RADAR CROSS SECTION
 
     
 

Plane - Wave Excitation of Metallic Objects

Structure on IE3D:

Simulation Result:

Sphere Diameter = 20 mm. Ellipzoid Axis Dimensions = 24 mm ´ 24mm ´ 14.286 mm.

Cylinder Diameter = 20 mm. Cylinder Height = 13.33 mm. Cubic Side Length =17.732 mm

Simulation Result:

RCS (mm2) Sphere Ellipzoid Cylinder Cube
Cells/Unknowns (Meshed at 8 GHz) 352/528 448/672 160/288 150/300
PlatformTime (sec/freq)PlatformTime Pentium 133235 Pentium 133383 Pentium 13341 Pentium 13340
PlatformTime (sec/freq)PlatformTime Pentium Pro 200108 Pentium Pro 200155 Pentium Pro 20021 Pentium Pro 20019
Geometry File sphere.geo ellipz.geo cylin.geo cubic.geo
f = 0.125 GHz 0.00117 0.00158 0.00165 0.00314
f = 0.250 GHz 0.01872 0.01706 0.02512 0.05031
f = 0.500 GHz 0.29904 0.23093 0.41020 0.80414
f = 1.000 GHz 4.75352 3.95900 6.50253 12.8134
f = 2.000 GHz 73.8011 71.9146 101.909 199.159
f = 4.000 GHz 818.213 972.187 1299.18 1472.20
f = 8.000 GHz 116.335 951.107 180.521 2002.38


Below 2 GHz, the objects are small compared to wavelength. The RCS for each object is proportional to f4, where f is the frequency.

The RCS is a oscillating function of frequency when the dimensions of an object is comparable to wavelength.

Smooth curved structures create smaller RCS.