Activity Report of URSI Commission C Japan

Takashi Ohira

The 9th scientific workshop presented by the 19th URSI-C in Japan

1.    Convener: Satoshi Tsukamoto, Advanced Telecommunications Reserch Institute International

2.    Date/time: 13:00 -16:35, January 06, 2006

3.    Venue: Shimei-so, a resort house of Nippon Telephone and Telegram Health Insurance Association (Minakami, Gunma Prefecture, Japan)

4.    Registration fee: Free

5.    Listed attendees: 21 persons

6.    Local arrangement: Advanced Telecommunications Reserch Institute International

7.    Session title: gRadio Waves and Radio Receiver, History from crystal radio to Software Defined Radio and Cognitiveh

8.    Presentations: 50 min including Q&A for each speaker
(a) gHistory of transmitter and receiver architecturesh

        Speaker: Dr. Makoto TAROMARU, Wave Engineering Laboratories, Advanced Telecommunications Reserch Institute Intrenational.

(b) gTechnical Trends of RF signal Sampling Method for Realization of Software Defined Radio h

        Speaker: Associate Professor Yukitoshi SANADA, Keio University.

(c) gDevelopment of Analog-Digital Converter Chips for Software Radio Receiversh

       Speaker: Mr. Takafumi YAMAJI, Corporate R&D Center, Toshiba Corporation.

(d) gCognitive radio technique serves ubiquitously connected environmenth

       Speaker: Dr. Hiroshi HARADA, Yokosuka Radio Communications Research Center, National Institute of Information and Communications Technology

9.    Banquet

        Venue: at saloon in Shimei-So

        Attendees: 13 persons

10.    The steering committee meeting took place from 9:00 to 10:00 on January 07, 2006.

11.    Concluding

The presentations started from old radio set that has the vacuum tube covered few places for cost down, to software defined radio set that had innumerable transistors. The ideas and efforts by old engineers impressed and should be copied by engineers of today. Dr. Taromaru presented idea and working principle of the existing radio sets with showing its circuit diagram. Professor Sanada presented comparisons of sampling methods and devices that dominate variations and performance of software defined radio sets. And then, Mr. Yamaji presented A/D converter that is key device for software defined radio set, problems that should be resolved for example increase of power consumption at high speed, trends and result of his research. Finally, Dr. Harada introduced his radio set that had developed for several years and presented the future transceivers. A banquet was held with a lot of talk. It was continually discussed difference between old and new radio set components and technical problems for making a software defined radio set at the room. In spite of the inconvenient traffic access in the record heavy snow on that day and the next day of the workshop, all expected participants could join the workshop, and it ended without problems.

The 10th scientific workshop presented by the 19th URSI-C in Japan

1.    Convener: Mr. Toru Maniwa, Fujitsu Labs. Ltd.

2.    Date/time: 12:30 -17:00, May 12th, 2006

3.    Venue: Seminar room of Faculty of Science and Engineering, Saga University (Saga, Japan)

4.    Registration fee: Free

5.    Listed attendees: 26 persons

6.    Local arrangement: Aikawa Lab., Saga Univercity.

7.    Session title: gMillimeter-wave Renaissanceh

8.    Presentations: 60 min including Q&A for each speaker
(a) gThe renaissance of dielectric waveguidesh

        Speaker: Prof. Futoshi Kuroki, Kure National college of Tech.

(b) gMillimeter-wave Gigabit Wireless Technology and System Applicationsh

        Speaker: Mr. Kenichi Maruhashi, NEC corp.

(c) gHigh-speed signal processing technique in optical communication systemsh

       Speaker: Dr. Hideyuki Nosaka, NTT Corp.

(d) gThe Present State of Research and Development of Multi-Gigabit Wireless LAN Systemsh

       Speaker: Dr. Amane Miura, ATR Wave Engineering Laboratories

9.    Banquet

        Venue: Furuyu-Kakureisen, Saga, Japan

        Attendees: 12 persons

10.    The steering committee meeting took place from 8:30 to 9:45 on May. 13th, 2006.

11.    Concluding

This workshop entitled, "Millimeter-wave Renaissance", and was described from a wide viewpoint of the system, the waveguide, the filter, the oscillator, the module, the clock reproduction, the equalizer, the antenna, and security, etc. about the recent development of the millimeter wave. The discussion was actively carried out though they were few 26 participants. Especially, it was discussed which is better way to transmit digitalized data or analog modulated data on millimeter wave. All participated students told their impressions. Moreover, RFID system that was one of the next workshop themes was explained as the ramp session.

