A Comparative Study of Decoupling Techniques for Waveguide Slot Array Antennas

In this paper, we present a comparative study of three decoupling techniques for waveguide slot array antennas, including half wall, corrugation and metal fence. Their decoupling efficacy and impact on element patterns are investigated under two typical element spacings: 0.5λ 0 and 1λ 0 . A summary highlighting the differences among these three decoupling techniques is provided to gain insight into which specific application scenarios are best suited for each technique.