The document outlines the history and development of space-based solar power (SBSP) starting from Nikola Tesla's early vision in the 1890s to modern proposals and initiatives, including NASA's programs. It describes the operation of solar power satellites, including the technology behind antennas for energy conversion and transmission. While SBSP has the potential to eliminate fossil fuel use, challenges such as satellite placement, interference, and health hazards remain.

1. SPACE BASED SOLAR POWER
TRANSMISSION

2. History…
 Nikola Tesla in late 1890s, Pioneer of induction
techniques.
 His vision for “World Wireless System”.
 In 1940s ability to convert energy to
microwaves was developed.
 In 1964 William C. Brown demonstrated a
Rectenna.
WPT via Solar Power Satellite
2

3. Solar Power Satellite
WPT via Solar Power Satellite
3
 In 1968 idea for solar power satellites was proposed
by Peter Glaser.
 Between 1978 and 1981, the Congress authorized
the Department of Energy (DoE).
 In 1999, NASA's Space Solar Power Exploratory
Research and Technology program (SERT) was
initiated.
 On Nov 2, 2012, China proposed space collaboration
with India that mentioned SBSP.

4. WPT via Solar Power Satellite
4

5. Advantages over Earth based solar power
WPT via Solar Power Satellite
5

6. Four basic steps involved in the conversion of solar energy to electricity and
delivery are:
WPT via Solar Power Satellite
6

7. Solar Power Satellite
Solar Power Satellites (SPS) have proposed to collect solar
energy in space and beam it down to the Earth.
WPT via Solar Power Satellite
7

8. How SPS Works??
WPT via Solar Power Satellite
8

9. “An antenna is an electrical device which converts electric power into
radio waves.
The transmitting antenna on the horizontal under-surface faces the Earth, and
the other two sides of the prism carry solar arrays.
The Microwave thus produced Travels through Atmosphere & is collected by
RECTENNAS on Earth.
The Spacetenna has a square shape whose dimension is 132 meters by 132
meters and which is regularly filled with 1936 segments of sub array.
 There will be about 2.6 million antenna elements in the spacetenna.
SPACETENNA: (THE ANTENNA ON SATELLITE)
WPT via Solar Power Satellite
9

10. “An antenna comprising a mesh of dipoles and diodes
for absorbing microwave energy from a transmitter
and converting it into electric power.”
Diameter is around 5km .
Microwaves of 2.45 GHz frequency are used to transmit
power from the satellite to the rectenna.
 It is 85% efficient and 95% of the beam will fall on the
rectenna
.
RECTENNNA :(RECTIFYING ANTENNA)
WPT via Solar Power Satellite
10

11. 5,000 MW Receiving Station
(Rectenna). This station is about a
mile and a half long.
WPT via Solar Power Satellite
11
5,000 MW Receiving Station (Rectenna).
This station is about a mile and a half long.

12. Disadvantages
 Geosynchronous satellites would take up large sections of space
 Interference with communication satellites
 Possible health hazards
 Effects of long term exposure
 Exposure is equal to the amount that people
receive from cell phones and microwaves
WPT via Solar Power Satellite
12

13. Conclusions
 The technology for the space based solar power
(SBSP) is still in development
 If the SBSP is developed then it will completely
remove the usage of fossil fuels.
BY –
CH. ADITYA SASANK