The 11th scientific workshop presented by the 19th URSI-C in Japan

1.        Convener: Dr. Hiroyoshi Yamada, Niigata University

2.        Date/time: 13h00 - 17h30, 25 August, 2006

3.        Venue: Graduate School of Science and Engineering, Niigata University (Niigata, Japan)

4.        Registration fee: Free

5.        Listed attendees: 40 persons

6.       Session title: gRadio Waves and Energy

7.        Presentation: 60 min including Q&A for each speaker

(a) gResearch Trends in Passive RFIDh

Speaker: Prof. Jin Mitsugi, Keio University

(b) gResearch Trends in Active RFIDh

Speaker: Dr. Masashi Shimizu, NTT

(c) gThe 3rd usage of Radio waves - Microwave Power Transmission -- h

              Speaker: Prof. Naoki Shinohara, Kyoto University

(d) gSignal Processings in Solar Power Satellite Systemh

              Speaker:Prof. Kozo Hashimoto, Kyoto University

8.   Reception

Venue: Hotel Fujiya, Iwamuro-Onsen (Hot Spring), Niigata, Japan

Attendees: 13 persons

9.        The steering committee meeting took place from 9h00 to 10h00 on 26 August, 2006

10.      Ramp session was also held where Tohru Maniwa, Fujitsu Labo,
demonstrated a span-new FRID product and handy spectrum analyzer.

11.    Concluding Remarks

This eleventh scientific workshop was entitled "Radio Waves and Energy". A diverse range of applications from passive/active RFID and microwave power transmissions including solar power satellite system were presented by the front-line researchers in the field, and there was a fruitful gathering of participants. Intensive discussions on this field of radio wave applications were held with discerning questions, and the meeting was a big success. At the banquet, demonstrations of the RFID system were presented by Dr. Maniwa. All participants had discussed on RFID systems including their frequency allocation policy late at night and it was interesting.

The 12th scientific workshop presented by the 19th URSI-C in Japan

1.        Convener: Dr. Yukihiro Kamiya, Tokyo University of Agriculture and Technology

2.        Date/time: 13h00 -17h15, November 24, 2006

3.        Venue: Kumamoto National College of Technology (Kumamoto, Japan)

4.        Registration fee: Free

5.        Listed attendees: 24 persons

6.        Local arrangement: Prof. Yoshitada Iyama, Kumamoto National College of Technology

7.        Session title: gDENPAISHIN, Revolutions on wireless technologyh

8.        Presentation: 40 min, Q&A: 20 min. for each speaker

(a) gA development story of path loss formulae for mobile radio propagationh

Speaker: Prof. Masaharu Hata, Okayama University

(b) gEigen mode representation of free space and its application to antenna scattering problemsh

Speaker: Prof. Kiyomichi Araki, Tokyo Institute of Technology

(c) gBasic study on the Relativistic Momentum of Electromagnetic Wavesh

Speaker: Dr. Yohei Ishikawa, Senior Fellow, Research Center for Next Generation Technology, MURATA MFG. Co. Ltd.

(d) gURSI-C: Activity plans for 20th URSI-C in Japanh

Speaker: Prof. Shozo Komaki, Osaka University

9.        Reception

Venue: Hotel gShirasagisoh, Tamana, Kumamoto, Japan

Attendees: 19 persons

10.    The steering committee meeting took place from 8h00 to 10h00 on November 24, 2006.

11.    Concluding Remarks

(a)    This scientific workshop was the final workshop of the 19th URSI-C in Japan. Using this opportunity, letters of appreciation were presented to Prof. Masaaki Shinji, Tokai University and Prof. Toshiyuki Yakabe, The University of Electro-Communications for their support to the workshops.

(b)    A lamp session was held after the reception party. This session was organized for introducing historical literatures and discussing them. Due to cooperation of attendees, various precious literatures were introduced projecting it on a screen.