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

TL;DR

This paper critically examines the combination of switched transmit array (TMA) and frequency diverse array (FDA) techniques for synthesizing dot-shaped beampatterns, highlighting theoretical inaccuracies in prior FDA research.

Contribution

It provides a critical analysis of existing FDA methods, clarifying misconceptions and emphasizing the need for careful validation of theoretical claims in array synthesis.

Findings

Identifies fundamental errors in FDA-based beampattern synthesis

Highlights the importance of rigorous theoretical validation

Calls for cautious interpretation of FDA research results

Abstract

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.