A Novel Dual-polarized Frequency Selective Surface with Reconfigurable Passband

The letter designs a novel frequency selective surface (FSS) with reconfigurable passband. Each unit consists of upper and lower metal and the dielectric material. The upper and lower metal are the same. The upper metal consists of a folded metal ring and the cross-shaped fold line. By loading and adjusting the adjustable inductance at the four connection points of the metal ring and the cross-shaped line, the passband can be reconfigurable. When the inductance is 1nH, the passband of the FSS is 4.8-5.1GHz, moreover, the transmission coefficient is lower than -0.31dB at 4.8-5.1GHz, and lower than -9dB in the 3.3-3.6GHz. But when the inductance is 21nH, the passband of the FSS is 3.3-3.6GHz, in addition, the transmission coefficient is lower than -0.67dB at 3.3-3.6GHz, and lower than -12.3dB in the 4.8-5.1GHz. The FSS has dual-polarization since the structure has rotational symmetry.