Polarization diversity of the general nonuniformly spaced adaptive array

The ability of a least-mean-square (LMS) array of arbitrarily spaced and oriented elements to adapt to the electromagnetic polarization of signals, as well as their arrival angles, is considered. If an adaptive array uses elements responding to an arbitrary polarization of the incoming wave, the array feedback loops will automatically combine the signals from these elements tracking a desired signal with one polarization while nulling interference with a different polarization. The author examines the output signal-to-interference-plus-noise ratio (SINR) from an array of arbitrarily located and oriented dipoles of finite length as a function of both angles of arrival and separation between the signal polarizations on the Poincare sphere for a desired signal and an interference signal.<>