ABSTRACT
This chapter looks at research carried out on frequency-selective surface (FSS) applications, presents conformal metamaterials for antenna applications, and discusses planar high-impedance surfaces. In FSS technology, an array of resonant apertures within a metallic sheet yields a band-pass transmission response. Metamaterial structures designed using polar curves and mapping functions have the same basic operation as the conventional mushroom structure as demonstrated by the presence of a bandgap. The chapter presents results on the application of close-coupled aperture FSS specifically for waveguide filtering applications. Transmission line matrix is a time-domain method and as yields the fields within the defined workspace cells as well as results over a given frequency range for one simulation. The chapter provides the measured behavior of a guiding structure based on a hollow tube formed entirely from a two dimentional FSS. The tube has rectangular cross-section as in standard rectangular waveguide and hence is termed a frequency-selective guide as it has been observed to exhibit guidance.
