REQUIREMENTS «Maximum rectenna size • Compatible with expanded ASAP stowage volume of 0.5 x 0.5 x 0.7 m3 • Total mass lower than 45 kg • Experimental complex tethered, stabilized by slow spin • Cable length, 150 - 250 m • Assumed centrifugal acceleration load on rectenna, 10 mm/s2 • Operational frequency, 12 GHz • Assumed (ideal) out-of-plane deformation under load, ± A/25 = ± 1 mm CONFIGURATION • Toroidal frame with: - meridian radius a= 0.14 m - crown radius b = 6.40 m - slenderness ratio p = 45.7 - polygonal approximation assembled from 48 segments • Rectenna membrane assumed based on 1-mil Kapton film, with an area of slightly less than 122.75 m2 • Attachment torus-membrane by tendons along scalloped arcs, with one attachment per torus segment; the scallop radius is taken at the equivalent membrane radius, (b - a) • Active pressurization system • Conventional protective container
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