👉 A waveguide is a type of resonant structure that is designed to transmit and receive waves in a specific frequency range. It consists of a series of thin, flexible walls that are connected together by a dielectric material (usually air) or other materials, creating a path for the wave energy to propagate. In a typical waveguide, the walls are typically made of a material with a high dielectric constant (a property that increases the ability of the material to absorb and reflect waves), such as
