages 884-890, April, 20195

[13] Toru Uno, Takuji Arima, Akihide Kurahara, “FDTD modeling of nonperiodic antenna
located above periodic metasurface using surface impedance boundary condition”, EPJ
Appl. Metamat. 6, 17 (2019)[14] R. Yamaguchi, “Fundamental characteristics of combined tilting base station antenna by
field trials”, IEICE Communications Express, Vol. 8, Issue 12, pp.578-583, 2019[15] Y.Abe, M. Ogura, H. Tshuji, A. Miura, S. Adachi, “Publication:

Resource and Network

Management Framework for a Large-Scale Satellite Communications System”, IEICE
Transaction on communications, vol.J103-A, no.2 pp.492-501, 2020

MW・28GHz Chips[16] Toshihiro Shimura, Takenori Ohshima, Yoji Ohashi,“A 28-GHz Phased-array Receiverwith an On-chip BIST Function by using a Shielded Symmetrical Signal Distributor”,
IEEE European Microwave Week, Conf. Dig. 49th 2019.

[17] Toshihiro Shimura, Takenori Ohshima, Shohei Ishikawa, Shunsuke Fujio, Kazuyuki
Ozaki, Hikaru Ishikawa, Kenichi Nishikawa, Masahiko Shimizu, Yoji Ohashi, “A 28-GHz
CMOS 2 × 4 Phased Array Chip with High-Precision Phase-Adjusting Function
Between Subarrays for Beam Multiplexing”, IEEE European Microwave Integrated
Circuit Conference, Conf. Dig. 13th 2018.
・OAM[18] Y. Shigeta, Atsushi Sanada, Atsushi Fukuda, Kunihiro Kawai, Hiroshi Okazaki,“Refelectionless Metalens

Collimating Multi-OAM Waves for Antenna Gain

Enhancement in Wireless Communication,” in Proceeding of 2018 Asia-PacificMicrowave Conference (APMC), Nov. 2018.

[19] Keita Kitagawa, Atsushi Sanada, Atsushi Fukuda, Hiroshi Okazaki, “Experimental
Investigation on Mode Isolation Enhancement for 28 GHz OAM Circular Antenna
Arrays by Dielectric Loading,” in Proceeding of 2020 IEEE International Symposium onRadio-Frequency Integration Technology (RFIT), Sept. 2020.

[20] Yudai Shigeta, Keita Kitagawa, Atsushi Sanada, Atsushi Fukuda, Kunihiro Kawai, Hiroshi
Okazaki, “A 28 GHz Interleaved Circular Antenna Array with Equal Gains and Wideband
Orthogonality for Analog OQAM Multiplexing,” in Proceeding of 2019 Asia-PacificMicrowave Conference (APMC), Dec. 2019.

[21] Keita Kitagawa, Yudai Shigeta, Atsushi Sanada, Atsushi Fukuda, Hiroshi Okazaki,
Kunihiro Kawai, “Characteristics of OQAM Beams from Discrete Circular Antenna
Arrays,” IEICE Transaction on Electronics, vol. J104-C, no. 7, pp. 202-209, July 2021.
6

(in Japanese)[22] Yasunori Yagi, Hirofumi Sasaki, Takayuki Yamada, Doohwan Lee, “200 Gb/s WirelessTransmission Using Dual-Polarized OAM-MIMO Multiplexing with Uniform Circular
Array on 28 GHz Band,” IEEE Antenna and Wireless Propagation Letters, vol. 20, no. 5,
pp. 833-837, Mar. 2021.

[23] Doohwan Lee, Hirofumi Sasaki, Hiroyuki Fukumoto, Ken Hiraga, Tadao Nakagawa,“Orbital Angular Momentum (OAM) Multiplexing: An Enabler of a New Era of WirelessCommunications,” IEICE Transactions on Communications, vol. E100-B, no. 7. pp.
1044-1063, July 2017.

