“…Magnetically tunable FSS is implemented by using a ferrite substrate for the permeability of the ferrite substrate can change with the external bias magnetic field (Chan et al, 2015;Gao et al, 2016;Liu et al, 1997;Parker & Savia, 2001). MEMS tunable FSSs are realized by using various MEMS actuators (Coutts et al, 2008;Lu et al, 2017;Safari et al, 2015;Schoenlinner et al, 2004;Semenikhin et al, 2016), which maybe can be driven by electrostatic, magnetic, thermal, piezoelectric, and electromagnetic methods. Although the magnetically and mechanically, even MEMS tunable FSSs do not need bias circuits, they usually suffer from several disadvantages such as complicated fabrication processes, slow tuning response, and small tuning range.…”