Abstract
In this work, we numerically and experimentally demonstrated a bi-functional metamaterial (BMM) behaving as a single-band perfect absorber (SPA) or dual-band polarization converter (DPC) by integrating parasitic varactor diodes and capacitors on a flexible substrate. In the SPA mode, a high-absorption (with absorption of 90% at 3.9 GHz) was achieved. While in the DPC state, the BMM revealed the experimental cross-polarization conversion at 4.6 and 5 GHz with the corresponding PCR of 96 and 92%. The coincident in both simulation and experiment of the proposed BMM is promising for developing advanced future generations of electrically/mechanically tunable-meta-devices working in the GHz and THz ranges.
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