cassiopeia - breaking the non-scaling paradigm - iac 2018...cassiopeia solar power satellite: •...
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CASSIOPEIA Solar Power Satellite Breaking the Non-Scaling Paradigm
IAC 2018 – Bremen, Germany
Ian Cash
CASSIOPEIA SOLAR POWER SATELLITE:
• Constant Aperture – Electronic Beam Steering through 360°
• Solid-State – No Moving Parts, No Electron Tube Technology
• Integrated – All SPS Functions Modular at Sub-Wavelength Scale
• Orbital – Geosynchronous, MEO, Sun-Synchronous, Near-Space
• Phased Array – Fully Active, Retrodirective Beam Formation
BASELOAD SPACE SOLAR POWER OVERCOMING THE EARTH/SUN ROTATIONAL MIS-MATCH
Solar or Electrical Powervia Articulated Joints
Solid-State with Massive, Redundant Photovoltaics
CASSIOPeiA – Solid-State, Unique Design- Minimal Avoidable Losses- No Temporal Redundancy
360° STEERING AT RF ELEMENT SCALE
λ/4
λ/2
Cardioid Pattern:Steerable null replaces the rear reflector (necessary with other phased array designs)
360° STEERING AT RF ELEMENT SCALE
CASSIOPeiA Phased Array - Worldwide Patent-Applied
HELICALLY-ARRAYED ELEMENTS ➔ CONSTANT APERTURE
CASSIOPEIA CONSTANT APERTURE PHASED ARRAY 56X88 ELEMENTS – INDEPENDENTLY VALIDATED: U. STRATHCLYDE, UK
SUB-WAVELENGTH-SCALE MODULARITY: INTEGRATED PHOTOVOLTAICS
1, 2 or 4-sun system insolation with high-concentration PV (70 W/cm²)
Fresnel POEKöhler SOEIII-IV 4J ChipCu Spreader
Planar Quadrant (1-sun)790 kW / tonne
CASSIOPEIA SOLID-STATE REFLECTOR VARIANTS
[SSSC: Solid-State Symmetrical Concentrator – Provides uniformly concentrated, collimated illumination – Patent applied]
Planar Full (2-sun)830 kW / tonne
SSSC (×2, 4-sun)1000 kW / tonne
Stratospheric !
ELLIPTICAL SUN-SYNCHRONOUS 3HR ORBIT, 5 SPS CONSTELLATION
MODIFIED GEOSYNCHRONOUS LAPLACE-PLANE ORBIT
• Inclination modified according to area/mass ratio (4.04 m²/kg)
• “Frozen” orbit; minimal station-keeping propellant required
• Daily analemma (figure-“8”) ground track
• 1 – 2 GW (baseload, ac grid) for 1,350 – 2,000 tonnes
Thank You