1. space BaseD
pOWeR GeNeRaTION
Arshid Nisar
Electronics & Communication
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2. OUTLINe
 INTRODUCTION TO SBPS
 SPACE BASED SYSTEM MODEL
 GROUND BASED SYSTEM MODEL
 OPERATION
 APPLICATIONS
 CONCLUSION
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3. INTRODUcTION TO sBps
Solar energy
Dc power
Microwave
Microwave
Signal
Dc power
Groundsystemspacebasedsystem
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4. space BaseD sYsTeM
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5. pV ceLLs / pV sYsTeM:
Solar-cell
array
Efficiency = 25.6%
Vout=0.5 – 0.6 volt DC no load
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6. MICROWAVE GENERATOR
1 2
3 4
Frequency 5.8GHz Bandwidth few MHz power output up to 10 MW
e path under diff. fields
Velocity modulation
Space charge
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7. ANTENNA
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Pyramidal horn antenna Antenna radiation pattern
 Wide frequency range (1GHz to 20GHz) Small side-lobes
 Wide bandwidth
 Low VSWR
 High gain 20dB
 Good directivity
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8. PhAsEd ARRAy ANTENNA
Phased array antenna
Delay circuits
45deg
90deg
180deg
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9. BEAM CONTROl
 RETRO-dIRECTIVE BEAM CONTROl
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10. BEAM CONTROl
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11. Typical sbsp elemenT
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12. Ground based receivinG sysTem
Basic rectenna element
Rectenna= huge mesh of the above elements
Highly efficient…90% 12

13. receivinG sysTem
Schottky barrier diode
Trev.rec……very short
Low barrier potential
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14. 14
FILTER

15. mpT vs lpT
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16. advantages
Efficient
transmission to remote places
Need for grid, high tension transmission lines, substations are eliminated
Low maintenance cost
The cost of transmission and distribution would become less
The cost of electrical energy would be reduced
Wireless charging would also possible
Vehicles would be driven using WPT, no need of fuel.
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17. problems
 Issues identified during the study
 Complexity—30 years to complete
 Size—6.5 miles long by 3.3 miles wide
 Transmitting antenna diameter(1 km), and rectenna dia = 3km
 Cost—prototype would have cost $74 billion
 Health and environmental effects
 Would require a network of hundreds of satellites
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18. conclusion
 central attraction of space and technology in coming decades
 promises to bridge the gap between the existing power generation and
demand
 These technologies will be verified in the ground demonstration within
several years and will be fully verified in the space experiments within 10
years.
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19. Thank you…………..
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