A proposed geometry for multi-resonant frequency selective surfaces

Frequency selective surfaces, FSS, are structures with many applications in telecommunication systems. Recently, FSS principles have been employed in chipless RFID technology, where an important point is to design a multi-resonant structure, tag, wherein the information can be encoded. In this work, a geometry for multi-resonant FSS is introduced. Considering the unit cell dimensions, very low resonant frequencies and a multi-resonant behavior are advantages of the proposed geometry, despite of the polarization dependence. Numerical results, obtained using the ANSYS-Designer software (MoM) are presented from 0.1 GHz to 12.0 GHz. Four FSS were designed, fabricated and experimentally characterized from 4.5 GHz to 12.0 GHz. A very good agreement is observed when compared measured results to numerical ones. Potential applications and the shown characteristics instigate other research groups to investigate the introduced geometry.