An experimental study of the MEM applied to array antennas in the presence of multipath

The paper presents some experimental results on the maximum entropy method (MEM) used to estimate the wavenumber spectrum produced by plane waves which are incident upon a receiving array antenna, as encountered in a low-angle tracking radar. The results show that, unless the direct and reflected signals in such a system are spatially uncorrelated, the use of the MEM in this application yields erroneous results.