Waveguide Dispersion Tailoring by Using Embedded Impedance Surfaces

In optics and photonics, tailoring a waveguide's dispersion and cutoff frequency is important, as these parameters govern the operating frequencies and device dimensions. The authors show that the substrate-integrated impedance surface (SIIS) enables arbitrary control of the propagation characteristics of closed-shape waveguides, and they develop a theoretical framework for the simplest form of SIIS. This SIIS-loading technique may open up possibilities for miniaturizing various waveguide-based components and networks, and for enhancing their uses in microwave sensing and nonlinear functions.