Planar, low-profile, wideband, wide-scan phased array antenna using stacked-disc radiator

Design and analysis of a low profile broadband wide scan array

“…The thicker ridged parallel plate element [2,3] has better cross-polar isolation performance but its height is about the same. Another possible low profile element is the high dielectric constant puck radiator with stacked discs [4]. It has about an octave bandwidth, wide scan capability and a height of 0.15λ C .…”