1999 Fiscal Year Final Research Report Summary
System study and technical development on the Solar Power Satellite with concentrators and transmitters in the sandwich structure
| Project/Area Number |
09555302
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Aerospace engineering
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| Research Institution | Kobe University |
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Principal Investigator |
KAYA Nobuyuki Kobe University, Faculty of Engineering, Professor, 工学部, 教授 (30093503)
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| Project Period (FY) |
1997 – 1999
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| Keywords | Solar Power Satellite / Microwave Power Transmission / F-class Amplifier / Slot Antenna / Active Phased Array Antenna / Rectenna / IMS-Band / Pilot Signal |
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| Research Abstract |
The Solar Power Satellite (SPS) is one of the unique and hopeful electric power stations to satisfy ever-increasing energy demand on the ground without destroying the environment of our mother planet Earth. However, new breakthroughs must be investigated on the SPS, because the reference system designed by DOE/NASA is too huge and too expensive for the realization. We have already proposed a new concept of the SPS, which consists of a generator/transmitter of a sandwich structure and large collectors. We are developing a new high power microwave transmitter with a retrodirective antenna in the sandwich structure in order to realize our new concept of the SPS. The new microwave transmitter has successfully been improved as follows :
1)Higher frequency can make the transmitter smaller. The frequency of the microwave is 4.8 GHz to make the diameter of the transmitter half.
2)Half frequency (2.4 GHz) of the microwaves is used as a pilot signal of the retrodirective antenna to make RF circuit very simple and accurate.
4)The transmitting antenna is directly connected to the amplifiers to reduce the loss of cables and the weight of the antenna.
We successfully carried out a Microwave Power Transmission demonstration using the retrodirective antenna for the accurate beam control.
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