Recalculating linear array antennas to compensate for failed elements while maintaining fixed nulls

A new technique for the synthesis of linear array antenna patterns is prese nted. This technique allows to fix nulls in prescribed directions, to simul ate the presence of failed elements and to obtain power patterns when both situations occur at the same time. These patterns are synthesized by findin g the optimal configuration of the array factor roots using the simulated a nnealing technique. Examples of fixing nulls and/or failed elements in both sum and flat-topped beam patterns are presented.