A Dynamically Filtering Polarization Rotation Reflective Surface

A polarization rotation reflective surface (PRRS) with a dynamic polarization rotation (PR) null is proposed. The working mechanism of PRRS is analyzed based on even-odd mode theory. Hence, a bottom-integrated reflector approach can be proposed to create the PR null. The PR null can be independently and dynamically modulated by this approach. Building upon this method, an electrically reconfigurable PRRS is further developed, enabling dynamic manipulation of the PR null for the first time. Simulation results demonstrate that the proposed reconfigurable PRRS unit cell achieves wideband PR performance from 3.2 GHz to 12.9 GHz, with a dynamically tunable PR null ranging between 4.7 GHz and 10 GHz. A prototype consisting of 11×11 unit cells was fabricated, and radar cross section (RCS) measurements were conducted to validate its performance. Experimental results confirm the feasibility of dynamically adjusting the PR null.