Proceedings of the International Astronautical Congress, IAC 2020-October 2020 [Refereed]
Martian Moons eXploration (MMX) is a mission to Martian moons under development in JAXA with international partners to be launched in 2024. This paper introduces the system definition and the latest status of MMX program. “How was water delivered ...
PROCEEDINGS OF THE IEEE 101(6) 1438-1447 Jun 2013 [Refereed]
A solar power satellite (SPS) is a renewable energy system that converts the sun's energy into electricity in space and transmits it to Earth using microwaves. The SPS concept, first proposed in 1968 in the United States, has recently started attr...
A terahertz (THz) beam steering method is demonstrated by applying the characteristic of grating lobe (GL) radiation from a linear array antenna and the interference of femtosecond optical pulses. A photoconductive device is illuminated by two fem...
Ken-ichiro Maki Takayuki Shibuya Chiko Otani Koji Suizu Kodo Kawase
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES 32(5) 603-617 May 2011 [Refereed]
We have investigated the characteristics of a terahertz (THz) beam steering method based on a combination of difference-frequency generation (DFG) with the principle of the phased array antenna. In the DFG of THz radiation from a nonlinear optical...
2011 36TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ) 2011 [Refereed]
We present a THz beam steering method that is based on the generation of grating lobe(GL) radiation from linear array antenna and interference principle of femtosecond laser beam. THz GL radiation with the bandwidth of 110GHz was generated from a ...
2012 IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications, IMWS-IWPT 2012 - Proceedings 131-134 2012 [Refereed]
Toward the orbital demonstration of a solar power satellite (SPS), a breadboard model of the SPS has been developed for preliminary experiments including wireless power transmission. The model forms a thin panel structure with a thickness of 6 cm,...
Koji Tanaka Maki Kenichiro Masashi Takahashi Tadashi Ishii Susumu Sasaki
2012 IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications, IMWS-IWPT 2012 - Proceedings 191-194 2012 [Refereed]
We are developing a bread board model for a microwave wireless power transmission (WPT) from a satellite in orbit to the ground. WPT using microwaves is one of the critical and important technologies toward a solar power satellite (SPS). We have c...
Director General, ISAS