Phase II Final Report - NASA's Institute for Advanced Concepts

Chapter 4.0 Entomopter Flight Operations
4.3 Entomopter-borne Active Emitters for Navigation and Communication
Average power at 200 and 1000 m
1.10 4 range = 200 m
Average power (W)
1.10 5
1.10 6
1.10 7
1.10 8
1.10 9
1.10 10
1.10 11
1.10 12
0 20 40 60 80 100
f (GHz)
range = 1000 m
Figure 4-23: Average Transmitter Power Required for Communications at 200 and
1,000 m as a function of Frequency
The peak power will remain constant with bit rate and interpulse period. However, the average
power will vary. The required average powers for 200-m and 1,000-m ranges are plotted versus
data rate at 18 GHz in Figure 4-24. The range of data rates in Figure 4-24 corresponds to interpulse
periods T of 10,000 T w (dt = 1/10,000) to 100 T w (dt = 1/100).
0.01
Average power at 200 and 1000 m
Average power (W)
1 . 10 3
1 . 10 4
1 . 10 5
1 . 10 6
0 0.5 1 1.5 2 2.5 3
data rate (Mbits/second)
range = 200 m
range = 1000 m
Figure 4-24: Average Transmitter Power Required for Communications at 200-m and
1,000-m as a Function of Data Rate
Power consumption for positioning will not take place on board the Entomopter. It will be performed
from the rover.
4.3.7 Future Development Path for the Active Communications
Option
In the area of the communications/control subsystem option, future development would include
the design and development of the subsystem components including the transmitter, receiver,
and antennas. The proposed subsystem uses extremely short, wideband, rapid sequences of RF
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