[24] Masashi Hirabe, Ryuji Zenkyu, Hiroaki Miyamoto, Koji Ikuta, Eisaku Sasaki, “40 mTransmission on OAM Mode and Polarization Multiplexing in E-Band, “ in Proceedingof 2019 IEEE Globecom Workshops, Dec. 2019.

[25] Tung Nguyen, Masahi Hirabe, Hiroaki Miyamoto, Ryuji Zenkyu, Masaya Uchida, Eisaku
Sasaki, “An Experimental Study of High-Capacity Link using Orbital AngularMomentum Mode Multiplexing in E-Band,” in Proceeding of 2018 International
Symposium on Antennas and Propagation (ISAP), Oct., 2018.

[26] Ryuji Zenkyu, Masashi Hirabe, Hiroaki Miyamoto, Koji Ikuta, Eisaku Sasaki, “InterMode Interference Caused by Antenna Swinging in OAM Mode Multiplexing,” inProceeding of 2020 International Symposium on Antennas and Propagation (ISAP), Jan.
2020.
・WPT related[27] Sei Mizojiri, Kengo Takagi, Kohei Shimamura, Shigeru Yokota, Masafunari Fukunarim
Yoshinori Tatematsu, “GaN Schottky Barrier Diode for Sub-Terahertz Rectenna,”
Wireless Power Week 2019:IEEE MTT-S Wireless Power Transfer Conference (WPTC)and IEEE PELS Workshop on Emerging Technologies: Wireless Power (WoW), 2019.

[28] Ayako Suzuki, Koshi Hamano, Hayata Shimizu, Hiroshi Okazaki, Yasunori Suzuki,
Kunihiro Kawai, Atsushi Fukuda, Kenjiro Nishikawa, “Wide Dynamic Range Rectifier
Circuit with Varactor Tuning Techniques,” Wireless Power Week 2019:IEEE MTT-S
Wireless Power Transfer Conference (WPTC) and IEEE PELS Workshop on Emerging
Technologies: Wireless Power (WoW), 2019.

[29] Masaki Ishii, Kosuke Yamanaka, Masahiro Sasaki, “Multiple FSK Data and Power
Transmission System using Magnetic Resonance Wireless Power Transfer,” WirelessPower Week 2019:IEEE MTT-S Wireless Power Transfer Conference (WPTC) andIEEE PELS Workshop on Emerging Technologies: Wireless Power (WoW), 2019.

[30] Bingcheng Ji, Katsuhiro Hata, Takehiro Imura, Yoichi Hori, Shuhei Shimada, Osamu
7

Kawasaki, “MPPT Control for PV based Wireless Power Transfer System in Lunar Roverby Secondary Side Converter,” Wireless Power Week 2019:IEEE MTT-S Wireless Power
Transfer Conference (WPTC) and IEEE PELS Workshop on Emerging Technologies:
Wireless Power (WoW), 2019.

[31] Isami Sato, Naoki Shinohara, “Study on Antennas for Wireless Power Transfer to In-Line
Inspection Robots”. Wireless Power Week 2019:IEEE MTT-S Wireless Power Transfer
Conference (WPTC) and IEEE PELS Workshop on Emerging Technologies: WirelessPower (WoW), 2019.

[32] Seishiro Kojima, Naoki Shinohara, “A New Circularly Polarized Antenna Suppressing
Surface Wave for Microwave Power Transmission”, Wireless Power Week 2019:IEEE
MTT-S Wireless Power Transfer Conference (WPTC) and IEEE PELS Workshop on
Emerging Technologies: Wireless Power (WoW), 2019.

[33] Masaya Tamura, Yasumasa Naka, Kouseke Murai, “Design of Capacitive Coupler in
Underwater Wireless Power Transfer Focusing on KQ Product,” IEICE Transactions on
Electronics, vol. E101-C, no. 10, pp. 759-766, 2018.

