Systematic Design of Metasurface Angular Filters

We present a systematic methodology for synthesizing metasurface (MS) angular filters, which are beneficial for improving antenna radiation patterns: by deriving a convenient rational-function form for the reflection coefficient, we facilitate efficient and flexible design of such devices. We validate our framework via full-wave simulations by devising all-pass angular filters with tunable phase featuring rigorously designed physical MS inclusions. Our results pave the path towards complete control over the angular response of MSs, from theory to practice.