Reply to Comments on “Frequency Diverse Array Antenna Using Time-Modulated Optimized Frequency Offset to Obtain Time-Invariant Spatial Fine Focusing Beampattern”

We thank Fartookzadch [1] for reading our article [2] and giving positive comments on the optimized method in [2] to be interesting and useful, especially for the comments on the time-invariant issue, which give us the opportunity to correct some results and to discuss some considerations on time-invariant focusing beampattern that actually we borrowed from [3].