Inkjet-printed “4D” tunable spatial filters using on-demand foldable surfaces

A state-of-the-art fully Inkjet-printed tunable frequency selective surface on cellulose paper is presented, which uses a Miura origami structure for an on-demand linear variation in inter-element distance and the effective length of the resonant dipole elements, resulting in an observable shift in the operational frequency of the structure. The dipole elements are placed on the foldlines along with special “bridge-like” structures to realize first-of-its-kind truly flexible conductive traces over sharp bends. Simulation and measurement results show that the Miura-FSS can be tuned to a wide range of frequencies and features a large angle of incidence rejection.