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
1
Peak power at 15 and 200 m
Peak power (W)
0.01
1 . 10 3
1 . 10 4
1 . 10 5
1 . 10 6
1 . 10 7
0.1
0 20 40 60 80 100
f (GHz)
range = 15 m
range = 200 m
Figure 4-16: Peak Transmitter Power Required for Obstacle Detection at 15 m and 200 m
as a Function of Frequency
Average power at 15 and 200 m
1.10 3 range = 15 m
Average power (W)
1.10 4
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 = 200 m
Figure 4-17: Average Transmitter Power Required for Obstacle Detection at 15 m and
200 m as a Function of Frequency
4.3.6.2 Altimetry Results
The altimetry requirements are the most stringent for range resolution because altimetry readings
will be used for landing. The minimum-range resolution is 6 cm when the Entomopter is
within 3 m of the ground.
The following assumptions were made:
Table 4-2: Parameters for Altimetry Analysis
Effective target cross section, σ (m 2 ) 1
Temperature of receiver To (Kelvin) 290
Range resolution, ∆Rmin (m) 0.06
Isotropic gain of transmitting antenna G T (dBi) 8
253