Microwave Analog Experiments

The refractive index of acrylic at microwave frequencies is in the range typical of silicates in the visual. An acrylic model was therefore used in the microwave scattering facility to simulate the scattering by an 8 p.m diameter and 0.25 (J,m thick silicate flake in the visual part of the spectrum.

Figure 3 shows the intensity and polarization of the scattered light averaged over a uniform distribution of orientations to simulate the scattering from a thin cloud of flakes in random orientations. The total number of orientations used in the average is 1620 and the tilt angle between the normal to the surface of the flake and the spin axis is varied in steps of 10 degrees. Again, the spin axis is perpendicular to the scattering plane. The data has been

Scattering angle isegreesl Scattering angle (degreei]

Figure 3. The dependence of intensity and polarization on scattering angle averaged over a uniform distribution of orientations to simulate randomness. Solid and dashed lines represent red and blue wavebands, respectively.

Scattering angle isegreesl Scattering angle (degreei]

Was this article helpful?

0 0

Post a comment