The presence of glide symmetries in periodic structures can introduce beneficial modifications
in their electromagnetic properties. The difference between glide and non-glide periodic structures is due to
the distinctive coupling between their constituent sub-unit cells. In this paper, we describe the recent discov eries on the remarkable properties of glide-symmetric periodic structures, which include widened stopbands,
reduced dispersion, as well as enhanced anisotropy and magnetic response. These properties are explained
through canonical structures simulated with two methods: mode matching and multimode transfer-matrix
analysis. We also review the recent use of these distinctive properties for solving technological problems
in practical devices such as filters, gap waveguide components, low-leakage flanges, compressed lenses,
low-reflected material transitions and leaky-wave antennas with applications in 5G terrestrial communication
systems, millimetre-wave satellite systems and automated contactless measurement techniquesGobierno de España Salvador de Madariaga PRX19/00025Ministerio de Ciencia, Innovación y Universidades TEC2017-84724-
