  We consider the effect of spatial correlations on sources of polarized
electromagnetic radiation. The sources, assumed to be monochromatic, are
constructed out of dipoles aligned along a line such that their orientation is
correlated with their position. In one representative example, the dipole
orientations are prescribed by a generalized form of the standard von Mises
distribution for angular variables such that the azimuthal angle of dipoles is
correlated with their position. In another example the tip of the dipole vector
traces a helix around the symmetry axis of the source, thereby modelling the
DNA molecule. We study the polarization properties of the radiation emitted
from such sources in the radiation zone. For certain ranges of the parameters
we find a rather striking angular dependence of polarization. This may find
useful applications in certain biological systems as well as in astrophysical
sources.
