Department of Advanced Energy, Graduate School of Frontier Science, University of Tokyo
Department of Advanced Energy, Graduate School of Frontier Science, University of Tokyo
Department of Advanced Energy, Graduate School of Frontier Science, University of Tokyo
Department of Advanced Energy, Graduate School of Frontier Science, University of Tokyo
Department of Aeronautics and Astronautics, School of Engineering, University of Tokyo
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)
The twenty-ninth Space Energy Symposium (February 26, 2010, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara)
抄録（英）
A power beaming system to a Micro Aerial Vehicle (MAV) using 5.8GHz microwaves has been developed. With this wireless power system, a battery on a vehicle is charged by receiving a microwave beam while the vehicle is circling above a phased array transmitter. Then, it can fly over the area struck by disaster, for example, continuously without landing and take-off for recharging.The schematic of the system developed in our laboratory consists of three sub-systems; a pointing system, a tracking system, and a receiving system. A microwave beam is pointed to the MAV using the phase information of its pilot signal. Software retro-directive function has been realized through a PC control. An electric motor for a propeller is driven by the power received on a rectenna array.Steering of a 5.8GHz microwave beam was achieved by controlling the phase of microwaves emitted from the multiple antennas called phased array system, not by mechanical control of the antenna's attitude. Our phased array is composed of five horn antennas. Each horn antenna transmits 0.7W of power and its phase is independently controlled by a 6-bit digital phase shifter connected to a PC. The beam divergence was about 9deg, which corresponds to the beam quality factor M(exp 2)=1.6. The beam steering angle was from -9deg to +9deg.In the tracking system, three patch antennas receive the pilot signal of 2.45GHz microwave sent from the MAV. Two pairs of patch antennas were aligned in the x and y directions with the distance of lambda. The incident angle of the pilot signal is analyzed using a LabVIEW system on the PC.In the receiving system, a conventional patch rectenna array has been replaced by an ultra-light and flexible rectenna array, which will be an indispensable technology to realize real "micro" robots, such a MAV. The flexible patch antenna made of cupper tapes were put on a thin felt pad. As a result, the weight per unit reception area was improved to 79mg/cm2
内容記述
形態: カラー図版あり
形態: CD-ROM1枚
内容記述（英）
Physical characteristics: Original contains color illustrations
Note: One CD-ROM
MAV用5.8GHzレクテナの開発