[34] Takashi Ohira, “Beltrami-Klein disk model as viewed for use in impedance,” IEICE
Communications Express, vol. 9, Issue 7, pp. 256-261, 2020.

RCS・5G trial[35] Manabu Sakai, Kenji Nakagawa, Hiroki Iura, Naofumi Iwayama, Akihiro Okazaki,
Nobuhide Nonaka, Satoshi Suyama, Jun Mashino, Atsushi Okamura, Yukihiko Okumura,“Indoor Experimental Trial on Hybrid 16-Beam Spatial-Multiplexing for High SHF
Wide-Band Massive MIMO in 5G,”, the IEEE 88th Vehicular Technology Conference(VTC-Fall), 2018.

[36] Kenichiro Yamazaki, Kohei Izui, Kanada Nakayasu, Tatsuki Okuyama, Jun Mashino,
Satoshi Suyama, Toshifumi Sato, Yukihiko Okumura, “Field Experimental DL MUMIMO Evaluations of Low-SHF-Band C-RAN Massive MIMO System with over 100
Antenna Elements for 5G,”, the IEEE 88th Vehicular Technology Conference (VTCFall), 2018.

[37] Jun Mashino, Kiichi Tateishi, Kazushi Muraoka, Daisuke Kurita, Satoshi Suyama,
Yoshihisa Kishiyama, “Maritime 5G Experiment in Windsurfing World Cup by Using 28
GHz Band Massive MIMO,” the IEEE 29th Annual International Symposium on
Personal, Indoor and Mobile Radio Communications (PIMRC), 2018.

[38] Tatsuki Okuyama, Satoshi Suyama, Jun Mashino, Yukihiko Okumura, Kohei Izui,
Kenichiro Yamazaki, “5G Experimental Trials of 4.5 GHz Band Digital Beamforming in
8

Dense Urban Area,” the IEEE 29th Annual International Symposium on Personal, Indoor
and Mobile Radio Communications (PIMRC), 2018.

[39] Tatsuki Okuyama, Satoshi Suyama, Nobuhide Nonaka, Yukihiko Okumura, Takahiro
Asai, “Outdoor Experimental Trials of Millimeter-Wave Base Station Cooperation with
Digital Beamforming in High-Mobility Environments for 5G Evolution,” the IEEE 92nd
Vehicular Technology Conference (VTC2020-Fall), 2020.

[40] Tatsuki Okuyama, Kazushi Muraoka, Shinsuke Ibi, Takumi Takahashi, Satoshi Suyama,
Jun Mashino, Seiichi Sampei, Yukihiko Okumura, “Uplink Multi-User Massive MIMO
Using Gaussian BP in Highly Correlated Actual Environments,” IEEE 90th VehicularTechnology Conference (VTC2019-Fall), 2019.

[41] Nobuhide Nonaka, Kazushi Muraoka, Tatsuki Okuyama, Satoshi Suyama, Yukihiko
Okumura, Takahiro Asai, Yoshihiro Matsumura, “28 GHz-Band Experimental Trial at
283 km/h Using the Shinkansen for 5G Evolution,” the IEEE 91st Vehicular Technology
Conference (VTC2020-Spring), 2020.

[42] Manabu Sakai, Kenichiro Kamohara, Hiroki Iura, Hiroshi Nishimoto, Kazuaki Ishioka,
Yoshitaka Murata, Masayuki Yamamoto, Akihiro Okazaki, Nobuhide Nonaka, Satoshi
Suyama, Jun Mashino, Atsushi Okamura, Yukihiko Okumura, “Experimental Field Trials
on MU-MIMO Transmissions for High SHF Wide-Band Massive MIMO in 5G,” IEEE
Transactions on Wireless Communications, vol. 19, no. 4, pp. 2196 - 2207, Apr. 2020.

