A Miniaturized FSS Based Band-Stop Filter for EMI Shielding Applications

A miniaturized frequency selective surface having band-stop characteristics is presented. The proposed FSS is modeled on Rogers RO4350 substrate having unit cell dimensions of 6.75 mm x 6.75 mm. It attains at least 49.43 dB attenuation within the frequency band of 17.88 GHz to 26.72 GHz (i.e., fractional bandwidth 39.64%) to provide effective electromagnetic interference (EMI) shielding. The single layer structure also gives identical results for both incident transverse-electric and transverse-magnetic fields. The size compactness, wide-band operation and simple structure make this FSS a potential candidate for EMI shielding applications in K-band.