Micropatterns FSS Optimization Through Hybrid EBPSO Algorithm for C-Band Shielding Applications

This paper presents a new concept of micropatterns frequency selective surface (MFSS) for C-band electromagnetic interference (EMI) shielding applications. The design consists of 64 microstructures, which are optimally arranged in an 8×8 array using a hybrid EBPSO algorithm. Microstructures are comprehensively designed and optimized to achieve polarization-insensitive and high oblique incident angle stable characteristics with miniaturized structure. The equilibrium arrangement of the micropattern geometry of the proposed FSS provides a high selective stopband filtering response at 7.39 GHz with an S21< −10 dB stopband bandwidth (BW) percentage of 25.64%. The precipitable novelties of this paper are generating micropatterns FSS structure for high Shielding Effectiveness >70 dB and maintaining patterns symmetry for polarization insensitivity with the miniature structure of 0.18λ<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub>×0.18λ<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub>×0.036λ<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub>, λ<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> corresponds to the lower operating frequency.