Wheeler's current sheet concept and Munk's wideband arrays

About 60 years ago, Wheeler proposed the current sheet as a means to study (infinite) array impedance variations during scanning. The current sheet, viewed as the limiting case of an array of very small and closely spaced dipoles, was proposed by Wheeler as a way to model the array's scanning properties and matching issues. Much later, Ben Munk noted that realization of the current sheet in presence of a ground plane was critical to developing conformal wideband arrays. Wheeler's 1965 paper therefore provided vital inspiration that influenced future wideband antenna designers.