[43] Katsuya Kato, Kazuhiko Fukawa, Ryota Yamada, Hiroshi Suzuki, Satoshi Suyama, “LowComplexity MIMO Signal Detection Employing Multistream Constrained Search,” IEEE
Transactions on Vehicular Technology, vol. 87, no. 2. pp. 1217 - 1230, Feb. 2018.

[44] Kenta Tsuge, Yuyuan Chang, Kazuhiko Fukawa, Satoshi Suyama, Yukihiko Okumura,“Parameter Estimation for Block Diagonalization Based Hybrid Beamforming in Massive
MIMO Communications, “ the IEEE 90th Vehicular Technology Conference (VTC2019Fall), 2019.
・C-RAN related[45] Yi Jiang, Kenichiro Yamazaki, Toshihiro Hayata, Kohei Izui, Kanada Nakayasu,
Toshifumi Sato

Tatsuki Okuyama

Jun Mashino

Satoshi Suyama

Yukihiko

Okumura, “Performance Evaluation of Downlink Multi-User Massive MIMO with
Configurable Active Antenna System and Inter Access Point Coordination in Low-SHFBand,” IEICE Transaction on Communications, Vol.E102-B, No.8, pp. 1401-1410, 2019.

[46] Shota Ishimura, Byung-Gon Kim, Kazuki Tanaka, Shinobu Nanba, Kosuke Nishimura,
Hoon Kim, Yun C. Chung, Masatoshi Suzuki, “IF-over-Fiber Technology Aiming at
Efficient Bandwidth Utilization and Perfect Centralized Control for Next-Generation
9

MobileFronthaul

Links

in

C-RAN

Architectures,”

IEICE

TransactiononCommunications, Vol.E102-B, No.8, pp. 1745-1345, 2019.

[47] Kensuke Ikeda, Christina Lim, Ampalavanapillai Nirmalathas, Chathurika Ranaweera,“Comparison of Optical Transport Technologies for Centralized Radio Access Network
Using Optical Ground Wire,” IEICE Transaction on Communications, Vol.E103-B,
No.11, pp. 1240-1248, 2020.
・5G URLLC related[48] Osamu Nakamura, Yasuhiro Hamaguchi, Takumi Takahashi, Seiichi Sampei, “Low
Latency Interference Cancellation for Uplink URLLC Repetition Transmission,” theIEEE 91st Vehicular Technology Conference (VTC2020-Spring),2020.

[49] Yusaku Shiomitsu, Eiji Okamoto, Manabu Mikami, Hitoshi Yoshino, “Effective frame
configuration of 5G URLLC using open-loop HARQ for autonomous driving,” the IEEE
Vehicular Networking Conference (VNC), 2019.

[50] Yusaku Shiomitsu, Eiji Okamoto, Manabu Mikami, Hitoshi Yoshino, “Performance
analysis of early HARQ retransmission scheme in highway environments,” the IEEE
Vehicular Networking Conference (VNC), 2020.
・Mobile edge computing 関連[51] Krittin Intharawijitr, Katsuyoshi Iida, Hiroyuki Koga, Katsunori Yamaoka, “Empirical
Study of Low-Latency Network Model with Orchestrator in MEC,” IEICE Transaction
on Communications, Vol.E104-B, No.3, pp. 229-239, 2021.

[52] Hiroaki Nishiuchi, Gia Khanh Tran, Kei Sakaguchi, “Performance Evaluation of 5G
mmWave Edge Cloud with Prefetching Algorithm - Invited Paper”, the IEEE 87th
Vehicular Technology Conference (VTC Spring), 2018.
・V2X[53] Tomoki Maruko, Shinpei Yasukawa, Riichi Kudo, Satoshi Nagata, Mikio Iwamura,“Packet Collision Reduction Scheme for LTE V2X Sidelink Communications,” the IEEE
88th Vehicular Technology Conference (VTC-Fall), 2018.

