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RADAR CROSS SECTION


This picture depicts the simulated monostatic radar cross-section (RCS) of a square-plate trihedral (also known as a corner reflector) as a function of azimuth and elevation. (RCS is a measure of the backscattered radiation observed when an object is irradiated.) The trihedral was modeled as a perfect electric conductor with dimensions 6" x 6" x 6"; it was irradiated at 10GHz. The computation of RCS was performed using the electromagnetic simulation package XPatch; the results agree almost perfectly with observations.

The bright center portion of the image is due to the strong triple-bounce backscatter of the trihedral when its three component plates are similarly oriented with respect to the snesor. The bright portions on the left and right sides of the image (near 0 and 90 degrees azimuth) are due to the double-bounce backscatter from the bottom plate with the left and right back plates, respectively; similarly, the bright portion on the bottom of the image is a result of the double-bounce backscatter from the left and right back plates when they are viewed at 0 degrees elevation. The bright portions in the lower corners and at the top of the image correspond to the specular response of each of the trihedral's three component plates.



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