We present design, simulation, and fabrication of thin inkjet-printed frequency-selective structures involving U-shaped resonators. In order to obtain both multiband and polarization-independent operation, resonators are carefully arranged to construct thin structures. The designed arrangements are fabricated in a very low-cost inkjet-printing setup that is based on conventional printers loaded with silver-based inks. Initial results demonstrate favorable properties of the designs and their prototypes, demonstrating the feasibility of low-cost, but effective, frequency-selective structures
