Null steering using the minimax approximation by controlling only the current amplitudes

A linear programming technique using the minimax approximation to steer the nulls of an array by controlling the current amplitudes is presented. The technique determines the current amplitudes that produce the minimum sidelobe level for a given beam width and prescribed nulls in arbitrary directions. The results show the ability of this technique to steer the nulls in the sidelobe region while maintaining the main beam directed towards the desired signal. This technique also allows the number of controlled nulls to attain the full degrees of freedom for the array.