Concept Study and Experiments for Space Solar Power System at USEF
- Paper number
IAC-07-C3.1.04
- Author
Mr. Takashi Saito, Institute for Unmanned Space Experiment Free Flyer (USEF), Japan
- Coauthor
Mr. Shoichiro Mihara, Institute for Unmanned Space Experiment Free Flyer (USEF), Japan
- Coauthor
Mr. Yutaro Kobayashi, Institute for Unmanned Space Experiment Free Flyer (USEF), Japan
- Coauthor
Mr. Hiroshi Kanai, Institute for Unmanned Space Experiment Free Flyer (USEF), Japan
- Year
2007
- Abstract
Institute for Unmanned Space Experiment Free Flyer (USEF) has been studying wireless power transmission under the contract of Ministry of Economy, Trade and Industry (METI) from FY2004 to FY2006. In the study, we have focused on the microwave power transmission as a key technology for the realization of future Space Solar Power System (SSPS). Results of this study together with our past activities such as SSPS system study are presented in this paper. (1) USEF has been studying SSPS concepts for more than a decade. The latest concept is a simple, technically feasible and practical configuration SSPS which consists of a power generation/transmission panel suspended by wires from a bus system above the panel. Units of tethered-SSPS are integrated to the commercial plant of 1 GW level (integrated tethered-SSPS with multiple buses). Several progress of the current study will be presented. (2) The integrated tethered-SSPS has huge amounts of power generation/transmission panels, having solar cells on one side and phased array antenna on the other side. The lightest weight and highest performance transmission panel is required for the system. The result of current study to reach the goal will be presented. (3) Environmental and safety assessment of microwave power transmission is also the theme of current investigation. The assessment has been performed for acquisition of public acceptance for the future microwave power transmission system. (4) Microwave transmission to the moving object is one of the spin off fields of SSPS technology. Light weight microwave transmission panel has developed with Kyoto University and rectenna for rover has also been developed. The microwave power transmission test result will be presented. (5) The shape of received power density distribution at the rectenna (power receiving antenna) is assumed a Gaussian profile. The level of power density around the edge of the rectenna is low. A rectenna element is necessary which is efficient at low power level. We designed and tested about such type of rectenna element.
- Abstract document
- Manuscript document
IAC-07-C3.1.04.pdf (🔒 authorized access only).
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