[54] Shinpei Yasukawa, Tomoki Maruko, Shohei Yoshioka, Junichi Abe, Mikio Iwamura,“Towards V2X in Connected Car Society”, 24th OptoElectronics and Communications
Conference (OECC) and International Conference on Photonics in Switching andComputing (PSC), 2019.

SSC
10

・RTD

[55] M. Asada, and S. Suzuki, “Terahertz Emitter Using Resonant-Tunneling Diode andApplications,” Sensors 21(4), 1384 (FEB 2021). DOI: 10.3390/s21041384 (IF: Impact
Factor: 3.576, TC: Times Cited: 1)[56] K. Kasagi, S. Suzuki, and M. Asada, “Large-scale array of resonant-tunneling-diodeterahertz oscillators for high output power at 1 THz,” J. Appl. Phys. 125(15), 151601(APR 2019). DOI: 10.1063/1.5051007 (IF: 2.546, TC: 29)
・CMOS 300-GHz Transceiver ICs[57] S. Lee, S. Hara, T. Yoshida, S. Amakawa, R.B. Dong, A. Kasamatsu, J. Sato, and M.
Fujishima, “An 80-Gb/s 300-GHz-Band Single-Chip CMOS Transceiver,” IEEE J. SolidState Circuits 54(12), 3577-3588 (DEC 2019). DOI: 10.1109/JSSC.2019.2944855 (IF:5.013, TC: 23)[58] M. Fujishima, “Key Technologies for THz Wireless Link by Silicon CMOS Integrated
Circuits,” Photon. 5(4), 50 (DEC 2018). DOI: 10.3390/photonics5040050 (IF: 2.676,
TC: 7)[59] M. Fujishima, “Overview of sub-terahertz communication and 300 GHz CMOS
transceivers,” IEICE Electronics Express, 18(8), 1–7 (2021). (IF: 0.578, TC: -) DOI:
10.1587/elex.18.20212002
・Ga2O3 devices[60] M.H. Wong, H. Murakami, Y. Kumagai, and M. Higashiwaki, “Enhancement-Mode betaGa2O3 Current Aperture Vertical MOSFETs With N-Ion-Implanted Blocker,” IEEE
Electron Dev. Lett. 41(2), 296-299 (FEB 2020). DOI: 10.1109/LED.2019.2962657 (IF:4.187, TC: 19)[61] M.H. Wong, K. Goto, H. Murakami, Y. Kumagai, and M. Higashiwaki, “Current Aperture
Vertical beta-Ga2O3 MOSFETs Fabricated by N- and Si-Ion Implantation Doping,”
IEEE

Electron

Dev.

Lett.

40(3),

431-434(MAR2019).

DOI:

10.1109/LED.2018.2884542 (IF: 4.187, TC: 48)
・Graphene THz Laser Transistor[62] S. Boubanga-Tombet, W. Knap, D. Yadav, A. Satou, D.B. But, V.V. Popov, I.V.
Gorbenko, V. Kachorovskii, and T. Otsuji, “Room-Temperature Amplification of
Terahertz Radiation by Grating-Gate Graphene Structures,” Phys. Rev. X 10(3), 031004(JUL 2020). DOI: 10.1103/PhysRevX.10.031004 (IF: 15.762, TC: 5)[63] D. Yadav, G. Tamamushi, T. Watanabe, J. Mitsushio, Y. Tobah, K. Sugawara, A.A.
11

Dubinov, A. Satou, M. Ryzhii, V. Ryzhii, and T. Otsuji, “Terahertz light-emitting
graphene-channel transistor toward single-mode lasing,” Nanophoton. 7(4), 741-752(APR 2018). DOI: 10.1515/nanoph-2017-0106 (IF: 8.449, TC: 29)[64] V. Ryzhii, T. Otsuji, and M.S. Shur, "Graphene based plasma-wave devices for terahertz
applications," Appl. Phys. Lett. 116, 140501 (APR 2020). (invited, perspective) (IF:3.791, TC: 10) DOI: 10.1063/1.5140712

12