ABSTRACT
This chapter presents the newly defined metamorphic materials, which are artificial metallo-dielectric structures composed of passive elements and switches, and which exhibit bulk electromagnetic transitions among a set of dinstinct electromagnetic states, each characterized by a specific range of values of the reflected electromagnetic field. Early investigations of electromagnetic scattering from objects and interfaces characterized by an equivalent variable surface impedance reveal the presence of a set of universally defined, distinct electromagnetic states at a given frequency. The metamorphic material should perform the transitions at the same frequency, without changing the geometry of the scatterers or any other geometrical features. The chapter summarizes the features and functionalities of a new category of composite electromagnetic materials according to their ability to change the value of their reflection coefficient at the same frequency by electronically reconfiguring the interconnection of the conducting implants within them.
