Comments on Combining Switched TMAs and FDAs to Synthesize Dot-Shaped Beampatterns

The idea of frequency diverse array (FDA) has been invigorated in the recent years by supposing to have the ability of stopping the electromagnetic wave propagation and producing secretive direct connections between distant points. However, it was based on a theoretical mistake in a series of published papers beginning from 2014. In fact, the issue was not very clear since 2018; hence the researchers should be very careful in relying on the papers of this topic.