SAWE Report - Cal Poly San Luis Obispo
SAWE Report - Cal Poly San Luis Obispo
SAWE Report - Cal Poly San Luis Obispo
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30<br />
20<br />
10<br />
0<br />
-10<br />
-20<br />
-30<br />
-40<br />
-50<br />
1 GHz<br />
5 GHz<br />
10 GHz<br />
12 GHz<br />
RFP Requirement<br />
Figure 4.3 - Radar Cross Section at 0º Lookup Angle<br />
Figure 18 shows that the vehicle does clearly meet the frontal RCS requirement of 0.05 m 2 (-12<br />
dB) set forth in the Request for Proposal. It also shows that the measures taken at shaping the<br />
aircraft are working. The leading edge and trailing edge of the wing come together closely. There<br />
is a large return directly from the side of the aircraft due to the wing tip and fuselage side. It can<br />
also be seen that although there are slight variations in the returns due to the different<br />
frequencies, they do not vary that much. This is due to the fact that the Vendetta is a rather large<br />
vehicle. None of the surfaces are small enough to interfere with the wavelengths of the radar.<br />
The weakest azimuth angle for the Vendetta is the 40° angle where the leading edge sends a large<br />
spike forward.<br />
Looking at the equally crucial 15° lookup angle cross section in Figure 4.4 reveals a slightly<br />
different picture.<br />
19