The third scientific workshop
presented by the 26th URSI-C in Japan

Session title:
"Antennas and Propagation Systems toward 6G"


1. Convener: Dr. Kengo Nishimoto (Mitsubishi Electric Corporation)

2. Date/time: 13:30 - 16:30, October 26th, 2024

3. Venue: Awara-onsen Seiryukaku, Awara city, Fukui pref.
(Online participation was available)

4. Registration fee: Free

5. Listed attendees: 19 persons (local participation), 17 persons (online participation)

6. Technical arrangement: Dr. Kengo Nishimoto (Mitsubishi Electric Corporation)

7. Local arrangement: Prof. Takuji Arima (Tokyo University of Agriculture and Technology)

8. Session title: "Antennas and Propagation Systems toward 6G"

9. Presentations:
  • 13:30 - 13:40 Opening Remarks
    Prof. Mitoshi Fujimoto, Chair, Commission C of URSI-JNC
    (University of Fukui)
  • 13:40 - 14:20 "Sub-THz band antenna for propagation experiments"
    Dr. Keisuke Sato (Denki Kogyo Co., Ltd)
  • 14:20 - 15:00 "Experimental study of 300 GHz band indoor propagation characteristics"
    Prof. Akihiko Hirata (Chiba Institute of Technology)
  • 15:00 - 15:10 Coffee Break (10 min.)
  • 15:10 - 15:50 "Introduction of ISAC standardization trends and wireless sensing technology
    in 6G"
    Dr. Tomoki Murakami (NTT)
  • 15:50 - 16:30 "300-GHz-band two-dimensional beam scanning transceiver using silicon
    CMOS"
    Dr. Akifumi Kasamatsu (NICT)
  • 16:30Closing

10．Reception:
It held from 18:00 to 20:00 at Awaraonsen Seiryukaku, Awara city, Fukui pref. The number of attendees was 14 persons.

11．The Steering committee meeting:
It took place from 8:30 to 9:30 on October 27th, 2024, at Awara-onsen Seiryukaku and on online.

12. Concluding Remarks
In 6G, there are high expectations for the use of millimeter wave and terahertz bands to achieve communication speeds that exceed the limits of 5G, and for ISAC, which integrates not only communication functions but also environmental sensing and data collection functions. At this meeting, with an eye toward 6G, we planned lectures on the latest research and development trends in antennas and propagation systems, and related technologies, then shared the state-of-the-art research in Japan.
Dr. Keisuke Sato (Denki Kogyo Co., Ltd.) gave a lecture on sub-THz-band antennas developed for propagation measurements. Analysis and measurement results of a 300-GHz-band reflector omnidirectional antenna and a 150-GHz-band waveguide slot omni antenna were shown, and we had a lively discussion about manufacturing methods suitable for millimeter wave and terahertz bands.
Prof. Akihiko Hirata (Chiba Institute of Technology) gave a lecture on the results of experimental studies on indoor propagation characteristics in the 300 GHz band. He constructed a THz-band propagation measurement system and showed us the results of evaluating the MIMO reception area. He showed that the shadowing loss of the human body is greatly influenced by reflections from the insides of the arms and clothing.
Dr. Tomoki Murakami (NTT) gave a lecture on an overview of ISAC, standardization trends, and wireless sensing technology for ISAC. He explained the use cases of ISAC specified by 3GPP, the latest academic technology trends, and the results of studies on movement detection using CSI.
Dr. Akifumi Kasamatsu (NICT) gave a lecture on a 300-GHz-band two-dimensional beam scanning transceiver using silicon CMOS. He developed a 300-GHz-band RF front-end using silicon CMOS and demonstrated wireless transmission with ±16 degrees of beam steering when integrated with a lens antenna that achieves two-dimensional beam steering by combining a 1-axis mechanical drive and a 1-axis phased array.
All of these are important technologies of antennas and propagation systems that will be the basis for the realization of 6G. This meeting served as a place for participants to understand the actual state-of-the-art R&D situation and share awareness of technical issues and prospects for the future image envisioned by each participant.


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