  In this paper, the goal is to achieve an ultra low sidelobe level (SLL) and
sideband levels (SBL) of a time modulated linear antenna array. The approach
followed here is not to give fixed level of excitation to the elements of an
array, but to change it dynamically with time. The excitation levels of the
different array elements over time are varied to get the low sidelobe and
sideband levels. The mathematics of getting the SLL and SBL furnished in detail
and simulation is done using the mathematical results. The excitation pattern
over time is optimized using Genetic Algorithm (GA). Since, the amplitudes of
the excitations of the elements are varied within a finite limit, results show
it gives better sidelobe and sideband suppression compared to previous time
modulated arrays with uniform amplitude excitations.
