Sandwich Integrated PV/Microwave Transmission Concept: GEO-based inflatable mirror collects solar energy, and concentrates the beam on an array of solar cells, whose opposite sides (the other side of the “sandwich”) comprise a transmitting array for beaming RF energy to Earth. Key Features: Sandwich with PV on one side and RF on the other. Mass-produced sandwich Optics to permit simultaneous sun-tracking and earth pointing Suggestor/Source: Kaya, Woodcock, others Discussion This idea received some preliminary attention in the NASA/DOE study. It has subsequently been reexamined by Dr. Nobuyuki Kaya of Kobe University, who has proposed its use for a space power to Earth experiment called ISPER. Woodcock has suggested the use of PAMELA-like adaptive optics to provide beam taper. References Kaya, ISPER, discussions at Space Power Summit in Huntsville Ala, August 1993. Landis and Cull SPS 91, on integrated RF and PV Woodcock suggestion at SSP TIM 1995 Advantages Disadvantages Provides relatively large aperture Heat rejection is difficult Eliminates the electrical rotary Complex optical path joint required in the reference case Large size of GEO collector
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